CN114540730A - High-quality nickel-chromium-iron-based high-temperature alloy plate and preparation method thereof - Google Patents
High-quality nickel-chromium-iron-based high-temperature alloy plate and preparation method thereof Download PDFInfo
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- 239000000956 alloy Substances 0.000 title claims abstract description 79
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 77
- BIJOYKCOMBZXAE-UHFFFAOYSA-N chromium iron nickel Chemical compound [Cr].[Fe].[Ni] BIJOYKCOMBZXAE-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 238000005097 cold rolling Methods 0.000 claims abstract description 102
- 238000004381 surface treatment Methods 0.000 claims abstract description 28
- 238000005406 washing Methods 0.000 claims abstract description 13
- 229910000601 superalloy Inorganic materials 0.000 claims description 40
- 230000003746 surface roughness Effects 0.000 claims description 22
- 238000004321 preservation Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 13
- 238000000137 annealing Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 229910019589 Cr—Fe Inorganic materials 0.000 claims 2
- 239000000047 product Substances 0.000 claims 2
- 239000012467 final product Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 50
- 238000001816 cooling Methods 0.000 description 21
- 238000005098 hot rolling Methods 0.000 description 17
- 238000005242 forging Methods 0.000 description 13
- 238000005096 rolling process Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 9
- 239000002253 acid Substances 0.000 description 7
- 239000003513 alkali Substances 0.000 description 7
- 238000000265 homogenisation Methods 0.000 description 7
- 230000006698 induction Effects 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- 239000006104 solid solution Substances 0.000 description 5
- 239000002585 base Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The application relates to the technical field of high-temperature alloy materials, and particularly discloses a high-quality nickel-chromium-iron-based high-temperature alloy plate and a preparation method thereof. The preparation method of the high-temperature alloy plate comprises the following steps: preparing a plate blank, cold rolling, performing solution treatment on a finished product, and performing surface treatment; wherein, cold rolling: cold rolling the prepared plate blank to obtain a cold-rolled plate; solution treatment of a finished product: carrying out solution treatment on the cold-rolled plate to obtain a plate subjected to solution treatment; surface treatment: carrying out acid-base washing and surface oil grinding on the plate subjected to the solution treatment to obtain a surface-treated plate; the surface oil grinding mode is single-side grinding; the total reduction of the thickness of the plate after surface treatment is controlled to be less than or equal to 1 percent of the thickness of the plate after cold rolling. The high-temperature alloy plate prepared by the preparation method provided by the application has high thickness precision and high surface quality.
Description
Technical Field
The application relates to the technical field of high-temperature alloy materials, in particular to a high-quality nickel-chromium-iron-based high-temperature alloy plate and a preparation method thereof.
Background
The GH4169 alloy is a nickel-chromium-iron-based aging-strengthening type deformation high-temperature alloy. The alloy has higher strength and plasticity, good corrosion resistance, oxidation resistance and fatigue resistance, excellent fracture toughness and irradiation resistance at the temperature of below 650 ℃, and meanwhile, the GH4169 alloy also has the characteristics of good processing performance and excellent welding performance.
The GH4169 alloy was primarily used in early applications for turbine disks of aircraft engines. In recent years, products such as plates, tapes, rods, wire rods, etc., manufactured using the alloy have been widely used in various fields. At present, the GH4169 alloy has been widely used as a key material in the fields of aviation, aerospace, nuclear energy, petroleum, chemical industry and the like. The GH4169 alloy has become a typical representation of "one-material-multiple" superalloys, with an annual yield of more than 45% of wrought superalloys.
With the continuous development of the fields of aeroengines and the like, more strict requirements are put on the width, the dimensional accuracy and the surface quality of the GH4169 alloy sheet material for structural members. However, the current GH4169 alloy sheet material generally has the problems of low dimensional accuracy and poor surface quality, and is difficult to meet the design and use requirements.
Disclosure of Invention
In order to improve the dimensional accuracy and the surface quality of the high-temperature alloy plate, the application provides a high-quality nickel-chromium-iron-based high-temperature alloy plate and a preparation method thereof.
