Weldability of 12%Cr-15%Mn Austenitic Stainless Steel

概要

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A study has been made on the effect of alloying elements of tungsten, carbon and nitrogen on the high temperature strength, toughness and weldability of a base composition of Fe-12% Cr-15% Mn alloy welds. The tungsten-alloyed welds showed an increase in high temperature strength without affecting ductility. Various combinations of these alloying elements improved the tensile strength of Fe-12% Cr-15% Mn alloy relative to type SUS316 stainless steel welds. The creep rupture time prolonged with increasing carbon content, and the cominbed addition of carbon and tungsten increased the creep rupture time further. The absorbed energy of the weld metals is lower than that of base metal but they indicated as high as 180J. The aging effect degrades toughness due to the predipitation of M_<23> C_6 on the grainboundary. The weldability evaluated by hot cracking susceptibility was not affected by alloying with tungstn and carbon in this alloy system. Reducing the sulphur content remarkably decreased hot cracking susceptibility. It is noted that the alloys studied showed a higher hol cracking resistence than commercial SUS316L stainless steel.
社団法人溶接学会の論文
1992-10-01