Effects of aluminium and sulphur on resistance spot weldability of steels
by P.C. Pavlik, J.M. Dowling, H.W. Kerr, P. Niessen
International Journal of Materials and Product Technology (IJMPT), Vol. 4, No. 1, 1989

Abstract: Spot weldability, as measured by the peel test, has been studied for galvanized sheet steels with variations in: (i) aluminium content in the zinc coating and (ii) sulphur content within the sheet steel. A response surface statistical analysis was employed, using a range of welding currents and times. The results indicate that the aluminium content, over the range 0.14 to 0.32 wt% may increase weldability by increasing the range of currents which will produce acceptable button sizes. However, very slight increases in sulphur level can reduce weldability, due to a combination of small spacing of sulphide inclusions and high hardness causing poor fracture resistance within the weld metal.

Online publication date: Sat, 06-Nov-2010

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