In a first aspect, the application provides a method for preparing a high-quality nickel-chromium-iron-based high-temperature alloy plate. The following technical scheme is adopted:
a preparation method of a high-quality nickel-chromium-iron-based high-temperature alloy plate comprises the following steps: preparing a plate blank, cold rolling, performing solution treatment on a finished product, and performing surface treatment;
wherein, cold rolling: cold rolling the prepared plate blank to obtain a cold-rolled plate; the cold rolling comprises intermediate heat cold rolling and final heat cold rolling; in each hot cold rolling, the hot deformation is uniformly distributed to the cold deformation of each pass;
the thickness of the plate after each heat cold rolling is calculated as follows:
wherein δ n represents the thickness of the hot cold rolled for the nth time; delta0Representing the initial thickness of the plate before the heat cold rolling; n is the number of fire pass; d is the fire deformation; p is the number of cold rolling passes per fire;
solution treatment of a finished product: carrying out solution treatment on the cold-rolled plate to obtain a plate subjected to solution treatment;
surface treatment: carrying out acid-base washing and surface oil grinding on the plate subjected to the solution treatment to obtain a surface-treated plate; the surface oil grinding mode is single-side grinding; the total reduction of the thickness of the plate after surface treatment is controlled to be less than or equal to 1 percent of the thickness of the plate after cold rolling.
By adopting the technical scheme, the method for calculating the thickness of the plate after cold rolling of each heat in the cold rolling treatment is provided, so that the cold rolling deformation of each heat in the cold rolling treatment is optimized, and the plate can keep good structure performance in the cold rolling treatment process. Along with the cold rolling, the deformation of the high-temperature alloy plate can be well controlled in each heat rolling, so that the prepared high-temperature alloy plate has good thickness precision and surface roughness.
In addition, the prepared high-temperature alloy plate is subjected to surface treatment by adopting an oil mill, and the total thinning amount of the high-temperature alloy plate subjected to the oil mill treatment is controlled to be less than or equal to 1% of the thickness of the plate subjected to cold rolling, so that the thickness precision of the high-temperature alloy plate is further improved while the surface roughness of the prepared high-temperature alloy plate is controlled.
In a specific embodiment, in the cold rolling treatment, the total reduction in the thickness of the surface-treated sheet is 0.4% or less of the thickness of the cold-rolled sheet.
In a specific embodiment, in the cold rolling process, the total reduction in the thickness of the surface-treated sheet is 0.4% of the thickness of the cold-rolled sheet.
In a specific embodiment, in the cold rolling treatment, the total reduction in the thickness of the surface-treated sheet is 0.5% or less of the thickness of the cold-rolled sheet.
In a specific embodiment, in the cold rolling process, the total reduction in the thickness of the surface-treated sheet is 0.5% of the thickness of the cold-rolled sheet.
Preferably, the deformation amount of the intermediate heat cold rolling is 10-50%.
Preferably, the annealing temperature of the intermediate heat cold rolling is 1020-1100 ℃, and the heat preservation time is 2-5 times of the thickness of the prepared plate blank.
Preferably, the final heat time cold rolling deformation amount is 25-60%.
Preferably, in the solution treatment of the finished product, the temperature of the solution treatment is 940-.
Preferably, in the solution treatment of the finished product, the temperature of the solution treatment is 980 ℃.
Preferably, in the solution treatment of the finished product, the heat preservation time is 4.3-7.5 times of the thickness of the plate after cold rolling.
In a specific embodiment, in the solution treatment of the finished product, the temperature of the solution treatment is 980 ℃, and the holding time is 4.3 times of the thickness of the cold-rolled sheet.
In a specific embodiment, in the solution treatment of the finished product, the temperature of the solution treatment is 980 ℃, and the holding time is 7.5 times of the thickness of the cold-rolled sheet.
In a second aspect, the present application provides a high-quality nickel-chromium-iron-based superalloy sheet prepared by the above preparation method.
Preferably, the thickness of the high-temperature alloy plate is 0.2-2mm, the width of the high-temperature alloy plate is 600-1050 mm, and the length of the high-temperature alloy plate is 1200-2500 mm.
Preferably, the thickness of the high-temperature alloy plate is 0.5-1.5mm,
preferably, the thickness precision of the high-temperature alloy plate is +/-5.0-6.5% of the target thickness of the high-temperature alloy plate.
In a specific embodiment, the superalloy sheet has a thickness accuracy of ± 5.0% of a target thickness of the superalloy sheet.
In a specific embodiment, the superalloy sheet has a thickness accuracy of ± 6.5% of a target thickness of the superalloy sheet.
Preferably, the surface roughness of the high-temperature alloy plate is 0.05-0.2 μm.
In some specific embodiments, the surface roughness of the superalloy sheet may be 0.05 to 0.08 μm, 0.05 to 0.1 μm, 0.08 to 0.2 μm, 0.1 to 0.2 μm.
