CN110640340A - Laser welding method for realizing rapid splicing of high-strength steel - Google Patents
Laser welding method for realizing rapid splicing of high-strength steel Download PDFInfo
- Publication number
- CN110640340A CN110640340A CN201810681834.1A CN201810681834A CN110640340A CN 110640340 A CN110640340 A CN 110640340A CN 201810681834 A CN201810681834 A CN 201810681834A CN 110640340 A CN110640340 A CN 110640340A
- Authority
- CN
- China
- Prior art keywords
- laser
- welding
- laser beam
- splicing
- strength steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 201
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000000137 annealing Methods 0.000 claims abstract description 19
- 238000005520 cutting process Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000005096 rolling process Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 238000010924 continuous production Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/0006—Working by laser beam, e.g. welding, cutting or boring taking account of the properties of the material involved
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
A laser welding method for realizing rapid splicing of high-strength steel comprises the following steps: 1) respectively taking the two hot coils of the high-strength steel as a forward coil and a backward coil; cutting the tail of the front coil and the head of the rear coil by double-cutting shears and then splicing in a centering way; 2) using CO2The laser is used as a welding laser source, a laser beam directly enters a light splitting device after coming out of an external light path of the laser source, and the light splitting device sequentially comprises a reflecting mirror, a spectroscope and a focusing mirror; the laser beam forms three laser beams after coming out of the light splitting device, and the first laser beam falls before the splicing welding seam and is used for preheating before welding; the second laser beam falls on the splicing welding seam to form a molten pool for laser welding; the third laser beam is used for post-welding annealing after falling on the splicing welding seam; the three beams are controlled by adjusting the power output of the laser source, the wedge angle of the spectroscope and the area of the laser reflection surfaceThe energy ratio of the laser beam; 3) the angle of the spectroscope is adjusted to control the beam spacing of the three laser beams, and the focusing lens is adjusted to control the focal depth of the three laser beams.
Description
Technical Field
The invention relates to a laser welding technology, in particular to a laser welding method for realizing rapid splicing of high-strength steel.
Background
In the cold rolling continuous production process, the very important point is that the tail end of the forward hot rolled strip steel is welded with the head of the subsequent strip steel to form a welding seam, and then the welding seam passes through a rolling line to form continuous rolling, so that the production efficiency can be greatly improved. At this time, if the quality of the weld is poor, the weld breaks while passing through the pass line, resulting in production interruption. The laser welding technology is suitable for welding steel strip plates in many fields, especially for welding steel strip plates, because the laser welding technology has the advantages of high laser welding quality, no contact, large depth-to-width ratio, small deformation, beautiful welding and basically consistent mechanical properties of welding seams with base materials. The problems of welding hydrogen-induced cracks, welding stress, softening of a welding heat affected zone, reduction of toughness, fatigue of a welding joint and the like easily occur during welding of high-strength steel. At present, when the cold continuous rolling mill is used for producing high-strength steel, in order to obtain proper tensile strength, fatigue strength and better toughness at a welding seam and avoid the generation of hydrogen-induced cracks, the welding seam needs to be preheated before welding and annealed after welding, the production mode prolongs the production time, greatly reduces the production efficiency, increases the complexity of equipment and increases the maintenance cost and difficulty of the equipment.
