CN115821181B - Thermo-mechanical treatment method of nickel-chromium-cobalt alloy - Google Patents
Thermo-mechanical treatment method of nickel-chromium-cobalt alloy Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 229910000531 Co alloy Inorganic materials 0.000 title claims abstract description 23
- SZMZREIADCOWQA-UHFFFAOYSA-N chromium cobalt nickel Chemical compound [Cr].[Co].[Ni] SZMZREIADCOWQA-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 230000000930 thermomechanical effect Effects 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 238000001816 cooling Methods 0.000 claims abstract description 27
- 230000032683 aging Effects 0.000 claims abstract description 16
- 239000006104 solid solution Substances 0.000 claims abstract description 16
- 238000005266 casting Methods 0.000 claims abstract description 13
- 238000004321 preservation Methods 0.000 claims abstract description 9
- 238000001953 recrystallisation Methods 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052759 nickel Inorganic materials 0.000 abstract description 4
- 229910000601 superalloy Inorganic materials 0.000 abstract description 4
- 238000005242 forging Methods 0.000 description 40
- 238000007599 discharging Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The invention relates to a thermomechanical treatment method of nickel-chromium-cobalt alloy, belonging to the technical field of nickel-based superalloy. The method comprises the following steps: ① hot working: heating the casting blank to 1120+/-10 ℃ and preserving heat, and then carrying out thermal processing deformation with the deformation amount of 10-15%; ② recrystallization: heating the blank along with a furnace to 1160+/-10 ℃, preserving heat, and carrying out recrystallization treatment to obtain a blank of ASTM 3-5 grade grains; ③ thermal deformation: deforming at 1110+/-20 ℃ to obtain total deformation of 70-90%, and air-cooling to room temperature; ④ Solid solution aging treatment: heat preservation is carried out for 8-9 h at 1100+/-10 ℃, rapid cooling is carried out to 860+/-10 ℃ for 15-16 h, and then air cooling is carried out. The nickel-chromium-cobalt alloy obtained by the invention has good plasticity and higher strength at room temperature and high temperature, and has better durability and creep resistance.
Description
Technical Field
The invention belongs to the technical field of nickel-based superalloy, and relates to a thermomechanical treatment method of nickel-chromium-cobalt alloy.
Background
Nickel-based superalloys have excellent performance characteristics and are widely used in critical components of aircraft engines, such as combustion chambers, turbine discs, blades, and the like. In recent years, with the continuous development of aviation industry in China, the requirement on the high-temperature performance of aviation materials is increasingly increased, the materials are required to have certain lasting strength, creep strength, thermal fatigue strength and corresponding toughness at high temperature, the high Wen Lihua performances are closely related to the composition phase and the precipitate of the materials, and the deformation and heat treatment process determines the composition phase and the precipitate of the materials.
The conventional processing method of the nickel-based superalloy is that a casting blank is rolled (forged) after being homogenized, and the casting blank is subjected to solid solution and aging (depending on components) to reach the use standard, so that the process is longer and the cost is high. In practice, the homogenization, rolling (forging) and other steps are all performed at high temperatures, so that a thermo-mechanical treatment method can be designed to complete the strengthening process by skillfully controlling the dislocation substructure formed during deformation.
Disclosure of Invention
In order to solve the technical problems, the invention provides a thermo-mechanical treatment method of nickel-chromium-cobalt alloy, so as to improve the strength and the fatigue life of the material.
In order to achieve the aim of the invention, the technical scheme adopted by the invention is as follows: a thermo-mechanical treatment method of nickel-chromium-cobalt alloy, which comprises the procedures of hot working, recrystallization, thermal deformation and solid solution aging treatment;
(1) And (3) a hot working procedure: heating the casting blank to 1120+/-10 ℃ and preserving heat, and then carrying out thermal processing deformation, wherein the total deformation is 10-15%;
(2) And (3) a recrystallization procedure: charging the blank after the thermal processing deformation while the blank is hot, heating to 1160+/-10 ℃ along with the furnace, and preserving heat for 20-50 h to obtain the blank with ASTM 3-5 level grains;
(3) Thermal deformation process: thermally deforming the blank at 1110+/-20 ℃ to obtain a total deformation of 70-90%, and then air-cooling to room temperature;
(4) Solid solution aging treatment procedure: heating the blank to 1110+/-10 ℃ for heat preservation for 8-9 h, rapidly cooling to 860+/-10 ℃ for heat preservation for 15-16 h, and finally air cooling to room temperature.
