CN112795857A - Method for improving comprehensive performance of GH4169 alloy plate - Google Patents
Method for improving comprehensive performance of GH4169 alloy plate Download PDFInfo
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Abstract
The invention discloses a method for improving the comprehensive performance of a GH4169 alloy plate, which comprises the working procedures of complete solution treatment, cold rolling deformation treatment, precipitated phase heat treatment and standard double-aging treatment. Preserving the temperature of a GH4169 alloy plate at 1030-1060 ℃ for 1-3 h for complete solution treatment; the rolling deformation of the GH4169 alloy plate in the cold rolling deformation treatment is 30-40%; the GH4169 alloy plate is subjected to heat preservation for 1-2 hours at 940-960 ℃ to carry out precipitated phase heat treatment; the standard double aging treatment is to keep the temperature of the GH4169 alloy plate at 715-725 ℃ for 8h, then cool the plate to 615-625 ℃ at a rate of 50 ℃/h, keep the temperature for 8h, and finally cool the plate to room temperature in the air. The method improves the comprehensive properties, namely the strength and the plasticity of the GH4169 alloy plate, thereby prolonging the service life of the GH4169 alloy plate.
Description
Technical Field
The invention belongs to the technical field of high-temperature alloy plate blank preparation processes, and particularly relates to a method for improving the comprehensive performance of a GH4169 alloy plate.
Background
Nickel-based superalloys are widely used in the aerospace industry due to their excellent mechanical properties and their good corrosion resistance at high temperatures above 600 ℃. The GH4169 alloy is widely used in the manufacture of various parts of aircraft turbine engines, such as structural materials for compressor disks, blades, shafts, housings, fasteners, guide vanes, etc., because it has good mechanical stability up to 650 ℃.
With the development of economic technology, the performance requirements of nickel-based high-temperature alloys, particularly GH4169 alloys, are higher and higher, under the common treatment process, the yield strength, the tensile strength and the elongation of GH4169 are only about 880MPa, 1000MPa and 7% respectively, and the high performance requirements are difficult to meet, and in addition, the common treatment process can only improve the strength or only improve the plasticity, and the strength and the plasticity are difficult to be considered at the same time, so that a treatment method capable of improving the GH4169 strength and the GH4169 plasticity is necessary to be developed, namely a method capable of improving the comprehensive performance of the GH4169 alloy plate. The invention successfully realizes the great improvement of the strength and the plasticity of the GH4169 alloy plate by using a cold rolling deformation and reasonable heat treatment process.
Disclosure of Invention
The invention aims to provide a method for improving the comprehensive performance of a GH4169 alloy plate. The invention provides a preparation method which can improve the strength and plasticity of the GH4169 alloy plate based on a mode of combining cold deformation and heat treatment, thereby improving the comprehensive performance and prolonging the service life.
In order to solve the technical problems, the invention adopts the technical scheme that:
a method for improving the comprehensive performance of a GH4169 alloy plate comprises the working procedures of complete solution treatment, cold rolling deformation treatment, precipitated phase heat treatment and standard double aging treatment; in the complete solution treatment process, the GH4169 alloy plate is kept at 1030-1060 ℃ for 1-3 h; and the precipitated phase heat treatment process is to keep the temperature of the GH4169 alloy plate at 940-960 ℃ for 1-2 h.
In the cold rolling deformation treatment process, the cold rolling deformation of the GH4169 alloy sheet is 30-40%.
The standard double-aging treatment process comprises the steps of preserving heat of a GH4169 alloy plate for 8 hours at 715-725 ℃, then cooling the GH4169 alloy plate to 615-625 ℃ at a rate of 50 ℃/h in a furnace, preserving heat for 8 hours, and finally cooling the GH4169 alloy plate to room temperature in air.
The yield strength of the GH4169 alloy plate obtained by the method is 1005-1020 MPa, the tensile strength is 1067-1119 MPa, and the elongation is 10.5-14.5%.
