A Heat Treatment Process of High Plasticity Nickel-Based Alloy

A nickel-based alloy and high-plasticity technology, which is applied in the field of heat treatment of high-plasticity nickel-based alloys, can solve problems such as poor plasticity of the alloy, increase in the reduction of area, and increase in the elongation of the alloy, so as to achieve strength improvement, process time reduction, and improvement. The effect of production efficiency

Active Publication Date: 2018-03-09
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a heat treatment process for high-plasticity nickel-base alloys, which solves the shortcoming of poor plasticity of Ni-Co-Cr type nickel-base powder alloys, compared with existing data , can increase the elongation of the alloy by 35-40%, and the reduction of area by 30-35%; the present invention does not affect the strength of the alloy; compared with the traditional process, the improved heat treatment system is often shortened from 43 hours to 25 hours, Reduced cost, more suitable for industrial production

Method used

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  • A Heat Treatment Process of High Plasticity Nickel-Based Alloy
  • A Heat Treatment Process of High Plasticity Nickel-Based Alloy
  • A Heat Treatment Process of High Plasticity Nickel-Based Alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0029] In the implementation of this example, 1) Prepare nickel-based powder alloys according to the following mass percentages: Co: 15.3%, Cr: 9.4%, Al: 4.7%, Ti: 1.8%, W: 5.2%, Mo: 4.1%, C: 0.43 %, Nb: 2.6, Hf: 0.23%, B: 0.010, Ni balance;

[0030] 2) The above-mentioned nickel-based powder alloy is treated by solid solution and aging process, and vacuum induction melting and electroslag remelting are used to obtain 800*Ф80 rods with surface roughness Ra<1.6, which are processed into metal powder by PREP powder making equipment. Put it into the package and carry out hot isostatic pressing;

[0031] 3) Heat-treat the hot isostatic pressed alloy strip sheath obtained in step 2), perform solution treatment at 1040°C, keep it in a muffle furnace for 2 hours, then take it out and air-cool it to room temperature, and then heat it at 780°C Aging is carried out, and the aging time is 8 hours; after that, the temperature is lowered to 680°C at a rate of 0.6°C / min, and the temperatur...

Embodiment 2

[0033] In the implementation of this example, 1) Prepare nickel-based powder alloys according to the following mass percentages: Co: 15.4%, Cr: 9.6%, Al: 4.8%, Ti: 1.7%, W: 5.5%, Mo: 3.8%, C: 0.36 %, Nb: 2.5, Hf: 0.26%, B: 0.008, Ni balance;

[0034] 2) The above-mentioned nickel-based powder alloy is subjected to vacuum induction melting and electroslag remelting to obtain a 700*Ф70 bar with a surface roughness Ra<1.6, which is processed into metal powder by PREP milling equipment, and then put into a sheath , for hot isostatic pressing;

[0035] 3) heat-treat the nickel-based powder alloy alloy strip sheath after hot isostatic pressing in step 2), perform solution treatment at 1060 ° C, keep it in the muffle furnace for 5 hours, then take it out and air-cool it to room temperature, and then place it in the , aging at 750°C for 7 hours; then lower the temperature to 610°C at a rate of 0.3°C / min, hold for 7 hours, and the entire heat treatment lasts 25 hours. Table 3 is the ...

Embodiment 3

[0037] In the implementation of this example, 1) Prepare nickel-based powder alloys according to the following mass percentages: Co: 15.6%, Cr: 9.1%, Al: 4.9%, Ti: 1.8%, W: 5.3%, Mo: 3.8%, C: 0.35 %, Nb: 2.5, Hf: 0.22%, B: 0.011, Ni balance;

[0038] 2) The above-mentioned nickel-based powder alloy is treated by solid solution and aging process, and vacuum induction melting and electroslag remelting are used to obtain 800*Ф80 rods with surface roughness Ra<1.6, which are processed into metal powder by PREP powder making equipment. It is then packed into a package for hot isostatic pressing;

[0039] 3) heat-treat the hot isostatically pressed alloy strip sheath obtained in step 2), perform solution treatment at 1070°C, keep it in a muffle furnace for 1 hour, then take it out and air-cool it to room temperature, and then heat it at 800°C Aging is carried out, and the aging time is 8 hours; after that, the temperature is lowered to 680°C at a rate of 1°C / min, and the temperatur...

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Abstract

A heat-treatment technology of a high-plasticity nickel base alloy comprises following steps: firstly, the temperature of the alloy rises, then, low-temperature solid-solution treatment is carried out, and after the alloy keeps warm for a certain period, air cooling is carried out; two-stage low-temperature aging is carried out; and the technical problems that the alloy is poor in plasticity and too long in heat treatment duration are solved. The strength of the alloy prepared through the method is slightly improved, the plasticity is obviously improved, the rising amplitude reaches 30 % to 35%, the heat treatment duration is one half of the original heat treatment duration, and the heat treatment time is greatly shortened.

Description

technical field [0001] The invention relates to a heat treatment process for a high-plasticity nickel-based alloy. Background technique [0002] Nickel-based alloys have a series of advantages such as high service temperature, high creep performance, high durability performance, and high high temperature oxidation resistance, and are widely used in aeroengines, gas turbines and other fields. Nickel-based powder alloy is a new type of alloy. Compared with traditional casting and forging alloys, it has a series of advantages such as no macro-segregation, fine grains, uniform structure, and low cost, and can manufacture some alloys with poor hot workability. At present, it has become a necessary material for the key hot end parts of aerospace engines. Well-known institutions and enterprises including NASA, GE, P&W, Rolls-Royce, etc. are all developing advanced powder superalloys. At present, the world's most advanced military and civilian aircraft, such as A320, A330, B777, B7...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/10C22C19/05C22C1/04
CPCC22C1/0433C22C19/056C22F1/10
Inventor 闫飞王庆相韩志宇梁书锦张平祥左振博相敏王琦莫茗锟
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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