Resistance spot welding of martensitic stainless steel (ss420) - Part I
Badheka, Vishvesh J. , and Agrawal, S.K., and Shroff, Nandish, (2009) Resistance spot welding of martensitic stainless steel (ss420) - Part I. International Journal of Mechanical and Materials Engineering, 4 (3). pp. 328-340. ISSN 1823-0334
Official URL: http://ejum.fsktm.um.edu.my/ArticleInformation.aspx?ArticleID=822
Pandit Deendayal Petroleum University, School of Petroleum Technology
Fusion Resources, India
M.S.University of Baroda, Dept of Metallurgical & Materials Engineering.
In the present investigation, 0.5 mm thin AISI 420 grade (0.29 % C) was selected for the study and effect of welding current (W2) and post heating (W3) on nugget dimension, tensile shear strength, cross tension strength and hardness was studied and lobe diagram was generated for said material. Result shows very narrow lobe width being 1.3 KA at 4 cycles and 0.7 KA at 7 cycles. It was observed that effect of W2 and W3 variables is similar on nugget diameter. Tensile-shear breaking load increases with increase in weld current while cross-tension breaking load & ductility ratio decreases with increase in weld current. Post-heat current leads to decrease in hardness with increase in nugget diameter.
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