【摘要】 采用自制落锤式冲击试验机系统研究了在“相对冲击功”作用下诸因素对高锰钢加工硬化能力的影响。结果表明,对于给定成分的高锰钢,只有在高于临界“相对冲击功”的情况下,才能达到最佳的硬化效果;锰含量的降低和碳含量的升高有利于加工硬化能力的提高;稀土变质处理可以提高加工硬化速率,但不能改善最终的硬化效果;合适的沉淀强化处理可以在一定范围内提高高锰钢的加工硬化能力。与传统的小能量冲击或静载荷压缩或拉伸形变相比,以“相对冲击功”进行试验研究更能真实地反映实际工况的加工硬化规律。更多还原

【Abstract】 In this paper,the effects of many factors on the ability of work hardening of high manganese steel were studied under ’relative impact load’ with the newly-designed dropping impact hammer.The results show that the best work hardening effect could be received only at higher ’relative impact load’ than critical value;Reduction of Mn content and increase of C content are favorable to increasing the ability of work hardening;RE-modification can improve the velocity of work hardening,but it can’t improve the final work hardening effect;Proper precipitate reinforcement treatment can improve the ability of work hardening to some degree.Compared with traditional small energy impact or static load compress or tension deformation,the laws of work hardening are revealed more clearly when the examination is done under ’relative impact load’.更多还原