In a specific embodiment, the surface roughness of the superalloy sheet is 0.2 μm.
In a specific embodiment, the superalloy sheet has a surface roughness of 0.1 μm.
In a specific embodiment, the surface roughness of the superalloy sheet is 0.08 μm.
In a specific embodiment, the surface roughness of the superalloy sheet is 0.05 μm.
Preferably, the high-temperature alloy plate comprises the following components in percentage by mass: 0.010-0.030% of C, less than or equal to 0.25% of Si, less than or equal to 0.25% of Mn, 17.0-21.0% of Cr, 50.0-55.0% of Ni, 2.80-3.30% of Mo, 4.75-5.50% of Nb, 0.75-1.15% of Ti, 0.30-0.70% of Al, less than or equal to 1.0% of Co, less than or equal to 0.10% of Cu, less than or equal to 0.010% of P, less than or equal to 0.0010% of S, less than or equal to 0.003% of O, less than or equal to 0.010% of N, less than or equal to 0.006% of B, less than or equal to 0.01% of Mg, less than or equal to 0.05% of Ta, and the balance of Fe.
By optimizing the element content of the high-temperature alloy, particularly reducing the content of carbon element in the high-temperature alloy, the high-temperature alloy can keep good structure performance in the cold rolling process. Therefore, the deformation of the high-temperature alloy plate can be well controlled in each heat rolling along with the cold rolling, so that the thickness precision and the surface quality of the high-temperature alloy plate can be well controlled. The thickness precision of the high-temperature alloy plate can reach +/-5.0-6.5% of the target thickness of the high-temperature alloy plate, and the surface roughness can reach 0.05-0.2 mu m.
In summary, the present application has the following beneficial effects:
the method for calculating the thickness of the plate after cold rolling of each heat in the cold rolling treatment is provided, and the prepared high-temperature alloy plate has high thickness precision and high surface quality by optimizing the cold rolling deformation of each heat in the cold rolling treatment and combining the optimization of alloy components and the control of the surface quality of the plate. Meanwhile, the plate prepared by the preparation method of the high-temperature alloy plate has good structural property uniformity, and is suitable for large-scale popularization and application.
Drawings
Fig. 1 is a photograph of a high-quality ni-cr-fe-based superalloy sheet provided in example 2 of the present application.
Fig. 2 is a photograph of the grain structure of the high-quality ni-cr-fe-based superalloy sheet provided in example 2 of the present application.
Detailed Description
The application provides a preparation method of a high-quality nickel-chromium-iron-based high-temperature alloy plate, which comprises the following steps: preparing a plate blank, cold rolling, performing solution treatment on a finished product, and performing surface treatment;
wherein, cold rolling: cold rolling the prepared plate blank to obtain a cold-rolled plate; the cold rolling comprises intermediate fire time cold rolling and final fire time cold rolling; in each hot cold rolling, the hot deformation is uniformly distributed to the cold deformation of each pass;
the thickness of the plate after each heat cold rolling is calculated as follows:
wherein δ n represents the thickness of the hot cold rolled for the nth time; delta0The initial thickness of the plate before the heat cold rolling is represented; n is the number of the fire pass; d is the fire deformation; p is the number of cold rolling passes per fire.
Solution treatment of a finished product: and carrying out solution treatment on the cold-rolled plate to obtain the plate after the solution treatment. The temperature of the solution treatment is 940-. The cooling mode adopts air cooling or natural cooling.
Surface treatment: washing the plate subjected to the solid solution treatment with acid and alkali to remove oxide skin, and then performing surface oil grinding to obtain a plate subjected to surface treatment; the surface oil grinding mode is single-side grinding; the total reduction of the thickness of the plate after surface treatment is controlled to be less than or equal to 1 percent of the thickness of the plate after cold rolling.
Furthermore, the cold rolling deformation of the intermediate heat times is 10-50%. The annealing temperature of the intermediate heat cold rolling is 1020-1100 ℃, and the heat preservation time is 2-5 times of the thickness of the prepared plate blank.
Furthermore, the final heat time cold rolling deformation is 25-60%.
The application also provides a high-quality nickel-chromium-iron-based high-temperature alloy plate prepared by the preparation method. The high-temperature alloy plate is 0.2-2mm in thickness, 600-1050 mm in width and 1200-2500 mm in length. The thickness precision of the high-temperature alloy plate is +/-5.0-6.5% of the target thickness of the high-temperature alloy plate. Furthermore, the surface roughness of the high-temperature alloy plate is 0.05-0.2 μm.
