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CN107739998B - A kind of preparation method of cold rolled sheet - Google Patents

A kind of preparation method of cold rolled sheet Download PDF

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Publication number
CN107739998B
CN107739998B CN201710958307.6A CN201710958307A CN107739998B CN 107739998 B CN107739998 B CN 107739998B CN 201710958307 A CN201710958307 A CN 201710958307A CN 107739998 B CN107739998 B CN 107739998B
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rolling
temperature
cold
heating
rolled sheet
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CN107739998A (en
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王信才
何云华
裴丙红
肖桂华
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Pangang Group Jiangyou Changcheng Special Steel Co Ltd
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Pangang Group Jiangyou Changcheng Special Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0268—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment between cold rolling steps
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273—Final recrystallisation annealing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • 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
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • 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
    • C—CHEMISTRY; METALLURGY
    • 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
    • C—CHEMISTRY; METALLURGY
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • 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
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • C—CHEMISTRY; METALLURGY
    • 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
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

The present invention relates to a kind of preparation method of flat cold-rolled sheet, the low expansion superalloy flat cold-rolled sheet without Cr, Al can be produced, the especially surface of GH2909 high temperature alloy, size, performance etc. is controlled, and the GH2909 alloy flat cold-rolled sheet of ingredient qualification is produced.This method include by manufactured steel billet successively after hot rolling, once cold rolling, primary annealing, secondary cold-rolling, double annealing to obtain the final product；Wherein, the condition once annealed are as follows: heating temperature: 970 ± 10 DEG C；Heating time is calculated by 1.5min/mm+3~5min, air-cooled；The condition of the double annealing are as follows: heating temperature: 960 ± 10 DEG C；Heating time is calculated by 1.5min/mm+3~5min, air-cooled.This method can have outstanding low expansion and mechanical property under the premise of keeping (≤the 0.6mm) of very thin thickness.

Description

A kind of preparation method of flat cold-rolled sheet
Technical field
The present invention relates to metal material processing technical fields, in particular to a kind of preparation method of flat cold-rolled sheet.
Background technique
The development relationship of steel and iron industry the whole economic level of a national overall national strength and country, be national economy One of basic industry in construction.Steel material is in the industries such as national defense industry, mechanical industry, building, automobile, shipbuilding and household electrical appliances There is important application, is raw material indispensable in national manufacturing industry.In recent years, China has upgraded its industrial structure, is The development of steel industry provides the space for continuing development, and the development of the national economy needs more and more high-quality steel products.
Cold-rolled thin sheet is the base stock for producing many important equipments, is occupied an important position in steel and iron industry production. The production method of cold rolling can make the thinner of strip, moreover it is possible to improve the precision of rolling.The straightness of flat cold-rolled sheet is very high, tool The bright surface of standby cleaning, is easy to carry out coating processing, punching performance with higher, not timeliness and yield point is very low, because This flat cold-rolled sheet is received and is widely applied in automobile, building, bicycle, building materials, the printing industries such as metal bucket and coating steel plate.It is cold Roll thin plate and be increasingly becoming the indispensable raw produce of some industries, in turn, relevant industries it is booming also promote it is cold Roll the production of thin plate, simultaneously because lightweight, high-strength products concept it is universal, market is continuous to the quality requirement of flat cold-rolled sheet It improves.
Currently, the production technology of cold-rolled thin sheet is more complicated, process is more, and quality is highly susceptible to influence.By Raw material of the strip of hot rolling as production cold-reduced sheet, will be deformed by cold rolling, finally carry out the high temperature anneal simultaneously to it Carry out finishing.Every procedure may all change the surface quality of sheet band, increase the difficulty that analysis causes product defects reason. In the prior art, the coefficient of expansion of flat cold-rolled sheet is ideal not enough, and which has limited its uses in low bulk structural member.