High-strength steel grades with the tensile strength of more than or equal to 400MPa are subjected to pre-heating before welding and annealing treatment after welding during production of the cold continuous binding machine, and the welding time is long;
when the high-strength steel is rolled by a continuous rolling mill, under the action of large rolling reduction and large tension, the strip breakage of the welding line is easy to occur, and the strip breakage rate of the welding line is as high as 4.4%;
disclosure of Invention
The invention aims to provide a laser welding method for realizing rapid splicing of high-strength steel, and a novel high-strength steel welding process for simultaneously carrying out preheating, welding and annealing in the laser welding process.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a laser welding method for realizing rapid splicing of high-strength steel comprises the following steps:
1) respectively taking the two hot coils of the high-strength steel as a forward coil and a backward coil; cutting the tail of the front coil and the head of the rear coil by double-cutting shears and then splicing in a centering way; the splicing gap, namely the gap between the tail of the front coiled steel strip and the head of the rear coiled steel strip after being sheared by the double-shear is 0.05mm-0.30 mm;
2) using CO2Laser as welding laser source, the CO2Laser beams of the laser directly enter a light splitting device after coming out of an external light path of the laser source, and the light splitting device sequentially comprises a reflecting mirror, a spectroscope and a focusing mirror; the laser beam forms three laser beams after coming out of the light splitting device, wherein the first laser beam falls before the splicing welding seam and is used for preheating before welding; the second laser beam falls on the splicing welding seam to form a molten pool for laser welding; after the third laser beam falls on the splicing welding seam, the third laser beam is used for post-welding annealing to eliminate residual welding stress; the energy ratio of the three laser beams is controlled by adjusting the power output of the laser source, the wedge angle of the spectroscope and the area of the laser beam reflecting surface;
3) and adjusting the angle of the spectroscope to control the beam spacing of the three laser beams, and adjusting the focusing mirror to control the focal depth of the three laser beams.
Preferably, the laser beam energy uses a laser power density ρ, which is the laser output power P/welding speed V; the selection of the laser beam pre-welding preheating power P and the laser beam post-welding annealing power P depends on the thickness h of the strip steel, and the power densities rho of the first laser beam and the third laser beam are as follows: rho < k-0.13h +0.06h2, wherein k is a constant and is 0.35-0.55; the energy of the second laser beam used for laser welding must be enough to melt the welding wire and the base material to form a welding seam, and the power density rho of the second laser beam is: rho is more than k-0.13h +0.06h 2; wherein, the laser power density rho unit is 60kJ/m, the laser output power P unit kW, the welding speed V unit m/min and the strip steel thickness h unit mm.
Preferably, the reflection areas S1 of the first to third laser beams in the beam splitter are: s2: s3 is 1: (3.0-4.5): (1.0-1.5).
Preferably, the focal depth of the laser is controlled to be 0.5-2mm under the central thickness of the strip steel; the laser beam interval is controlled to be 20mm-50 mm.
Preferably, the welding wire is filled in a rear wire feeding mode.
Preferably, the main components of the welding wire comprise: less than or equal to 0.08 percent of C, less than or equal to 0.90 percent of Mn, less than or equal to 0.85 percent of Si, and the balance of Fe.
Preferably, the welding wire filling speed is higher than the welding speed, and the ratio of the welding speed to the welding wire filling speed is 66-90%.
Preferably, helium is selected as a protective gas to protect and cool the weld joint during laser welding.
The method takes two hot coils of high-strength steel as a forward coil and a backward coil respectively; cutting the tail of the front coil and the head of the rear coil by double-cutting shears and then splicing in a centering way; in order to ensure laser focusing and weld penetration, the splicing gap is 0.05mm-0.30 mm; the splicing gap is a butt joint gap between the tail of the forward strip steel and the head of the continuous strip steel after being sheared by the double-shear shears, if the gap is too small or the gap is negative, the welded seam has a height difference after welding, and the welded seam is easy to crack or cause belt breakage under the action of large tension in the operation process; if the clearance is too large, the welding pool is unstable, the welding seam is not formed well, even laser leaks from the abutted seam, and the welding seam cannot be formed.
The laser beam directly enters the beam splitter device after coming out of an external light path of the laser source, and forms three beams after coming out of the beam splitter, wherein one beam falls on the splicing welding seam, one beam falls in front of the splicing welding seam, and the other beam falls behind the splicing welding seam; the power output of the laser source and the wedge angle of the spectroscope are adjusted to control the energy ratio of the three laser beams, wherein the laser falling on the splicing welding seam is used for forming a molten pool for laser welding, one laser falling in front of the splicing welding seam is used for preheating before welding, and the other laser falling behind the splicing welding seam is used for annealing after welding to eliminate residual welding stress.
