Pengaruh Variasi Arus Listrik 110a, 120a, 130a pada Pengelasan SMAW terhadap Sifat Mekanis dan Mikrostruktur Baja AISI 1050 dengan Elektroda E7016

Abstract

AISI 1050 steel is a type of carbon steel with good mechanical strength, so it is often used in various construction applications. AISI 1050 steel is a type of medium carbon steel with a carbon content of 0.5% which is often used for making shafts, gears and others. Welding is a fabrication process in which two or more parts are joined through heat, pressure or both to form a joint when the parts cool. Welding current is a welding parameter that directly affects the penetration and melting speed of the parent metal. Adjusting the welding current strength will affect the welding results. Therefore, this research aims to determine the effect of current variations of 110A, 120A, and 130A in SMAW welding on the mechanical and microstructural properties of AISI 1050 steel with V bevel. From this research, it was found that the results of welding AISI 1050 steel with a current variation of 120A had the highest tensile strength value, namely a maximum force of 79 KN, a tensile stress of 737.21 MPa and a tensile strain of 2.5%. The highest hardness test strength value was found at a current variation of 130A, namely 239 VHN in the base metal, 339 VHN in the HAZ, 236 VHN in the weld area. For impact testing, the highest value was obtained in the 120A variation with a fracture energy value of 188.68 kg.m2/s2 and a strength value of 155.93 J/cm2