In view of this, the present invention is specifically proposed.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation methods of flat cold-rolled sheet, high to produce the low bulk without Cr, Al Temperature alloy flat cold-rolled sheet.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
The present invention relates to a kind of preparation methods of flat cold-rolled sheet comprising will plant chemical component mass percent are as follows: and C≤ 0.06, Ni is 35.0~40.0, Co is 12.0~16.0, Nb is 4.3~5.2, Ti is 1.3~1.8, Si is 0.25~0.50, B ≤ 0.012, Mo≤0.20, Mn≤1.00, Al≤0.20, Cr≤1.00, Cu≤0.50, S≤0.015, P≤0.015, surplus are Steel billet made of the steel grade of Fe successively after hot rolling, once cold rolling, primary annealing, secondary cold-rolling, double annealing to obtain the final product；
Wherein, the condition once annealed are as follows: heating temperature: 970 ± 10 DEG C；Heating time by 1.5min/mm+3~ 5min is calculated, air-cooled；
The condition of the double annealing are as follows: heating temperature: 960 ± 10 DEG C；Heating time is based on 1.5min/mm+3~5min It calculates, it is air-cooled.
By adjusting, optimization and flat cold-rolled sheet preparation process is improved, the present invention keeps a kind of low expansion superalloy cold rolling thin The surface of plate, size, performance meet standard and user usage requirements, and it is thin to produce a kind of qualified low expansion superalloy cold rolling Panel products improve product quality, create more economic benefits for enterprise.Compared with prior art, the present invention is being kept very There is outstanding low expansion and mechanical property under the premise of (≤the 0.6mm) of thin thickness.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is 6 tons of induction furnace melting power curve of GH2909 alloy；
Fig. 2 is steel ingot Homogenization Treatments and forging technology curve；
Fig. 3 is blank heating curve among forging finished product.
Specific embodiment
The present invention relates to a kind of preparation methods of flat cold-rolled sheet comprising will plant chemical component mass percent are as follows: and C≤ 0.06, Ni is 35.0~40.0, Co is 12.0~16.0, Nb is 4.3~5.2, Ti is 1.3~1.8, Si is 0.25~0.50, B ≤ 0.012, Mo≤0.20, Mn≤1.00, Al≤0.20, Cr≤1.00, Cu≤0.50, S≤0.015, P≤0.015, surplus are Steel billet made of the steel grade of Fe successively after hot rolling, once cold rolling, primary annealing, secondary cold-rolling, double annealing to obtain the final product；
Wherein, the condition once annealed are as follows: heating temperature: 970 ± 10 DEG C；Heating time by 1.5min/mm+3~ 5min is calculated, air-cooled；
The condition of the double annealing are as follows: heating temperature: 960 ± 10 DEG C；Heating time is based on 1.5min/mm+3~5min It calculates, it is air-cooled.
Preferably, the preparation method of flat cold-rolled sheet as described above, the once cold rolling control cold rolling total deformation exist 30%~35%；The secondary cold-rolling control cold rolling total deformation is 30~35%.
Preferably, the preparation method of flat cold-rolled sheet as described above, the parameter of the hot rolling are as follows:
Famine rolls 1000 ± 10 DEG C of temperature, and 970 ± 10 DEG C of final rolling temperature, famine rolls 800 DEG C of finishing temperature >, finish rolling finishing temperature 800 DEG C of >；Heating time is calculated by 1.5min/mm+3-5min.Maximum pass deformation < 25%, last time deflection 20 ~25%.
Preferably, the preparation method of flat cold-rolled sheet as described above is further including that soda acid is washed and white after double annealing Change step.
Preferably, the preparation method of flat cold-rolled sheet as described above, the steel billet are melted by the steel grade by vacuum induction Refining and vacuum consumable refusion and smelting process route obtain steel ingot, will obtain steel billet after the steel ingot hammer cogging, rolling-cogging.
