Pengaruh Variasi Kecepatan Dan Kuat Arus Terhadap Kekerasan, Tegangan Tarik, Struktur Mikro Baja Karbon Rendah Dengan Elektroda E6013

Low carbon steel can be welded with all kinds of electric welding using shielded metal arc welding (SMAW), therefore it is compulsory that the design and method of welding should match to the behavior of welding, the material properties to be welded, utilizing of the construction and surrounded circumstances. In this research the influence of welding speed and current on hardness, ultimate strength and micro structure of materials will be investigated. The results show that the highest value of average VHN (Vickers Hardness Number) of specimens occurred at currents 80A with a speed of 0.35cm/sec and currents100A with a speed of 0.37cm/sec. While in the tensile test, the highest ultimate strength was resulted at currents 80A and a speed of 0.15cm/sec. In captured microstructure on HAZ region (Heat Affected Zone), can be seen the irregular elements in the area HAZ ferrite and perlite Based on these results, it can be concluded that, hardness value tend to be higher if low current and higher welding speed used