| dc.description.abstract | FEASIBILITY STUDY OF WELDING WIRE FOR LOW CARBON STEEL WELDING ON HEAVY EQUIPMENT COMPONENTS BASED ON WELDING STRENGTH AND MICROSTRUCTURE ANALYSIS.
This study describes the feasibility of welding wire for welding low carbon steel on heavy equipment components on welding strength and microstructure. This study aimed to analyze the mechanical strength and microstructure of welding wire types A and B. The methods used were the tensile test, Vickers hardness test, spectrometry test, and metallographic test. The highest tensile strength value of 472.5 MPA is found in type B welding wire which is type B welding wire with high strength, the lowest tensile strength value of 448.9 MPA is found in type A welding wire which type A welding wire with low strength. From the results, it can be concluded that the strength value is proportional to the hardness. The highest average hardness value of 163 HV is found in type A welding wire, which types A welding wire with the lowest heat input. The lowest average hardness value of 161 HV is found in type B welding wire, which is type B welding wire with the highest heat input. From the results, it can be concluded that the hardness value is inversely proportional to the heat input. The composition value of %Carbon in SS400 (base metal), type A welding wire, and type B welding wire is 0.23%, 0.068%, and 0.070%, respectively. From the results, it can be concluded that the composition value of %Carbon is directly proportional to the hardness and strength. Furthermore, the metallographic test obtained pearlite and ferrite results. The result of the highest pearlite content in weld metal type B welding wire is 17.33% and the highest ferrite content results in weld metal type A welding wire is 83.60%. This content can affect the strength of the material where the more pearlite content, the higher the resulting strength, on the contrary, the more ferrite content, the lower the resulting strength. | en_US |
