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通过对深冷及钝化处理工艺下W6Mo5Cr4V2高速钢磨损情况的研究,以及对其微观组织进行SEM观察和磨痕分析,分析了磨损机理以及耐磨性提高的原因。结果表明:未深冷试样以粘着磨损为主,深冷以及钝化处理后的试样以氧化磨损为主;深冷处理可以显著提高材料的硬度和耐磨性,相比于深冷处理前耐磨性可以提高1.5倍,这是由于深冷处理后析出碳化物的平均尺寸减小为深冷处理前的一半左右,碳化物数目约增长了46%,而且分布更加均匀;钝化处理工艺不改变材料的硬度,但是可以改善材料初期的磨损情况,减小振动,提高耐磨性,这是由于钝化处理工艺促进材料表层出现含碳的薄膜,有一定润滑作用,从而改善了材料的耐磨性。
Through the study of the wear of W6Mo5Cr4V2 HSS under cryogenic and passivation processes, the microstructure of the W6Mo5Cr4V2 steel was analyzed by SEM and wear scar analysis. The reasons for the wear mechanism and wear resistance were analyzed. The results show that the main wear and tear of non-subcooling samples are mainly adherent wear, and the samples after deep-cooling and passivation treatment are mainly oxidative wear. Cryogenic treatment can significantly improve the hardness and wear resistance of the samples, Grinding can be increased by 1.5 times, because the average size of precipitated carbide after cryogenic treatment reduced to about half before cryogenic treatment, the number of carbides increased by about 46%, and more evenly distributed; passivation process does not change the material Hardness, but can improve the initial wear and tear of the material to reduce the vibration and improve the wear resistance, which is due to the passivation process to promote the material surface carbon-containing film has a certain degree of lubrication, thereby improving the wear resistance of the material .