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

Abstract

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

Carbon deposition mechanism of molten salt cleaning and optimization of multicomponent molten salt formula for remanufacturing

“…Under the environment of high temperature and high pressure, the colloidal layer is constantly compressed, and the pore structure is constantly reduced until it is compressed into the asphaltene layer, forming a carbon deposit with complex components and dense structure. [26][27][28] In previous studies, carbon deposition was mostly regarded as a process of accumulation on a solid surface. In fact, the entire adhesion process is composed of carbon deposition particles, metal particles, full combustion of lubricating oil, and fuel oil.…”

Effects of Process Parameters on Microstructure and Wear Resistance of Laser Cladding A-100 Ultra-High-Strength Steel Coatings

“…The results showed that the laser power and scanning speed have an influence on the eutectic precipitation, and the eutectic precipitation is positively correlated with the mass gain of the coating. Sirui Yang et al [19] performed multi-objective parameter optimization for laser cladding of IN718 cladding coatings. The validation experiments on single-pass and multi-pass cladding coatings were carried out with the optimal parameters, and it was proved that the process parameters were closely related to the quality of cladding coatings.…”

Research on the Process of Laser Cladding Ni60 Coating on High-Nickel Cast Iron Surfaces

“…Accurately simulating this process is of great significance for obtaining high-quality coatings. Among the various candidate methods, the finite element model is widely utilized as it can offer guidance for selecting laser parameters [15].…”