Further, the high-temperature alloy plate comprises the following components in percentage by mass: 0.010-0.030% of C, less than or equal to 0.25% of Si, less than or equal to 0.25% of Mn, 17.0-21.0% of Cr, 50.0-55.0% of Ni, 2.80-3.30% of Mo, 4.75-5.50% of Nb, 0.75-1.15% of Ti, 0.30-0.70% of Al, less than or equal to 1.0% of Co, less than or equal to 0.10% of Cu, less than or equal to 0.010% of P, less than or equal to 0.0010% of S, less than or equal to 0.003% of O, less than or equal to 0.010% of N, less than or equal to 0.006% of B, less than or equal to 0.01% of Mg, less than or equal to 0.05% of Ta, and the balance of Fe.
Specifically, the preparation of the plate blank comprises vacuum induction melting, remelting, homogenization heat treatment, hot forging treatment and hot rolling treatment.
The preparation method of the high-quality nickel-chromium-iron-based high-temperature alloy plate provided by the application specifically comprises the following steps:
1. vacuum induction melting: smelting and casting the raw materials into an ingot A.
2. Remelting: remelting the ingot A obtained in the step 1 to obtain an ingot B. Wherein the remelting mode can be electroslag remelting, vacuum consumable remelting, electroslag remelting combined with vacuum consumable remelting
3. Homogenizing heat treatment: and (3) carrying out homogenization heat treatment on the ingot B obtained in the step (2) to obtain an ingot C. And the ingot after the homogenization heat treatment is processed by the wave batch treatment to remove the surface oxide skin and the defects,
4. hot forging treatment
The hot forging treatment specifically comprises the following steps:
s1, hot forging: and (4) forging the ingot C obtained in the step (3) at high temperature for multiple times to obtain a thick slab. Wherein the thickness of the thick plate blank is 80-160 mm.
S2, surface grinding: and carrying out surface grinding on the obtained thick plate blank, and removing surface oxide skin and defects.
5. Hot rolling treatment
The hot rolling treatment specifically comprises the following steps:
s1 hot rolling: and (4) rolling the thick plate blank obtained in the step (S4) at high temperature for multiple times to obtain a thin plate blank. Wherein the thickness of the thin slab is 4-8 mm.
S2 solution treatment: the thin slab obtained in S1 is subjected to solution treatment to obtain a slab subjected to solution treatment. Wherein the solution treatment temperature is 1020-1100 ℃, the heat preservation time is 3-7 times of the thickness of the sheet billet, and the cooling mode adopts air cooling or natural cooling.
S3 surface treatment: and (4) carrying out acid-base washing treatment and mechanical polishing on the slab subjected to the solution treatment obtained in the step (S2) to remove surface scale and defects, namely the slab obtained through hot rolling treatment.
6. Cold rolling
Cold rolling the plate blank obtained by the hot rolling treatment in the step 5 to obtain a cold-rolled plate; the cold rolling comprises intermediate fire time cold rolling and final fire time cold rolling; in each hot cold rolling, the hot deformation is uniformly distributed to the cold deformation of each pass;
the thickness of the plate after each heat cold rolling is calculated as follows:
wherein δ n represents the thickness of the hot cold rolled for the nth time; delta0The initial thickness of the plate before the heat cold rolling is represented; n is the number of fire pass; d is the fire deformation; p is the number of cold rolling passes per fire.
7. Solution treatment of a finished product: and (4) carrying out solution treatment on the cold-rolled sheet obtained in the step (6) to obtain a sheet after the solution treatment. The temperature of the solution treatment is 960-. The cooling mode adopts air cooling or natural cooling.
8. Surface treatment: washing the plate subjected to the solid solution treatment obtained in the step 7 with acid and alkali to remove oxide skin, and then performing surface oil grinding to obtain a plate subjected to surface treatment; the surface oil grinding mode is single-side grinding; the total reduction of the thickness of the plate after surface treatment is controlled to be less than or equal to 1 percent of the thickness of the plate after cold rolling.
The present application is described in further detail below with reference to examples 1-2, FIGS. 1-2, and the results of the performance tests.
Examples
Example 1
This example provides a high quality nickel-chromium-iron based superalloy sheet.
