45钢激光熔覆Ni60合金粉末工艺参数的多目标优化

为延长零件使用寿命,降低生产成本,在45钢表面激光熔覆Ni60熔覆层可以达到生产要求,避免资源浪费,实现绿色制造.通过层次分析法确定权重,建立三水平三因素的正交试验,分析熔覆层的宏观和微观形貌、摩擦磨损特性、显微硬度.结果表明:优化后的工艺参数为激光功率3 kW,扫描速度12 mm/s,搭接率45％.合适的工艺参数可以...

Multi-objective optimization of process parameters of 45 steel laser cladding Ni60 alloy powder

In order to extend the service life of the parts and reduce the production costs, the laser cladding of the Ni60 molten coating layer on the 45 steel surface can meet the production requirements, avoid the waste of resources and achieve green manufacturing. The weights were determined by analytic hierarchy process and a three-level, three-factor orthogonal test was established to analyze the macro and micro morphologies, friction wear characteristics and micro hardness of the molten coating layer. The results show that the optimized process parameters are laser power of 3 kW, a scanning speed of 12 mm/s and overlap rate of 45%. The suitable process parameters can refine the tissue grain and avoid the generation of cracks and pores. The coating obtained by optimizing the process parameters has better wear resistance, lower friction coefficient, less wear weight loss than the base, the wear mechanism is abrasive wear and the hardness is three times that of the base.