Effect of Chemical Composition of Welding Wire and Low Temperature Steel Plate on the Weld Properties Made by SAW

Abstract:

Chemical composition effect on the weld properties for low temperature steel was evaluated. The alloy elements of interest at the weld metal were Cr and Mo, which come from the steel plate and welding wire, respectively. Both side one run SAW process was carried out in a Ygroove butt joint. Microstructure of the weld metal is strongly dependent on the chemical composition of the steel plate and the welding wire, due to high dilution. The microstructure of the weld metal became fine acicular ferrite by increasing Cr and Mo content because of high hardenability effect. The weld metal having Cr and Mo possessed the highest impact toughness at low temperatures among the weld metals studied. Cr seems to have more effect than Mo on the toughness of the weld metal.

• Periodical: Materials Science Forum (Volumes 580-582)
• Pages: 57-60
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.580-582.57
• Online since: June 2008
• Authors: Hee Joon Sung, Yeon Baeg Goo, Kyeong Ju Kim, Kee Young Choi
• Keywords: Cr, Ferrite with Second Phase, Impact Property, Low Temperature Material, Mo, Primary Ferrite, SAW Process

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