搅拌工艺对半固态Y112铝合金组织及性能的影响

采用自行研制的机械搅拌装置,研究了不同工艺参数对半固态Y112铝合金组织及性能的影响.研究表明,搅拌温度越高,搅拌速度越大,固相颗粒越细小、均匀和圆整,其抗拉强度与伸长率越高;但温度太高,固相颗粒会熔化,抗拉强度及伸长率也降低;随搅拌时间的延长,固相颗粒先变得细小、均匀和圆整,然后长大,抗拉强度、伸长率先升高后降低.

Effects of Stirring Technology on Microstructure and Mechanical Properties of Semi-solid Y112 Aluminum Alloy

Effect of different technologic parameters on the microstructure and mechanical properties of semi-solid Yl12 aluminium alloy were investigated by a self-developed mechanical stirring device. The results show that the higher stirring temperature and stirring speed, the finer and more homogeneous the spherical grains, the higher the tensile strength and elongation are. If the temperature is too high, the solid grains will be melted, the tensile strength and elongation will be reduced. With increasing stirring time, the grains firstly become fine, uniform and round, then grow up. The tensile strength and elongation firstly increase, then reduce.