Preferably, the preparation method of flat cold-rolled sheet as described above, the hammer cogging include:
Single arm or the fire forging of quick forging machine or precise forging machine end: 980 DEG C~1020 DEG C of heating temperature, deformation temperature control exists 955 DEG C~980 DEG C, deflection >=40%；
It is furthermore preferred that heating temperature is 990 DEG C~1010 DEG C, deformation temperature control at 960 DEG C~975 DEG C, deflection >= 43%.
Preferably, the preparation method of flat cold-rolled sheet as described above, the rolling-cogging include:
Slab rolling is carried out after blank after hammer cogging is heated cogging in the continuous oven of milling train.
Preferably, the preparation method of flat cold-rolled sheet as described above, the condition of the heating cogging are as follows:
Charging temperature≤700 DEG C, 1110 ± 10 DEG C of heating temperature, heating time >=4h, soaking time 2h.
Preferably, the preparation method of flat cold-rolled sheet as described above, the slab rolling include: by slab through one fire of milling train Multi-pass rolls into the slab of required size, stops rolling temperature >=950 DEG C, passage maximum deformation quantity≤25%.
Preferably, the preparation method of flat cold-rolled sheet as described above, the chemical component mass percent of the steel grade are as follows: C ≤ 0.012, Ni is 37.8~38.8, Co is 12.8~13.8, Nb is 4.6~5.0, Ti is 1.4~1.7, Si be 0.35~ 0.47, B≤0.01, Mo≤0.20, Mn < 0.5, Al < 0.06, Cr < 0.2, Cu < 0.1, S≤0.015, P≤0.015；
It is furthermore preferred that the preparation method of flat cold-rolled sheet as described above, the chemical component mass percent of the steel grade are as follows: C≤0.012, Ni are 38.2~38.7, Co is 12.8~13.8, Nb is 4.6~5.0, Ti is 1.4~1.7, Si be 0.35~ 0.47, B≤0.01, Mo≤0.20, Mn < 0.5, Al < 0.06, Cr < 0.2, Cu < 0.1, S≤0.015, P≤0.015.
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is It can be with conventional products that are commercially available.
Embodiment
1 scope of application
GH909 alloy is a kind of Fe-Ni-Co base age-hardening type low bulk to grow up on the basis of GH907 alloy High temperature alloy, compared with GH907 alloy, the stress of alloy promotes grain boundary oxidation brittleness (SAGBO) drag and creep rupture life to obtain It further increases, but thermal expansion coefficient and GH903, GH907 are essentially identical, performance can meet the following turbine hair of three generations substantially The demand of motivation, it has low thermal expansion coefficient, nearly constant elasticity modulus and good comprehensive mechanical property, answers extensively For the clearance component between rotatable parts and stationary parts, gap control technology is realized, it is energy saving, consumption is reduced, is improved Motor power, but since alloy is free of Cr, the disadvantage is that oxidation drag and corrosion resistance are very low, especially anti-oxidant problem, 650 DEG C or more GH909 alloys cannot completely it is anti-oxidant.
GH2909 alloy melting point is about 1336~1384 DEG C, and specific gravity is about 8.26g/cm3。
2 technical conditions
Q/S15.2206-2011 etc.
3 process routes
Vacuum induction+vacuum consumable
4 technical requirements
4.1 vacuum induction melting techniques
4.1.1 6 tons of vacuum induction melting technique
4.1.1.1 equipment requirement:
Wind, water, electricity, vacuum system and each mechanical equipment work well.
4.1.1.2 melting condition:
New crucible smelting needs Fe to wash 2 furnaces, and the second furnace iron washes that (pure 00), centre, which smelts, needs iron to wash (pure 00), 1 furnace with smart steel.
