使用自行配制的Ni基合金粉末和混合加入适量其他功能性粉末，采用基体预热和激光同轴送粉熔覆技术，进行在板坯结晶器母体表面熔覆强化的试验研究。结果表明，通过基体预热和激光同轴送粉熔覆强化，可以有效减小预铺再熔覆产生的较多的孔缝现象；可以通过粉末配制控制熔覆层的成分构成，且熔覆层组织致密、均匀，呈典型的快速凝固现象；熔覆层与基体元素相互渗透和稀释，得到了具有良好冶金结合与高致密度的结合过渡区，而且基体稀释率很小；通过此种强化处理可明显提高结晶器的耐磨性和耐蚀性。

Adopted the compounding Ni-base alloy powder and properly mixed a few functional powders, the study on surface strengthening for crystallizer base material by substrate pre-heated and laser coaxial feeding cladding was investigated. The results indicate that the laser coaxial feeding cladding can effectively decrease cladding layer’s pores and crackers compared with laser pre-laid cladding, the cladding layer structure is compact, uniform with typical rapid freezing character and the structure can be controlled by compounding alloy powders. The elements of substrate and cladding layer osmosize and dilute to each other, the bonding interface is good with metallurgic and tight combination and the rate of dilution is very low. The wear resistance and erosion resistance of substrate are improved evidently by this treatment.