PROCEDE DE FABRICATION D'UNE SOUDURE PAR POINTS PAR RESISTANCE

• Main Authors: GHASSEMI-ARMAKI, Hassan, CHAKRABORTY, Anirban, CHALLA VENKATASURYA, Pavan, GIRINA, Olga, PANAHI, Damon, BENLATRECHE, Yacine, PIPARD, Jean-Marc, CREMEL, Sébastien
• Format: Patent
• Language: French
• Published: 13.10.2021
• Subjects: ALLOYS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MACHINE TOOLS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM

This method comprises the steps of:- providing at least two zinc or zinc-alloy coated sheets of a steel (1),- measuring C1av(100), Si1av(100), Mn1av(100), Al1av(100), Cr1av(100), , then- calculating the factor CSI1 of steel (1): CSI1=C1av100+Si1av100/32+Mn1av100/14−Al1av100/48+Cr1av100/11 then,- performing resistance spot welding,- measuring the average number Crack1av of Liquid Metal Embrittlement,- providing a second zinc or zinc-alloy coated steel sheet (2), the composition of steel (2) being selected so as : CSI2<CSI1−Crack1av−2/20- performing resistance spot welding on the steel sheet (2) with said intensity I1.