The laser source power output control is critical. If the energy of the laser beam used for pre-welding preheating and post-welding annealing is too high, a welding pool is formed on the base metal, and if the energy of the laser beam is too low, the effects of improving the material structure and eliminating the welding stress cannot be achieved. Therefore, the laser beam energy for pre-weld and post-weld annealing must neither be too high nor too low. The laser beam energy can be characterized using a laser power density ρ (power density ρ ═ laser output power P/welding speed V), the choice of pre-weld preheating power pdix and post-weld annealing power pdix being dependent on the strip thickness h and being chosen with reference to the following relation: ρ < k-0.13h +0.06h2, where k is a constant (0.35 ≦ k ≦ 0.55); in contrast, the laser beam energy used for laser welding must be sufficient to melt the wire and base material to form the weld, and therefore the power is selected to be: rho > k-0.13h +0.06h 2.
Meanwhile, in order to effectively ensure the power distribution proportion of the processes of pre-welding, post-welding and welding, after the wedge angle of the spectroscope is determined, the mirror surfaces corresponding to three groups of different wedge angles are respectively used for reflecting a preheating laser beam, a welding laser beam and an annealing laser beam, and in the actual production process, the reflection area S1 of three beams of laser corresponding to the spectroscope is as follows: s2: s3 is 1: (3.0-4.5): (1.0-1.5).
The focal depth of the laser is controlled to be 0.5-2mm under the central thickness of the strip steel so as to realize the maximum efficiency utilization of the laser energy; the laser beam spacing is controlled to be 20mm-50mm, the laser beam spacing control is very important, on one hand, a large molten pit cannot be established due to interaction of laser beams on the surface of a welding material due to an excessively small spacing, on the other hand, the three laser beam spacing devices cannot perform pre-welding preheating and post-welding annealing due to excessively small distances, and meanwhile, the welding time is prolonged;
the welding wire is filled in a post-feeding mode, the welding wire can be melted by using the heat of a welding pool, and the laser beam has more energy to melt the base metal in the mode, so that the formation of a keyhole and the stability of the welding process are ensured;
the welding wire has the composition requirements that C is less than or equal to 0.08%, Mn is less than or equal to 0.90% and Si is less than or equal to 0.85%, the silicon content of the welding wire is important in the welding process, and the selection of the low-silicon, low-carbon and low-manganese welding wire can further dilute the silicon, carbon and manganese content of a welding seam area on one hand, and can increase the toughness of the welding seam and improve the fatigue resistance of the welding seam by adjusting the chemical composition of the welding seam on the other hand;
in order to ensure that the welding seam is stably formed and filled fully, the filling speed of the welding wire is slightly higher than the welding speed, and the ratio of the welding speed to the filling speed of the welding wire is between 66 and 90 percent;
helium is selected as a protective gas to carry out protective cooling on the welding seam in the laser welding process. The selection of the protective gas is crucial, and the helium can effectively eliminate plasma cloud formed above the keyhole in the laser welding process, so that the laser transmissivity and the stability of a welding pool are ensured.
According to the welding characteristics of the high-strength steel, on the one hand, the welding quality is improved by reasonably selecting a welding process, welding wire materials, controlling protective gas and the like on the basis of comprehensive mechanical properties of a welding joint; on the other hand, the beam splitter is used for dividing the large energy output by the laser into three beams which act on the welding seam and the front and rear areas of the welding seam respectively, so that the functions of preheating before welding, laser welding and annealing after welding are synchronously realized, the rollability of the welding seam of the high-strength hot rolled plate is improved, and the strip breakage rate of the welding seam is reduced.
