Numerical Simulation and Multi-Objective Parameter Optimization of Inconel718 Coating Laser Cladding

Aiming at the difficulty of temperature control in laser cladding process high-temperature nickel-based alloys, influence parameters on molten pool, and quality layer were explored. Firstly, through analysis finite element method, Inconel718 single-pass model was established surface 45 steel by using parametric language life–death technology, different power scanning speed pool center explored, reasonable scope selected. Secondly, taking as independent variables, dilution rate forming coefficient response BBD (Box–Behnken Design) to design experiments method used establish regression prediction indicators, genetic algorithm carry out multi-objective optimization obtain best results. The optimal parameter combination is a 1756 W, 19.43 mm/s, powder feeding 19.878 g/min. Finally, multi-pass lap joint experiment carried with parameters, it found that has dense fine structure good metallurgical bond matrix, which can effectively guide actual production.