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为了提高60CrMnMo钢表面的耐磨性,采用CO2激光器在60CrMnMo钢表面进行激光合金化WC-B4C-TiC以获得高硬度、耐磨的合金化层。利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、硬度计分别分析了合金化层显微组织、物相组成与显微硬度,利用轮式磨损试验机测试了其常温下的耐磨性能,并与基材进行比较。结果表明:合金化层与基材呈冶金结合,合金化层组织主要由胞枝晶组成,合金层物相主要有Fe-Cr、B10C、Cr23C6、Ti8C5、W2B。合金化层的最高硬度可达1 300 HV0.3,是基材的5倍左右,耐磨性提高了大约3倍。
In order to improve the wear resistance of 60CrMnMo steel surface, CO2 laser was used to laser alloying WC-B4C-TiC on the surface of 60CrMnMo steel to obtain high hardness and wear resistant alloying layer. The microstructure, phase composition and microhardness of the alloying layer were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and durometer respectively. The wear resistance Performance, and compared with the substrate. The results show that the alloying layer is metallurgically bonded to the substrate, and the microstructure of the alloying layer is mainly composed of dendrites. The main phases of the alloy layer are Fe-Cr, B10C, Cr23C6, Ti8C5 and W2B. The highest hardness of the alloying layer of up to 1 300 HV0.3, is about 5 times the substrate, wear resistance increased by about 3 times.