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利用升温离子注入的方法对M50钢进行氮、碳等离子体基离子注入,注入能量为45 ke V,利用GXRD分析了改性层的相结构,采用氧化锆球作为对磨副对处理前后的试样进行磨损性能测试,利用附带能谱的SEM对磨痕的形貌及成分进行分析,探讨其磨损机制。研究结果表明,改性层主要由马氏体及少量的Fe_3C、Cr N化合物所组成,随着温度的升高,化合物含量逐渐增加;改性层硬度明显提高,并在300℃出现硬度峰值,超出基体9.5 GPa;M50钢经过处理后磨损性能大幅度提高,磨损量降低幅度最多达到76.4%,磨损机制主要有氧化磨损、磨粒磨损和粘着磨损。
M50 steels were ion implanted with nitrogen and carbon by using the method of temperature rising ion implantation. The energy of injection was 45 keV. The phase structure of the modified layer was analyzed by GXRD. Zirconia balls were used as the test materials before and after grinding Wear test was carried out. The morphology and composition of wear marks were analyzed by SEM with attached energy spectrum, and the wear mechanism was discussed. The results show that the modified layer mainly consists of martensite and a small amount of Fe 3 Cr and Cr N compounds. With the increase of the temperature, the content of the compound increases gradually. The hardness of the modified layer increases obviously and the hardness peak appears at 300 ℃. Beyond the base of 9.5 GPa; M50 steel significantly improved the wear performance after treatment, the amount of wear reduction of up to 76.4%, the wear mechanism mainly oxidative wear, abrasive wear and adhesion wear.