CN110284134A - A kind of laser cladding repair technique of rotary cutter edge - Google Patents
A kind of laser cladding repair technique of rotary cutter edge Download PDFInfo
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- CN110284134A CN110284134A CN201910537084.5A CN201910537084A CN110284134A CN 110284134 A CN110284134 A CN 110284134A CN 201910537084 A CN201910537084 A CN 201910537084A CN 110284134 A CN110284134 A CN 110284134A
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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Abstract
The present invention provides a kind of laser cladding repair techniques of rotary cutter edge, for solving the technical issues of can not effectively repairing rotary cutter edge in the prior art, comprising: step 1: stock: preparing repairing alloy powder and reinforced alloys powder；Step 2: cutting edge surface preparation: step 2.1) cleans the cutting edge surface；The dry cutting edge surface of step 2.2)；Step 3: laser melting coating repair layer: the repairing alloy powder is used, forms the repair layer in the restoring area laser melting coating；Step 4: the strengthening region machining strengthening region: is machined on the cutting edge surface and/or the restoring area；Step 5: laser melting coating strengthening layer: the reinforced alloys powder is used, forms the strengthening layer in the strengthening region laser melting coating.Effectively reparation rotary cutter edge can be realized by implementing technical solution of the present invention, rotary cutter edge service life be improved, to reduce the technical effect of production line operating cost.
Description
Technical field
The present invention relates to rotary cutter edges to repair field, in particular to a kind of laser cladding repair technique of rotary cutter edge.
Background technique
Laser melting coating is that a kind of acted on using high energy laser beam is coated in metal surface in advance or is sent into using synchronous
On powder, it is allowed to quickly heat and quickly solidifies the method for forming good metallurgical bonding, with traditional surface peening and reparation
Technology is compared, and laser melting coating has the advantages that precision is high, high-efficient, formation metallurgical bonding intensity is high, can satisfy some parts
It is required that the requirement of particulate metal component of high-strength, high-anti-friction.
Rotary cutter edge is iron and steel enterprise's cold rolling continuously automatically or semi-automatically on production line, produce high quality steel edge portion and
The critical component of high-precision strip width size.Rotary cutter edge generally uses H13 steel alloy to make, and H13 is a kind of electroslag remelting
Steel, and the tough hot die steel having both being widely used in the world.It is high-precision in order to obtain in flat cold-rolled sheet production
Steel edge portion and high-precision strip width size need to carry out trimming operation to steel band.During continuous trimming, H13 circle
Disk cutting edge cutting edge can generate heat fatigue and tipping under the long duration of action of shear force with one's hands behind one's back of steel plate.It is usually with outer after local chipping
Circle grinding machine, until cutting edge reparation.The original size of rotary cutter edge is ground to ￠ 560mm for ￠ 600mm and is not just available
And scrap, and the price of rotary cutter edge of a piece of H13 weight in 40kg is at 10000 yuan or so, it is expensive.For one 300
To expend 12000 rotary cutter edges within 1 year for ten thousand tons of cold rolling line, i.e. the cost only on rotary cutter edge just reaches 1.2 hundred million,
Therefore very great to the reparation of rotary cutter edge and reinforcing meaning.Traditionally, enterprise can be used using traditional electric welding technology reparation
H13 mold steel electrode or U.S. M480 mold steel electrode as rotary cutter edge parent metal ingredient mend disk rotary cutter edge
Weldering, but conventional electric welding reparation, because its welding process crystal grain is coarse, the Wei Shi body tissue of heat affected area seriously affects heap
The mechanical property of layer, so as to cause repair welding cutting edge online use when chipping quickly, and once reach and scrap size, can not
It is repaired using conventional electric welding.So most enterprises use after scrapping size, just it is not repeated to utilize.
Therefore market needs one kind and can effectively repair rotary cutter edge, rotary cutter edge service life is improved, to reduce production
The rotary cutter edge renovation technique of line operating cost.
