模具线切割表面变质层及显微裂纹的分析与研究  

Analysis and Research for Surface Modification-lay and Micro-crack of Die and Mould on Wire Cut

作　　者：浦文禹[1] 

机构地区：[1]常熟理工学院,江苏常熟215500

出　　处：《煤矿机械》2009年第8期103-105,共3页Coal Mine Machinery

摘　　要：概述了线切割加工模具表面变质层的形成机理与显微组织,介绍了其表面残余应力、抗疲劳强度、显微硬度和耐磨性等力学性能,分析了变质层表面显微裂纹的产生原因与影响因素,并提出相应的处理方法,增强模具表面的抗疲劳强度,以及预防与改善显微裂纹的技术措施,提高模具的加工质量与使用寿命。The formed mechanism and micro-structure of the surface modification-lay on wire cut EDM for die ＆ mould were summarised.The mechanical property of surface residual stress, resistance to fatiage property, micro-hardness, wear-resistance are introduced. Formation result and effect factor of micro-crack on modification - lay surface were analysed. Treatment means to increase resistance of fatiage property for die ＆ mould surface were presented. The technical measure of preventive and improved for micro-crack , machine quality and service life of die ＆ mould were improved.

关 键 词：变质层 显微裂纹 线切割 模具 预防与改善措施 

分 类 号：TG76[金属学及工艺—刀具与模具]