Compared with the welding method of low-alloy high-strength steel disclosed by Chinese patent application No. CN200610128410.X, the welding method removes welding stress and eliminates hydrogen brittleness of a welding seam joint by preheating before welding, preserving heat and eliminating hydrogen so as to ensure the quality of the welding seam. On the one hand, the invention starts from the comprehensive mechanical properties of the welding seam joint and starts to improve the welding quality by reasonably selecting the welding process, the material of the welding wire, controlling the protective gas and the like; on the other hand, the beam splitter is used for dividing the large energy output by the laser into three beams which are respectively acted on the welding seam and the front and rear areas thereof, so that the functions of pre-welding preheating, laser welding and post-welding annealing are synchronously realized, and the beam splitter has at least the following two advantages: firstly, a welding seam heating device does not need to be additionally arranged, so that the equipment investment and the maintenance cost are reduced; secondly, pre-welding preheating, laser welding and post-welding annealing are carried out synchronously, so that the process flow is greatly shortened, the welding production time is reduced, and the capacity of a continuous unit is remarkably improved.
The invention has the beneficial effects that:
according to the welding characteristics of the high-strength steel, the rolling performance of the welding seam of the portable high-strength steel is improved from the aspects of reasonably selecting a welding process and welding wire materials, controlling the flow of protective gas, splitting the energy of a laser by using a beam splitter to realize the synchronization of pre-welding preheating, laser welding and post-welding annealing functions, and the like, and the strip breakage rate of the welding seam is reduced. Through on-site practical verification, after the welding method is used, the splicing welding seam of the high-strength hot rolled plate can smoothly realize continuous production in an acid continuous rolling unit, the plate is stable to pass, the strip breakage rate of the welding seam is less than or equal to 2.8 thousandths, and the production efficiency of a cold rolling production line can be greatly improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
FIG. 2 is a schematic diagram of the laser beam split by the beam splitter according to the embodiment of the present invention at the weld joint and the front and rear regions.
Detailed Description
Referring to fig. 1 and 2, the laser welding method for realizing the rapid splicing of the high-strength steel comprises the following steps:
1) respectively taking the two hot coils of the high-strength steel as a forward coil and a backward coil; cutting the tail of the front coil and the head of the rear coil by double-cutting shears and then splicing in a centering way; the splicing gap, namely the butt joint gap of the tail of the front coiled steel strip and the head of the rear coiled steel strip after being sheared by the double-shear is 0.05mm-0.30 mm;
2) using CO2Laser as welding laser source, the CO2Laser beam 100 of the laser directly enters a light splitting device after coming out of an external light path of a laser source, and the light splitting device sequentially comprises a reflecting mirror 1, a spectroscope 2 and a focusing mirror 3; the laser beam forms three laser beams after coming out of the light splitting device, wherein the first laser beam 101 falls in front of the splicing welding seam 201 of the strip steel 200 and is used for preheating before welding; the second laser beam 102 falls on the strip steel splicing welding seam 201 to form a molten pool for laser welding; after falling on the strip steel splicing welding seam 201, the third laser beam 103 is used for post-welding annealing to eliminate residual welding stress; controlling the energy ratio of the three laser beams by adjusting the power output of the laser source, the wedge angles theta 1-theta 3 of the spectroscope and the laser reflection surface areas S1-S3;
3) the angle of the spectroscope 2 is adjusted to control the beam distance of the three laser beams, and the focusing mirror 3 is adjusted to control the focal depth of the three laser beams.
As shown in fig. 1, a laser beam is emitted from inside the resonator; the laser beam is reflected to the surface of the spectroscope 2 by the reflector 1; the spectroscope 2 consists of three mirror surfaces with different wedge angles theta 1-theta 3; the beam splitter has three different wedge angles, so that the laser beam is divided into three laser beams 101-103; three laser beams 101-103 reflected by the spectroscope 2 pass through the focusing mirror 3 to form a heat source required by preheating, welding and annealing, as shown in fig. 2.
