Open AccessEffects of welding on the change of microstructure and mechanical properties of low carbon steel
Author(s) -
Husaini Husaini,
Nurdin Ali,
Jon Kadri Hamza,
Sarwo Edhy Sofyan
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/523/1/012065
Subject(s) - welding , materials science , heat affected zone , metallurgy , shielded metal arc welding , charpy impact test , base metal , arc welding , electric resistance welding , flash welding , pearlite , microstructure , composite material , gas metal arc welding , carbon steel , toughness , austenite , corrosion
Steel construction is mostly connected by using a welding technique. The result of the welding process can cause the change of mechanical properties of the welding zone. Therefore, it needs to be reviewed to guarantee the quality of the welding zone. This research aims to assess the effect of welding on the change of microstructure and the mechanic characteristic of welded connection. Low carbon steel was welded by using Shield Metal Arc Welding method (SMAW) with electrode E7016, diameter 2,6 mm. Type of notch used was single V with angle 70° and welding position was 1G. Then, the Charpy impact test, Rockwell hardness and micro-macro structure monitoring on the welding zone including base metal, Heat Affected Zone (HAZ) and weld metal, are conducted. The results show that the highest impact toughness value at metal welding area is 251 joule/mm 2 , and lowest impact toughness is at the heat affected area (HAZ) is 119 joule/mm 2 . Hardness values of welding zones are found of about 87,6 HR B for weld metal, 73,9 HR B for HAZ zone and 67,1 HR B for the base metal. The microstructure of weld metal zone, HAZ and base metal are included on ferrite and pearlite formed by welding on low carbon steel AISI 1010 observer by using an optic microscope.