期刊论文

中文

应用激光

1000-372X

2015

35

2

166-169

10.14128/j.cnki.al.20153502.166

2012湖南省科技计划项目资助（项目编号:2012FJ3101）；

本校为第一机构

为提高锆合金表面的耐摩擦、耐腐蚀性能,研究在锆合金表面激光熔覆TIN粉末,制备TiN/ZrN陶瓷涂层。采用扫描电镜(SEM)、X射线衍射仪(XRD)、能量散射X射线谱仪(EDX),分别分析了熔覆层的显微组织形貌、成分与相结构,测试了激光熔覆层的显微硬度。结果表明,在适当的工艺参数下,可制备出没有裂纹、气孔和表面质量良好的熔覆层。熔覆层的表层有大量密集生长的树枝晶组织,中层开始出现颗粒状和块状的组织,结合区有少量的纤维状组织,且熔覆层主要由Zr、ZrN、TiN等相组成。激光熔覆层硬度值从表及里呈递减变化,熔凝层的硬度最高达到863 HV0.1,是锆合金基体(约为180 HV0.1)的4.8倍。

The TiN/ZrN composite ceramic coating was manufactured by laser cladding TiN powder on Zr alloy surface to improve the surface property of friction resistance and corrosion resistance. Micro-structure morphology, composition and phase distributions of the composite coating are investigated by scan electron microscopy(SEM), energy-dispersive X-ray spectroscopy(EDX), X-ray diffraction (XRD), respectively. The micro-hardness of the ceramic layer is also measured. The results show that the TiN/ZrN ceramic coating with good surface quality can be formed by using appropriate experimental parameters....