用低过热度浇注技术制备半固态ZL101-Sc铝合金  

Research on Semi-Solid ZL101-Sc Alloy Prepared by Low Superheat Pouring

作　　者：刘政[1,2] 石凯[3] 陈明[3] 

机构地区：[1]江西理工大学机电工程学院,江西赣州341000 [2]江西省有色金属加工技术工程研究中心,江西赣州341000 [3]江西理工大学材料与化学工程学院,江西赣州341000

出　　处：《铸造》2009年第7期662-665,670,共5页Foundry

基　　金：江西省自然科学基金项目资助(0650047);江西省教育厅科技项目(GJJ09229)

摘　　要：利用低过热度浇注工艺制备了ZL101-Sc铝合金半固态浆料,研究了Sc对半固态合金初生α-Al形貌的影响。采用正交设计方法研究了半固态ZL101-Sc铝合金初生α-Al形貌的影响因素。结果表明,经Sc细化及低过热度浇注(620℃)获得的半固态ZL101初生球晶的最佳工艺条件为保温温度590℃,保温时间200 s,Sc加入量0.6%。此时其晶粒在铸态下的形状因子为0.95,等效圆直径为27.45μm,其中保温温度是晶粒形貌和尺寸的最主要影响因素,可信度达95%;其次是Sc的加入量和保温时间。The semi-solid slurry of ZL101-Sc alloy was manufactured by low superheat pouring, and the effect of Sc on morphology of primary α-Al in ZL101 alloy was researched. The experiment conditions that influence morphology of primary α-Al in semi-solid ZL101 AI alloy were studied by adopting orthogonal design. The results show that the primary α-Al with globular-like can be obtained by Sc refinement treatment and low superheat pouring. The best holding temperature, holding time and Sc content are 590 ℃, 200 s and about 0.6%, respectively. Under these conditions, the average shape factor of primary α-Al in ZL101 AI alloy is 0.95, and its average equal-area-circle grain diameter is 27.45 μm. Among these factors, the most important one is holding temperature, at which the reliability is 95%; the second one is the Sc content and holding time, respectively.

关 键 词：钪 半固态 ZL101铝合金 初生Α-AL 低过热度浇注 

分 类 号：TG249.9[金属学及工艺—铸造]