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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 3Cr2W8V die steel samples were prepared by the conventional heat treatment, direct current pulsed electron beam treatment and high current pulsed electron beam alloying Al respectively. The microstructure of the 3Cr2W8V die steel was characterized by means of metallographic microscope, surface roughness tester and hardness tester. Structure, surface roughness and cross-section hardness were analyzed. The friction and wear properties of treated layer were tested by HSR-2M micro-friction and wear tester. The results show that the primary surface roughness of the sample has a great effect on the roughness after the treatment. The hardness of the cross section increases after the electron beam treatment. The peak hardness of 3Cr2W8V electron beam alloyed Al is increased by 10 %, While the peak hardness of the samples irradiated by 3Cr2W8V electron beam increased by 24% -33% compared with that of the original sample. The friction coefficient of the sample irradiated by electron beam suddenly increased when the micro-friction experiment was carried out. The friction coefficient is equivalent to the original sample. 3Cr2W8V electron beam alloyed Al samples, 3Cr2W8V electron beam direct abrasion samples relative to the original sample decreased by 22.7%, 72.7%.