【摘要】 采用同轴送粉激光熔覆工艺在Q235钢表面制备了最大熔覆厚度为1 mm的Fe-Cr-Mo-C-B-Si非晶涂层。研究了激光熔覆工艺参数对熔覆层非晶形成能力、微观组织、显微硬度、耐磨性及耐腐蚀性能的影响。结果表明，熔覆层中的非晶相含量与激光能量密度密切相关，与熔覆层性能呈正相关。随着激光能量密度增加，熔覆层的非晶相含量、显微硬度、耐磨性和耐蚀性均呈先增加后减小的趋势。能量密度为125.00 J/mm~2时制备的熔覆层具有最好的耐磨及耐蚀性能，这主要是细晶强化和非晶强化的作用。更多还原

【Abstract】 Fe-Cr-Mo-C-B-Si amorphous coating with a maximum thickness of 1 mm was prepared on Q235 steel by coaxial powder feeding laser cladding. The influence of laser cladding parameters on amorphous forming ability, microstructure, microhardness, wear and corrosion resistance of cladding layers was investigated. The results reveal that the amorphous phase content in the cladding layer is closely related to the laser energy density, and positively correlated with the performance of the cladding layer. With the increase of laser energy density, the amorphous phase content, microhardness, wear and corrosion resistance of the cladding layer all present a trend of increase firstly and then decrease. The cladding layer prepared at 125.00 J/mm~2 exhibits desirable wear and corrosion resistance, which is mainly attributed to fine grain strengthening and amorphous strengthening.更多还原