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利用 5kWCO2 激光器在 5Cr2 1Mn9Ni4N不锈钢基体表面成功熔覆了含不同CeO2 量的镍基金属陶瓷复合层。研究了稀土氧化物CeO2 对激光熔覆金属陶瓷复合层显微组织形态和耐腐蚀性能的影响 ,发现稀土氧化物CeO2 能加速碳化钨颗粒的溶解 ,促使钨与铬形成金属间化合物 ;激光熔覆镍基金属陶瓷复合层的耐硫酸腐蚀能力显著优于 1Cr18Ni9Ti不锈钢 ;且含 0 5 %CeO2 (质量分数 )的激光熔覆层的耐腐蚀能力比含 1 5 %CeO2 (质量分数 )和不含CeO2 的激光熔覆层都要强
A 5kWCO2 laser cladding on 5Cr2 1Mn9Ni4N stainless steel substrate surface with different CeO2 content of nickel-based cermet composite layer. The effects of rare earth oxide CeO2 on the microstructure and corrosion resistance of laser cladding cermets were studied. It was found that the rare earth oxide CeO2 accelerated the dissolution of tungsten carbide particles and promoted the formation of intermetallic compounds between tungsten and chromium. Laser cladding The corrosion resistance of nickel-based cermet composite composite layer is better than that of 1Cr18Ni9Ti stainless steel. The corrosion resistance of laser cladding layer containing 0 5% CeO2 is lower than that of 1% CeO2 (mass fraction) The laser cladding are stronger