BUTT-JOINT BETWEEN SUS-304 STAINLESS STEEL AND SS400 STEEL BY GTAW PROCESS

Nguyen Quoc Manh; Pham Van Duoc

Nguyen Quoc Manh Faculty of Mechanical Engineering, Hung Yen University of Technology and Education
Pham Van Duoc Vocational College of Engineering and Technology

Keywords: GTAW process, SUS-304 stainless steel, SS400 steel, ER-309L weld-rod, Tensile strength, Micro-hardness

Abstract

In this research, the changes in the microstructures and mechanical properties in the welding zone and heat-affected zone (HAZ) of the welds between 304 stainless steel and SS400 carbon steel by Tungsten Inert Gas (TIG) with ER-309L welding rod were investigated. The formation of the micro-structure in areas, including the columnar-dendritic, was investigated by micro-cope equipment. The tensile strength results of weld-joint were performed on nine specimens using a Universal tensile and compression machine at Hung Yen University of Technology and Education show that the tensile of welds between SUS-304 stainless steel and SS400 carbon steel was achieved at 457MPa.

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