WELDING METHOD FOR HIGH PURITY FERRITIC STAINLESS STEELS

摘要

PURPOSE:To form a welded joint of high quality with high efficiency by welding high purity ferritic stainless steels with a very low carbon austenitic coated electrode or a flux-cored wire and grinding slightly the base metal side surface of a final layer. CONSTITUTION:At the time of welding the high purity ferritic stainless steels by using the very low carbon austenitic stainless steel coated electrode or flax- cored wire, 3-30mm width of the base metal side surface is ground to 0.1-0.7mm depth from a boundary part between weld metal of the final layer and base metal or molten by TIG welding without filler material. By this method, ductility and toughness of a weld zone are improved.