Summary of the invention
In order to solve the above-mentioned technical problem, it is disclosed in the present invention, the technical scheme is that be implemented:
A kind of laser cladding repair technique of rotary cutter edge characterized by comprising step 1: stock: prepare to repair and close
Bronze end and reinforced alloys powder；Step 2: cutting edge surface preparation: step 2.1) cleans the cutting edge surface；Step 2.2)
The dry cutting edge surface；Step 3: laser melting coating repair layer: using the repairing alloy powder, swashs in the restoring area
Light cladding forms the repair layer；Step 4: machining strengthening region: in the cutting edge surface and/or the restoring area
On be machined into the strengthening region；Step 5: laser melting coating strengthening layer: using the reinforced alloys powder, described strong
Change region laser melting coating and forms the strengthening layer.
Preferably, in step 3, the technique of laser melting coating is multiple tracks cladding.
Preferably, the reinforced alloys powder includes following element and weight percent content: C 0.3-1.5%, Cr
4.5-11%, Si 1.2-3.5%, Ni 15-29%, B 1.5-5%, surplus Fe.
Preferably, the repairing alloy powder includes following element and weight percent content: C 0.15-2.75%, Si
0.05-3.5%, Mn 0.05-2.4%, P 0-0.75%, S 0-0.65%, Cr 0.5-11.5%, W 0-10.5%, Mo
0.25-8.75%, Ni 0-6.5%, V 0-3.65%, Al 0-1.5%, Co 0-5%, surplus Fe.
Preferably, step 2 further include: step 2.3) is machined the removal cutting edge to the cutting edge surface inspection
Surface has the fatigue layer of crackle.
Preferably, the width range of the repair layer is [0.5mm, 60mm], and thickness range is [0.3mm, 40mm].
Preferably, the width range of the strengthening layer is [1mm, 10mm], and thickness range is [0.3mm, 5mm].
Preferably, in step 3 and/or step 5, the process of the cooling of laser melting coating carries out in incubator, cooling speed
Degree is not more than 150 DEG C/h.
It preferably, further include step 6, repair layer described in mechanical grinding and/or the strengthening layer.
Implement technical solution of the present invention can solve can not effectively to repair in the prior art rotary cutter edge so as to cause skill
Art problem；Implement technical solution of the present invention, rotary cutter edge is repaired by laser melting and coating technique, it can be achieved that extending disk
The service life of cutting edge improves resource utilization, reduces the technical effect of production line production cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
A kind of embodiment of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
The process flow diagram of the position Fig. 1 a specific embodiment of the invention 1.
Fig. 2 is the process flow diagram of a specific embodiment of the invention 2.
Fig. 3 is a kind of industrial flow schematic diagram of preferred embodiment of step two of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
In a specific embodiment of the invention 1, as shown in Figure 1,3, a kind of laser cladding repair technique of rotary cutter edge,
It is characterised by comprising: step 1: stock: preparing repairing alloy powder and reinforced alloys powder；Step 2: cutting edge surface is pre-
Processing: step 2.1) cleans the cutting edge surface；The dry cutting edge surface of step 2.2)；Step 3: laser melting coating repair layer:
Using repairing alloy powder, repair layer is formed in restoring area laser melting coating；Step 4: machining strengthening region: in cutting edge
Strengthening region is machined on surface and/or restoring area；Step 5: laser melting coating strengthening layer: using reinforced alloys powder,
In strengthening region, laser melting coating forms strengthening layer.
