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Heat treatment method of GH4780 alloy forging

A heat treatment method, solid solution heat treatment technology, applied in the direction of engine components, blade support components, mechanical equipment, etc., can solve the problems of lack of heat treatment process for GH4780 alloy forgings, so as to promote dynamic recrystallization, eliminate voids, and refine grains Effect

Active Publication Date: 2019-11-22
BEIJING CISRI GAONA TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to use the forging process for preparation; however, there is currently a lack of reports on the heat treatment process of GH4780 alloy forgings

Method used

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  • Heat treatment method of GH4780 alloy forging
  • Heat treatment method of GH4780 alloy forging
  • Heat treatment method of GH4780 alloy forging

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The heat treatment method of GH4780 alloy forgings includes the following steps:

[0068] 1. Carry out solution heat treatment on GH4780 alloy forgings, the temperature of the solution heat treatment is 1080℃, the time of solution heat treatment is 1h, and then the first cooling is carried out, the first cooling methods are air cooling, oil cooling and water cooling;

[0069] 2. The product obtained in step 1 is subjected to aging heat treatment, the temperature of the aging heat treatment is 800°C for 8 hours, and then air cooling is performed.

[0070] The mechanical properties of the GH4780 alloy device obtained after the heat treatment of the GH4780 alloy forging by the heat treatment method of this embodiment are stretched at room temperature and stretched at 760°C are shown in Table 1 and Table 2, respectively:

[0071] Table 1

[0072]

[0073] Table 2

[0074]

Embodiment 2

[0076] The heat treatment method of GH4780 alloy forgings includes the following steps:

[0077] 1. Carry out solution heat treatment on GH4780 alloy forgings, the temperature of the solution heat treatment is 1070℃, the time of solution heat treatment is 1h, and then air cooling;

[0078] 2. The product obtained in step 1 is subjected to aging heat treatment, the temperature of the aging heat treatment is 800°C for 8 hours, and then air cooling is performed.

[0079] The mechanical properties of the GH4780 alloy device obtained after the heat treatment of the GH4780 alloy forging using the heat treatment method of this embodiment are stretched at room temperature and at 760°C, respectively, as shown in Table 3 below:

[0080] table 3

[0081]

Embodiment 3

[0083] The heat treatment method of GH4780 alloy forgings includes the following steps:

[0084] 1. Carry out solution heat treatment on GH4780 alloy forgings, the temperature of the solution heat treatment is 1163℃, the time of solution heat treatment is 1h, and then air cooling;

[0085] 2. The product obtained in step 1 is subjected to aging heat treatment, the temperature of the aging heat treatment is 800 ℃, the time is 8 hours, and then air cooling is performed.

[0086] The mechanical properties of the GH4780 alloy device obtained after the heat treatment of the GH4780 alloy forging using the heat treatment method of this embodiment are stretched at room temperature and at 760°C, respectively, as shown in Table 4 below:

[0087] Table 4

[0088]

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Abstract

The invention provides a heat treatment method of a GH 4780 alloy forging, and relates to the technical field of alloy manufacturing. The method comprises the following step: carrying out solution heat treatment on the GH 4780 alloy forging, wherein the temperature of the solution heat treatment is 1020-1170 DEG C. The GH 4780 alloy forging subjected to heat treatment not only can effectively eliminate the segregation of alloy elements such as Ti, Al and Cr in the smelting process and eliminate metallurgical defects such as cavities, but also can break columnar crystals and promote dynamic recrystallization, thereby refining the crystal grains and improving the strength and plasticity of the alloy forging.

Description

Technical field [0001] The present invention relates to the technical field of alloy manufacturing, in particular to a heat treatment method of GH4780 alloy forgings, and more specifically, to a heat treatment method of GH4780 alloy forgings, GH4780 alloy devices, gas turbine nozzles and gas turbines. Background technique [0002] GH4780 alloy is a nickel-based superalloy, which has good high-temperature mechanical properties and high-temperature oxidation resistance. Its service temperature reaches 760℃. Its castings are mainly used for gas turbine nozzle materials. At present, GH4780 alloy castings are prepared by casting process at home and abroad. GH4780 alloy castings prepared by casting process are prone to element segregation, voids and other metallurgical defects, which restrict the use of GH4780 alloy. Therefore, it is necessary to use the forging process to prepare; however, there is currently a lack of reports on the heat treatment process of GH4780 alloy forgings. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/10C22C19/05F01D5/02F01D5/28F01D9/02F01D9/04F01D25/24
CPCC22C19/055C22F1/10F01D5/02F01D5/286F01D9/02F01D9/04F01D25/24
Inventor 曲敬龙谢兴飞张国栋杜金辉冯勇张华刘向宏吴永安谷雨安腾唐超毕中南
Owner BEIJING CISRI GAONA TECH
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