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对1Cr18Ni9Ti不锈钢进行了激光表面熔覆,所用涂层材料为添加不同含量的α-Al2O3纳米粉构成的Fe基合金。组织观察和涂层硬度及干滑动摩擦磨损试验表明,三种纳米粉含量(1%,2%和3%质量分数)涂层都不同程度地改善了Fe基合金熔覆层的硬度及耐磨性能,其中2%纳米颗粒含量涂层有较高的涂层硬度和较小的质量损失。硬度平均提高了约100 HV,质量损失平均下降约30%。耐磨性的改善被认为是与细小的α-Al2O3纳米粒子产生的细晶强化和第二相强化作用有关。
The laser cladding of 1Cr18Ni9Ti stainless steel was carried out. The coating material used was Fe-based alloy with different content of α-Al2O3 nano-powder. Tissue observation and coating hardness and dry sliding friction and wear tests showed that the coating content of the three nano-powders (1%, 2% and 3% mass fraction) all improved the hardness and wear resistance of the Fe-based alloy coating to varying degrees Performance, where 2% nanoparticle coatings have higher coating hardness and less mass loss. Hardness increases by an average of about 100 HV with an average loss of mass loss of about 30%. Improvement in wear resistance is believed to be related to fine grain strengthening and second phase strengthening produced by fine alpha-Al2O3 nanoparticles.