Optimization of Plasma Cladding Process Parameters for 35CrMo Steel Based on Orthogonal Experiment

In order to improve the corrosion resistance of 35CrMo steel,so as to extend its service life and improve its economic benefits,the orthogonal experiment of three factors and three levels was adopted to design AlCoCrFeNi high entropy alloy plasma cladding layer on the surface of 35CrMo steel under different cladding parameters. The corrosion resistance of AlCoCrFeNi high entropy alloy cladding layers with good metallurgical bonding effect was tested. The results show that the metallurgical bonding effect between the cladding layer and the substrate of the three groups of samples is good,and no defects such as cracks and pores are found. The influencing factors of different process parameters on the preparation of the plasma cladding layer of AlCoCrFeNi high entropy alloy are powder feeding voltage,cladding current and spray gun moving speed.The corrosion resistance of the cladding layer of the three groups of samples is obviously better than that of the 35CrMo steel matrix,and the corrosion resistance of sample No.1 is the best.It can be concluded that the corrosion resistance of 35CrMo steel can be improved by using plasma cladding technology.The cladding current of the best corrosion resistance is 130 A,the moving speed of spray gun is 180 mm/min,and the powder feeding voltage is 15 V.