本文介绍了用一台2kW CO_2激光器在20~#钢表面涂敷WC—SiC—Co进行激光熔敷的实验。对涂敷层进行了物相、显微组织形貌、硬度及耐磨性能等多方面的测试和分析。结果表明,把高性能材料熔敷在碳钢表面上,使得低质钢材表面的化学成份、显微组织发生了根本性的变化,而表面的硬度及耐磨性能均得到了很大的提高。 This paper describes the experiment of laser cladding WC-SiC-Co on 20 ~ # steel with a 2kW CO2 laser. The coatings were tested and analyzed in many aspects such as phase, microstructure, hardness and wear resistance. The results show that the high-performance materials deposited on the surface of carbon steel, making the low-quality steel surface chemical composition, microstructure has undergone a fundamental change, and the surface hardness and wear resistance have been greatly improved.