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通过铸造WC和Co包WC与Ni45粉末的复合添加,运用激光合金化技术在中碳钢表面制备以WC颗粒为增强相的Ni基复合层,对复合层的微观组织、硬度及耐磨性进行了测试与分析。结果表明:激光合金化技术可在中碳钢表面制备均匀的WC颗粒增强合金化层,合金层的硬度及耐磨性得到显著提高。从表面磨损形貌可知,合金层在室温干摩擦过程中,均发生不同程度的磨料磨损和粘着磨损,强化机理主要为第二相强化,WC+Ni45制备的合金层耐磨性最佳。
Through the compounding of WC and Co-coated WC and Ni45 powder, the microstructure, hardness and wear resistance of composite layer were prepared by laser alloying on the surface of medium carbon steel with Ni-based composite layer with WC particles as reinforcing phase The test and analysis. The results show that the laser alloying technology can prepare uniform WC particles reinforced alloying layer on the surface of medium carbon steel, and the hardness and wear resistance of the alloy layer are significantly improved. It can be seen from the surface wear morphology that the wear and adhesive wear of the alloy layer all occurred in different degrees of dry friction at room temperature. The strengthening mechanism is mainly the second phase strengthening, and the wear resistance of the alloy layer prepared by WC + Ni45 is the best.