Specific embodiment 1 is directed to the rotary cutter edge reparation of local chipping；In step 1, repairing alloy powder belongs to one
Carbon alloy powder in kind, reinforced alloys powder belong to a kind of high carbon alloy powder, repairing alloy powder be used for rotary cutter edge into
Row is repaired, and reinforced alloys powder is for strengthening rotary cutter edge；Cleaning method used in step 2 is ultrasonic wave
Ablution, used cleaning agent are acetone, and acetone is very suitable for the application in rotary cutter edge as a kind of good solvent
The cleaning of generated various impurity in scene, during ultrasonic cleaning, the strong cavitation of ultrasonic wave generation
And vibration falls off the dirt removing on rotary cutter edge surface, emulsifies the dirt of cutting grease property, the acetone for reusing flowing will
Through falling off but still to float on wash dirt on rotary cutter edge surface clean, then rotary cutter edge immerses acetone, will be floated using ultrasonic wave
Dirt at each side of workpiece, angle and hole cleans up, thus play the role of degreasing, it is finally below using 60 DEG C
Hot wind makes the rapid draing of rotary cutter edge surface；In step 3, high-temperature heating fusing repairing alloy powder is carried out using high power laser light
End, at rotary cutter edge peripheral cutting edge the cladding layer of both sides each cladding one slice width 6mm, thick 2mm as repair layer, make it is repaired after
Rotary cutter edge and the outer circle of the non-chipping of cutting edge cutting edge, plane at flush, which can be adjusted according to the actual situation
It is whole；In step 4, using cutting tool, the wide 4mm of turning, the step of deep 1.5mm add as machinery at cutting edge cutting edge plane
Work strengthening region；Step 5 is swashed using high power laser light in the machining strengthening region that rotary cutter edge cutting edge plane turning goes out
Light cladding and hardening alloy powder, the wide 4mm of cladding, thick 2mm strengthening layer, the strengthening layer size can be adjusted according to the actual situation,
Strengthening layer is formed for strengthening in the machining strengthening region；Through the above steps, it may be implemented to have rotary cutter edge
Effect is repaired, and strengthens the intensity of rotary cutter edge, to realize the service life for extending rotary cutter edge, reduces production line operation
The effect of cost.
In a preferred embodiment, as shown in Fig. 2, in step 3, the technique of laser melting coating is multiple tracks cladding.
In the preferred embodiment, in cladding operation process, if encountered, cladding surface is larger, and the gradient is biggish
Handling situations, the metal after thawing is easy sagging seam deformation after leading to welding, and then repair is caused to fail, and if
Using multilayer multiple tracks cladding operation, the multiple welding beads of cladding can then overcome larger on cladding surface to complete weld seam, and the gradient is larger
Operating condition under metal be easy sagging drawback, to improve welding quality and efficiency.
In a preferred embodiment, reinforced alloys powder includes following element and weight percent content: C
0.3-1.5%, Cr 4.5-11%, Si 1.2-3.5%, Ni 15-29%, B 1.5-5%, surplus Fe.
In the preferred embodiment, reinforced alloys powder in laser cladding process for strengthening rotary cutter edge；?
In laser cladding process, reinforced alloys powder becomes the tiny cladding layer of crystal grain, such crystallization belongs to cryptocrystalline martensite group
It knits, an order of magnitude lower than the metal structure crystal grain of conventional metallurgical chemical reaction plays the role of solution strengthening, enhances circle
The fine grain intensity of disk cutting edge, to improve the overall structural strength of rotary cutter edge.
In a preferred embodiment, repairing alloy powder includes following element and weight percent content: C
0.15-2.75%, Si 0.05-3.5%, Mn 0.05-2.4%, P 0-0.75%, S 0-0.65%, Cr 0.5-11.5%, W
0-10.5%, Mo 0.25-8.75%, Ni 0-6.5%, V 0-3.65%, Al 0-1.5%, Co 0-5%, surplus Fe.
In this kind of preferred embodiment, it is however generally that, rotary cutter edge on the market is made using H13 material, if making
With high-carbon high-alloy powder, in high temperature cladding operation process, the welding stress of accumulation has can be rotary cutter edge entirety drawing crack
Risk, and as repair materials, welding stress is relative to high-carbon high-alloy powder if using H13 material identical with rotary cutter edge
For end, welding stress will be greatly reduced, and effectively avoid rotary cutter edge drawing crack brought by high carbon alloy powder
Risk.
In a preferred embodiment, as shown in Figure 2,3, step 2 further include: step 2.3) visits cutting edge surface
Wound, and it is machined the fatigue layer that removal cutting edge surface has crackle.
In the preferred embodiment, detected a flaw using bleeding agent to cutting edge surface, fatty alcohol can be used in bleeding agent
Polyoxyethylene ether has good penetrating power as a kind of bleeding agent fatty alcohol polyoxyethylene ether, if it exists crackle, fatigue
Layer, it is repaired using angle grinder, the step for can preferably reduce due to long-time service caused by naked eyes can not know
Because of probability that the components caused by metal fatigue are damaged caused by other subtle damage.
