异步轧制SIMA法制备半固态AM60镁合金的组织研究  

Microstructure of Semi-solid AM60 Magnesium Alloy Prepared by Asynchronous Rolling SIMA Method

作　　者：姜龙 郑小平 宋进英 田亚强 陈连生 JIANG Long;ZHENG Xiaoping;SONG Jinying;TIAN Yaqiang;CHEN Liansheng(College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, China)

机构地区：[1]华北理工大学冶金与能源学院

出　　处：《热加工工艺》2019年第19期20-22,29,共4页Hot Working Technology

基　　金：国家自然科学基金项目(51474091,51574107);河北省自然科学基金项目(E2017209121);河北省高等学校科学技术研究项目(ZD2018242)

摘　　要：采用异步轧制SIMA法制备了AM60半固态坯料,分析了轧前预热保温时间和半固态保温时间对半固态成形的影响,研究了异步轧制SIMA法制备半固态AM60镁合金的组织演化。结果表明:当轧制温度480℃和轧前预热时间12 min,半固态处理温度580℃和保温时间40 min时,半固态液相率高,固相颗粒均匀、圆整。异步轧制细化了铸态组织晶粒,为后续半固态形成提供了更多的形变储存能。Semi-solid AM60 magnesium alloy billet was prepared by asynchronous rolling SIMA method.The effect of preheating time before rolling and semi-solid holding time on semi-solid formation was analyzed.The microstructurs evolution of semi-solid AM60 magnesium alloy prepared by asynchronous rolling SIMA method as studied.The results show that when the rolling tempereture is 480℃,the preheating time before rolling is 12 min and the semi-solid treatment is temperature of 580℃for 40 min,the semi-solid liquid phase rate is high,and the solid particles are uniform and round.The asynchronous rolling refines the grain size of as-cast microstructure and provides more deformation storage energy for the subsequent semi-solid microstructure forming.

关 键 词：异步轧制 应变诱导熔化激活(SIMA)法 轧前预热温度 半固态保温时间 AM60镁合金 

分 类 号：TG335.19[金属学及工艺—金属压力加工] TG146.22[一般工业技术—材料科学与工程]