强流脉冲电子束对3Cr2W8V微摩擦磨损性能的影响

Effect of HCPEB on Frictional Wear Resistance of 3Cr2W8V Mold Steel

分别制备了常规热处理、强流脉冲电子束直接处理和强流脉冲电子束合金化Al处理的3Cr2W8V模具钢试样,使用金相显微镜、表面粗糙度测试仪,硬度测试仪对处理层的显微结构、表面粗糙度及截面硬度进行分析,采用HSR-2M微摩擦磨损试验机对处理层摩擦磨损性能进行测试。结果表明:试样原始表面粗糙度的大小对处理后粗糙度的影响较大;电子束处理后截面硬度均有所提高,其中3Cr2W8V电子束合金化Al的峰值硬度相对于原始样品升高了10%,而3Cr2W8V电子束直接照射样品的峰值硬度相对于原始样品升高了24%～33%;经电子束照射后的试样在微摩擦实验中摩擦系数均出现突然增大现象,增大后的摩擦系数与原始样品相当。3Cr2W8V电子束合金化Al样品、3Cr2W8V电子束直接照射样品的磨损量相对于原始样品分别下降22.7%、72.7%。

The sample of 3Cr2W8V mold steel on heat treatment,HCPEB treatment and HCPEB surface alloying Al were made and the frictional wear resistance was investigated by micro hardness tester,roughness tester and friction testing method.The results indicate that the initial surface roughness has important influence on after HCPEB treatment surface roughness;Moreover,it is found that this seems to be all sample after electron beam treatment exhibited higher section hardness compared to original sample,electron beam surface alloying Al sample section hardness is increased by 10%,directly electron beam treatment sample section hardness is increased by 24%～33%;Furthermore,the friction coefficient appeared suddenly enlarge phenomenon,the value of enlarge friction coefficient is the same as the original sample＇s.The weight loss of HCPEB treatment and HCPEB surface alloying Al of 3Cr2W8V decreased 22.7%、 72.7% compared to original sample.