MgAl系镁合金半固态组织二次凝固特征-有色金属材料与工程.PDFVIP

32 1 V o.l 32, No. 1 2 0 1 1 3 SHANGHA INONFERROU SMETALS M arch, 2011 : 1005- 204 ( 2011) 01- 0010- 04 Mg-A l 1 2 王瑞权 , 黄海军 ( 1. , 310053; 2. , 730050) : 半固态浆料液相的凝固行为决定了其二次凝固组织, 这将直接影响半固态成形件的性 能Mg-A l系 合金随着成分凝固行为的不同, 其二次凝固组织有较大的不同该文描述了 Mg-A l系合金半固态浆料液相凝固过程以及二次凝固组织特征, 并针对其特征对其形成原因展 开了分析 : 合金; 半固态; 二次凝固; 组织特征 + : TF14 . 2 2 : A TheM icrostucture Characteristic of Secondary Solidfication in Sem-i solidM g-A l BasedMagnesium A lloys 1 2 WANG Ru-i quan , HUANG H a-i jun (1. S chool of M echan icalE ng ineering, Zhej iang Institute of M echan ical and E lec tricalE ng ineering, H angz hou 310053, Ch ina 2. School of M aterials Science and Eng ineering, L anzhou Un iversity of T echno logy, L anz hou 730050, Ch ina ) Abstract: The solidfication behavior of liqu id phase in sem-i solid slurry determ ines them icrostructure characteristics of secondary solidfication, wh ich w ill d irectly affect the performance of sem i-solid form ed parts. W ith d ifferences of composition and solidfication behavior, them icrostructure character- istics of secondary solidfication in Mg-A l basedm agnesium alloys are quite d ifference. The solid ifac- tion process of liqu id phase in sem i-solid slurry and the m icrostructure characteristics of secondary solidfication are described, and the reason for form ing th is characteristics are d iscussed. K ey words: magnesium alloys; sem i-solid; secondary solidfication; m icrostructure characteristic , 0