The high-quality nickel-chromium-iron-based high-temperature alloy plate comprises the following components: 0.012% of C, 0.08% of Si, 0.021% of Mn, 18.0% of Cr, 54.0% of Ni, 3.0% of Mo, 5.1% of Nb, 0.98% of Ti, 0.49% of Al, 0.15% of Co, 0.02% of Cu, 0.0065% of P, 0.0005% of S, 0.0006% of O, 0.0070% of N, 0.003% of B, 0.0005% of Mg, less than or equal to 0.05% of Ta and the balance of Fe.
The preparation method of the high-quality nickel-chromium-iron-based high-temperature alloy plate comprises the following steps:
1. vacuum induction melting: smelting the raw materials by a vacuum induction smelting furnace, and casting into an ingot A.
2. Remelting: and (3) carrying out vacuum consumable remelting on the ingot A obtained in the step (1) to obtain an ingot B.
3. Homogenizing heat treatment
And (3) carrying out homogenization heat treatment on the ingot B obtained in the step (2), and carrying out batch treatment on the ingot after the homogenization heat treatment to remove surface oxide skin and defects of the ingot to obtain an ingot C.
4. Hot forging treatment
The hot forging treatment specifically comprises the following steps:
s1, hot forging: and (4) forging the ingot C obtained in the step (3) at high temperature for multiple times to obtain a thick slab. Wherein the thickness of the thick plate blank is 100 mm.
S2, surface grinding: and carrying out surface grinding on the obtained thick plate blank, and removing surface oxide skin and defects.
5. Hot rolling treatment
The hot rolling treatment specifically comprises the following steps:
s1 hot rolling: and (4) rolling the thick plate blank obtained in the step (S4) at high temperature for multiple times to obtain a thin plate blank. Wherein the thickness of the thin slab is 5 mm.
S2 solution treatment: the thin slab obtained in S1 is subjected to solution treatment to obtain a slab subjected to solution treatment. Wherein the solution treatment temperature is 1040 ℃, the heat preservation time is 30min, the heat preservation time is 6 times of the thickness of the sheet billet, and the cooling mode adopts air cooling.
S3 surface treatment: and (4) carrying out acid-base washing treatment and mechanical polishing on the slab subjected to the solution treatment obtained in the step (S2) to remove surface scale and defects, namely the slab obtained through hot rolling treatment.
6. Cold rolling of steel
And (5) cold rolling the plate blank obtained by the hot rolling treatment in the step (5) to obtain a cold-rolled plate. The cold rolling comprises intermediate heat times of cold rolling and final heat times of cold rolling. In each hot cold rolling, the hot deformation is uniformly distributed to the cold deformation of each pass;
the thickness of the plate after each heat cold rolling is calculated as follows:
wherein δ n represents the thickness of the hot cold rolled for the nth time; delta0The initial thickness of the plate before the heat cold rolling is represented; n is the number of fire pass; d is the fire deformation; p is the number of cold rolling passes per fire.
The rolling process is as follows: 5.0 → 4.0 → 3.2 → 2.5 → 2.0 → 1.4 mm.
The cold rolling deformation of the intermediate heat times is respectively 20%, 21.8% and 20%. The annealing temperature of the intermediate heat cold rolling is 1040 ℃, and the heat preservation time is 20 min, 16 min, 13 min and 10min respectively. Air cooling is adopted after intermediate annealing.
The final heat cold rolling deformation is 30%.
The detailed rolling process comprises the following steps:
(5.0→4.9→4.8→4.7→4.6→4.5→4.4→4.3→4.2→4.1→4.0)→
(4.0→3.92→3.84→3.76→3.68→3.60→3.52→3.44→3.36→3.28→3.20)→
(2.50→2.45→2.40→2.35→2.30→2.25→2.20→2.15→2.10→2.05→2.0)→
(2.0→1.95→1.90→1.85→1.80→1.75→1.70→1.65→1.60→1.55→1.50→1.45→1.40)。
7. solution treatment of a finished product: and (4) carrying out solution treatment on the cold-rolled sheet obtained in the step (6) to obtain a sheet after the solution treatment. The solution treatment temperature is 980 ℃, the heat preservation time is 6min, and the heat preservation time is 4.3 times of the thickness of the cold-rolled sheet. The cooling mode adopts air cooling.
8. Surface treatment: and (4) washing the plate subjected to the solid solution treatment obtained in the step (7) with acid and alkali to remove oxide skin, and then performing surface oil grinding to obtain the plate subjected to the surface treatment. The surface oil grinding mode is single-side grinding; grinding each surface twice, wherein the grinding amount of each surface is 0.003mm, the total thinning amount is 0.006mm, and the total thinning amount is 0.4 percent of the thickness of the cold-rolled plate.