4.1.1.3 raw material
Furnace charge by this steel return (≤50%), smart steel (CT1-1), 1#Ni, J-Co, monocrystalline silicon, graphite electrode, J-Nb, Sponge Ti and Fe-B composition.Alloy material by raw material incoming inspection regulation into must carry out an acceptance inspection after factory, the surface of raw material, ruler Very little, lumpiness requires to meet 6 tons of vaccum sensitive stove Elementary Procedures.
4.1.1.4 charge weight and electrode specification
Charge weight: 3200kg or 6400kg；Electrode:Zhi HuoBranch.
4.1.1.5GH2909 alloy composition is shown in Table 1.
GH2909 alloy composition ▲ (wt%) table 1
4.1.1.6 charging
4.1.1.6.1 forehearth Fe, which is washed, guarantees that CT1-1 wholeization is complete, and turns over net molten steel, avoids removing material in furnace.
4.1.1.6.2 it is all enter furnace raw material through direct labor, specific responsibility inspection personnel by charger sheet inspection, weighing, confirmation Kind, quantity it is errorless and sign after can enter furnace.
4.1.1.6.3Ni, Co and smart steel (CT1-1) are once packed into crucible.C, Ti, Nb, Fe-B, Si are bent by smelting process Line is added.
4.1.1.7 smelting process curve, such as Fig. 1.
4.1.1.8 smelting main points:
Refining temperature requires precise control, guarantees de- N effect, diligent to survey gentle agitation.Add ten minutes sampling analyses after Ti, adds Reinforce stirring when material and sampling, controls tapping temperature.
4.1.1.9 casting
4.1.1.9.1 it is poured and carries out under vacuum, control poring rate and filling quality.
4.1.1.9.2 ingot mould must be scalded with molten steel, be cleaned rustless.
4.1.1.9.3 it is more than hour must to heat 4 for pans, and surface temperature must reach 1000 DEG C.
4.1.1.9.4 furnace cool time, which is greater than the side 1.5h, after being poured can break sky, take off ingot after the cold 2h of mould.
4.2 vacuum consumable remeltings
4.2.1 melting condition
Equipment must be checked before melting, confirmation equipment is good, vacuum degree of cold state < 0.67Pa, gas leakage degree < The side 0.67Pa/min can smelt.
4.2.2 consutrode
It cuts end to end only, surface must be clean through abrasion wheel grinding, if shrinkage cavity is towards lower from expendable weight after the bad cleaning that need to strip off the skin in surface It is molten.
4.2.3 consumable technique
4.2.3.1 the side 0.67Pa vacuum degree < can be to the electric starting the arc.
4.2.3.2 crystallizer:
4.2.3.3 electric power system
Ingot, electric current 7000A or so, 22~24V of voltage or so.
Electric current is subject to molten bath to the minimum current on side.Melting is carried out by electrical force profiles.
It carries out rushing helium gas cooling, pressure 600Pa in reflow process.
4.2.3.4 certain it is noted that filling quality, gradually decreases electric current.Each stage keeps certain time, can not be once Low current is dropped to, shrinks molten bath as far as possible, is mentioned in shrinkage cavity, lumber recovery is improved.
4.2.4 filling process: starting to fill in electrode 200 ± 10kg of residue, and filling is with reference to technique and steps are as follows:
Step Electric current (A) Voltage (V) Retention time (min)
1 6000 23 3
2 5500 22.8 5
3 4500 22.6 8
4 4000 22.5 10
5 3500 22.0 5-10
6 2000 21.7 5-10
7 2000 20.0 5-10
4.3. Homogenization Treatments
Homogenization Treatments are carried out to steel ingot.Pay attention to steel ingot strict temperature control in Homogenization Treatments, there can be no temperature Fluctuate the warm phenomenon of excessive and race.Homogenization Treatments system is shown in that Fig. 2, steel ingot are heated in bell furnace.
4.4. forging technology
4.4.1 steel ingot cogging forging is forged fastly in 2000t or 4500t carries out.
