作　　者： ; ;

机构地区： 东南大学材料科学与工程学院

出　　处： 《东南大学学报（自然科学版）》 1993年第5期63-70,共8页

摘　　要： 研究了温度和应变速率对常规铸造和部分凝固铸造Zn-20％Al合金的半固态压缩形变的影响规律。试验温度和应变速率范围分别为380～430℃和2.1×10^(-1)～8.1×10^(-4)s^(-1)。试验结果表明,金属在半固态时的形变抗力比固态时大幅度降低;部分凝固铸造合金的形变能力优于常规铸造合金;在高温(430℃)、低应变速率(8.1×10^(-4)s^(-1))条件下,常规铸造合金也能获得较好的极限塑性和低的变形抗力。上述结果为研究金属半固态形变提供了依据。 This article deals with the effect of temperature and strain rate on compression properties of semisolid Zn-20%Al alloys. Small specimens of both conventional cast alloy and partially solodified alloy were compressed at the strain rates ranging from 2.1×10(?)to 8.4×10^(-4)s^(-1) and the temper ature from 380℃ to 430℃, The results show that the resistance to deformation in semisolid state are remarkably lower than that in solid state. Whereas the formability of the partially. solidified alloy is better than that of the conventional cast alloy. The latter may also present a reasonable formability at high temperature (430℃)and low strain rate (8.4×10^(14)s^(-1)), These results provide some basic aspects for the study of metal forming operation under semisolid state.

关 键 词： 压缩 锌合金 形变 铸造合金

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]