The heat processing procedure is that the casting blank is heated to 760+/-10 ℃ for heat preservation for 2-4 hours, then heated to 1120+/-10 ℃ at 1-2 ℃/min, and the heat preservation is carried out for [ (3-5) ×the diameter or thickness (mm) ] min.
And in the solid solution aging treatment process, the blank is heated to 760+/-10 ℃ and is kept for 1-2 hours, and then is heated to 1110+/-10 ℃ at 5 ℃/min.
And in the solid solution aging treatment process, the blank is rapidly cooled from 1110+/-10 ℃ to 860+/-10 ℃ for 0.5-1 h.
The nickel-chromium-cobalt alloy comprises the following chemical components in percentage by mass ：C:0.05～0.10%、Mn≤0.25%、Si≤0.25%、S≤0.006%、P≤0.010%、Cr:18～20%、Co:17～19%、Mo:3.7～4.2%、Al:2.5～3.5%、Ti:2.5～3.5%, and the balance of Ni and unavoidable impurities.
The nickel-chromium-cobalt alloy obtained by the method meets the condition of normal temperature, and has tensile strength sigma b: 1146-1486 MPa, yield strength sigma 0.2: 786-1045 MPa, impact toughness 186-245 a K/kJ/m2; tensile strength sigma b at 600℃: 1053-1380 MPa, yield strength sigma 0.2: 737-963 MPa; the creep performance under the conditions of 750 ℃ and 375MPa and the creep time of 300h is 0.8-1.4 percent.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in: the invention can lead the nickel-chromium-cobalt high-temperature alloy matrix to have good tissue morphology, the alloy deforms under the process and can generate evenly dispersed sliding, and finally, a polygonal dislocation substructure is formed, so that the high-temperature and high-temperature performance of the alloy is greatly improved.
Detailed Description
Example 1
The chemical components and mass percentages of the nickel-chromium-cobalt alloy electroslag ingot with the diameter of 350 mm multiplied by 1200mm in the embodiment are shown in table 7, and the thermo-mechanical treatment steps are as follows:
1) And (3) hot working: after the casting blank is put into a furnace, heating to 760 ℃ for 3 hours, preserving heat for 3 hours, heating to 1130 ℃ for 4 hours, and preserving heat for 1400 minutes; discharging from the furnace, forging, wherein the final forging temperature is 1110 ℃, forging 4 fires, and forging into square billets with the specification of 290 multiplied by 290mm, wherein the total deformation is 10%;
2) And (3) recrystallizing: putting a square billet with the diameter of 290mm by 290mm into a furnace when the square billet is hot, heating to 1160 ℃, and preserving heat for 32 hours to obtain ASTM 4-grade grains;
3) Thermal deformation: discharging square billets with the diameter of 290 multiplied by 290mm, forging the square billets at the temperature of 1090-1130 ℃, forging the square billets into round bars with the specification of phi of 100 multiplied by 1500mm through 14 fire forging, and air cooling the round bars to the room temperature, wherein the total deformation is 70%;
4) Solid solution aging treatment: charging the round bar material, heating to 760 ℃ for 2 hours, preserving heat for 1.5 hours, heating to 1110 ℃ for 8 hours, cooling to 860 ℃ within 45 minutes, preserving heat for 15.5 hours, and finally air cooling.
