GH3230高温合金的热变形行为研究  

Study on hot deformation behavior of GH3230 superalloy

作　　者：何绍祥 薛松[1] 邓瑞 许明龙 李泽农 李荣超 张颍 李钱坤 HE Shao-xiang;XUE Song;DENG Rui;XU Ming-long;LI Ze-nong;LI Rong-chao;ZHANG Ying;LI Qian-kun(School of Manufacturing Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学制造科学与工程学院,四川绵阳621010

出　　处：《塑性工程学报》2025年第4期191-198,共8页Journal of Plasticity Engineering

摘　　要：通过高温拉伸实验研究了GH3230高温合金在温度800~950℃、拉伸速率6~120 mm·min^(-1)条件下的高温热变形行为。构建了高温变形本构模型,计算出平均变形激活能,并分析了微观组织和断口附近力学性能的变化。结果表明:GH3230高温合金的流变应力随着变形温度的增加和变形速率的降低而减小,且温度越高,变形达到稳定阶段的时间越短。GH3230高温合金的高温流变行为可用Zener-Hollomon参数的双曲正弦函数来描述,热变形材料常数为:A=1.734×10^(21),α=0.00203,n=6.73486,平均变形激活能Q=521.40751 kJ.mol^(-1)。随着温度的升高和变形速率的减小,GH3230高温合金的断后伸长率显著提升,塑性变好,但抗拉强度和硬度减小。The high-temperature hot deformation behavior of GH3230 superalloy was studied through high-temperature tensile tests at temperatures of 800-950℃and tensile rates of 6-120 mm·min^(-1).A high-temperature deformation constitutive model was constructed,the average deformation activation energy was calculated,and the changes of microstructure and mechanical properties near the fracture were analyzed.The results show that the flow stress of GH3230 superalloy decreases with the increase of deformation temperature and the decrease of tensile rate,and the higher the temperature,the shorter the time for deformation to reach the stable stage.The high-temperature rheological behavior of GH3230 superalloy can be described by the hyperbolic sine function of Zener-Hollomon parameters.The hot deformation material constants are:A=1.734×10^(21),α=0.00203,n=6.73486,and the average deformation activation energy Q=521.40751 kJ·mol-1.As the temperature increases and the deformation rate decreases,the elongation after fraction of GH3230 superalloy increases significantly and the plasticity becomes better,but the tensile strength and hardness decrease.

关 键 词：GH3230高温合金 热变形 本构模型 微观组织 力学性能 

分 类 号：TG113[金属学及工艺—物理冶金]