时效处理对QBe2合金弯曲变形与微观组织的影响  

Influences of Aging Treatment on Bending Deformation and Microstructure of QBe2 Alloy

作　　者：袁明华[1] 刘俊伟[1] 肖燕妮 侯建宝[1] 董显娟[1] 李鑫[1] 

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063 [2]北京卫星制造厂,北京100190

出　　处：《矿冶工程》2016年第1期108-110,113,共4页Mining and Metallurgical Engineering

基　　金：江西省青年科学基金(20141522040222);江西省科技支撑项目(20141122040007);江西省自然科学基金(20122BAB216015);燕山大学亚稳材料制备技术与科学国家重点试验室开放课题(201405);上海航天科技创新基金(SAST201328);航天科技创新基金(BA201401259);江西省金属材料微结构调控重点试验开放课题(LW201101)

摘　　要：通过三点弯曲实验和金相分析,研究了时效处理对QBe2合金弯曲变形与微观组织的影响。结果表明,相同状态下(硬态、半硬态),在300,350,400,450℃下进行时效处理,随温度升高,QBe2合金最大弯曲变形应力均比原始试样减小;硬态、400℃/4 h时效处理后合金的最大弯曲应力最小,为23.52 GPa;时效后硬态铍青铜的抗弯曲变形效果比半硬态好;随时效温度升高,组织内γ相含量、晶界反应量不断增多。The influence of aging treatment on the bending deformation and microstructure of QBe2 alloy was studied by three point bending test and metallographic analysis. The results show that after aging treatment at 300 ℃, 350 ℃, 400 ℃ and 450 ℃ under the same conditions （ such as hard and semi-hard state）, the maximum bending stress of QBe2 alloy reduced with the temperature rise compared to the original sample. The maximum bending stress turned to be minimum （23.52 GPa） after aging at 400 ℃ for 4 h in hard state. It was also found that the hard beryllium bronze had higher bending deformation resistance than the semi-hard state after aging. The grain boundary reaction and γ phase content also increased with an increase in aging temperature.

关 键 词：QBE2 时效处理 弯曲变形 微观组织 

分 类 号：TG115[金属学及工艺—物理冶金]