[논문]Microstructure and Tensile Properties of SS400 Carbon Steel and SUS430 Stainless Steel Butt Joint by Gas Metal Arc Welding

Poonnayom, Pramote; Chantasri, Sakchai; Kaewwichit, Jesada; Roybang, Waraporn; Kimapong, Kittipong

doi:10.17703/ijact.2015.3.1.61

Microstructure and Tensile Properties of SS400 Carbon Steel and SUS430 Stainless Steel Butt Joint by Gas Metal Arc Welding 원문보기

The International journal of advanced culture technology, v.3 no.1, 2015년, pp.61 - 67

Poonnayom, Pramote (Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi) , Chantasri, Sakchai (Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi) , Kaewwichit, Jesada (Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi) , Roybang, Waraporn (Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi) , Kimapong, Kittipong (Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi)

Abstract ▼ AI-Helper

The application of SS400 carbon steel and AISI430 ferritic stainless steel joint has been increased in industries because of the advantage of both metals was able to increase the service lifetime of the important structures. Therefore, a fusion welding process that could produce a sound weld and good joint properties should be optimized. This research is aimed to weld a butt joint of SS400 carbon steel and AISI430 ferritic stainless steel using Gas Metal Arc Welding (GMAW) welding process and to study the effects of welding parameters on joint properties. The experimental results were concluded as follows. The optimized welding parameter that produced the tensile strength of 448 MPa was the welding current of 110A, the welding speed of 400 mm/min and the mixed gas of $80%Ar+20%CO_2$. Increase of the welding current affected to increase and decrease the tensile strength of the joint, respectively. Lower welding current produced the incomplete bonding of the metals and indicated the low tensile strength. Microstructure investigation of the welded joint showed a columnar grain in the weld metal and a coarse grain in the heat affected zone (HAZ). The unknown hard precipitated phases were also found at the grain boundaries of the weld metal and HAZ. The hardness profile did not show the difference of the hardness on the joint that was welded by various welding currents but the hardness of the weld metal was higher than that of the other location.

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These consisted of the welding of martensitic stainless steel to austenitic stainless steel [4], the welding of duplex stainless steel to carbon steel [5], the welding of austenitic stainless steel to inconel [6], the welding of austenitic stainless steel to titanium [7]. These studies have been done for optimization of the electrode for welding the dissimilar metals joint consisting of the stainless steel.

제안 방법

The optimization of the GMAW process parameters for welding the butt joint of dissimilar carbon steel/ stainless steel has still not been reported and prepared for a sugar industry. Therefore, the objective of this work was to weld the butt joint between JIS SS400 and JIS SUS430 and study the effects of welding current on the joint properties. The butt joint that was welded by the specified welding parameter, was investigated for the relation between tensile strength, the hardness and microstructure of the joint.
This research work applied GMAW for welding the butt joint of SS400 carbon steel and SUS430 stainless steel and studying the effects of welding current on the joint properties. The summarized results are as follows.

대상 데이터

Welding process parameters were a welding current of 90-120 A, a welding speed of 400 mm/min, a shielded gas, which was a mixed gas of 80%Ar+20%CO₂, a gas flow rate of 12 L/min, a backing shielded gas flow rate of 5 L/min. A solid wire electrode with a wire diameter of 1.2 mm that was recommended for the SUS430 stainless steel followed AWS A5.9: ER430 and chosen for welding the joint.
Materials used in this experiment were JIS SS400 carbon steel (Fe-0.08%C, 0.20Si, 0.39%P, 0.01%S, 0.03%Cr, 0.01%Mo, 0.05%Ni, in %wt) and JIS SUS430 stainless steel (Fe-0.119%C, 0.36Si, 0.23%Mn, 0.03%P, 17.57%Cr, 0.12%Ni, in %wt). The materials were prepared into a rectangular shape with a dimension of 65 mm wide, 80 mm long and 3 mm thick.
1 M: 2600. The SS400 steel plates (a dimension of 200 mm wide, 50 mm long and 3 mm thick) were 4 points tag welded using a gas metal arc welding at the ends of the joint for setting up the butt joint that had a root opening of 1 mm as shown in figure 1. The butt joint was firmly clamped using the fixture via copper plates on the steel table as shown in figure 2.
12%Ni, in %wt). The materials were prepared into a rectangular shape with a dimension of 65 mm wide, 80 mm long and 3 mm thick. The butt surfaces of the material plates were mechanically prepared to be a V-groove followed AWS D1.

참고문헌 (9)

Branes, T.A. and Pashyby, I.R, Joining Techniques for Aluminum Spaceframes used in Automobiles Part I-Solid and Liquid Phase Welding, Journal of Materials Processing Technology, Vol. 99, pp. 62-71, 2000.

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Brandon, D. and Kaplan, W.D, Joining Processes, An introduction, New York, John Wiley&Sons, 1997
Srinivanan, P.B., Muthupandi, V., Dietzel, W., Sivan, V., "An assessment of impact strength and corrosion behaviour of shielded metal arc welded dissimilar weldments between UNS 31803 and IS 2062 steels," Materials and Design, Vol. 27, pp. 182-191, 2006.

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Kacar, R. and Baylan, O., "An investigation of microstructure/property relationships in dissimilar welds between martensitic and austenitic stainless steels," Materials and Design, Vol. 25, pp. 317-329, 2004.

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Bala-Srinivasan, P., Muthupandi, V., Dietzel, W., Sivan, V., " An assessment of impact strength and corrosion behaviour of shielded metal arc welded dissimilar weldments between UNS 31803 and IS 2062 steels," Materials and Design, Vol. 27, pp. 182-191, 2006,

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Naffakh, H., Shamanian, M., Ashrafizadeh, F., "Dissimilar welding of AISI 310 austenitic stainless steel to nickel-based alloy Inconel 657," Journal of Materials Processing Technology, Vol. 209, pp. 3628-3639, 2009,

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Lee, H.T., Jeng, S.L. Yen, C.H., Kuo, T.Y., " Dissimilar welding of nickel-based Alloy 690 to SUS 304L with Ti addition," Journal of Nuclear Materials, Vol. 335, pp. 59-69, 2004.

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Hyeong-Yeon Lee, Se-Hwan Lee, Jong-Bum Kim and Jae-Han Lee, "Creep-fatigue damage for a structure with dissimilar metal welds of modified 9Cr-1Mo steel and 316L stainless steel," International Journal of Fatigue, Vol. 29, pp. 1868-1879, 2007.

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Das, C.R., Bhaduri, A.K., Srinivasan, G., Shankar, V., Mathew, S., " Selection of filler wire for and effect of auto tempering on the mechanical properties of dissimilar metal joint between 403 and 304L(N) stainless steels," Journal of materials processing technology, Vol. 209, pp. 1428-1435, 2009,

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Microstructure and Tensile Properties of SS400 Carbon Steel and SUS430 Stainless Steel Butt Joint by Gas Metal Arc Welding 원문보기

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Microstructure and Tensile Properties of SS400 Carbon Steel and SUS430 Stainless Steel Butt Joint by Gas Metal Arc Welding 원문보기

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