不同AI+Ti含量下GH738合金固溶温度范围的探讨

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Discussion on the solution temperature range of GH738 alloy under different Al+Ti contents

ZHOU Shixin， LU Yi，YANG Jiadian， XU Bing Guizhou Aviation Technical Development Co.，Ltd.，Guiyang 55oo81， Guizhou， China

Abstract： Experiments were conducted on GH738 alloy with different Al+Ti contents within the standard solution temperature range to investigate the microstructure and mechanical properties of the aloyat different solution temperatures. By comparison， the optimal solution temperature range for the microstructure and mechanical properties of GH738 alloy with different ΔAl+Ti contents were obtained. The results show that when the ΔAl+Ti content is lower，lowering the solution temperature appropriately can achieve a more uniform microstructure， but excessively low solution temperature can reduce the mechanical properties.When the Al+Ti content is higher，the solution temperature within the standard range has litle effect on the grain size of the forging，anda higher solution temperature can bechosen appropriatelyto achieve auniform forging structure with the beter mechanical properties.

Keywords： GH738; heat treatment; Al+Ti content; microstructure; mechanical properties

1序言

GH738镍基高温合金凭借其卓越的高温强度、优良的耐蠕变性能和抗氧化性能，在航空航天领域被广泛用于制造燃烧室、涡轮发动机叶轮、燃气涡轮、燃气轮机燃烧器和喷嘴等关键部件；在石油化工领域，其被应用于高温高压下的管道、阀门和反应器。（剩余6442字）