TIG WELDING METHOD OF FERRITE STAINLESS STEEL SHEET

摘要

A TIG welding method for a ferrite stainless steel sheet is disclosed, wherein a first shield gas is used wherein the gas is a mixture of argon gas and helium gas, 20 to 90% by volume of helium is included in the mixture, and the flow rate S₁ of the first shield gas is set in a range of 0.175 m/sec≦S₁≦1.75 m/sec, and a second shield gas is used wherein the gas is argon gas, and the flow rate S₂ of the second shield gas is set in a range of 0.05 m/sec≦S₂≦1.51 m/sec.