KARAKTERISASI STAINLESS STEEL DUPLEX 2205 SEBELUM DAN SESUDAH DILAS DENGAN METODE TUNGSTEN INERT GAS (TIG)

Abstrak

Stainless Steel Duplex 2205 is stainless steel that has good toughness and corrosionresistance. 2205 Duplex Stainless Steel applications generally in the petrochemicalindustry, marine industry etc. The material used in this study was a plate of Stainless SteelDuplex 2205 with a thickness of 12 mm which was carried out by the welding process ofTungsten Inert Gas with filler ER2209 in the variations of V and X to obtain thecharacteristics of the test material in the form of microstructure, hardness, phase andresidual stress. Phase comparison shows phase weight of 66% ferrite and 34% austenite.The results of the residual stress testing are carried out in the transverse direction(parallel to the surface), normal (perpendicular to the surface) and axial (parallel to theweld direction) showing the highest residual stress in the Metal Base area. The results ofthe largest residual stress are found in the bottom of V in position 5 mm from the weldcenter with the direction of press and the magnitude of -280 MPa, with a note that themeasurements obtained are only positions 5, 7, 9, 15, 25 mm.Keywords: Stainless Steel Duplex, welding, residual stress.