After the treatment of the procedures, performance detection is carried out on the round bar, and the results are shown in the following table:
table 1-1: example 1 tensile and impact Properties of the samples
Table 1-2: example 1 sample durability
Tables 1-3: example 1 sample creep properties
Tables 1 to 4: example 1 fatigue Property of sample
Example 2
The chemical components and mass percentages of the nickel-chromium-cobalt alloy electroslag ingot with the diameter of phi 220 mm and 1500mm are shown in Table 7, and the thermo-mechanical treatment steps are as follows:
1) And (3) hot working: after casting blank is put into a furnace, heating to 770 ℃ for 3 hours, preserving heat for 2 hours, heating to 1130 ℃ for 3 hours, and preserving heat for 660 minutes; discharging from the furnace, forging, wherein the final forging temperature is 1110 ℃, forging 4 fires, and forging into square billets with the specification of 180 multiplied by 180mm, wherein the total deformation is 15%;
2) And (3) recrystallizing: feeding a square billet with the diameter of 180 multiplied by 180mm into a furnace when the square billet is hot, heating to 1170 ℃, and preserving heat for 20 hours to obtain ASTM 5-level grains;
3) Thermal deformation: discharging square billets with the diameter of 180 multiplied by 180mm from a furnace, forging the square billets at the temperature of 1090-1130 ℃, forging the square billets into round bars with the diameter of phi 90 multiplied by 1500mm by 12 fire, and air-cooling the round bars to the room temperature, wherein the total deformation is 90%;
4) Solid solution aging treatment: and (3) charging the round blank, heating to 770 ℃ for 2 hours, preserving heat for 1 hour, heating to 1100 ℃ for 8.5 hours, cooling to 850 ℃ within 30 minutes, preserving heat for 15 hours, and finally air cooling.
After the treatment of the procedures, performance detection is carried out on the round bar, and the results are shown in the following table:
Table 2-1: example 2 tensile and impact Properties of the sample
Table 2-2: example 2 sample durability
Table 2-3: example 2 sample creep properties
Tables 2 to 4: example 2 fatigue Property of samples
Example 3
The chemical components and mass percentages of the nickel-chromium-cobalt alloy electroslag ingot with the diameter of 450 mm and the diameter of 1000mm are shown in Table 7, and the thermo-mechanical treatment steps are as follows:
1) And (3) hot working: after casting blank is put into a furnace, the temperature is raised to 750 ℃ for 5 hours, the heat is preserved for 4 hours, the temperature is raised to 1130 ℃ for 5 hours, and the heat is preserved for 2250min; discharging from the furnace, forging, wherein the final forging temperature is 1110 ℃, forging 6 fires, and forging into square billets with the specification of 380 multiplied by 380mm, wherein the total deformation is 15%;
2) And (3) recrystallizing: putting a square billet with 380X 380mm into a furnace when the square billet is hot, heating to 1170 ℃, and preserving heat for 50 hours to obtain ASTM 3-level grains;
3) Thermal deformation: discharging a square billet with 380 multiplied by 380mm, forging at 1090-1130 ℃, forging into a billet with the specification of 210 multiplied by 210mm by 22 fire, and air-cooling to room temperature, wherein the total deformation is 80%;
4) Solid solution aging treatment: charging the blank, heating to 750 ℃ for 4 hours, preserving heat for 2 hours, heating to 1120 ℃ for 9 hours, cooling to 870 ℃ within 1 hour, preserving heat for 16 hours, and finally air cooling.
After the treatment of the procedures, performance detection is carried out on the round bar, and the results are shown in the following table:
Table 3-1: example 3 tensile and impact Properties of the samples
Table 3-2: example 3 sample durability
Table 3-3: example 3 sample creep properties
Tables 3 to 4: example 3 fatigue Property of samples
Example 4
The chemical compositions and mass percentages of the nickel-chromium-cobalt alloy electroslag ingots with 220 multiplied by 360 multiplied by 1300mm of the example are shown in Table 7, and the thermo-mechanical treatment steps are as follows:
1) And (3) hot working: after casting blank is put into a furnace, heating to 760 ℃ for 3 hours, preserving heat for 3 hours, heating to 1130 ℃ for 4 hours, and preserving heat for 1440 minutes; discharging from the furnace, forging, wherein the final forging temperature is 1110 ℃, forging 4 fires, and forging into flat blanks with the specification of 300 multiplied by 220mm, wherein the total deformation is 12%;
2) And (3) recrystallizing: feeding the 300 multiplied by 220mm flat blank into a furnace while the flat blank is hot, heating to 1150 ℃, and preserving heat for 28 hours to obtain ASTM 4-grade grains;
3) Thermal deformation: discharging a 300 multiplied by 220mm flat blank, forging the flat blank at 1090-1130 ℃, forging the flat blank into round bars with the specification phi of 100 multiplied by 1500mm through 16 fire forging, and air cooling the flat blank to room temperature, wherein the total deformation is 75%;
4) Solid solution aging treatment: charging the round blank, heating to 760 ℃ for 2 hours, preserving heat for 1.5 hours, heating to 1110 ℃ for 8 hours, cooling to 860 ℃ within 45 minutes, preserving heat for 16 hours, and finally air cooling.
