热处理工艺对镍基合金排气阀组织和力学性能的影响  

Effects of Heat Treatment Process on Microstructure and Machanical Properties of Nickel-base Alloy Exhaust Valve

作　　者：明国建 刘承建 陈茂涛 马敏团[2] MING Guojian;LIU Chengjian;CHEN Maotao;MA Mintuan(Chongqing YueJin Machinery Co.,Ltd.,Yongchuan 402160,China;CSIC No.12 Research Institute,Xingping 713102,China)

机构地区：[1]重庆跃进机械厂有限公司,重庆永川402160 [2]中国船舶重工集团公司第十二研究所,陕西兴平713102

出　　处：《热加工工艺》2021年第24期117-119,126,共4页Hot Working Technology

基　　金：国家基础科研项目(DE7303)。

摘　　要：研究了固溶+时效工艺对NiCr20TiAl镍基高温合金排气阀组织和力学性能的影响。结果表明:当固溶温度从1000℃逐渐增加至1040℃、时效温度在760~820℃时,NiCr20TiAl排气阀在室温下的强度和硬度随着热处理温度的升高而增加;当固溶温度高于1040℃、时效温度超过820℃时,排气阀在室温下的强度和冲击吸收功明显下降,硬度变化不明显;当固溶温度在1000~1080℃时,排气阀在750℃高温下的强度随着固溶温度的升高而逐渐增加。The effects of solution+aging process on the microstructure and mechanical properties of NiCr20TiAl nickel-based superalloy were studied.The results show that when the solution temperature increases from 1000℃to 1040℃,the aging temperature from 760℃to 820℃,and the strength and hardness of the NiCr20TiAl exhaust valve at room temperature increase with the increase of heat treatment temperature.When the solution temperature is higher than 1040℃and the aging temperature is higher than 820℃,the strength and impact absorption energy at room temperature of the exhaust valve decrease obviously,but the hardness change is not obvious.When the solution temperature is between 1000℃and 1080℃,the strength at 750℃high temperature of the exhaust valve increases with the increase of solution temperature.

关 键 词：镍基合金 排气阀 固溶+时效 显微组织 力学性能 

分 类 号：TG162.7[金属学及工艺—热处理]