Two hot coils of high-strength steel are respectively used as a front coil and a rear coil, and relevant laser tailor-welded materials are shown in a table 1; cutting the tail of the front coil and the head of the rear coil by double-cutting shears and then splicing in a centering way; selecting CO with high beam quality and high energy density and laser power of 12.0KW2The laser is used as a welding laser source; the laser beam interval from the light splitter is controlled within 20mm-50 mm.
The relevant welding process controls are shown in table 2; the wire composition requirements are shown in table 3.
TABLE 1 laser tailor-welded materials
TABLE 2 laser welding and shielding gas flow parameter control requirements
TABLE 3 welding wire composition requirements for laser filler wire welding
| Composition (I) | C | Mn | Si | S | P | Cr | Al | Fe |
| Content (%) | 0.050 | 0.890 | 0.810 | 0.011 | 0.014 | 0.008 | 0.009 | ＞98.2 |
The method can smoothly realize the continuous production of the acid continuous rolling mill set, has stable plate passing and less than or equal to 2.8 per mill of the strip breakage rate of the welding seam, can greatly improve the production efficiency of a cold rolling production line, can be widely applied to welding machine equipment adopting a laser wire filling process, and is particularly suitable for a silicon steel cold rolling mill set adopting a continuous rolling process.
Claims (8)
1. A laser welding method for realizing rapid splicing of high-strength steel is characterized by comprising the following steps:
1) respectively taking the two hot coils of the high-strength steel as a forward coil and a backward coil; cutting the tail of the front coil and the head of the rear coil by double-cutting shears and then splicing in a centering way; the splicing gap, namely the butt joint gap of the tail of the front coiled steel strip and the head of the rear coiled steel strip after being sheared by the double-shear is 0.05mm-0.30 mm;
2) using CO2Laser as welding laser source, the CO2Laser beams of the laser directly enter a light splitting device after coming out of an external light path of the laser source, and the light splitting device sequentially comprises a reflecting mirror, a spectroscope and a focusing mirror; the laser beam forms three laser beams after coming out of the light splitting device, wherein the first laser beam falls before the splicing welding seam and is used for preheating before welding; the second laser beam falls on the splicing welding seam to form a molten pool for laser welding; after the third laser beam falls on the splicing welding seam, the third laser beam is used for post-welding annealing to eliminate residual welding stress; the energy ratio of the three laser beams is controlled by adjusting the power output of the laser source, the wedge angle of the spectroscope and the reflection area of the laser beams;
3) and adjusting the angle of the spectroscope to control the beam spacing of the three laser beams, and adjusting the focusing mirror to control the focal depth of the three laser beams.
2. The laser welding method for realizing the rapid splicing of the high-strength steel as claimed in claim 1, wherein the laser beam energy uses laser power density P, and the power density P is laser output power P/welding speed V; the selection of the laser beam pre-welding preheating power P and the laser beam post-welding annealing power P depends on the thickness h of the strip steel, and the power densities rho of the first laser beam and the third laser beam are as follows: rho < k-0.13h +0.06h2, wherein k is a constant and is 0.35-0.55; the energy of the second laser beam used for laser welding must be enough to melt the welding wire and the base material to form a welding seam, and the power density rho of the second laser beam is: rho is more than k-0.13h +0.06h 2; wherein, the laser power density rho unit is 60kJ/m, the laser output power P unit kW, the welding speed V unit m/min and the strip steel thickness h unit mm.
3. The laser welding method for realizing the rapid splicing of the high-strength steel as claimed in claim 1, wherein the reflection areas of the first laser beam, the second laser beam, the third laser beam and the fourth laser beam in the spectroscope corresponding to S1: s2: s3 is 1: (3.0-4.5): (1.0-1.5).
4. The laser welding method for realizing the rapid splicing of the high-strength steel as claimed in claim 1, wherein the focal depth of the laser beam is controlled to be 0.5-2mm under the central thickness of the strip steel; the laser beam interval is controlled to be 20mm-50 mm.
