固溶工艺对GH690合金组织和硬度的影响  

Effects of Solution Process on Microstructure and Hardness of GH690 Alloy

作　　者：姬忠超 张莹[1] 陈志英 李英杰 李禧 JI Zhongchao;ZHANG Ying;CHEN Zhiying;LI Yingjie;LI Xi(Schoo l of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学材料工程学院,上海201620 [2]上海工程技术大学机械与汽车工程学院,上海201620

出　　处：《热加工工艺》2020年第2期132-136,共5页Hot Working Technology

基　　金：上海工程技术大学研究生科研创新资助项目(17KY0501);上海工程技术大学科研启动基金项目(校启2015-06);上海高校青年教师培养资助计划项目(ZZGCD15035);上海市大型铸锻件协同创新中心项目(ZF1225).

摘　　要：研究了不同固溶温度和保温时间对GH690合金微观组织和性能的影响规律。结果表明:GH690合金的晶粒尺寸随固溶温度的升高或保温时间的延长而增大,当温度超过1100℃时,晶粒长大速度加快;合金中的碳化物随固溶温度升高或者保温时间延长溶解增多,当温度超过1150℃后,合金中的碳化物被全部溶解;合金的硬度随固溶温度升高或保温时间延长逐渐降低,保温时间对合金硬度的影响弱于固溶温度对合金硬度的影响。The effects of solution temperature and holding time on the microstructure and properties of GH690 alloy were studied.The results show that,the grain size of GH690 alloy increases with the increase of solution temperature or holding time.When the temperature is above 1100℃,the grain growth rate is accelerated.The content of carbide dissolved in the alloy increases with the increase of the solution temperature or the prolongation of the holding time.When the temperature exceeds 1150℃,the carbide in the alloy is completely dissolved.The hardness of the alloy decreases gradually with the increase of the solution temperature or the prolongation of the holding time.The effect of the holding time on the hardness of the alloy is weaker than that of the solution temperature on the hardness of the alloy.

关 键 词：GH690合金 固溶处理 显微组织 硬度 

分 类 号：TG156.94[金属学及工艺—热处理] TG132.3[金属学及工艺—金属学]