Wisco Tailored Blanks Gmbh

Baosteel Tailored Blanks Gmbh

Christian Both

Arndt Breuer

Christian Dornscheidt

Max Brandt

Dietmar Schaftinger

Jana Von Der Heydt

Michael Kessler

A method for producing a tailor-made semi-finished sheet metal product where two steel sheets of different material grades and/or thicknesses are joined by laser welding. At least one of the sheets is press-hardenable steel having a metallic coating of aluminium or aluminium-silicon. Filler wire is fed into the weld melt. The filler wire is substantially free of aluminium and contains at least one alloy element which promotes the formation of austenite in a content that is at least 0.1 wt. % greater than that in the press-hardenable steel. The filler wire is heated before being fed into the weld melt. The steel sheets have a gap delimited by the edges of the sheets having an average width of at least 0.15 mm. The ratio of the volume of filler wire inserted into the gap to the volume of the steel sheet material melted by the laser beam is at least 20%.

Laser welding method for producing a semi-finished sheet metal product made of hardenable steel and comprising a coating based on aluminium or aluminium-silicon

A method for laser welding one or more workpieces made of press-hardenable steel in a butt joint, wherein the workpiece or workpieces have a thickness of between 0.5 and 1.8 mm, and/or a jump in thickness of between 0.2 and 0.4 mm occurs at the butt joint, and wherein laser welding is carried out with the feed of filler wire into the molten bath, which is generated only by at least one laser beam. The filler wire contains at least one alloy element from the group comprising manganese, chromium, molybdenum, silicon and/or nickel, which alloy element promotes the formation of austenite in the molten bath generated by the laser beam, wherein said at least one alloy element is present in the filler wire in a mass percentage greater by at least 0.1 wt. % than in the steel of the workpiece or workpieces and the workpiece or workpieces used are non-coated or the coating thereof is partially removed.

Method for laser welding one or more workpieces made of hardenable steel in a butt joint

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Duisburg, Germany

Christian Both