Study on Residual Stress of Submerge Arc Strip Cladding Layer of Nuclear Island Main Equipment

The submerge arc strip cladding process used on nuclear island main equipment was introduced. The cladding layer residual stress distribution was simulated by means of the finite element analysis, using small diameter blind hole method for measuring actual welding residual strain and calculating of the residual stress value. Through the combination of theoretical simulation and experimental measurement, the residual stress value and direction in different regions of cladding layer were obtained. Providing of a theoretical basis for the prevention of welding defect of main equipment cladding layer, which is contribute to optimize the cladding process and prevent of crack defects of nuclear island main equipment.