Heat treatment process of nickel base single crystal superalloy

A high-temperature alloy and nickel-based single crystal technology, which is applied in post-processing, single crystal growth, single crystal growth, etc., can solve the problems of lower application value, lower initial melting temperature, lower alloy strength, etc., and achieve excellent durability, initial The effect of increasing the melting temperature and improving the application value

Inactive Publication Date: 2015-07-01
QINGDAO YUGUANG PRECISION CASTING FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improper heat treatment process will reduce the strength of the alloy, reduce the initial melting temperature, and reduce the application value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] The heat treatment process of the nickel-based single crystal superalloy of this embodiment includes the following steps:

[0019] (1) Homogenization: 1245°C, heat preservation for 2 hours;

[0020] (2) Solution treatment: 1275°C, heat preservation for 4 hours;

[0021] (3) Primary aging: 1100°C, heat preservation for 2 hours;

[0022] (4) Secondary aging: 850°C, heat preservation for 24h;

[0023] (5) Cooling method: air cooling.

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PUM

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Abstract

The invention discloses a heat treatment process of nickel base single crystal superalloy. A differential thermal analysis method and metallographic test method are used to determine the incipient melting temperature of the alloy at 1280 DEG C; and an optical metalloscope is used for observation of the microstructure of alloy after different solid solution treatments, and the stress rupture properties of the alloy are tested. The results show that optimum heat treatment process of the alloy is as below: 1245 DEG C / 2h, AC+1275 DEG C / 4h, AC+1100 DEG C / 2h, AC+850 DEG C / 24h, AC. The single crystal superalloy treated by the process has excellent durability, and creep rupture life reaching 159.35h under 980 DEG C and 235MPa.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to a heat treatment process of a nickel-based single crystal superalloy. [0003] Background technique [0004] Superalloys have high high temperature strength, good oxidation resistance and hot corrosion resistance, excellent creep and fatigue resistance, good structural stability and reliability, and are widely used in aviation, aerospace, nuclear engineering and other equipment It is widely used in military fields such as power, and in civil fields such as energy, transportation, petrochemical and metallurgy. With the development of aero-engines, the performance requirements for high-temperature materials are also increasing. Improper heat treatment process will reduce the strength of the alloy, reduce the initial melting temperature, and reduce the application value. [0005] Contents of the invention [0006] In order to overcome the above-mention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B33/02C30B29/52C22F1/10C22C19/03
Inventor 陈玉光
Owner QINGDAO YUGUANG PRECISION CASTING FACTORY
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