不锈钢表面激光熔覆层耐腐蚀研究

Study on Corrosion Resistance of Laser Cladding Layer on Stainless Steel Surface

研究了在耐酸不锈钢基体上采用激光熔覆和等离子喷焊两种工艺形成的涂层对耐腐蚀性的影响。使用５ｋＷ横流ＣＯ２激光器对预置于基体上的Ｃｏ基自熔合金粉末进行单道或多道扫描。得到的熔层与等离子焊层对比，激光熔层缺陷率低，成品率高。其组织细密均匀，晶粒细小，成分稀释率更小，对基体热影响小，熔层硬度与强韧性更高。性能试验证明，激光熔层具有更高的耐腐蚀性能。

The effect of coating on anti corrosion has been studied,which is formed by laser cladding and plasma spurt welding on metal base of anti acid stainless steel.A 5kW laser with CO 2 flow transverse was used for cladding Co base alloy or Ni base alloy powder replaced on the base metal.Comparing with the plasma spurt welding layers,the laser cladding layers had lower defect rate and higher product rate.The results of test showed that the laser cladding layers have higher corrosion resistance properties.