The high-quality nickel-chromium-iron-based high-temperature alloy plate prepared by the embodiment has the width of 1000mm, the length of 2000mm, the thickness of 1.4mm, the thickness precision of +/-0.09 mm, the thickness precision of +/-6.5% of the target thickness of the high-temperature alloy plate and the surface roughness of 0.08 mu m.
Example 2
The embodiment provides a high-quality nickel-chromium-iron-based high-temperature alloy plate.
The high-quality nickel-chromium-iron-based high-temperature alloy plate comprises the following components: 0.025 percent of C, 0.06 percent of Si, 0.018 percent of Mn, 18.9 percent of Cr, 53.65 percent of Ni, 2.99 percent of Mo, 5.09 percent of Nb, 1.02 percent of Ti, 0.59 percent of Al, 0.11 percent of Co, 0.02 percent of Cu, 0.0059 percent of P, 0.0004 percent of S, 0.0005 percent of O, 0.0068 percent of N, 0.0030 percent of B, 0.0004 percent of Mg, less than 0.05 percent of Ta and the balance of Fe.
The preparation method of the high-quality nickel-chromium-iron-based high-temperature alloy plate comprises the following steps:
1. vacuum induction melting: smelting the raw materials by a vacuum induction smelting furnace, and casting into an ingot A.
2. Remelting: and (3) carrying out vacuum consumable remelting on the ingot A obtained in the step (1) to obtain an ingot B.
3. Homogenizing heat treatment
And (3) carrying out homogenization heat treatment on the ingot B obtained in the step (2), and carrying out batch treatment on the ingot after the homogenization heat treatment to remove surface oxide skin and defects of the ingot to obtain an ingot C.
4. Hot forging treatment
The hot forging treatment specifically comprises the following steps:
s1, hot forging: and (4) forging the ingot C obtained in the step (3) at high temperature for multiple times to obtain a thick slab. Wherein the thickness of the thick plate blank is 120 mm.
S2, surface grinding: and carrying out surface grinding on the obtained thick plate blank, and removing surface oxide skin and defects.
5. Hot rolling treatment
The hot rolling treatment specifically comprises the following steps:
s1 hot rolling: and (4) rolling the thick plate blank obtained in the step (S4) at high temperature for multiple times to obtain a thin plate blank. Wherein the thickness of the thin slab is 6 mm.
S2 solution treatment: the thin slab obtained in S1 is subjected to solution treatment to obtain a slab subjected to solution treatment. Wherein the solution treatment temperature is 1050 ℃, the heat preservation time is 25min, the heat preservation time is 4.2 times of the thickness of the thin slab, and the cooling mode adopts air cooling.
S3 surface treatment: and (4) carrying out acid-base washing treatment and mechanical polishing on the slab subjected to the solution treatment obtained in the step (S2) to remove surface scale and defects, namely the slab obtained through hot rolling treatment.
6. Cold rolling
And (5) cold rolling the plate blank obtained by the hot rolling treatment in the step (5) to obtain a cold-rolled plate. The cold rolling comprises intermediate heat times of cold rolling and final heat times of cold rolling. In each hot cold rolling, the hot deformation is uniformly distributed to the cold deformation of each pass;
the thickness of the plate after each heat cold rolling is calculated as follows:
wherein δ n represents the thickness of the hot cold rolled for the nth time; delta0Representing the initial thickness of the plate before the heat cold rolling; n is the number of fire pass; d is the heat distortion(ii) a P is the number of cold rolling passes per fire.
The rolling process is as follows: 6.0 → 3.9 → 2.7 → 1.8 → 1.2 → 0.8 mm.
The cold rolling deformation of the intermediate heat times is 35%, 30%, 33% and 33%. The annealing temperature of the intermediate heat cold rolling is 1050 ℃, and the heat preservation time is 16 min, 11 min, 8 min and 5min respectively. Air cooling is adopted after intermediate annealing.
The final heat cold rolling deformation was 33%.
