| 摘要 |
PURPOSE:To prevent defects due to a blowhole, etc., and surface oxidation by subjecting high Mn nonmagnetic steels for very low temperature to MIG welding under conditions to satisfy the inequality by using a specified welding wire and shielding gas. CONSTITUTION:The high Mn nonmagnetic steels for very low temperature are subjected to MIG welding under the conditions to satisfy the inequality as the heat gain by using the common metal-based welding wire and mixed gas consisting of <=2.20% O2, >=20% He and the balance Ar as the shielding gas wherein J and T denote the heat gain (KJ/cm) and the thickness (mm) of the high Mn nonmagnetic steels for very lower temperature, respectively. |
