Research on Resistance Spot Welding Property of Hot-Stamping Quenched Steel Sheets

Abstract:

22MnMoB hot-stamping quenched steel sheets were well welded together by power frequency spot welder with optimization of relevant welding parameters in this paper. According to the experiment results of welding spatter, maximum shearing force and the size of nugget, the effects of welding current, welding time and electrode pressure on weld property were advanced. The results show that while welding current, welding time and electrode pressure are respectively set as 6.0~6.5kA, 0.5~0.7s and 4~7kN, the weld exhibits good mechanical property. The nugget diameter appears approximate linear relationship with mechanical property of weld and determines the fracture model of welds. The novel hot stamping steel sheets exhibit good welding property. The optimizing welding parameters can be used to instruct the practical production.

• Periodical: Advanced Materials Research (Volume 1063)
• Pages: 120-125
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1063.120
• Online since: December 2014
• Authors: Jun Ping Zhang*, Yi Feng, Lei Feng Song, Guang Yao Wang, Qing Sheng Jin
• Keywords: Hot-Stamping Quenched Steel Sheets, Maximum Shearing Force, Nugget Diameter, Resistance Spot Welding

References

[1] Merklein M, Lechler J. Investigation of the thermo-mechanical properties of hot stamping steels[J]. Journal of Materials Processing of Technology, 2006, 177(1-3): 452-455.

DOI: 10.1016/j.jmatprotec.2006.03.233

[2] Song Leifeng, Ma Mingtu, Guo Yihui, et al. Research state of hot stamping[J]. Engineering Science, 2012, 10(3): 46-50.

[3] Hilditch TB, Speer J G, Matlock D K. Effect of susceptibility to interfacial frature on fatigue properties of spot-weld high strength sheet steel[J]. Materials and Design, 2007, 28(10): 2566-2576.

DOI: 10.1016/j.matdes.2006.10.019

[4] AGASHE S, ZHANG H. Seletcion of schedules based on heat balance in resistance spot welding[J]. Welding Journal, 2003, 82(7): 179-183.

[5] Y.J. Chao. Failure mode of spot welds: interfacial versus pullout[J]. Science and Technology of Welding and Joining, 2003, 8(2): 133-137.

[6] Weld button criteria recommended practices for test methods for evaluating the resistance spot welding behavior of automotive sheet steel materials. American National standard, ANSI/AWS/SAE/D8. 9-97, Section 5. 7: (1997).

[7] Lin Jianping, Hu Qi, Wang Liying, et al. Spot welding property study of ultra high strength quenching steel plate USIBOR1500 [J]. Chinese Journal of Construction Machinery, 2007, 5(3): 317-321.

[8] Pouranvari, Marashi. Critical review of automotive steels spot welding[J]. Science and Technology of Welding and Joining, 2013, 18(5): 361-403.

DOI: 10.1179/1362171813y.0000000120

[9] M. Pouranvari, S.P.H. Marashi. Failure mode transition in AHSS resistance spot welds. Part I. Controlling factors[J]. Materials Science and Engineering A, 2011, 528: 8337-8343.

DOI: 10.1016/j.msea.2011.08.017