The detailed rolling process comprises the following steps:
(6.0→5.79→5.58→5.37→5.16→4.95→4.74→4.53→4.32→4.11→3.90)→
(3.9→3.78→3.66→3.54→3.42→3.30→3.18→3.06→2.94→2.82→2.70)→
(2.70→2.61→2.52→2.43→2.34→2.25→2.16→2.07→1.98→1.89→1.80)→
(1.80→1.74→1.68→1.62→1.56→1.50→1.44→1.38→1.32→1.26→1.20)→
(1.20→1.16→1.13→1.10→1.06→1.03→1.00→0.96→0.93→0.90→
(0.87→0.83→0.80)。
7. solution treatment of a finished product: and (4) carrying out solution treatment on the cold-rolled sheet obtained in the step (6) to obtain a sheet after the solution treatment. The solution treatment temperature is 980 ℃, the heat preservation time is 6min, and the heat preservation time is 7.5 times of the thickness of the cold-rolled sheet. The cooling mode adopts air cooling.
8. Surface treatment: and (4) washing the plate subjected to the solid solution treatment obtained in the step (7) with acid and alkali to remove oxide skin, and then performing surface oil grinding to obtain the plate subjected to the surface treatment. The surface oil grinding mode is single-side grinding; grinding each surface twice, wherein the grinding amount of each surface is 0.002mm, the total thinning amount is 0.004mm, and the total thinning amount is 0.5% of the thickness of the cold-rolled plate.
The high-quality nickel-chromium-iron-based high-temperature alloy plate prepared by the embodiment has the width of 1000mm, the length of 2000mm, the thickness of 0.8mm and the thickness precision of +/-0.04 mm, the thickness precision reaches +/-5.0% of the target thickness of the high-temperature alloy plate, and the surface roughness is 0.1 mu m.
Refer to fig. 1 and 2.
Fig. 1 is a photograph of a high-quality ni-cr-fe-based superalloy sheet provided in example 2 of the present application.
Fig. 2 is a photograph of the grain structure of the high-quality ni-cr-fe-based superalloy sheet provided in example 2 of the present application.
With reference to fig. 1-2, it can be seen that the grain structure of the superalloy plate prepared in this embodiment is more uniform, and the preparation method for preparing a superalloy plate provided by the present application is described, so that the prepared superalloy plate has a more uniform and finer grain structure, and thus the prepared superalloy plate has higher thickness precision and smaller surface roughness.
Comparative example
Comparative example 1
This comparative example provides a high quality nickel-chromium-iron based superalloy sheet.
The comparative example differs from example 1 in that: the preparation method of the high-temperature alloy plate is specifically the deformation of the high-temperature alloy plate of each heat pass and each heat pass in cold rolling. The method comprises the following specific steps:
6. cold rolling
And (5) cold rolling the plate blank obtained by the hot rolling treatment in the step (5) to obtain a cold-rolled plate.
The rolling process is as follows: 5.0 → 4.0 → 3.2 → 2.5 → 2.0 → 1.4 mm.
Wherein the detail rolling process of the last fire number is as follows:
(2.0→1.85→1.75→1.67→1.6→1.54→1.49→1.46→1.44→1.42→1.40)。
7. solution treatment of a finished product: and (4) carrying out solution treatment on the cold-rolled sheet obtained in the step (6) to obtain a sheet after the solution treatment. The solution treatment temperature is 980 ℃, the heat preservation time is 6min, and the heat preservation time is 7.5 times of the thickness of the cold-rolled sheet. The cooling mode adopts air cooling.
8. Surface treatment: and (4) washing the plate subjected to the solid solution treatment obtained in the step (7) with acid and alkali, and removing oxide skin to obtain the plate subjected to surface treatment.
The high-quality nickel-chromium-iron-based high-temperature alloy plate prepared by the comparative example has the width of 1000mm, the length of 2000mm, the thickness of 1.4mm, the thickness precision of +/-0.13 mm, the thickness precision of +/-10% of the target thickness of the high-temperature alloy plate and the surface roughness of 0.3 mu m.
The high-quality nickel-chromium-iron-based superalloy sheet prepared in example 1 had a thickness accuracy of ± 0.09mm, which was ± 6.5% of the target thickness of the superalloy sheet, which was less than ± 10% of the thickness accuracy of the superalloy sheet provided in comparative example 1. In addition, the surface roughness of the high-quality nickel-chromium-iron-based superalloy sheet prepared in example 1 was 0.08 μm, which is much lower than the surface roughness of the superalloy sheet provided in comparative example 1 by 0.3 μm.
