一、前言用于冲压成型的08A1薄板性能的优劣应通过冲压性能来考核。因而如何提高汽车板的冲压成型性一直是人们十分重视的课题,并对影响冲压性能的冶金因素进行了大量研究。实践证明,由于冲玉成型时变形过程的复杂性。仅仅采用常规的力学性能参数如:σ、σb、σ、Ψ以及坏突值并不能完全表征冲玉成型性能好坏。因此人们普遍采用加工硬化指数“η”及塑性应变比“γ”这两 I. INTRODUCTION The pros and cons of 08A1 sheet for press forming should be evaluated by stamping properties. Therefore, how to improve the stamping formability of automotive sheet has always been a subject of great importance to people and a great deal of research has been done on the metallurgical factors that affect the stamping performance. Practice has proved that due to the complexity of the deformation process when forming jade jade. Merely using conventional mechanical performance parameters such as: σ, σb, σ, Ψ and bad sudden value and can not fully characterize the performance of punching jade good or bad. So people generally use the work hardening index “η” and plastic strain ratio “γ” these two