Pengaruh Variasi Colling pada Pengelasan GMAW Terhadap Uji Tarik dan Uji Kekerasan pada Baja ST 60

Warso Warso, Trio Nur Wibwo, Yuliyanti Dian Pratiwi


The technology of the manufacturing industry is increasingly developing, where the rapid development of this technology cannot be separated from the welding field. In the welding process there is thermal heat used until the material melts, the heat change will also cause changes in the structure, stress and also deformation of the material. This is because the more carbon elements are captured, the more martyred structures are formed, this causes an increase in the value of hardness and tensile strength values in a material. The purpose of this study was to determine the effect of the temperature of the cooling medium oil, salt water, water. dromus, and free air in GMAW welding on the tensile test of ST 60 steel. To determine the effect of the temperature of the cooling medium Oil, Salt Water, Dromus Water, and Free Air on GMAW welding on the tensile test and hardness test of ST 60 steel. Several methods of testing are calculating the tensile Mpa and HVN hardness. This research method uses the experimental method. The GMAW welding process uses variations of oil cooler, salt water, dromus water, and free air with a time of 25 minutes and a current of 100 A, the type of seam used is a V with an angle of 300. The tests carried out are tensile testing and hardness testing., Average value The highest tensile stress of the specimen in the brine coolant is 490.23 Mpa. The highest average value of the traic strain of free air specimens is 35.45 Mpa. The average value of HVN hardness specimens Oil 208.3 HVN, salt water 231.0 HVN, Air dromus 215.5 HVN, free air 228.0 HVN from the average value of HVN hardness the highest value was the salt water specimen of 231.0 HVN.


ST 60 material; welding; cooling; tensile test; hardness test


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