5. The laser welding method for realizing the rapid splicing of the high-strength steel as claimed in claim 2, wherein a post wire feeding mode is adopted for welding wire filling.
6. The laser welding method for realizing the rapid splicing of the high-strength steel as claimed in claim 2 or 5, wherein the main components of the welding wire comprise: less than or equal to 0.08 percent of C, less than or equal to 0.90 percent of Mn, less than or equal to 0.85 percent of Si, and the balance of Fe.
7. The laser welding method for realizing the rapid splicing of the high-strength steel as claimed in claim 2 or 5, wherein the welding wire filling speed is higher than the welding speed, and the ratio of the welding speed to the welding wire filling speed is 66-90%.
8. The laser welding method for realizing the rapid splicing of the high-strength steel as claimed in claim 1, wherein helium is selected as a protective gas to perform protective cooling on the welding seam in the laser welding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810681834.1A CN110640340A (en) | 2018-06-27 | 2018-06-27 | Laser welding method for realizing rapid splicing of high-strength steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810681834.1A CN110640340A (en) | 2018-06-27 | 2018-06-27 | Laser welding method for realizing rapid splicing of high-strength steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110640340A true CN110640340A (en) | 2020-01-03 |
Family
ID=68988822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810681834.1A Pending CN110640340A (en) | 2018-06-27 | 2018-06-27 | Laser welding method for realizing rapid splicing of high-strength steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110640340A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112045369A (en) * | 2020-08-29 | 2020-12-08 | 新疆八一钢铁股份有限公司 | Wire feeding steady-state welding method for solid-state laser welding machine in high-latitude area |
| CN112355471A (en) * | 2020-10-28 | 2021-02-12 | 哈尔滨工业大学（威海） | Underwater laser in-situ repair device and application method thereof |
| CN112355472A (en) * | 2020-10-28 | 2021-02-12 | 哈尔滨工业大学（威海） | Multifunctional underwater welding laser head |
| CN114535805A (en) * | 2022-04-07 | 2022-05-27 | 攀钢集团攀枝花钢铁研究院有限公司 | 980DP cold-rolled high-strength steel with yield strength of 700Mpa grade and splicing method |
| CN114535809A (en) * | 2022-04-07 | 2022-05-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel with yield strength of 380Mpa grade and splicing method |
| CN114535811A (en) * | 2022-04-07 | 2022-05-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel with yield strength of 300Mpa grade and splicing method |
| CN114559159A (en) * | 2022-04-07 | 2022-05-31 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel with yield strength of 260MPa and splicing method |
| CN114571084A (en) * | 2022-04-20 | 2022-06-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Welding method for low-carbon aluminum killed steel acid rolling process |
| CN114603257A (en) * | 2022-04-07 | 2022-06-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel with yield strength of 420Mpa grade and splicing method |
| CN114619146A (en) * | 2022-04-07 | 2022-06-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel with yield strength of 340Mpa grade and splicing method |
| CN114762918A (en) * | 2021-01-15 | 2022-07-19 | 中国科学院上海光学精密机械研究所 | Manufacturing method of high-strength steel laser tailor-welded part |
| CN115582624A (en) * | 2022-09-23 | 2023-01-10 | 中国第一汽车股份有限公司 | A Method for Welding Ultra-High-Strength Steel Using Dual Laser Beams |
| CN115786912A (en) * | 2022-06-28 | 2023-03-14 | 同济大学 | A method for preparing a composite modified layer by combining a laser two-step method with an electroless plating process |
