CN107739998A - A kind of preparation method of flat cold-rolled sheet - Google Patents
A kind of preparation method of flat cold-rolled sheet Download PDFInfo
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- CN107739998A CN107739998A CN201710958307.6A CN201710958307A CN107739998A CN 107739998 A CN107739998 A CN 107739998A CN 201710958307 A CN201710958307 A CN 201710958307A CN 107739998 A CN107739998 A CN 107739998A
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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
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
- C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
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- 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
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- 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
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- 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
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- 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
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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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
- C22C38/44—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
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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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- 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
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- 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
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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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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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Abstract
The present invention relates to a kind of preparation method of flat cold-rolled sheet, can produce the low expansion superalloy flat cold-rolled sheet without Cr, Al, and the especially surface of GH2909 high temperature alloys, size, performance etc. is controlled, and produces the qualified GH2909 alloy flat cold-rolled sheets of composition.This method is included manufactured steel billet successively by hot rolling, once cold rolling, once produce after annealing, secondary cold-rolling, double annealing；Wherein, the condition once annealed is：Heating-up temperature：970±10℃；Heat time is calculated by 1.5min/mm+3~5min, air cooling；The condition of the double annealing is：Heating-up temperature：960±10℃；Heat time is calculated by 1.5min/mm+3~5min, air cooling.This method can have outstanding low expansion and mechanical property on the premise of (≤the 0.6mm) of very thin thickness is kept.
Description
Technical field
The present invention relates to metal material processing technical field, in particular to a kind of preparation method of flat cold-rolled sheet.
Background technology
The development relationship of steel and iron industry the economic level of a national overall national strength and country's entirety, is national economy
One of basic industry in construction.Ferrous materials are in the industries such as national defense industry, mechanical industry, building, automobile, shipbuilding and household electrical appliances
There is important application, be 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 increasing high-quality steel products.
Cold-rolled thin sheet is the base stock for producing many visual plants, occupies critical role in steel and iron industry production.
The mode of production of cold rolling can make the thickness of strip thinner, moreover it is possible to improve the precision of rolling.The glacing flatness of flat cold-rolled sheet is very high, tool
The bright surface of standby cleaning, easily carries out coating processing, has higher punching performance, 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 industry 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
The production of thin plate is rolled, simultaneously because lightweight, the popularization of high-strength products concept, market are continuous to the quality requirement of flat cold-rolled sheet
Improve.
At present, the production technology of cold-rolled thin sheet is more complicated, and process is more, and its 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.The surface quality of sheet band may all be changed per procedure, increase the difficulty that analysis causes product defects reason.
In the prior art, the coefficient of expansion of flat cold-rolled sheet is preferable not enough, and which has limited its use in low bulk structural member.
In view of this, it is special to propose the present invention.
The content of the invention
It is high to produce the low bulk without Cr, Al it is an object of the invention to provide a kind of preparation method of flat cold-rolled sheet
Temperature alloy flat cold-rolled sheet.
In order to realize the above-mentioned purpose of the present invention, spy uses following technical scheme：
The present invention relates to a kind of preparation method of flat cold-rolled sheet, it include be by kind chemical composition mass percent：C≤
0.06th, 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 Fe steel grade is successively by hot rolling, once cold rolling, once produce after annealing, secondary cold-rolling, double annealing；
Wherein, the condition once annealed is：Heating-up temperature：970±10℃；Heat time by 1.5min/mm+3~
5min is calculated, air cooling；
The condition of the double annealing is：Heating-up temperature：960±10℃；Heat time is based on 1.5min/mm+3~5min
Calculate, air cooling.
By adjusting, optimizing and improving flat cold-rolled sheet preparation technology, the present invention makes a kind of low expansion superalloy cold rolling thin
The surface of plate, size, performance meet standard and user's requirement, and it is thin to produce a kind of qualified low expansion superalloy cold rolling
Panel products, product quality is improved, more economic benefits are created for enterprise.Compared with prior art, the present invention is being kept very
There is outstanding low expansion and mechanical property on the premise of (≤the 0.6mm) of thin thickness.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is 6 tons of induction furnace melting power curve of GH2909 alloys；
Fig. 2 is steel ingot Homogenization Treatments and forging technology curve；
Fig. 3 is blank heating curve among forging finished product.