The design idea of the invention is as follows: carrying out solution treatment on the GH4169 alloy plate at 1030-1060 ℃, so that a precipitated phase is dissolved back into a matrix, and the deformation resistance of the GH4169 alloy plate is reduced; and then performing cold rolling deformation of 30-40% to break partial crystal boundaries, generating a large amount of dislocation in crystal grains and improving the strength of the GH4169 alloy sheet. And then carrying out precipitated phase treatment at 940-960 ℃, wherein the temperature belongs to the precipitation temperature of the delta phase, and the precipitated phase treatment is carried out at the temperature, so that the precipitation of the delta phase is facilitated, and meanwhile, a large number of nucleation positions are provided for the delta phase due to a large number of dislocations and broken crystal boundaries introduced by cold rolling deformation, the nucleation energy of the delta phase is reduced, so that a large number of delta phases are precipitated in the crystal boundaries and the crystal boundaries, and the plasticity of the GH4169 alloy plate is greatly improved.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: 1. according to the invention, the deformation resistance of the GH4169 alloy plate is reduced by carrying out solution treatment at 1030-1060 ℃; and then performing cold rolling deformation of 30-40% to improve the strength of the GH4169 alloy sheet. 2. According to the invention, the GH4169 alloy plate is subjected to precipitation phase treatment at 940-960 ℃, so that the plasticity of the alloy plate is greatly improved; and then carrying out standard double aging treatment to precipitate a gamma' strengthening phase in the GH4169 alloy plate, and finishing the heat treatment. 3. The method improves the comprehensive performance of the GH4169 alloy plate: the yield strength is 1005-1020 MPa, the tensile strength is 1067-1119 MPa, and the elongation is 10.5-14.5%, so that the service life of the steel is prolonged.
Drawings
FIG. 1 is a scanning electron microscope image of an alloy plate of GH4169 of example 1 after precipitated phase treatment.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples.
Example 1
The method for improving the comprehensive performance of the GH4169 alloy sheet comprises the working procedures of complete solution treatment, cold rolling deformation treatment, precipitated phase heat treatment and standard double aging treatment, and the specific process steps are as follows:
(1) complete solution treatment process: the GH4169 alloy plate is subjected to heat preservation for 3 hours at 1060 ℃;
(2) cold rolling deformation treatment process: the cold rolling deformation of the GH4169 alloy plate is 40%;
(3) a precipitated phase heat treatment step: the GH4169 alloy plate is subjected to heat preservation for 2 hours at 960 ℃;
(4) and (3) standard double-aging treatment procedure: the GH4169 alloy plate is kept at 720 ℃ for 8h, then cooled to 621 ℃ in a furnace at a speed of 50 ℃/h, kept at the temperature for 8h, and finally cooled to room temperature in air.
The scanning electron microscope image of the GH4169 alloy plate subjected to the precipitation phase treatment in this example is shown in fig. 1, and it can be seen that a large amount of δ phase is precipitated in the crystal grain boundaries and the crystal interior of the GH4169 alloy plate. (examples 2-8 GH4169 alloy sheet after precipitated phase treatment FIGS. 2-8 are similar to FIG. 1 and thus are omitted.)
GH4169 alloy plate treated by the method of the embodiment is at 650 ℃ and 6.67X 10-4s-1The yield strength, tensile strength and elongation data measured by the uniaxial tensile test are shown in table 1, and the data show that the method can effectively improve the strength and plasticity of the GH4169 alloy sheet material, namely improve the comprehensive performance of the GH4169 alloy sheet material, thereby prolonging the service life of the GH4169 alloy sheet material.
Example 2
The method for improving the comprehensive performance of the GH4169 alloy sheet comprises the working procedures of complete solution treatment, cold rolling deformation treatment, precipitated phase heat treatment and standard double aging treatment, and the specific process steps are as follows:
(1) complete solution treatment process: the GH4169 alloy plate is subjected to heat preservation for 2 hours at 1040 ℃;
(2) cold rolling deformation treatment process: the cold rolling deformation of the GH4169 alloy plate is 35%;
(3) a precipitated phase heat treatment step: the GH4169 alloy plate is subjected to heat preservation for 1.5h at 950 ℃;
(4) and (3) standard double-aging treatment procedure: the GH4169 alloy plate is kept at 718 ℃ for 8h, then cooled to 617 ℃ in a furnace at a temperature of 50 ℃/h, kept at the temperature for 8h, and finally cooled to room temperature in the air.
