To study the influence laws of welding parameters on weld porosity, underwater wet flux-cored arc welding ( FCAW) duplex stainless steel S32101 was carried out in a hyperbaric chamber, and the second-order multiple ...To study the influence laws of welding parameters on weld porosity, underwater wet flux-cored arc welding ( FCAW) duplex stainless steel S32101 was carried out in a hyperbaric chamber, and the second-order multiple regression equation was established. The interactive effects of welding parameters on the porosity were analyzed by the three dimensional response surfaces and the contour plots. The results present that the interaction effect between water depth and voltage on the porosity is the most significant. Theoretically, a non-pores weld bead can be gained by reasonably matching these parameters with water depth less than 10 m. Always, the weld porosity reaches its peak value with a 7 mm/s welding speed.展开更多
基金the National Natural Science Foundation of China(Grant No.51374111&51175185)Science and Technology Plan Project of Guangdong Province(Grant No.2015B050502005)for financial support
文摘To study the influence laws of welding parameters on weld porosity, underwater wet flux-cored arc welding ( FCAW) duplex stainless steel S32101 was carried out in a hyperbaric chamber, and the second-order multiple regression equation was established. The interactive effects of welding parameters on the porosity were analyzed by the three dimensional response surfaces and the contour plots. The results present that the interaction effect between water depth and voltage on the porosity is the most significant. Theoretically, a non-pores weld bead can be gained by reasonably matching these parameters with water depth less than 10 m. Always, the weld porosity reaches its peak value with a 7 mm/s welding speed.