STUDY ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF 304 STAINLESS STEEL JOINTS BY TIG–MIG HYBRID WELDING
作者： EMMANUEL O. OGUNDIMU , ESTHER T. AKINLABI , MUTIU F. ERINOSHO
DOI: 10.1142/S0218625X18500427
关键词: Gas tungsten arc welding 、 Laser beam welding 、 Gas metal arc welding 、 Metallurgy 、 Filler metal 、 Arc welding 、 Materials science 、 Heat-affected zone 、 Electric resistance welding 、 Welding
摘要: Stainless steel is a family of Fe-based alloys having excellent resistance to corrosion and as such has been used imperatively for kitchen utensils, transportation, building constructions much more. This paper presents the work conducted on material characterizations tungsten inert gas (TIG)–metal (MIG) hybrid welded joint type 304 austenitic stainless steel. The welding processes were in three phases. phases employed are MIG using current 170A, TIG 190A, TIG–MIG with currents 190/170A, respectively. MIG, TIG, weldments characterized incomplete penetration, full penetration excess weld. Intergranular austenite was created toward transition heat affected zones. thickness delta ferrite (δ-Fe) formed microstructures weld more than emerged welds. A specimen at 190/170A highest ultimate tensile strength value percentage elongation 397.72MPa 35.7%. can be recommended high-tech industrial applications nuclear, aircraft, food processing, automobile industry.
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