研究Q235钢表面激光熔覆钛涂层的显微组织、物相组成及耐蚀性能。采用激光熔覆技术在钢材表面先制备镍金属层作为过渡层, 再通过激光熔覆技术制备出钛的表面层。采用SEM观察了熔覆层的表面形貌, 采用Zahner Zennium 型电化学工作站对熔覆层的耐蚀性能进行了研究。结果表明, 过渡层的引入可以显著改善钢材和钛连接处材料界面的状况, 能有效减少脆性金属间化合物的生成; 可以显著改善涂层的表面成型质量; 制备出的涂层的耐蚀性比基体材料要好。过渡层的厚度以及表层熔覆工艺中对过渡层的稀释率的控制, 是熔覆层成型质量的关键。

To study the microstructure, phase composition and corrosion resistance of titanium coating on Q235 steel surface by laser cladding. The laser cladding technique was used to prepare nickel metal layer as the transition layer on the surface of steel, and then the surface layer of titanium was prepared. The surface morphology of the cladding layer was observed by SEM. The corrosion resistance of the cladding layer was studied by Zahner Zennium type electrochemical workstation. The introduction of the transition layer can significantly improve the interface condition of the steel and titanium materials, effectively reduce the formation of brittle intermetallic compounds, significantly improve the surface forming quality of the coating, and the corrosion resistance of prepared coating is better than the matrix material. Conclusion: The thickness of the transition layer and the control of the dilution rate of the transition layer in the surface cladding process are the key to the quality of the cladding layer.