4.4.2 heating cycle
Heating cycle curve, such as Fig. 2:
4.4.3 forging technology
Cogging forging: generalling use multiple upsetting pull technique, and specific deformation scheme view trimmed size determines；
4.4.3.1 finish forge unit heating process
The following are intermediate base heating curves, when production, can be according to intermediate base size appropriate adjustment soaking time, with blank temperature Degree uniformly arrives subject to temperature.
Forging is become a useful person: Single arm or the fire forging of quick forging machine or precise forging machine end: 980~1020 DEG C of heating temperature, being seen Fig. 3, is become Shape temperature is controlled at 955~980 DEG C, and deflection >=40% can not melt down empty burning.
4.4.4 for rolling blank, cogging can be carried out in Single arm.
4.5. rolling mill practice
4.5.1 heating cycle
Blank heats in the continuous oven of milling train.Charging temperature≤700 DEG C, 1110 ± 10 DEG C of heating temperature, heating time >=4h, soaking time 2h.
4.5.2 slab rolling
Slab rolls into the slab of required size through the fiery multi-pass of milling train one, stops rolling temperature >=950 DEG C, passage maximum deformation quantity ≤ 25%.It flows down after blank surface whole peeling, and takes low power end to end as required.
4.5.3 billet rolling
Square billet rolls into the bar or blank of required size through the fiery multi-pass of milling train one.
4.6. thin plate technique
4.6.1 hot rolling
Famine rolls 1000 ± 10 DEG C of temperature, and 970 ± 10 DEG C of final rolling temperature, famine rolls 800 DEG C of finishing temperature >, finish rolling finishing temperature 800 DEG C of >.Heating time is calculated by 1.5min/mm+3-5min.Maximum pass deformation < 25%, last time deflection 20 ~25%.
4.6.2 cold rolling
Semi-finished product total deformation 30~35%, finished product total deformation 25~30%.
4.6.3 annealing
Annealing carries out in the furnace of roller bottom.
4.6.3.1 semi-finished product
Heating temperature: 970 ± 10 DEG C.
Heating time is calculated by 1.5min/mm+3~5min, air-cooled.
4.6.3.2 finished product
960 ± 10 DEG C of heating temperature.940 ± 10 DEG C of finished products temperature.
Heating time is calculated by 1.5min/mm+3~5min, air-cooled.
4.6.4 soda acid wash, albefaction
It is executed by iron-base superalloy technique.
4.6.5 finishing, inspection, flaw detection, packaging, storage.
4.7. unaccomplished matter is executed by basic operation regulation.
Experimental example
According to cold prepared by the GB/T 4339-2008 metal material thermal expansion character measurement method of parameters detection present invention Roll the room temperature~600 DEG C average linear expansion coefficient of thin plate.Size of sample isDetection is (moral) using equipment NETZSCH DIL 203SE dilatometer.Testing result is as shown in the table:
0.6mm thickness cold rolled sheet end properties are detected simultaneously, as a result as shown in the table:
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent Present invention has been described in detail with reference to the aforementioned embodiments for pipe, but those skilled in the art should understand that: its It is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features It is equivalently replaced；And these are modified or replaceed, various embodiments of the present invention skill that it does not separate the essence of the corresponding technical solution The range of art scheme.

