1.前言通常变形速度愈快则材料变形阻抗愈大。用于塑性加工的延性材料,尤其在它的再结晶温度范围以上时,速度效应则愈明显。近来此种速度效应对塑性加工限度和望性不稳定的影响受到了人们的普遍关注。因此今后材料速度效应的测定将会更多。但在测定材料速度效应时,如果试验速度不能大幅度地变化或不能进行高速试验的话,则是得不到满意的结果的。目前的方式有凸轮塑性计和高速 1. Foreword Generally, the faster the deformation speed, the greater the material deformation resistance. Ductile materials used for plastic processing, especially above its recrystallization temperature range, are more pronounced in velocity effects. Recently, the effect of such speed effect on the plastic processing limit and the instability of expectation has drawn people’s universal attention. Therefore, the determination of material velocity effect will be more in the future. However, satisfactory results can not be obtained in the measurement of the material velocity effect if the test speed can not be varied significantly or the high-speed test can not be performed. The current method has cam plasticity and high speed