In a preferred embodiment, the width range of repair layer is [0.5mm, 60mm], and thickness range is
[0.3mm,40mm]。
In the preferred embodiment, in the cladding process of the repair layer, the thickness of repair layer is unsuitable excessively thin, also not
It is preferably blocked up, it, may be excessively thin because of repair layer in laser cladding process in the case where thickness is lower than 0.3mm if excessively thin
Cause repair layer that can not shape in cooling procedure, if blocked up, general threshold value be higher than 40mm, then can because of thickness later and
On the one hand the waste for leading to resource, on the other hand causes to be not easy to polish during sanding and polishing, influences polishing process
Efficiency；The width of repair layer is unsuitable narrow, also unsuitable wide, if wide, it is sagging to may result in the metal in cladding operation,
If fruit is narrow, cladding operation may be influenced and obtain operation effectiveness, repairing effect is caused to be deteriorated.
In a preferred embodiment, the width range of strengthening layer be [1mm, 10mm], thickness range be [0.3mm,
5mm]。
In the preferred embodiment, in the cladding process of the strengthening layer, the thickness of strengthening layer is unsuitable excessively thin, also not
Preferably blocked up, if excessively thin, general threshold value is that may cause because of repair layer is excessively thin in laser cladding process lower than 0.3mm
Repair layer can not shape in cooling procedure, if blocked up, general threshold value be higher than 5mm, then can because of thickness later and a side
Face leads to the waste of resource, on the other hand causes to be not easy to polish during sanding and polishing, influences the efficiency of polishing process.
The width of repair layer is unsuitable narrow, also unsuitable wide, if wide, it is sagging to may result in the metal in cladding operation, if fruit
It is narrow, then it may influence cladding operation and obtain operation effectiveness, repairing effect is caused to be deteriorated.
In a preferred embodiment, as shown in Fig. 2, in step 3 and/or step 5, the cooling of laser melting coating
Process carries out in incubator, and cooling velocity is not more than 150 DEG C/h.
In this kind of preferred embodiment, cooling must prevent welding stress handle in cladding process using heat preservation slow cooling
Cladding layer and cutting edge matrix matrix drawing crack, if its cooling velocity is more than 150 DEG C/h, it is possible to cause welding stress cladding layer and
Cutting edge matrix matrix drawing crack, therefore the cooling procedure of the cladding of laser in incubator and must should limit cooling velocity and exist
150 DEG C/h or less.
In a preferred embodiment, as shown in Fig. 2, further including 6 step 6, mechanical grinding repair layer and/or strong
Change layer.
In the preferred embodiment, machine is carried out to repair layer and/or strengthening layer using surface grinding machine and cylindrical grinder
Tool polishing, the degree of roughness of repair layer and/or strengthening layer can be reduced using mechanical grinding, to obtain smooth disk
Cutting edge surface, and then improve the using effect of rotary cutter edge.
Embodiment 2
In a specific embodiment of the invention 2, as shown in Fig. 2, unlike the first embodiment, specific embodiment 2 with
The difference of specific embodiment 1 is that specific embodiment 2 is directed to the reparation for the rotary cutter edge scrapped；In step 3,
High-temperature heating fusing repairing alloy powder is carried out using high power laser light, continuous cladding thickness 22mm, wide at rotary cutter edge outer circle
The cladding layer of 40mm flushes at rotary cutter edge and the outer circle of the non-chipping of cutting edge cutting edge, plane, which can basis
Actual conditions are adjusted；In step 4, using cutting tool, turning goes out width 20mm, deep 1.5mm at cutting edge cutting edge plane
Step；In step 5, swashed using high power laser light in the machining strengthening region that rotary cutter edge cutting edge plane turning goes out
The light cladding and hardening wide 20mm of alloy powder cladding, with a thickness of 2mm strengthening layer, the size of the strengthening layer can carry out according to the actual situation
Adjustment；2 each step by specific embodiment, can playing Fei Weibao, by the rotary cutter edge scrapped re-use
Technical effect, significantly sung the service life of rotary cutter edge, reduced the maintenance cost of production line.
