氩弧熔覆原位自生TiC/TiN增强镍基复合涂层分析

Analysis of In-situ TiC/TiN Reinforced Ni-based Composite Coating by Argon Arc Cladding

以Ti粉、C粉、TiN粉和Ni60A粉末为原料,利用氩弧熔覆技术在16Mn钢基材表面成功制备出Ni基增强相复合涂层,应用OM、SEM、XRD对复合涂层的显微组织和物相进行了分析。结果表明,复合涂层物相由TiC、TiN颗粒,γ-Ni奥氏体枝晶和枝晶间的Cr23C6共晶组织组成。涂层的硬度(HV0.2)达到900,较基体16Mn钢提高了3倍多;相对耐磨性较基体16Mn钢提高了8倍。

Ni-based reinforced composite coating was prepared successfully on the surface of 16Mn steel with the pre-alloyed powder of Ti, C, TiN and Ni60A by means of argon arc cladding technique. The microstructure and phase constituent were investigated using OM （optical microscope）,SEM （scanning electron microscopy） and XRD （X-ray diffraction）. The results show that the composite coating is com- posed of TiC,TiN,γ-Ni and M23C6 particles . The microhardness can reach 900 HV0.2, which is 3 times higher than that of 16Mn steel. The relative wear resistance of coating is about 8 times higher than that of 16Mn steel substrate.