| CN116275509A (en) * | 2023-05-15 | 2023-06-23 | 苏州亚太精睿传动科技股份有限公司 | Laser welding method |
| CN116532798A (en) * | 2023-05-15 | 2023-08-04 | 苏州亚太精睿传动科技股份有限公司 | Laser welding equipment |
| CN116571830A (en) * | 2023-05-12 | 2023-08-11 | 东莞市德镌精密设备有限公司 | Welding method and manufacturing process of LED chip of mini & micro-LED |
| CN118455738A (en) * | 2024-07-10 | 2024-08-09 | 深圳市牧激科技有限公司 | Double-light-path composite laser welding equipment and processing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0706072A2 (en) * | 1994-10-07 | 1996-04-10 | Sumitomo Electric Industries, Ltd. | Optical device for laser machining |
| CN101564799A (en) * | 2008-04-25 | 2009-10-28 | 宝山钢铁股份有限公司 | Compound welding method by using semiconductor laser and CO2 laser |
| CN103862173A (en) * | 2014-03-25 | 2014-06-18 | 大连理工大学 | A high-speed laser welding method for invar steel film |
| CN104227239A (en) * | 2013-06-20 | 2014-12-24 | 宝山钢铁股份有限公司 | Laser welding method for tailored band steel |
| CN106425096A (en) * | 2016-11-17 | 2017-02-22 | 大族激光科技产业集团股份有限公司 | Laser welding device |
| CN207043553U (en) * | 2017-07-03 | 2018-02-27 | 榆林学院 | A kind of new pattern laser welder |
-
2018
- 2018-06-27 CN CN201810681834.1A patent/CN110640340A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0706072A2 (en) * | 1994-10-07 | 1996-04-10 | Sumitomo Electric Industries, Ltd. | Optical device for laser machining |
| CN101564799A (en) * | 2008-04-25 | 2009-10-28 | 宝山钢铁股份有限公司 | Compound welding method by using semiconductor laser and CO2 laser |
| CN104227239A (en) * | 2013-06-20 | 2014-12-24 | 宝山钢铁股份有限公司 | Laser welding method for tailored band steel |
| CN103862173A (en) * | 2014-03-25 | 2014-06-18 | 大连理工大学 | A high-speed laser welding method for invar steel film |
| CN106425096A (en) * | 2016-11-17 | 2017-02-22 | 大族激光科技产业集团股份有限公司 | Laser welding device |
| CN207043553U (en) * | 2017-07-03 | 2018-02-27 | 榆林学院 | A kind of new pattern laser welder |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112045369A (en) * | 2020-08-29 | 2020-12-08 | 新疆八一钢铁股份有限公司 | Wire feeding steady-state welding method for solid-state laser welding machine in high-latitude area |
| CN112355471A (en) * | 2020-10-28 | 2021-02-12 | 哈尔滨工业大学（威海） | Underwater laser in-situ repair device and application method thereof |
| CN112355472A (en) * | 2020-10-28 | 2021-02-12 | 哈尔滨工业大学（威海） | Multifunctional underwater welding laser head |
| CN114762918A (en) * | 2021-01-15 | 2022-07-19 | 中国科学院上海光学精密机械研究所 | Manufacturing method of high-strength steel laser tailor-welded part |
| CN114603257A (en) * | 2022-04-07 | 2022-06-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel with yield strength of 420Mpa grade and splicing method |
| CN114559159A (en) * | 2022-04-07 | 2022-05-31 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel with yield strength of 260MPa and splicing method |
| CN114535809A (en) * | 2022-04-07 | 2022-05-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel with yield strength of 380Mpa grade and splicing method |
| CN114619146A (en) * | 2022-04-07 | 2022-06-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel with yield strength of 340Mpa grade and splicing method |
| CN114535805A (en) * | 2022-04-07 | 2022-05-27 | 攀钢集团攀枝花钢铁研究院有限公司 | 980DP cold-rolled high-strength steel with yield strength of 700Mpa grade and splicing method |
| CN114535811A (en) * | 2022-04-07 | 2022-05-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel with yield strength of 300Mpa grade and splicing method |
| CN114571084A (en) * | 2022-04-20 | 2022-06-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Welding method for low-carbon aluminum killed steel acid rolling process |