Based on the above, the high temperature alloy plate that this application provided has better thickness precision and surface roughness. According to the preparation method of the high-temperature alloy plate, the thickness precision and the surface roughness of the prepared high-temperature alloy plate are controlled by uniformly distributing the deformation of the high-temperature alloy in the last firing pass, so that the prepared high-temperature alloy plate has better thickness precision and surface roughness. In the preparation method of the high-temperature alloy plate provided in the comparative example 1, the last-fire deformation amount is distributed in a mode of first large and then small, so that the high-temperature alloy plate prepared in the comparative example 1 is high in thickness precision and high in surface roughness.
In addition, the surface treatment in the preparation method of the high-temperature alloy plate provided by the application is carried out by using an oil mill on the basis of acid and alkali washing, and the ink mode, the ink frequency and the total thinning amount after the oil mill are controlled, while the surface treatment in the preparation method of the high-temperature alloy plate provided by the comparative example 1 only adopts the acid and alkali washing mode, so that the application can further improve the surface roughness of the prepared high-temperature alloy plate.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The preparation method of the high-quality nickel-chromium-iron-based high-temperature alloy plate is characterized by comprising the following steps of:
preparing a plate blank, cold rolling, performing solution treatment on a finished product, and performing surface treatment;
wherein, cold rolling: cold rolling the prepared plate blank to obtain a cold-rolled plate; the cold rolling comprises intermediate fire time cold rolling and final fire time cold rolling; in each hot cold rolling, the hot deformation is uniformly distributed to the cold deformation of each pass; the thickness of the plate after each heat cold rolling is calculated as follows:
wherein δ n represents the thickness of the hot cold rolled for the nth time; delta0Representing the initial thickness of the plate before the heat cold rolling; n is the number of fire pass; d is the fire deformation; p is the number of cold rolling passes per fire;
solution treatment of a finished product: carrying out solution treatment on the cold-rolled plate to obtain a plate subjected to solution treatment;
surface treatment: carrying out acid-base washing and surface oil grinding on the plate subjected to the solution treatment to obtain a surface-treated plate; the surface oil grinding mode is single-side grinding; the total reduction of the thickness of the plate after surface treatment is controlled to be less than or equal to 1 percent of the thickness of the plate after cold rolling.
2. The method for preparing a high-quality nickel-chromium-iron-based superalloy sheet according to claim 1, wherein the intermediate heat cold rolling deformation is 10-50%.
3. The method for preparing a high-quality nickel-chromium-iron-based high-temperature alloy plate according to claim 2, wherein the annealing temperature of the intermediate heat cold rolling is 1020-1100 ℃, and the holding time is 2-5 times of the thickness of the prepared plate blank.
4. The method for preparing a high-quality nickel-chromium-iron-based superalloy sheet according to claim 1, wherein the final heat cold rolling deformation is 25-60%.
5. The method for preparing high-quality Ni-Cr-Fe-based superalloy sheet as claimed in claim 5, wherein the solution treatment temperature is 940-1020 ℃ in the solution treatment of the final product, and the heat preservation time is 2-8 times of the thickness of the sheet after cold rolling.
6. A high-quality Ni-Cr-Fe-based superalloy sheet produced by the method of any of claims 1 to 5.
7. The high-quality nickel-chromium-iron-based superalloy sheet according to claim 6, wherein the superalloy sheet is 0.2-2mm thick, 600-1050 mm wide, and 1200-2500 mm long.
8. The high quality nickel-chromium-iron based superalloy sheet of claim 6, wherein the superalloy sheet has a thickness accuracy of ± (5.0-6.5%) of a target superalloy sheet thickness.
9. The high-quality nickel-chromium-iron-based superalloy sheet according to claim 6, wherein the surface roughness of the superalloy sheet is 0.05 to 0.2 μm.
10. The high quality nickel-chromium-iron based superalloy sheet according to claim 6, wherein the superalloy sheet comprises the following composition in mass percent: 0.010-0.030% of C, less than or equal to 0.25% of Si, less than or equal to 0.25% of Mn, 17.0-21.0% of Cr, 50.0-55.0% of Ni, 2.80-3.30% of Mo, 4.75-5.50% of Nb, 0.75-1.15% of Ti, 0.30-0.70% of Al, less than or equal to 1.0% of Co, less than or equal to 0.10% of Cu, less than or equal to 0.010% of P, less than or equal to 0.0010% of S, less than or equal to 0.003% of O, less than or equal to 0.010% of N, less than or equal to 0.006% of B, less than or equal to 0.01% of Mg, less than or equal to 0.05% of Ta, and the balance of Fe.
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