Weldability of 440 MPa galvanized steel with inverter DC resistance spot welding process

• Autorzy: Hwang, I. , Yoon, H. , Kang, M. , Kim, D.
• Języki publikacji: EN

Abstrakty

EN

Purpose: This paper comparatively analyzes resistance spot weldability depending on whether or not 440 MPa-grade steel is galvanized at inverter DC spot welding. Design/methodology/approach: To compare the resistance spot weldability depending on whether or not the steel is galvanized, an inverter DC welding system was designed. Then, using this system, both tensile strength testing and macro-section testing were conducted on SPRC440 (uncoated steel) and SGARC440 (galvanized steel), and weldability was evaluated. Suitable welding conditions were calculated using the resistance spot welding variables such as electrode force, welding time and lobe diagram on the welding current. The low limit of the lobe diagram was set to the low limit of the tensile strength of 440 MPa-grade steel while the high limit was set depending on whether or not expulsion was detected. Findings: Compared to uncoated steel, galvanized steel had lower suitable welding current conditions and a narrower lobe diagram. Research limitations/implications: This paper compared resistance spot weldability and lobe diagram depending on whether or not 440 MPa-grade steel is galvanized. Practical implications: This paper confirms the weldability of galvanized steel by comparing resistance spot weldability depending on whether or not steel is galvanized. Originality/value: For analysis of resistance spot weldability depending on whether or not steel is galvanized, weldability was compared between SPRC440 (uncoated steel) and SGARC440 (galvanized steel) under the same welding conditions. As a result, compared to uncoated steel, galvanized steel had lower suitable welding current conditions and a narrower lobe diagram.

Słowa kluczowe

PL

spawalność; SGARC440; galwanizacja; SPRC440

EN

weldability; SGARC440; galvanization; SPRC440

• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2010
• Tom: Vol. 42, nr 1
• Strony: 37-44
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Hwang, I.

autor

Yoon, H.

autor

Kang, M.

autor

Kim, D.

• Advanced Joining Technology Team, Korea Institute of Industrial Technology, 7-47 Songdo-Dong, Incheon, South Korea,

Bibliografia

• [1]K.C. Kim, M.Y. Lee, T.J. Lim, Effect of Process Parameters of Heat Input Efficiency in Condenser Discharge Welding, Journal of KWS 5/1(1996) 3-5.
• [2]H.S. Jang, S.B. Joe, Real-time Measurement of Power and Dynamic Resistance in Resistance Spot Welding, Journal of KWS (2003) 143-145.
• [3]G. Mrówka-Nowotnik, J. Sieniawski, M. Wierzbińska, Intermetallic phase particles in 6082 aluminium, Archives of Materials Science and Engineering 28/2 (2007) 69-76.
• [4]M. Kciuk, The structure, mechanical properties and corrosion resistance of aluminium AlMg1Si1 alloy, Journal of Achievements in Materials and Manufacturing Engineering 16 (2006) 51-56.
• [5]J. Adamowski, M. Szkodo, FSW of aluminium alloy AW6082-T6, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 403-406.
• [6]J. Adamowski, C. Gambaro, E. Lertora, M. Ponte, M. Szkodo, Analysis of FSW welds made of aluminium alloy AW6082-T6, Archives of Materials Science and Engineering 28/8 (2007) 453-460.
• [7]T.S. Kumar, V. Balasubramanian, M.Y. Sanavullah, Influences of pulsed current tungsten inert gas welding parameters on the tensile properties of AA 6061 aluminium alloy, Materials and Design 28 (2007) 2080-2092.
• [8]E.A. Patrick, J.R. Auhl, T.S. Sun, Understanding the process mechanisms is Key to Reliable Resistance spot Welding Aluminum Auto Body Components, SAE paper 840291, 1984.
• [9]G.L. Leone, B. Altshuller, Improvement on the Resistance Spot Weldability of Aluminum Body sheet, SAE paper 840292, 1984.
• [10]W. Dilay, E.A. Rogala, E.J. Zubinski, Resistance welding aluminium for automotive production, SAE paper 77030, 1977.
• [11]A.R. Krause, P.H. Thornton, R.G. Davies, Effect of Magnesium Content, on the Fatigue of Spot-Welded Aluminum Alloys, Proceedings of the Conference "Recent Developments in Light Metals", Torronto, Ontario, Canada, 1996, 305-314.
• [12]B.M. Brown, A Comparison of AC and DC Resistance Welding of Automotive Steels, Welding Journal 66/1 (1987) 18-23.
• [13]P.K.D.V. Yarlagadda, P. Praveen, V.K. Madasu, S. Rhee, Detection of short circuit in pulse gas metal arc welding process, Journal of Achievements in Materials and Manufacturing Engineering 24/1 (2007) 328-332.
• [14]P. Praveen, M.J. Kang, P.K.D.V. Yarlagadda, Characterization of dynamic behaviour of short circuit in pulsed Gas Metal Arc Welding of aluminium, Journal of Achievements in Materials and Manufacturing Engineering 14 (2006) 75-82.
• [15]H.L Sree, A. Soumitra, Spot Weldability of Advanced High strength Steels using AC and MFDC power sources, Proceedings of the 11th Sheet Metal Welding Conference, Detroit, Michigan, 2004, 11-14.
• [16]H. Yamamoto, Recent advances in inverter controlled arc welding power sources and their application, Journal of Japan Welding Society 58 (1989) 273.