Claims (2)

1.一种冷轧薄板的制备方法，其包括将化学成分质量百分比为：C≤0.012、Ni为37.8～38.8、Co为12.8～13.8、Nb为4.6～5.0、Ti为1.4～1.7、Si为0.35～0.47、B≤0.01、Mo≤0.20、Mn＜0.5、Al＜0.06、Cr＜0.2、Cu＜0.1、S≤0.015、P≤0.015，余量为Fe的钢种制成的钢坯依次经过热轧、一次冷轧、一次退火、二次冷轧、二次退火后即得；所述钢坯由所述钢种经过真空感应熔炼及真空自耗重熔冶炼工艺路线获得钢锭，将所述钢锭锻造开坯、轧制开坯后得到钢坯；1. A method for preparing a cold-rolled sheet, comprising: chemical composition mass percentages as follows: C≤0.012, Ni is 37.8-38.8, Co is 12.8-13.8, Nb is 4.6-5.0, Ti is 1.4-1.7, and Si is 0.35～0.47, B≤0.01, Mo≤0.20, Mn<0.5, Al<0.06, Cr<0.2, Cu<0.1, S≤0.015, P≤0.015, and the steel billets made of steel with the balance of Fe are successively heated. After rolling, primary cold rolling, primary annealing, secondary cold rolling, and secondary annealing; the steel billet is obtained from the steel grade through vacuum induction melting and vacuum self-consumption remelting smelting process routes to obtain steel ingots, and the steel ingots are forged. Billet is obtained after billeting and rolling; 所述锻造开坯包括：The forging blanking includes: 电液锤或快锻机或精锻机末火锻造：加热温度980℃～1020℃，变形温度控制在955℃～980℃，变形量≥40％；Electro-hydraulic hammer or fast forging machine or precision forging machine for final fire forging: the heating temperature is 980℃～1020℃, the deformation temperature is controlled at 955℃～980℃, and the deformation amount is ≥40%; 所述轧制开坯包括：The rolling blanking includes: 将锻造开坯后的坯料在轧机的连续炉中加热开坯后进行板坯轧制；The billet after forging and billeting is heated and billeted in the continuous furnace of the rolling mill, and then slab rolling is performed; 所述加热开坯的条件为：The conditions for the heating and blanking are: 装炉温度≤700℃，加热温度1110±10℃，加热时间≥4h，保温时间2h；Furnace loading temperature≤700℃, heating temperature 1110±10℃, heating time≥4h, holding time 2h; 所述板坯轧制包括：将板坯经轧机一火多道次轧成所需尺寸的板坯，停轧温度≥950℃，道次最大变形量≤25％；The slab rolling includes: rolling the slab through a rolling mill for multiple passes into a slab of the required size, the stop rolling temperature is ≥950°C, and the maximum deformation amount of the pass is ≤25%; 所述热轧的参数为：The hot rolling parameters are: 荒轧温度1000±10℃，精轧温度970±10℃，荒轧终轧温度＞800℃，精轧终轧温度＞800℃；加热时间按1.5min/mm+3-5min计算；最大道次变形量＜25％，最后一次变形量20～25％；The blank rolling temperature is 1000±10°C, the finishing rolling temperature is 970±10°C, the blank rolling final rolling temperature is more than 800 °C, and the finishing rolling final rolling temperature is more than 800 °C; the heating time is calculated according to 1.5min/mm+3-5min; the maximum number of passes The deformation amount is less than 25%, and the last deformation amount is 20-25%; 所述一次冷轧控制冷轧总变形量在30％～35％；所述二次冷轧控制冷轧总变形量在30～35％；The primary cold rolling controls the total deformation of cold rolling to be 30% to 35%; the secondary cold rolling controls the total deformation of cold rolling to be 30 to 35%; 其中，所述一次退火的条件为：加热温度：970±10℃；加热时间按1.5min/mm+3～5min计算，空冷；Wherein, the conditions of the primary annealing are: heating temperature: 970±10℃; heating time is calculated as 1.5min/mm+3～5min, air cooling; 所述二次退火的条件为：加热温度：960±10℃；加热时间按1.5min/mm+3～5min计算，空冷。The conditions of the secondary annealing are: heating temperature: 960±10° C.; heating time is calculated as 1.5min/mm+3-5min, and air cooling. 2.根据权利要求1所述的冷轧薄板的制备方法，其特征在于，在经过二次退火后还包括酸碱洗及白化步骤。2 . The method for preparing a cold-rolled sheet according to claim 1 , characterized in that, after secondary annealing, it further comprises acid-base washing and whitening steps. 3 .
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