【摘要】 本文对球墨铸铁压射冲头激光表面处理硬化层的残余应力进行了测试和分析。研究证明:压射冲头表面硬化层的裂纹是由于残余应力所产生的裂纹源扩展所形成的。更多还原

【Abstract】 the residual stress srate of die-casting punch of sphero- -idal graphite cast iron by laser surface treatment is measured and analyzed in this paper. The research results show that the crack of the harden layer of die-casting punch surface is formed by the expansion of crackle source which results from the residual stress.更多还原