| Effect of heat treatment on microstructure and high temperature tensile properties of cast nickel-base superalloy with high W, Mo and Nb contents |
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| 作者姓名： | 殷凤仕 孙晓峰 袁超 管恒荣 胡壮麒 |
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| 作者单位： | InstituteofMetalResearch,TheChineseAcademyofSciences,Shenyang110016,China; |
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| 摘 要： | The microstructural features and high temperature tensile properties of M963 superaUoy at as-cast, as-solutioned and as-aged conditions were investigated in detail. The results show that the solution treatment at 1220℃ for 4 h,AC causes an increase in high temperature yield strength but a drastic drop in high temperature ductility due to the precipitation of both the secondary carbide M6C along grain boundaries and at the interdendritic regions and very fine γ‘ particles in the dendrite cores. Aging treatment following the solution treatment can improve the high temperature tensile properties of M963 superalloy due to the coaraing of the γ’ precipitate. One stage aging at 850℃ for 16 h following the solution treatment causes an increase in both strength and ductility d alloy M963, and two-stage aging of 1089 ℃/2 h, AC plus 850℃/16 h, AC following the solution treatment further increases the ductility d alloy M963 but slightly decreases its strength.
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| 关 键 词： | 热处理 显微组织 机械性能 铸造镍基耐热合金 高温张力性能 钨 钼 铌 |
Effect of heat treatment on microstructure and high temperature tensile properties of cast nickel-base superalloy with high W, Mo and Nb contents |
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| Abstract: | |
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| Keywords: | cast nickel base superalloy mechanical properties microstructure heat treatment |
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