低碳钢钨极氩弧熔覆TiC/BN合金镀层的组织和性能研究

Study on Microstructure and Properties of TiC/BN Alloy Coating by Low Carbon Steel Argon Tungsten-arc Welding

利用钨极氩弧熔覆在低碳钢基体上制备了TiC/BN合金镀层,并对该合金镀层的显微组织和力学性能进行了分析。结果表明:利用钨极氩弧熔覆技术,选择合适的工艺参数可以在低碳钢基体上形成细小、分布均匀的Fe基TiC、BN颗粒。当碳化钛中添加0.75%氮化硼粉末时,磨痕面积最小,从而提高了耐摩擦性能。当碳化钛中添加过多氮化硼时,由于钛合金熔覆层硬度的下降,会导致磨痕面积增大,降低其耐磨性。

TiC/BN alloying coatings were prepared on low carbon steel matrix by argon tungsten-arc welding, and the microstructure and mechanical properties of TiC/BN composite coating were analyzed. The results show that by using argon tungsten-arc welding, the fine and uniform distributed Fe based TiC and BN particles can be formed on low carbon steel substrate by using appropriate process parameters. When 0.75% boron nitride powder is added in titanium carbide, the wear scar area is the least, and then, the wear resistance of the low carbon steel surface improves. When too much boron nitride powder is added in TiC, due to the decrease of the hardness of the titanium alloy cladding layer, it will lead to the increase of wear scar area and reduce its wear resistance.