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为了改善45钢表面的耐磨性能,采用CO2激光束在45钢表面进行铬钼硼合金化,以获得高耐磨性的合金复合涂层。利用SEM,XRD,EDS,HVS-1000显微维氏硬度计,MMS-2A型屏显式摩擦磨损试验机,对涂层组织结构与耐磨性进行了分析。结果表明,胞状晶是主要的合金层组织,并在胞状晶上弥散分布着通过原位合成而形成的高硬度合金碳化物,其中,合金层显微硬度最大值为860 HV,是基材的近3倍,其平均耐磨性也是基材的近3倍。
In order to improve the wear resistance of 45 steel surface, using CO2 laser beam on the surface of 45 steel chromium molybdenum boron alloy to obtain high wear resistance of the alloy composite coating. The microstructure and wear resistance of the coating were analyzed by SEM, XRD, EDS, HVS-1000 Micro Vickers hardness tester and MMS-2A screen display friction and wear tester. The results show that the cell-like crystal is the main alloy layer structure, and dispersed in the cell crystal by in-situ synthesis and the formation of high-hardness alloy carbide, wherein the maximum microhardness alloy layer is 860 HV, is the substrate Nearly 3 times its average wear resistance is nearly 3 times the substrate.