Analisa Pengaruh Variasi Arus Terhadap Cacat Las Dan Defleksi Pada Material Baja Karbon St.37 Dengan Pengelasan Mig

  • Ahmad Rosyadi
  • Imran Imran Politeknik Negeri Bengkalis
Keywords: MIG welding,welding voltage, Ultrasonic Test, bending Test.


MIG (Metal Inert Gas) welding is the process of joining two or more metal materials together through a local liquefaction process, using the electrode roll (filler metal) which is the same as the base metal (base metal) and using a protective gas (inert gas). This study aims to determine defects and deflections and get the right current at the base metal with MIG welding. The currents used in this study are 100 Ampere, 125 Ampere and 150 Ampere with a seam angle of 60 °. Based on the ultrasonic test results, the lack of sidewall fusion defects in the 100 A current specimen and slag inclusion in the 125 Ampere and 150 Ampere current specimens. While the bending test results obtained with the lowest value in the 100 Ampere specimen with a value of 459.40 N / mm2 . While the value of the highest bending strength in the current specimen is 150 Ampere with a value of 944.17 N / mm2. In the current specimen of 125 Ampere, the bending strength value is 617.45 N / mm2. Welding of ST.37 carbon steel using MIG welding in order to get good results should use a current of 150 Ampere.