AZ31镁合金轧制板材冲压性能的研究

Research on the drawability of AZ31 magnesium alloy rolling sheet

通过在不同温度下分别沿轧向、45°方向及横向进行了单向拉伸试验,且对AZ31镁合金轧制板材的冲压性能进行了研究.结果表明:随着变形温度的升高,板材抗拉强度和屈服强度下降,断裂伸长率提高,应变硬化指数和塑性应变比降低,拉深性能得到改善;变形温度高于200C时,板材的冲压性能得到改善,轧制方向上其屈强比为0.876,应变硬化指数为0.158,塑性应变比为1.307.

Drawabilities of AZ31 magnesium alloy rolling sheet were studied by using the simple tension test at different temperature along the orientation of rolls,45° and traverse. The results showed that both the tensile strength and yield strength decreased and the break elongation ratio increased as the deforma- tion temperature rose, and also the strain-hardening exponent and the plastic strain ratio reduced and the drawing performance was improved as well. When the temperature is higher than 200℃,the tensile ratio, the strain hardening exponent and the plastic strain ratio are up to 0.876,0. 158 and 1. 307 respectively in the rolling direction.