科研之友
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摘要
Various non-smooth surfaces on the 3Cr2W8V, H13 and HD die steel that were similar to the animals' surfaces were processed by laser. The size, microstructure and hardness of the striate non-smooth units processed with various laser parameters were studied. The abrasive particle wear behaviors of three materials with various distributing distance striate non-smooth units were measured at 200 A current intensity and 3.0 ms impulse duration. And the wear behaviors of three materials with various shape 2 rum distributing distance non-smooth units were also measured at the same laser parameters. At the same time the wear mechanism of the die steels with non-smooth surfaces were discussed. The results show that the wear-resistances of several materials with non-smooth surfaces are better than that of the smooth materials. The changing trend of wear-resistance of three materials with non-smooth surfaces remains the same at same laser parameters regardless of their shape or the distributing distance. Namely, the wear-resistance of HD non-smooth specimens is the best, and that of the 3Cr2W8V is secondary, and that of the H13 is the worst. The size and hardness of non-smooth units are the major factors influencing the wear-resistance of non-smooth material. The bigger volume and higher hardness of non-smooth units result in the better wear-resistance of material with non-smooth surface.
