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GH2132 high-temperature alloy and heat treatment method for improving hardness of GH2132 high-temperature alloy

A technology of GH2132 and heat treatment method, applied in the field of heat treatment of GH2132 superalloy and improving the hardness of GH2132 superalloy, can solve the problems of low plasticity and insufficient hardness, achieve excellent tensile strength, good plasticity and cutting performance, and overcome notch sensitivity sexual effect

Active Publication Date: 2022-07-01
JIANGXI BAOSHUNCHANG SPECIAL ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat treatment method usually adopted for GH2132 superalloy is solid solution at 980°C for 2h+aging at 720°C for 16h. However, when this heat treatment method is used in the conventional formula of GH2132 alloy, it often leads to low plasticity, insufficient hardness, and notch sensitivity of the alloy after heat treatment. sex

Method used

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  • GH2132 high-temperature alloy and heat treatment method for improving hardness of GH2132 high-temperature alloy
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  • GH2132 high-temperature alloy and heat treatment method for improving hardness of GH2132 high-temperature alloy

Examples

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Effect test

Embodiment 1

[0028] A GH2132 superalloy round bar blank with a size of 120*1500mm, made from the following raw materials by mass fraction: Ni: 24.0%, C: 0.01%, Cr: 13.5%, Ti: 1.75%, Al: 0.1% , Mn: 1.5%, Si: 0.8%, B: 0.00%, and the balance is Fe; the heat treatment method to improve its hardness includes the following steps:

[0029] S1. One-time charging: put five GH2132 superalloy round bar blanks into the solution treatment furnace. When loading the furnace, the interval between the round bar blanks is 50mm, and the middle of the round bar blanks is separated by refractory bricks. The present invention The amount of furnace charging before solution treatment should not be too large, because GH2132 has many high-temperature alloy elements, poor thermal conductivity, and slow microstructure transformation. During the heating process, the transformation of the bar in the center of the tray is incomplete, and there may be a considerable amount of it. The γ' is not dissolved in the matrix, re...

Embodiment 2

[0037] A GH2132 superalloy round bar blank with a size of 50*1000mm, made of the following raw materials by mass fraction: Ni: 24.5%, C: 0.02%, Cr: 14.5%, Ti: 1.85%, Al: 0.1% , Mn: 1.32%, Si: 0.2%, B: 0.005%, and the balance is Fe; the heat treatment method for improving its hardness includes the following steps:

[0038] S1. One-time furnace loading: 20 GH2132 superalloy round bar blanks of the above size are loaded into the solution treatment furnace. When loading the furnace, the interval between the round bar blanks is 50mm, and the middle of the round bar blanks is separated by refractory bricks , In the present invention, the amount of furnace charging before solution treatment should not be too large, because GH2132 has many high-temperature alloy elements, poor thermal conductivity, and slow microstructure transformation. A considerable amount of γ' is not dissolved in the matrix, resulting in the precipitation and distribution of the γ' phase not meeting the requireme...

Embodiment 3

[0046] A GH2132 superalloy round bar blank with a size of 120*1500mm, made from the following raw materials by mass fraction: Ni: 25.0%, C: 0.01%, Cr: 15%, Ti: 1.95%, Al: 0.1% , Mn: 1.2%, Si: 0.1%, B: 0.006%, and the balance is Fe; the heat treatment method for improving the hardness is the same as that in Example 1.

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Abstract

The invention provides a GH2132 high-temperature alloy which comprises the following raw materials in percentage by mass: 24.0-27.0% of Ni, less than or equal to 0.08% of C, 13.5-16.0% of Cr, 1.75-2.30% of Ti, less than or equal to 0.4% of Al, less than or equal to 2.0% of Mn, less than or equal to 1.0% of Si, less than or equal to 0.03% of P, less than or equal to 0.02% of S, 0.001-0.01% of B and the balance of Fe. The invention further provides a heat treatment method for improving the hardness of the GH2132 high-temperature alloy. Compared with the prior art, the GH2132 high-temperature alloy has the following advantages that firstly, the GH2132 high-temperature alloy is reasonably prepared, so that the GH2132 high-temperature alloy has good heat stability, heat resistance, plasticity and cutting machining performance after being subjected to a heat treatment process; and secondly, by adopting a two-stage heating solution treatment process, an aging treatment process and a supplementary aging treatment process, the GH2132 high-temperature alloy blank subjected to heat treatment can have excellent tensile strength, yield strength and hardness, so that the notch sensitivity of the GH2132 high-temperature alloy is overcome.

Description

technical field [0001] The invention relates to the field of superalloy production, in particular to a GH2132 superalloy and a heat treatment method for improving the hardness of the GH2132 superalloy. Background technique [0002] The GH2132 alloy is a 15Cr-25Ni-Fe age-hardening iron-based superalloy strengthened by Al, Ti and Mo. After heat treatment, its structure is a γ' strengthening phase with fine particles dispersed on the austenite γ matrix, so it has Good thermal stability, thermal strength, good plasticity and machinability, stable organization and performance when working at a temperature of 550-650 °C for a long time. It is widely used in parts that work for a long time at high temperature. The heat treatment method usually used for GH2132 superalloy is 980°C solution for 2h + 720°C aging for 16h, but when this heat treatment method is used in the conventional formulation of GH2132 alloy, it often leads to low plasticity, insufficient hardness, and notch sensiti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/00C22C38/02C22C38/04C22C38/06C22C38/50C22C38/54
CPCC21D6/004C21D6/005C21D6/008C22C38/02C22C38/04C22C38/06C22C38/50C22C38/54
Inventor 季宏伟廉斌林玉
Owner JIANGXI BAOSHUNCHANG SPECIAL ALLOY CO LTD
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