GH4169 alloy plate treated by the method of the embodiment is at 650 ℃ and 6.67X 10-4s-1The yield strength, tensile strength and elongation data measured by the uniaxial tensile test are shown in table 1, and the data show that the method can effectively improve the strength and plasticity of the GH4169 alloy sheet material, namely improve the comprehensive performance of the GH4169 alloy sheet material, thereby prolonging the service life of the GH4169 alloy sheet material.
Example 3
The method for improving the comprehensive performance of the GH4169 alloy sheet comprises the working procedures of complete solution treatment, cold rolling deformation treatment, precipitated phase heat treatment and standard double aging treatment, and the specific process steps are as follows:
(1) complete solution treatment process: preserving the heat of a GH4169 alloy plate for 1h at 1030 ℃;
(2) cold rolling deformation treatment process: the cold rolling deformation of the GH4169 alloy plate is 30%;
(3) a precipitated phase heat treatment step: the GH4169 alloy plate is subjected to heat preservation for 1h at 940 ℃;
(4) and (3) standard double-aging treatment procedure: the GH4169 alloy plate is kept at 723 ℃ for 8h, then cooled to 622 ℃ at a speed of 50 ℃/h in a furnace, kept at the temperature for 8h, and finally cooled to room temperature in air.
GH4169 alloy plate treated by the method of the embodiment is at 650 ℃ and 6.67X 10-4s-1The yield strength, tensile strength and elongation data measured by uniaxial tensile test are shown in table 1, and the data show that the method of the embodiment can effectively improve the strength and plasticity of the GH4169 alloy sheet material, namely improve the GH4169 alloy sheet materialThe comprehensive performance of the material is improved, and the service life of the material is prolonged.
Example 4
The method for improving the comprehensive performance of the GH4169 alloy sheet comprises the working procedures of complete solution treatment, cold rolling deformation treatment, precipitated phase heat treatment and standard double aging treatment, and the specific process steps are as follows:
(1) complete solution treatment process: the GH4169 alloy plate is subjected to heat preservation for 2.5 hours at 1050 ℃;
(2) cold rolling deformation treatment process: the cold rolling deformation of the GH4169 alloy plate is 38%;
(3) a precipitated phase heat treatment step: the GH4169 alloy plate is subjected to heat preservation for 1.8h at 952 ℃;
(4) and (3) standard double-aging treatment procedure: the GH4169 alloy plate is kept at 719 ℃ for 8h, then furnace-cooled to 618 ℃ at a speed of 50 ℃/h, kept at the temperature for 8h, and finally cooled to room temperature in air.
GH4169 alloy plate treated by the method of the embodiment is at 650 ℃ and 6.67X 10-4s-1The yield strength, tensile strength and elongation data measured by the uniaxial tensile test are shown in table 1, and the data show that the method can effectively improve the strength and plasticity of the GH4169 alloy sheet material, namely improve the comprehensive performance of the GH4169 alloy sheet material, thereby prolonging the service life of the GH4169 alloy sheet material.
Example 5
The method for improving the comprehensive performance of the GH4169 alloy sheet comprises the working procedures of complete solution treatment, cold rolling deformation treatment, precipitated phase heat treatment and standard double aging treatment, and the specific process steps are as follows:
(1) complete solution treatment process: the GH4169 alloy plate is subjected to heat preservation for 1.5h at the temperature of 1045 ℃;
(2) cold rolling deformation treatment process: the cold rolling deformation of the GH4169 alloy plate is 33%;
(3) a precipitated phase heat treatment step: the GH4169 alloy plate is subjected to heat preservation for 1.2h at 943 ℃;
(4) and (3) standard double-aging treatment procedure: the GH4169 alloy plate is kept at 721 ℃ for 8h, then cooled to 619 ℃ at 50 ℃/h in a furnace, kept at 8h and finally cooled to room temperature in the air.
GH4169 alloy plate treated by the method of the embodiment is at 650 ℃ and 6.67X 10-4s-1The yield strength, tensile strength and elongation data measured by the uniaxial tensile test are shown in table 1, and the data show that the method can effectively improve the strength and plasticity of the GH4169 alloy sheet material, namely improve the comprehensive performance of the GH4169 alloy sheet material, thereby prolonging the service life of the GH4169 alloy sheet material.
