In order to find a method to reveal the deforming rnles of the viscoplastic extrusion forming such as the isothermal extrusion and superplastic extrusion etc.

• 为了寻求一种能全面揭示象等温和超塑性这类粘塑性复合挤压成形变形规律的方法，采用刚一粘塑性有限元对常温具有粘塑性行为的工业纯铅复合挤压进行了数值模拟。