After the treatment of the procedures, performance detection is carried out on the round bar, and the results are shown in the following table:
Table 4-1: example 4 tensile and impact Properties of the sample
Table 4-2: example 4 sample durability
Table 4-3: example 4 sample creep properties
Tables 4-4: example 4 fatigue Property of samples
Example 5
The chemical components and mass percentages of the nickel-chromium-cobalt alloy electroslag ingot with the diameter of 150 mm multiplied by 800mm in the embodiment are shown in table 7, and the thermo-mechanical treatment steps are as follows:
1) And (3) hot working: after the casting blank is put into a furnace, heating to 760 ℃ for 3 hours, preserving heat for 3 hours, heating to 1120 ℃ for 4 hours, and preserving heat for 500 minutes; discharging from the furnace, forging, wherein the final forging temperature is 1110 ℃, forging 3 fires, and forging into square billets with the specification of 100 multiplied by 100mm, wherein the total deformation is 14%;
2) And (3) recrystallizing: feeding a square billet with the size of 100 multiplied by 100mm into a furnace when the square billet is hot, heating to 1160 ℃, and preserving heat for 30 hours to obtain ASTM 4-grade grains;
3) Thermal deformation: discharging a square billet with the diameter of 100 multiplied by 100mm from a furnace, forging the square billet at the temperature of 1090-1130 ℃, forging the square billet into round bars with the diameter of 60 multiplied by 800mm by 8 fire, and air-cooling the round bars to the room temperature, wherein the total deformation is 85%;
4) Solid solution aging treatment: and (3) charging the round bar material, heating to 760 ℃ for 2 hours, preserving heat for 1 hour, heating to 1110 ℃ for 9 hours, cooling to 850 ℃ within 30 minutes, preserving heat for 15 hours, and finally air cooling.
Table 5-1: example 5 tensile and impact Properties of the sample
Table 5-2: example 5 sample durability
Table 5-3: example 5 sample creep properties
Tables 5 to 4: example 5 fatigue Property of samples
Example 6
The chemical compositions and mass percentages of the 320×500×1500mm nickel-chromium-cobalt alloy electroslag ingots of this example are shown in Table 7, and the thermo-mechanical treatment steps are as follows:
1) And (3) hot working: after casting blank is put into a furnace, heating to 760 ℃ for 3 hours, preserving heat for 4 hours, heating to 1110 ℃ for 4 hours, and preserving heat for 1560 minutes; discharging from the furnace, forging, wherein the final forging temperature is 1110 ℃, forging 6 fires, and forging into flat blanks with the specification of 400 multiplied by 300mm, wherein the total deformation is 10%;
2) And (3) recrystallizing: feeding the 400X 300mm flat blank into a furnace while the flat blank is hot, heating to 1160 ℃, and preserving heat for 35 hours to obtain ASTM 5-grade grains;
3) Thermal deformation: discharging a 400 multiplied by 300mm flat blank, forging at 1090-1130 ℃, forging by 22 fires, forging into round bars with the specification phi of 150 multiplied by 1500mm, wherein the total deformation is 90%, and air-cooling to room temperature;
4) Solid solution aging treatment: charging the round bar material, heating to 760 ℃ for 2 hours, preserving heat for 2 hours, heating to 1110 ℃ for 8 hours, cooling to 850 ℃ within 55 minutes, preserving heat for 16 hours, and finally air cooling.
