铝合金半固态浆料保温过程中组织演化研究  

Evolution of Particle Morphology of Semi-solid Al Alloy Slurry During Isothermal Holding

作　　者：曾怡丹[1] 郝新[1] 李艳芬[1] 许萍[1] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051

出　　处：《热加工工艺》2015年第5期28-31,35,共5页Hot Working Technology

基　　金：内蒙古自然科学基金项目(2009MS0804);内蒙古高等学校研究项目(NJ09065)

摘　　要：对保温过程中半固态浆料初生相的生长机制进行了研究。结果表明,初生相是由不同晶核长大而形成的,而不是由枝晶碎片熟化形成的;在优化的保温条件下,浆料内温度、浓度场是均匀的,初生相/液相界面满足相对稳定性条件,初生相形态为球状或近球状。The primary phase evolution mechanism of semi-solid alloy slurry during isothermal holding was studied. The results show that under the optimal isothermal holding, the primary phase is brought up by different crystal nucleus, rather than by ripening of dendrites. The temperature and concentration field in the slurry are uniform. The relative stability condition on interface between primary phase and liquid is met, so the primary phase morphology is spherical or near spherical shape.

关 键 词：半固态浆料 组织演化 保温处理 

分 类 号：TG292[金属学及工艺—铸造] TG249.9