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GH2132 alloy and preparation method thereof

A GH2132 alloy technology, applied in the field of metal material preparation, can solve the problem that the yield strength of GH2132 alloy is difficult to further increase, and achieve the effects of shortening the production cycle, increasing the yield strength, and uniform grain size

Active Publication Date: 2021-11-23
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved in the present invention is to overcome defects such as the difficulty in further improving the yield strength of the GH2132 alloy in the prior art, thereby providing a preparation method of the GH2132 alloy

Method used

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  • GH2132 alloy and preparation method thereof
  • GH2132 alloy and preparation method thereof
  • GH2132 alloy and preparation method thereof

Examples

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Effect test

Embodiment 1

[0054] This embodiment provides a method for preparing a GH2132 alloy, which specifically includes the following steps,

[0055] Put the raw materials of GH2132 alloy at 1510°C for vacuum melting, and then cast them into ingots; then carry out electroslag remelting of the ingots, control the working current 8000A, voltage 60V, the slag used is CaF 2 -AlO-CaO-MgO, the remelted ingot is forged and billeted, and a 130mm×130mm square billet is obtained after air cooling; wherein, the initial forging temperature of forging billet is 1050°C, and the final forging temperature is 950°C.

[0056] Grind the surface of the billet clean to make it bright and smooth without any defects such as cracks visible to the naked eye, then heat to 1000°C, preheat for 100 minutes, then heat to 1210°C, soak at 1210°C for 140 minutes, and then control the initial rolling The temperature is 1090°C, and hot rolling is carried out for multiple passes until it is rolled into a Ф13 wire rod; the final roll...

Embodiment 2

[0060] This example provides a method for preparing a GH2132 alloy. The difference from Example 1 is that this example changes the holding time of the intermediate pretreatment from 30 minutes to 60 minutes, and the others are the same as Example 1.

[0061] Figure 4 is the SEM image of the alloy material after intermediate pretreatment, indicating that the alloy sample with γ' phase precipitation is obtained after intermediate pretreatment; Figure 5 It is the SEM picture of the alloy material after aging heat treatment, indicating that after aging heat treatment, a large number of alloy materials with γ' phase precipitation in the size of 20-30mm have been obtained.

Embodiment 3

[0063] This example provides a method for preparing a GH2132 alloy. The difference from Example 1 is that in this example, the temperature of the intermediate pretreatment is changed from 650°C to 600°C, and the others are the same as in Example 1.

[0064] Alloy samples with γ' phase precipitation were obtained after intermediate pretreatment, and a large amount of alloy materials with γ' phase precipitation were obtained after aging heat treatment.

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Abstract

The invention belongs to the technical field of metal material preparation, and particularly relates to a GH2132 alloy and a preparation method thereof. The preparation method at least comprises the steps of solid solution heat treatment, intermediate pretreatment and aging heat treatment. The temperature of the intermediate pretreatment is 600-650 DEG C, the time is 30-60 min, the grain size of the GH2132 alloy obtained through the method is 9-10 grades, the grain size is uniform, the yield strength is at least 780 MPa, the tensile strength is at least 1090 MPa, compared with GH2132 in the prior art, the yield strength, the tensile strength and other properties are remarkably improved, and meanwhile, the alloy further has good ductility.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and in particular relates to a GH2132 alloy and a preparation method thereof. Background technique [0002] GH2132 is a Fe-15Cr-25Ni-based high-temperature alloy, and on this basis, alloying elements such as Mo, Ti, Al, V and trace B are added for comprehensive strengthening. It belongs to precipitation hardening stainless steel. It still maintains good strength and oxidation resistance, and also has good machinability. Due to the many excellent properties of GH2132, this alloy is often used in structural materials in aerospace and other major fields. Such as various fasteners under high temperature and high load, common fasteners such as bolts need to bear tensile stress and bending stress at the same time when they work stably under stress relaxation conditions, and their materials should have high yield strength, plasticity and toughness , while the GH2132 alloy can meet i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D6/00C22C38/02C22C38/04C22C38/06C22C38/42C22C38/46C22C38/44C22C38/50C22C38/54C22C38/60
CPCC21D6/004C21D6/005C21D6/008C22C38/02C22C38/04C22C38/06C22C38/42C22C38/46C22C38/44C22C38/50C22C38/54C22C38/60C22C38/007C22C38/002
Inventor 胡显军许满伟廖岳太成建强刘建民方峰
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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