半固态温度区电磁搅拌对Al-25%Si合金显微组织影响  

Influence of Electromagenetic Stirring in Semi-Solid Temperature Area on Microstructure of Al-25%Si Alloy

作　　者：王凯[1] 张家涛[1] 孙淑红[1] 彭著刚[1] 樊刚[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《昆明理工大学学报（理工版）》2005年第2期24-27,共4页Journal of Kunming University of Science and Technology(Natural Science Edition)

基　　金：云南省自然科学基金(项目编号:2001E0011M).

摘　　要：在半固态温度区域对Al-25%Si合金施加电磁搅拌,从组织形貌上看,随搅拌时间的延长初晶Si的边角逐渐钝化;初晶Si的分布变得更均匀.搅拌时间为30min时,初晶Si微观形貌最圆整,分布最均匀.金属型抗拉试棒断口基本上为解理性断口,半固态铸造合金试棒断口中出现了较多的韧性断裂区带和韧窝.The influence of electromagenetic stirring in Semi-Solid temperature area on the microstructure of Al-25%Si alloy is mainly discussed. As stirring time goes, the side or angle of primary Si becomes desensitized; the distribution of primary Si becomes more homogeneous. When stirring time is 30 minutes, distribution of the microstructure of primary Si is most homogeneous. Tensile test sample section of Al-25%Si made in metallic pattern is cleavageous and the tensile test sample section of SSM is ductile fracture or toughness nest.

关 键 词：半固态 过共晶Al-25%Si合金 初晶SI 断口 

分 类 号：TF11[冶金工程—冶金物理化学]