SIMA法工艺参数对7075铝合金半固态组织的影响  

Effects of SIMA Process Parameters on Microstructures of Semi-solid 7075 Aluminum Alloy

作　　者：李春晓[1] 赵丹[1] 郑小平[1] 田亚强[1] 宋进英[1] 陈连生[1] 

机构地区：[1]河北联合大学冶金与能源学院,河北唐山063009

出　　处：《热加工工艺》2015年第11期22-24,32,共4页Hot Working Technology

基　　金：国家自然科学基金项目(51474091);河北省自然科学基金项目(E2013209268);河北省高等学校科学技术研究项目(Q2012011)

摘　　要：利用应变诱发熔化激活法(SIMA)制备了7075铝合金半固态坯料。分别研究了变形程度、半固态加热温度与保温时间对7075铝合金半固态坯料显微组织的影响。结果表明:变形程度越大,再结晶形核率越高,获得的半固态固相颗粒越均匀、细小;半固态加热温度越高,则半固态组织的固相颗粒越细小,液相率越高;当保温时间为30 min时,固相颗粒球化最好、最均匀。7075 aluminum alloy semi-solid blanks were prepared by the strain-induced melt activation technology（SIMA）. Effects of the deformation degree, heating temperature and holding time on microstructures of 7075 aluminum alloy semi-solid blanks were studied separately. The results show that the greater the degree of deformation is, the higher the recrystallization nucleation rate is, and the more uniform and the finer the solid particles of semisolid are. The higher the semi-solid heating temperature is, the finer the solid particles of semi-solid are, and the higher the liquid fraction is. When the holding time is 30 min, balling of the solid particle is the best and the most uniform.

关 键 词：应变诱发熔化激活法(SIMA) 工艺参数 7075铝合金 半固态显微组织 

分 类 号：TG316[金属学及工艺—金属压力加工]