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Heat treatment method of gh4096 alloy forging, obtained forging and its application

A heat treatment method and solution heat treatment technology, which is applied in the field of alloy manufacturing, can solve the problems of small margin of high-temperature creep performance, achieve excellent strength, suppress coarsening, and improve creep performance

Active Publication Date: 2022-07-19
BEIJING CISRI GAONA TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first purpose of the present invention is to provide a heat treatment method for GH4096 alloy forgings, so as to solve the technical problems of GH4096 alloy forgings in the prior art such as the small margin of high temperature creep performance

Method used

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  • Heat treatment method of gh4096 alloy forging, obtained forging and its application
  • Heat treatment method of gh4096 alloy forging, obtained forging and its application
  • Heat treatment method of gh4096 alloy forging, obtained forging and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0073] This embodiment provides a method for GH4096 alloy turbine disk forging, including the following steps:

[0074] (1) Using vacuum induction melting + electroslag remelting continuous directional solidification and solidification preparation specifications are diameter The GH4096 alloy ingot is obtained, and then the ingot is subjected to homogenization heat treatment and then constrained blanking and 3D overall forging to prepare a forging billet. Grade 9; then the forging billet is subjected to die forging to obtain a forging, and the die forging heating temperature is 1070 ℃.

[0075] (2) subjecting the forging obtained in step (1) to solution heat treatment and aging heat treatment. Specifically, the solution heat treatment includes: charging the forging at a temperature below 650 °C, heating the forging at a rate of 120 °C / h to 950 °C and holding for 2 hours, Subsequently, it was heated to 1080°C at a rate of 60°C / h for 3 hours, then cooled to 980°C at a rate of 7...

Embodiment 2

[0079] This embodiment provides a method for GH4096 alloy turbine disk forging, including the following steps:

[0080] (1) Using vacuum induction melting + electroslag remelting continuous directional solidification and solidification preparation specifications are diameter The GH4096 alloy ingot is obtained, and then the ingot is subjected to homogenization heat treatment and then constrained blanking and 3D overall forging to prepare a forging billet. Grade 9; then the forging billet is subjected to die forging to obtain a forging, and the die forging heating temperature is 1070 ℃.

[0081](2) subjecting the forging obtained in step (1) to solution heat treatment and aging heat treatment. Specifically, the solution heat treatment includes: charging the forging at a temperature below 650 °C, heating the forging at a rate of 120 °C / h to 950 °C and holding for 2 hours, Subsequently, it was heated to 1080°C at a rate of 60°C / h for 3 hours, then cooled to 980°C at a rate of 40...

experiment example 1

[0110] In order to further verify the performance difference of the forgings prepared by different embodiments and comparative examples of the present invention after heat treatment, the creep properties of the GH4096 alloy forgings prepared by each embodiment and comparative example were tested, and the test results are shown in Table 1.

[0111] Table 1 Creep performance test results of different GH4096 alloy forgings

[0112]

[0113]

[0114] It can be seen from the above test results that the GH4096 alloy forgings prepared by the heat treatment method of the present invention have more excellent high temperature creep properties and durability properties.

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Abstract

The invention relates to the technical field of alloy manufacturing, in particular to a heat treatment method for a GH4096 alloy forging, a prepared forging and an application thereof. The heat treatment method includes: performing solution heat treatment and aging heat treatment on the GH4096 alloy forgings; the solution heat treatment includes: keeping the temperature at 900-1000°C for 1-3 hours, and then keeping the temperature at 1050-1080°C for 1-4 hours; then at 40-100°C / min Cool down to 950-1050°C at a cooling rate, and then cool down to below 400°C at a cooling rate of 100-250°C / min; aging heat treatment includes: keeping at 600-650°C for 1-3h, and then keeping at 730-760°C for 2-6h; Then cool to room temperature. The invention improves the creep properties of GH4096 alloy forgings at 700°C and above by adjusting the solid solution and aging heat treatment processes, and simultaneously meets the standard requirements of other comprehensive mechanical properties.

Description

technical field [0001] The invention relates to the technical field of alloy manufacturing, in particular to a heat treatment method of a GH4096 alloy forging, the prepared forging and application thereof. Background technique [0002] GH4096 is a new type of deformed nickel-based superalloy with good comprehensive mechanical properties at high temperature. It is used to prepare turbine rotating parts for aerospace engines. Forgings in the fine-grained state are usually subjected to sub-solid solution and aging heat treatment to obtain forgings that meet the requirements. In the prior art, during the cooling process in the sub-solid solution heat treatment, a very fast cooling rate is used to obtain an intragranular cooling secondary γ' phase with as small a size as possible. This kind of forging usually has high strength, but the internal residual stress of the forging is high. Very large, with a small margin for creep performance at 700°C and above. However, there is sti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/10C21D9/00C22C19/05F01D5/02
CPCC22F1/10C21D9/0068C22C19/056C22F1/002F01D5/02
Inventor 李福林程荣辉付锐伏宇田伟张少平钟燕谭海兵白云瑞孟令超余斌田志凌冯滌
Owner BEIJING CISRI GAONA TECH