摘要
探索了固溶温度与时间对GH4169合金晶粒长大行为的影响,测试了不同固溶温度下合金的拉伸及冲击性能。结果表明：GH4169合金在低于1020℃固溶,残留δ相阻碍晶粒长大,固溶保温时间越短,晶粒不均匀因子增加越明显。当固溶温度高于1020℃,δ相充分溶解,不同保温时间下的晶粒不均匀因子都显著降低。随晶粒尺寸的增加,GH4269合金拉伸性能降低,但冲击韧性随固溶温度增加而增加。这主要是晶界上δ相的回溶,避免了裂纹沿晶界扩展。
The effects of solution temperature and time on the grain growth behavior of GH4169 alloy were investigated.The tensile and impact properties of the alloy at different solid solution temperatures were tested. The results show that whenthe solution temperature is lower than 1020 ℃, the remained phase prevents grain growth. The shorter the solution holdingtime is, the more obviously the grain inhomogeneity factor increases. When the solid solution temperature is higher than 1020℃, phase dissolves fully. The grain inhomogeneity factors are significantly reduced under different holding time. The tensileproperties of GH4269 alloy decrease with the increase of the grain size. But the impact toughness increases with the increaseof solution temperature. This is mainly the reversion of the phase on grain boundary, avoiding the crack propagation alongthe grain boundaries.
作者
王蓬书
李琴敏
韦贤毅
梁宇
WANG Pengshu1, LI Qinmin, WEI Xianyi1, LIANG Yu(1. School of Materials and Metallurgy, Guizhou University, Guiyang 550025, China; 2. Guizhou Key Laboratory for Mechanical Behavior and Microstmeture of Materials, Guiyang 550025, Chin)
出处
《热加工工艺》
CSCD
北大核心
2018年第4期245-249,共5页
Hot Working Technology
基金
国家自然科学基金项目(51461007)
贵州省重大应用基础研究项目(黔科合JZ字[2014]2003)
贵州省重点攻关项目(黔科合GZ字(2015)3012)
贵州大学SRT项目(贵大SRT字[2014]173号)
关键词
GH4169合金
固溶温度
晶粒尺寸
力学性能
GH4169 alloy
solid solution temperature
grain size
mechanical properties
作者简介
王蓬书（1994-），男，贵州安顺人，主要从事金属材料结构性能研究；电话：18786616014；E—mail：m18786616014-@163．com;梁宇（1978-），男，教授；主要从事金属材料结构性能与相变研究；电话：15519022177；E—mail：xq．1iangyu@126．com