Embodiment
The present invention relates to a kind of preparation method of flat cold-rolled sheet, it include be by kind chemical composition mass percent：C≤
0.06th, 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 Fe steel grade is successively by hot rolling, once cold rolling, once produce after annealing, secondary cold-rolling, double annealing；
Wherein, the condition once annealed is：Heating-up temperature：970±10℃；Heat time by 1.5min/mm+3~
5min is calculated, air cooling；
The condition of the double annealing is：Heating-up temperature：960±10℃；Heat time is based on 1.5min/mm+3~5min
Calculate, air cooling.
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 controls cold rolling total deformation 30~35%.
Preferably, the preparation method of flat cold-rolled sheet as described above, the parameter of the hot rolling are：
Famine rolls 1000 ± 10 DEG C of temperature, 970 ± 10 DEG C of final rolling temperature, and famine rolls 800 DEG C of finishing temperature ＞, finish rolling finishing temperature
800 DEG C of ＞；Heat 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, also washed after double annealing including soda acid and in vain
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-up temperature, deformation temperature control exist
955 DEG C~980 DEG C, deflection >=40%；
It is furthermore preferred that heating-up 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 the blank after hammer cogging is heated into 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：
Charging temperature≤700 DEG C, 1110 ± 10 DEG C of heating-up temperature, heat time >=4h, soaking time 2h.
Preferably, the preparation method of flat cold-rolled sheet as described above, the slab rolling include：By slab through the fire of milling train one
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 composition mass percent of the steel grade are：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~
0.47th, 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 composition mass percent of the steel grade are：
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~
0.47th, 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 present invention.It is unreceipted specific in embodiment
Condition person, the condition suggested according to normal condition or manufacturer are carried out.Agents useful for same or the unreceipted production firm person of instrument, it is
The conventional products of acquisition purchased in market can be passed through.
Embodiment
1 scope of application
GH909 alloys are a kind of Fe-Ni-Co bases age-hardening type low bulks to grow up on the basis of GH907 alloys
High temperature alloy, compared with GH907 alloys, the stress of alloy promotes grain boundary oxidation fragility (SAGBO) drag and creep rupture life to obtain
Further improve, but thermal coefficient of expansion and GH903, GH907 are essentially identical, and its performance can meet the following turbine hair of three generations substantially
The demand of motivation, it has low thermal coefficient of expansion, nearly constant modulus of elasticity and good comprehensive mechanical property, extensively should
For the clearance component between rotatable parts and stationary parts, clearance control technology is realized, saves the energy, reduces consumption, is improved
Motor power, but because alloy is free of Cr, its shortcoming is that oxidation drag and corrosion resistance are very low, particularly anti-oxidant problem,
GH909 alloys can not be completely anti-oxidant more than 650 DEG C.
GH2909 alloy melting points are about 1336~1384 DEG C, and proportion 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 plant equipment work well.
4.1.1.2 melting condition：
New crucible, which is smelted, needs Fe to wash 2 stoves, and the second stove iron washes that (pure 00), middle smelting need iron to wash (the pure stove of 00) 1 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 compositions.Alloy material must carry out an acceptance inspection after entering factory by raw material incoming inspection code, the surface of raw material, chi
Very little, lumpiness requirement meets 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, it is shown in Table 1.
GH2909 alloy compositions ▲ (wt%) table 1
4.1.1.6 charging
4.1.1.6.1 forehearth Fe, which is washed, ensures that CT1-1 wholeizations are complete, and turns over net molten steel, avoids removing material in stove.
4.1.1.6.2 it is all enter stove raw material through direct labor, specific responsibility inspection personnel by charger sheet inspection, weigh, confirm
Kind, quantity it is errorless and sign after can enter stove.
4.1.1.6.3Ni, Co and smart steel (CT1-1) once load crucible.C, Ti, Nb, Fe-B, Si are bent by smelting process
Line adds.
4.1.1.7 smelting process curve, such as Fig. 1.