Table 6-1: example 6 tensile and impact Properties of the sample
Table 6-2: example 6 sample durability
Table 6-3: example 6 sample creep property
Table 6-4: example 6 fatigue Property of sample
Table 7: chemical composition and content (wt%) of NiCr Co alloy of each example
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Claims (5)
1. A method for thermomechanical treatment of a nickel-chromium-cobalt alloy, characterized by: comprises the procedures of hot working, recrystallization, thermal deformation and solid solution aging treatment;
(1) And (3) a hot working procedure: heating the casting blank to 1120+/-10 ℃ and preserving heat, and then carrying out thermal processing deformation, wherein the total deformation is 10-15%;
(2) And (3) a recrystallization procedure: charging the blank after the thermal processing deformation while the blank is hot, heating to 1160+/-10 ℃ along with the furnace, and preserving heat for 20-50 h to obtain the blank with ASTM 3-5 level grains;
(3) Thermal deformation process: thermally deforming the blank at 1110+/-20 ℃ to obtain a total deformation of 70-90%, and then air-cooling to room temperature;
(4) Solid solution aging treatment procedure: heating the blank to 1110+/-10 ℃ for heat preservation for 8-9 h, rapidly cooling to 860+/-10 ℃ for heat preservation for 15-16 h, and finally air cooling to room temperature;
the nickel-chromium-cobalt alloy comprises the following chemical components in percentage by mass ：C:0.05～0.10%、Mn≤0.25%、Si≤0.25%、S≤0.006%、P≤0.010%、Cr:18～20%、Co:17～19%、Mo:3.7～4.2%、Al:2.5～3.5%、Ti:2.5～3.5%, and the balance of Ni and unavoidable impurities.
2. A method of thermomechanical treatment of a nickel-chromium-cobalt alloy according to claim 1, characterized in that: the heat processing procedure is that the casting blank is heated to 760+/-10 ℃ for heat preservation for 2-4 hours, then heated to 1120+/-10 ℃ at 1-2 ℃/min, and the heat preservation is carried out for [ (3-5) ×the diameter or thickness (mm) ] min.
3. A method of thermomechanical treatment of a nickel-chromium-cobalt alloy according to claim 2, characterized in that: and in the solid solution aging treatment process, the blank is heated to 760+/-10 ℃ and is kept for 1-2 hours, and then is heated to 1110+/-10 ℃ at 5 ℃/min.
4. A method of thermomechanical treatment of a nickel-chromium-cobalt alloy according to claim 3, characterized in that: and in the solid solution aging treatment process, the blank is rapidly cooled from 1110+/-10 ℃ to 860+/-10 ℃ for 0.5-1 h.
5. The method for thermomechanical treatment of nickel-chromium-cobalt alloy according to claim 4, wherein: the nickel-chromium-cobalt alloy obtained by the method meets the condition of normal temperature, and has tensile strength sigma b: 1146-1486 MPa, yield strength sigma 0.2: 786-1045 MPa, impact toughness 186-245 a K/kJ/m2; tensile strength sigma b at 600℃: 1053-1380 MPa, yield strength sigma 0.2: 737-963 MPa; the creep performance under the conditions of 750 ℃ and 375MPa and the creep time of 300h is 0.8-1.4 percent.
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| CN108893689A (en) * | 2018-06-20 | 2018-11-27 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Inconel718 alloy disc forging homogenizes manufacturing method |
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| CN111394620A (en) * | 2020-05-08 | 2020-07-10 | 华能国际电力股份有限公司 | Machining and forming process of high-strength nickel-based high-temperature alloy bar |
| CN111471897A (en) * | 2020-05-08 | 2020-07-31 | 华能国际电力股份有限公司 | Preparation and forming process of high-strength nickel-based high-temperature alloy |
| CN112708802A (en) * | 2020-12-11 | 2021-04-27 | 西安聚能高温合金材料科技有限公司 | High-temperature-resistant material for tool and die and preparation method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108893689A (en) * | 2018-06-20 | 2018-11-27 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Inconel718 alloy disc forging homogenizes manufacturing method |
| CN111020298A (en) * | 2019-12-23 | 2020-04-17 | 西部超导材料科技股份有限公司 | GH3039 high-temperature alloy bar and preparation method thereof |
| CN111394620A (en) * | 2020-05-08 | 2020-07-10 | 华能国际电力股份有限公司 | Machining and forming process of high-strength nickel-based high-temperature alloy bar |
| CN111471897A (en) * | 2020-05-08 | 2020-07-31 | 华能国际电力股份有限公司 | Preparation and forming process of high-strength nickel-based high-temperature alloy |
| CN112708802A (en) * | 2020-12-11 | 2021-04-27 | 西安聚能高温合金材料科技有限公司 | High-temperature-resistant material for tool and die and preparation method thereof |
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