It should be pointed out that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in guarantor of the invention
Within the scope of shield.
Claims (9)
1. a kind of laser cladding repair technique of rotary cutter edge characterized by comprising
Step 1: stock: prepare repairing alloy powder and reinforced alloys powder；
Step 2: cutting edge surface preparation:
Step 2.1) cleans the cutting edge surface；
The dry cutting edge surface of step 2.2)；
Step 3: laser melting coating repair layer: using the repairing alloy powder, is formed in the restoring area laser melting coating described
Repair layer；
Step 4: it machining strengthening region: is machined on the cutting edge surface and/or the restoring area described strong
Change region；
Step 5: laser melting coating strengthening layer: using the reinforced alloys powder, is formed in the strengthening region laser melting coating described
Strengthening layer.
2. a kind of laser cladding repair technique of rotary cutter edge according to claim 1, which is characterized in that in step 3,
The technique of laser melting coating is multiple tracks cladding.
3. a kind of laser cladding repair technique of rotary cutter edge according to claim 2, which is characterized in that the reinforcing is closed
Bronze end includes following element and weight percent content: C 0.3-1.5%, Cr 4.5-11%, Si 1.2-3.5%, Ni
15-29%, B 1.5-5%, surplus Fe.
4. a kind of laser cladding repair technique of rotary cutter edge according to claim 3, which is characterized in that the reparation is closed
Bronze end include following element and weight percent content: C 0.15-2.75%, Si 0.05-3.5%, Mn 0.05-2.4%,
P 0-0.75%, S 0-0.65%, Cr 0.5-11.5%, W 0-10.5%, Mo 0.25-8.75%, Ni 0-6.5%, V 0-
3.65%, Al 0-1.5%, Co 0-5%, surplus Fe.
5. a kind of laser cladding repair technique of rotary cutter edge according to claim 4, which is characterized in that step 2 is also wrapped
Include: step 2.3) is machined to the cutting edge surface inspection and removes the fatigue layer that the cutting edge surface has crackle.
6. according to a kind of laser cladding repair technique of rotary cutter edge described in claim 5, which is characterized in that the repair layer
Width range is [0.5mm, 60mm], and thickness range is [0.3mm, 40mm].
7. a kind of laser cladding repair technique of rotary cutter edge according to claim 6, which is characterized in that the strengthening layer
Width range be [1mm, 10mm], thickness range be [0.3mm, 5mm].
8. a kind of laser cladding repair technique of rotary cutter edge according to claim 7, which is characterized in that step 3 and/
Or in step 5, the process of the cooling of laser melting coating carries out in incubator, and cooling velocity is not more than 150 DEG C/h.
9. a kind of laser cladding repair technique of rotary cutter edge according to claim 8, which is characterized in that further include step
Six, repair layer and/or the strengthening layer described in mechanical grinding.
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| CN201910537084.5A CN110284134B (en) | 2019-06-20 | 2019-06-20 | Laser cladding repair process for disc shear blade |
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| CN201910537084.5A CN110284134B (en) | 2019-06-20 | 2019-06-20 | Laser cladding repair process for disc shear blade |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512207A (en) * | 2019-09-25 | 2019-11-29 | 沈阳大陆激光工程技术有限公司 | Laser manufactures and remanufactures copper plate of crystallizer composite powder material and its manufacturing method |
| CN113151818A (en) * | 2021-02-08 | 2021-07-23 | 天津辉锐激光科技有限公司 | Laser cladding surface strengthening layer preparation process and novel ball valve |
| CN114540807A (en) * | 2020-11-25 | 2022-05-27 | 宝武装备智能科技有限公司 | Method for repairing and PVD surface strengthening of cutting edge of disc shear blade |
| WO2022109658A1 (en) * | 2020-11-27 | 2022-06-02 | Tang, Yuankui | A new wear resistant steel with high hardness and good toughness which keeps hardened after hard facing and tungsten carbide tile brazing |
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