炉底辊环防积瘤激光熔覆涂层的制备及应用

Manufacturing and application of laser cladding coating for anti-accumulation of nodulation on roll ring of furnace bottom-roller

针对炉底辊表面结瘤的现象,利用激光熔覆方法在Ni基炉底辊环表面制备NiCr-Cr3C2涂层,通过试验分析了熔覆涂层的显微组织及硬度,研究其可行性,并通过实际上机使用,分别下机检验中温和高温段的使用状况。结果表明,该熔覆涂层具有高硬度、良好的高温抗氧化性和耐磨性,实际使用效果良好,用该方法制备的辊环较好的解决了炉底辊积瘤现象,延长了其使用寿命。

In view of the phenomenon of nodulation accumulated on the surface of furnace bottom-roller,NiCr-Cr 3 C 2 coating was prepared by laser cladding on the surface of roll ring of Ni-based furnace bottom-roller and microstructures and hardness of coated samples were analyzed to study its feasibility through experiments.And samples’service condition at medium temperature and high temperature was respectively checked after the actual machine use.The results show that the cladding coating has high hardness,good high temperature oxidation resistance and wear resistance,which has good application effect.The roll ring prepared by this method can solve the phenomenon of nodulation accumulated on the surface of furnace bottom-roller and prolong its service life.