室温ECAP工业纯钛组织热稳定性研究  

Investigation of thermal stability of commercial pure Ti after ECAP at room temperature

作　　者：王幸运[1] 赵西成[1] 杨西荣[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《轻金属》2010年第3期48-50,共3页Light Metals

基　　金：国家自然科学基金项目(50874086);陕西省教育厅专项科研计划项目(07JK307);西安建筑科技大学重大科技项目创新基金资助项目

摘　　要：采用两通道夹角Φ=120°,外圆角Ψ=20°的模具在室温不采用中间退火条件下成功实现工业纯钛(TA1)高达8道次等径弯曲通道变形,制备出超细晶工业纯钛。研究了室温ECAP工业纯钛的组织热稳定性能。结果表明,ECAP变形后的工业纯钛组织在400℃以下保持较高的硬度,热稳定性较好,而在400℃以上,发生了再结晶,硬度急剧下降,热稳定性变差。A die with a internal angle Ф= 120°and an outer curvature angle Ф= 20°, without use annealing in the middle, successfully carried out in commercial pure Ti（gradel） an eight passes equal channel angular pressing （ECAP） at room temperature. Ultrained grain was obtained. The reerystallization annealing test at different temperatures was conducted. Microstructure and mechanical properties were studied. The results show that the ECAP commercial pure Ti has a high strength and good thermal stability below 400℃, but the strength decreases dramatically and the thermal stability becomes worse above 400℃ because of recrystallization.

关 键 词：等径弯曲通道变形(ECAP) 工业纯钍 再结晶退火 热稳定性 

分 类 号：TG146.23[一般工业技术—材料科学与工程]