Example 6
The method for improving the comprehensive performance of the GH4169 alloy sheet comprises the working procedures of complete solution treatment, cold rolling deformation treatment, precipitated phase heat treatment and standard double aging treatment, and the specific process steps are as follows:
(1) complete solution treatment process: the GH4169 alloy plate is subjected to heat preservation for 2.7 hours at the temperature of 1055 ℃;
(2) cold rolling deformation treatment process: the cold rolling deformation of the GH4169 alloy plate is 36%;
(3) a precipitated phase heat treatment step: the GH4169 alloy plate is subjected to heat preservation for 1.6h at 955 ℃;
(4) and (3) standard double-aging treatment procedure: the GH4169 alloy plate is kept at 716 ℃ for 8h, then furnace cooling is carried out at 50 ℃/h to 624 ℃, the temperature is kept for 8h, and finally the GH4169 alloy plate is cooled to room temperature in the air.
GH4169 alloy plate treated by the method of the embodiment is at 650 ℃ and 6.67X 10-4s-1The yield strength, tensile strength and elongation data measured by the uniaxial tensile test are shown in table 1, and the data show that the method can effectively improve the strength and plasticity of the GH4169 alloy sheet material, namely improve the comprehensive performance of the GH4169 alloy sheet material, thereby prolonging the service life of the GH4169 alloy sheet material.
Example 7
The method for improving the comprehensive performance of the GH4169 alloy sheet comprises the working procedures of complete solution treatment, cold rolling deformation treatment, precipitated phase heat treatment and standard double aging treatment, and the specific process steps are as follows:
(1) complete solution treatment process: the GH4169 alloy plate is subjected to heat preservation for 1.3h at the temperature of 1055 ℃;
(2) cold rolling deformation treatment process: the cold rolling deformation of the GH4169 alloy plate is 31%;
(3) a precipitated phase heat treatment step: the GH4169 alloy plate is subjected to heat preservation for 1.3h at 947 ℃;
(4) and (3) standard double-aging treatment procedure: the GH4169 alloy plate is kept at 715 ℃ for 8h, then cooled to 625 ℃ at a speed of 50 ℃/h in a furnace, kept at the temperature for 8h, and finally cooled to room temperature in air.
GH4169 alloy plate treated by the method of the embodiment is at 650 ℃ and 6.67X 10-4s-1The yield strength, tensile strength and elongation data measured by the uniaxial tensile test are shown in table 1, and the data show that the method can effectively improve the strength and plasticity of the GH4169 alloy sheet material, namely improve the comprehensive performance of the GH4169 alloy sheet material, thereby prolonging the service life of the GH4169 alloy sheet material.
Example 8
The method for improving the comprehensive performance of the GH4169 alloy sheet comprises the working procedures of complete solution treatment, cold rolling deformation treatment, precipitated phase heat treatment and standard double aging treatment, and the specific process steps are as follows:
(1) complete solution treatment process: the GH4169 alloy plate is subjected to heat preservation for 2.3h at 1042 ℃;
(2) cold rolling deformation treatment process: the cold rolling deformation of the GH4169 alloy plate is 39%;
(3) a precipitated phase heat treatment step: the GH4169 alloy plate is subjected to heat preservation for 1.9h at 958 ℃;
(4) and (3) standard double-aging treatment procedure: the GH4169 alloy plate is kept at 725 ℃ for 8h, then furnace cooling is carried out at 50 ℃/h to 615 ℃, the temperature is kept for 8h, and finally cooling is carried out in the air to the room temperature.
GH4169 alloy plate treated by the method of the embodiment is at 650 ℃ and 6.67X 10-4s-1The yield strength, tensile strength and elongation data measured by the uniaxial tensile test are shown in table 1, and the data show that the method can effectively improve the strength and plasticity of the GH4169 alloy sheet material, namely improve the comprehensive performance of the GH4169 alloy sheet material, thereby prolonging the service life of the GH4169 alloy sheet material.
