TY - CONF A1 - Weber, Gert T1 - Resistance Spot Welding of High Strength Multi Phase Steels T2 - The 3rd International Seminar on Advances in Resistance Welding N2 - In the lightweight body shell mass production of automobiles the resistance welding process for joining high strengths multi phase steels is the most important joint procedure. For uncoated and hot dip zinc coated high strength TRIP steels, complex phase steels and martensite phase steels statements on process reliability in resistance spot welding based on two- and three-dimensional weldability lobes will be given. A comparison of weldability lobes of uncoated and hot dip zinc coated high strength steel sheets with reference sheets of mild steels will be carried out. This is realized with different electrode forces for short-, medium- and longtime welds. Especially the influence of the electrode force and welding time are studied separately in two-dimensional and commonly in threedimensional weldability lobes. A procedure for welding parameter optimisation in regard to maximal process reliability for the high strength multi phase steels is applied. Based on the electrode wear and the process reliability, statements on the weldability of high strength multi phase steels are formulated. Furthermore, results on the influence of the welding parameters on the hardness and the fatigue behaviour of the spot welded joints will be given. T2 - The 3rd International Seminar on Advances in Resistance Welding CY - Berlin, Germany DA - 2004-11-16 PY - 2004 AN - OPUS4-4727 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -