ISSN:1000-8365 CN:61-1134/TG
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Effect of Solid Solution Treatment Temperature on the Microstructure and Mechanical Properties of GH738 Alloy
Author of the article:ZENG Weihu;ZHOU Xiaoming;FANG Bo;LI Zhao;NIU Jing;CAO Yichao;WANG Tao;SONG Xiyu
Author's Workplace:Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China;Shengyang Liming Aero Engines Co., Ltd., Shenyang 110043, China
Key Words:heat treatment GH738 alloy microstructure second phase
Abstract:
The microstructure and properties of GH738 alloy under different solid solution heat treatment systems were studied by means of metallographic microscope, scanning electron microscope and material testing machine. The results show that with the increase of the solid solution temperature, the grain size of the alloy will increase, the γ' phase which is not dissolved in the matrix decreased, and the new γ' phase will grow up. In the second phase of GH738 alloy, MC and M23C6 are mainly distributed in the crystal, while M23C6 is mainly distributed in the grain boundary. The tensile strength, yield strength and rockwell hardness of GH738 alloy decreased with the increase of the secondary solution temperature.