4.1.1.8 main points are smelted：
Refining temperature requires precise control, ensures de- N effects, diligent to survey gentle agitation.Add ten minutes sampling analyses after Ti, add
Strengthen stirring when material and sampling, control tapping temperature.
4.1.1.9 cast
4.1.1.9.1 pour into a mould and carry out under vacuo, control poring rate and filling quality.
4.1.1.9.2 ingot mould must be scalded with molten steel, and cleaning is 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 stove cool time, which is more than 1.5h side, after pouring into a mould 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, confirm that equipment is good, vacuum degree of cold state ＜ 0.67Pa, gas leakage degree ＜
0.67Pa/min side can smelt.
4.2.2 consutrode
Cut end to end only, surface must be clean through abrasion wheel grinding, if after the bad cleaning that need to strip off the skin in surface, shrinkage cavity is towards lower from expendable weight
It is molten.
4.2.3 consumable technique
4.2.3.1 vacuum ＜ 0.67Pa sides can give 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 defined by the minimum current in molten bath to side.Melting is carried out by electrical force profiles.
Carry out rushing helium gas cooling in reflow process, its pressure be 600Pa ±.
4.2.3.4 it is certain it is noted that filling quality, gradually reduces electric current.Each stage is kept for certain time, can not be once
Low current is dropped to, molten bath is shunk as far as possible, is carried in shrinkage cavity, improves lumber recovery.
4.2.4 filling process：Start to fill in electrode 200 ± 10kg of residue, filling is as follows with reference to technique and step：
| 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, it is impossible to temperature occur
Fluctuate the excessive and warm phenomenon of race！Homogenization Treatments system is shown in Fig. 2, and steel ingot heats in bell furnace.
4.4. forging technology
4.4.1 steel ingot cogging forging is carried out in forging soon in 2000t or 4500t.
4.4.2 heating cycle
Heating cycle curve, such as Fig. 2:
4.4.3 forging technology
Cogging is forged：The multiple upsetting pull technique of generally use, specific deformation program determine regarding trimmed size；
4.4.3.1 finish forge unit heater skill
It is middle base heating curves below, soaking time can be suitably adjusted according to middle base size during production, with blank temperature
Degree is uniformly defined 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-up temperature, is shown in Fig. 3, becomes
Shape temperature control deflection >=40%, can not melt down empty burning at 955~980 DEG C.
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-up temperature, heat time
>=4h, soaking time 2h.
4.5.2 slab rolling
Slab rolls into the slab of required size through one fiery multi-pass of milling train, stops rolling temperature >=950 DEG C, passage maximum deformation quantity
≤ 25%.Flowed down after blank surface whole peeling, and take low power end to end on request.
4.5.3 billet rolling
Square billet rolls into the bar or blank of required size through one fiery multi-pass of milling train.
4.6. thin plate technique
4.6.1 hot rolling
Famine rolls 1000 ± 10 DEG C of temperature, 970 ± 10 DEG C of final rolling temperature, and famine rolls 800 DEG C of finishing temperature ＞, finish rolling finishing temperature
800 DEG C of ＞.Heat 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 is carried out in the stove of roller bottom.
4.6.3.1 semi-finished product
Heating-up temperature：970±10℃.
Heat time is calculated by 1.5min/mm+3~5min, air cooling.
4.6.3.2 finished product
960 ± 10 DEG C of heating-up temperature.940 ± 10 DEG C of finished products temperature.
Heat time is calculated by 1.5min/mm+3~5min, air cooling.
4.6.4 soda acid wash, albefaction
Performed by iron-base superalloy technique.
4.6.5 finishing, inspection, flaw detection, packaging, storage.
4.7. unaccomplished matter is performed by basic operation regulation.
Experimental example
According to cold prepared by the GB/T 4339-2008 metal material thermal expansion characters measurement method of parameters detection present invention
Roll the room temperature~600 DEG C average coefficient of linear expansion of thin plate.Size of sample isDetection is (moral) using equipment
NETZSCH DIL 203SE dilatometers.Testing result is as shown in the table：
0.6mm thickness cold rolled sheet end properties are detected simultaneously, it is as a result as shown in the table：
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, but it will be understood by those within the art that：Its
The technical scheme described in foregoing embodiments can still be modified, either to which part or all technical characteristic
Carry out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention skill
The scope of art scheme.
