激光熔覆耐磨自润滑覆层在发射装置上的应用研究

Research on Applicaton of Laser Cladding Wear-resistant Self-lubrication Cladding Layer in Launcher

利用激光熔覆技术在发射装置挡件(15-5PH马氏体钢)表面制备了金属基自润滑耐磨覆层,分析了复合粉末及其激光熔覆耐磨覆层的物相组成。用扫描电镜观察了耐磨覆层横截面的显微组织;分析了试样的摩擦学性能。结果表明,挡件采用激光熔覆耐磨自润滑覆层,其强度和耐磨性满足要求,可解决挡件在导弹发射过程中的长效服役寿命问题。

The metal matrix self-lubrication wear-resistant coating was fabricated on launcher stopper （15-5PH martensite stainless steel） by laser cladding. The phase compositions of compound powder and laser cladding wear resistance layer were analyed. The microstructure in the cross section of the cladding layer was observed by SEM. The friction behavior of the sample was analyzed. The results show that the strength and wear-resistant behavior of the stopper adopting laser cladding wear-resistant self-lubrication cladding layer can meet the requirement, which can solve the problem of long-term service life of stopper in the process of missile launch.