| CN115786912B (en) * | 2022-06-28 | 2023-11-07 | 同济大学 | A method for preparing composite modified layer by combining laser two-step method and electroless plating process |
| CN115786912A (en) * | 2022-06-28 | 2023-03-14 | 同济大学 | A method for preparing a composite modified layer by combining a laser two-step method with an electroless plating process |
| CN115582624A (en) * | 2022-09-23 | 2023-01-10 | 中国第一汽车股份有限公司 | A Method for Welding Ultra-High-Strength Steel Using Dual Laser Beams |
| CN116571830A (en) * | 2023-05-12 | 2023-08-11 | 东莞市德镌精密设备有限公司 | Welding method and manufacturing process of LED chip of mini & micro-LED |
| CN116532798A (en) * | 2023-05-15 | 2023-08-04 | 苏州亚太精睿传动科技股份有限公司 | Laser welding equipment |
| CN116275509B (en) * | 2023-05-15 | 2023-09-08 | 苏州亚太精睿传动科技股份有限公司 | Laser welding method |
| CN116275509A (en) * | 2023-05-15 | 2023-06-23 | 苏州亚太精睿传动科技股份有限公司 | Laser welding method |
| CN118455738A (en) * | 2024-07-10 | 2024-08-09 | 深圳市牧激科技有限公司 | Double-light-path composite laser welding equipment and processing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110640340A (en) | Laser welding method for realizing rapid splicing of high-strength steel | |
| US5567335A (en) | Process and apparatus for welding sheet metal edges | |
| US9364921B2 (en) | Method of manufacturing laser welded steel pipe | |
| CN107999916B (en) | A kind of compound silk filling melt-brazing method of the double light beam laser-TIG of dissimilar material | |
| CN109014943B (en) | A cleaning and welding integrated device used in endless rolling of black coils | |
| CN101733564A (en) | Laser-electric arc composite heat source high-speed welding method of ultrahigh strength steel | |
| CN113523615B (en) | Double-beam laser welding method for medium plate | |
| CN113967789B (en) | A laser welding method for aluminum-silicon coated steel | |
| CN101992354A (en) | Micro-beam plasma arc/laser hybrid welding method | |
| JP5954009B2 (en) | Manufacturing method of welded steel pipe | |
| CN113146047A (en) | Laser-electric arc hybrid welding equipment and welding method for aluminum alloy | |
| JP4577811B2 (en) | Heat treatment method for laser welds of high strength steel plates | |
| CN109175691A (en) | A kind of welding method of galvanized steel | |
| CN112045369A (en) | Wire feeding steady-state welding method for solid-state laser welding machine in high-latitude area | |
| JP2002361469A (en) | Welding method | |
| CN102848086A (en) | Method for improving strength and flexibility of super strength steel laser-arc hybrid welded joint | |
| Song et al. | Laser-arc hybrid welding of 25 mm high strength steel sections | |
| CN107931835A (en) | A kind of technique of the high-strength two-phase steel sheet of high-rate laser filler wire welding | |
| CN113941776B (en) | Thick plate ultrahigh-power double-beam laser-high-frequency pulse deep melting TIG (tungsten inert gas) hybrid welding method | |
| CN114850675B (en) | Laser welding method for 1000 MPa-grade cold-rolled high-strength steel hot-rolled substrate | |
| CN108296638B (en) | Method for improving strip steel welding quality of continuous galvanizing production line | |
| CN114535808B (en) | 590 MPa-level high-forming cold-rolled dual-phase steel and welding method for acid rolling process of 590 MPa-level high-forming cold-rolled dual-phase steel | |
| CN115673547A (en) | Method and product for welding hot-rolled medium-high carbon strip steel in pickling line | |
| CN105149810A (en) | Welding method for preventing strip breakage of weld joints of high-carbon-equivalent strip steel | |
| JP2002178176A (en) | Butt welding method and welded thin steel plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200103 |
|
| WD01 | Invention patent application deemed withdrawn after publication |