Claims (10)
1. a kind of preparation method of flat cold-rolled sheet, it include be by kind chemical composition mass percent：C≤0.06, Ni 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≤
0.20th, Mn≤1.00, Al≤0.20, Cr≤1.00, Cu≤0.50, S≤0.015, P≤0.015, surplus are made up of Fe steel grade
Steel billet successively by hot rolling, once cold rolling, once produce after annealing, secondary cold-rolling, double annealing；
Wherein, the condition once annealed is：Heating-up temperature：970±10℃；Heat time presses 1.5min/mm+3~5min
Calculate, air cooling；
The condition of the double annealing is：Heating-up temperature：960±10℃；Heat time is calculated by 1.5min/mm+3~5min,
Air cooling.
2. the preparation method of flat cold-rolled sheet according to claim 1, it is characterised in that the once cold rolling control cold rolling is total
Deflection is 30%~35%；The secondary cold-rolling controls cold rolling total deformation 30~35%.
3. the preparation method of flat cold-rolled sheet according to claim 1, it is characterised in that the parameter of the hot rolling is：
Famine rolls 1000 ± 10 DEG C of temperature, 970 ± 10 DEG C of final rolling temperature, and famine rolls 800 DEG C of finishing temperature ＞, finish rolling finishing temperature ＞
800℃；Heat time is calculated by 1.5min/mm+3-5min.Maximum pass deformation ＜ 25%, last time deflection 20~
25%.
4. the preparation method of flat cold-rolled sheet according to claim 1, it is characterised in that also include after double annealing
Soda acid is washed and albefaction step.
5. the preparation method of flat cold-rolled sheet according to claim 1, it is characterised in that the steel billet is passed through by the steel grade
Vacuum induction melting and vacuum consumable refusion and smelting process route obtain steel ingot, after the steel ingot hammer cogging, rolling-cogging
Obtain steel billet.
6. the preparation method of flat cold-rolled sheet according to claim 5, it is characterised in that the hammer cogging includes：
Single arm or the fire forging of quick forging machine or precise forging machine end：980 DEG C~1020 DEG C of heating-up temperature, deformation temperature are controlled at 955 DEG C
~980 DEG C, deflection >=40%.
7. the preparation method of flat cold-rolled sheet according to claim 5, it is characterised in that the rolling-cogging includes：
Slab rolling is carried out after the blank after hammer cogging is heated into cogging in the continuous oven of milling train.
8. the preparation method of flat cold-rolled sheet according to claim 7, it is characterised in that it is described heating cogging condition be：
Charging temperature≤700 DEG C, 1110 ± 10 DEG C of heating-up temperature, heat time >=4h, soaking time 2h.
9. the preparation method of flat cold-rolled sheet according to claim 7, it is characterised in that the slab rolling includes：By plate
Base rolls into the slab of required size through one fiery multi-pass of milling train, stops rolling temperature >=950 DEG C, passage maximum deformation quantity≤25%.
10. the preparation method of flat cold-rolled sheet according to claim 1, it is characterised in that the chemical composition matter of the steel grade
Measuring percentage is：C≤0.012, Ni are 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。
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| CN109136717A (en) * | 2018-11-07 | 2019-01-04 | 成都先进金属材料产业技术研究院有限公司 | Low expansion superalloy heat treatment method |
| CN110527892A (en) * | 2019-10-10 | 2019-12-03 | 成都先进金属材料产业技术研究院有限公司 | Low expansion superalloy and preparation method thereof |
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| CN117363960A (en) * | 2023-12-08 | 2024-01-09 | 成都先进金属材料产业技术研究院股份有限公司 | Low-carbon aluminum-free high-niobium-iron-based superalloy and preparation method thereof |
| CN117363960B (en) * | 2023-12-08 | 2024-03-08 | 成都先进金属材料产业技术研究院股份有限公司 | Low-carbon aluminum-free high-niobium-iron-based superalloy and preparation method thereof |
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