TABLE 1 Performance indices of GH4169 alloy sheet after treatment in examples 1-8
Claims (7)
1. The method for improving the comprehensive performance of the GH4169 alloy plate is characterized by comprising the working procedures of complete solution treatment, cold rolling deformation treatment, precipitated phase heat treatment and standard double aging treatment; in the complete solution treatment process, the GH4169 alloy plate is kept at 1030-1060 ℃ for 1-3 h; and the precipitated phase heat treatment process is to keep the temperature of the GH4169 alloy plate at 940-960 ℃ for 1-2 h.
2. The method for improving the comprehensive performance of the GH4169 alloy sheet according to claim 1, wherein in the cold rolling deformation treatment step, the cold rolling deformation amount of the GH4169 alloy sheet is 30-40%.
3. The method for improving the comprehensive performance of the GH4169 alloy plate according to claim 1, wherein the standard double aging treatment process comprises the steps of keeping the temperature of the GH4169 alloy plate at 715-725 ℃ for 8h, cooling the GH4169 alloy plate to 615-625 ℃ at a speed of 50 ℃/h in a furnace, keeping the temperature for 8h, and finally cooling the GH4169 alloy plate to room temperature in air.
4. The method for improving the comprehensive performance of the GH4169 alloy sheet according to any one of claims 1 to 3, wherein the yield strength of the GH4169 alloy sheet obtained by the method is 1005-1020 MPa, the tensile strength is 1067-1119 MPa, and the elongation is 10.5-14.5%.
5. The method for improving the comprehensive performance of the GH4169 alloy sheet according to any one of claims 1-3, wherein the method comprises the steps of complete solution treatment, cold rolling deformation treatment, precipitation phase heat treatment and standard double aging treatment; the complete solution treatment process: the GH4169 alloy plate is subjected to heat preservation for 3 hours at 1060 ℃; the cold rolling deformation treatment process comprises the following steps: the cold rolling deformation of the GH4169 alloy plate is 40%; the precipitated phase heat treatment step: the GH4169 alloy plate is subjected to heat preservation for 2 hours at 960 ℃; the standard double aging treatment process comprises the following steps: the GH4169 alloy plate is kept at 720 ℃ for 8h, then cooled to 621 ℃ in a furnace at a speed of 50 ℃/h, kept at the temperature for 8h, and finally cooled to room temperature in air.
6. The method for improving the comprehensive performance of the GH4169 alloy sheet according to any one of claims 1-3, wherein the method comprises the steps of complete solution treatment, cold rolling deformation treatment, precipitation phase heat treatment and standard double aging treatment; the complete solution treatment process: the GH4169 alloy plate is subjected to heat preservation for 2 hours at 1040 ℃; the cold rolling deformation treatment process comprises the following steps: the cold rolling deformation of the GH4169 alloy plate is 35%; the precipitated phase heat treatment step: the GH4169 alloy plate is subjected to heat preservation for 1.5h at 950 ℃; the standard double aging treatment process comprises the following steps: the GH4169 alloy plate is kept at 718 ℃ for 8h, then cooled to 617 ℃ in a furnace at a temperature of 50 ℃/h, kept at the temperature for 8h, and finally cooled to room temperature in the air.
7. The method for improving the comprehensive performance of the GH4169 alloy sheet according to any one of claims 1-3, wherein the method comprises the steps of complete solution treatment, cold rolling deformation treatment, precipitation phase heat treatment and standard double aging treatment; the complete solution treatment process: preserving the heat of a GH4169 alloy plate for 1h at 1030 ℃; the cold rolling deformation treatment process comprises the following steps: the cold rolling deformation of the GH4169 alloy plate is 30%; the precipitated phase heat treatment step: the GH4169 alloy plate is subjected to heat preservation for 1h at 940 ℃; the standard double aging treatment process comprises the following steps: the GH4169 alloy plate is kept at 723 ℃ for 8h, then cooled to 622 ℃ at a speed of 50 ℃/h in a furnace, kept at the temperature for 8h, and finally cooled to room temperature in air.
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| CN115433892A (en) * | 2022-09-14 | 2022-12-06 | 贵州大学 | Method for simultaneously improving strength and plasticity of GH4169 high-temperature alloy plate |
| CN117683989A (en) * | 2024-02-02 | 2024-03-12 | 成都先进金属材料产业技术研究院股份有限公司 | High-temperature alloy sheet and preparation method thereof |
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