外圆表面送粉激光熔覆ZrO2和Ni60A复合涂层组织及硬度
Microstructure and Micro-hardness of the ZrO2/Ni60A Composite Coating
游润娟，欧阳八生
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作者单位：南华大学机械工程学院
中文关键字：激光熔覆; ZrO2/Ni60A; 扫描速度
英文关键字：laser cladding ; ZrO2/Ni60A; scanning speed
中文摘要：在304不锈钢外圆表面激光熔覆镍基氧化锆金属陶瓷粉末，对激光工艺参数优化，制备工艺性能良好的熔覆层。研究了激光工艺参数对熔覆层宏观形貌、显微组织和硬度分布的影响。结果表明：激光功率为1.5kw时为佳；随扫描速度增大，熔覆层的组织有细化的趋势；通过优化扫描速度，可得到显微硬度值较高，且沿熔覆层表面的垂直方向的硬度分布变化不大的熔覆涂层。
英文摘要： To manufacture the better processing property coating by laser cladding self-fused Ni-based ceramic powder of ZrO2 composite on the surface of 304 SUS, and cladding experiment with parameter variations were presented. The influence of the laser processing parameters on macroscopic view、microstructure and micro-hardness of the laser cladding layers were investigated. The results show that we can get better coating when laser power is 1.5KW, and the layers have the trend of refined framework with the growing of scanning speed; micro-hardness will be higher and distribution from substratum to surface with little fluctuate by optimizing scanning speed.