STUDY ON EFFECT OF OXYGEN AND CACBONIC RATIO IN ARGON ON STAINLESS STEEL SURFACE QUALITY AND WELDING SIZE BY MIG PROCESS USING FLUX CORED WIRE
Shape and size of the weld in fusion welding has a great influence on the welded quality and working ability. Factors that may change the welded shape and size are the welding conditions, welding technologies, shielding gas, etc. Therefore, use of gas and ratio of shielding gas has a significant influence on the weld size. In this study, SUS 304 (Cr-Ni) steel was automatically welded by MIG (Metal Inert Gas) welding process with mixed gas (O2 in Ar and CO2 in Ar) using K-308LT flux cored welding wire under given current and welding voltage. Results show that the shape, size as well as the surface quality change in changing the shielding gas mixing ratio of O2 and CO2 in Ar. This result will be a useful basis to choose appropriate solution for welding Cr-Ni stainless alloy steel with flux cored wire.
Nghiêm Hùng, Vật liệu học cơ sở, 2000, Nhà xuất bản Khoa học và Kỹ thuật Hà Nội.
Ngô Lê Thông, Công nghệ hàn điện nóng chảy (tập 2), 2004, NXB KH&KT Hà Nội.
TusÆek*, Marjan Suban, Experimental research of the effect of hydrogen in argon as a shielding gas in arc welding of high-alloy stainless steel. International Journal of Hydrogen Energy, 2000, vol. 25(4), pp. 369-376.
Behçet Gülenç, Kaya Develi, Nizamettin Kahraman, Ahmet Durgutlu, Experimental study of the effect of hydrogen in argon as a shielding gas in MIG welding of austenitic stainless steel. International Journal of Hydrogen Energy, 2005, Vol. 30 (13–14), pp 1475-1481.
Lama Moussawi-Haidar, Nagihan Çömez-Dolgan et al. Gas influence on the arc shape in MIGMAG welding. The European Physical Journal Applied Physics, 2008, vol. 43(01), pp. 111 – 122.
P. Kah & J. Martikainen, Influence of shielding gases in the welding of metals. The International Journal of Advanced Manufacturing Technology, 2013, vol. 64, pp.1411–1421.
T. Nakamura,K. Hiraoka &S. Zenitani, Improvement of MIG welding stability in pure Ar shielding gas using small amount of oxygen and coaxial hybrid solid wire. Science and Technology of Welding and Joining, 2008, Vol. 13 (1), pp. 25-32.