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AssigneeSalzgitter Europlatinen GmbH
InventorsHans-Christian Schmale, Matthias Höfemann, André Kröff, Joachim Schöttler, Manuel Maikranz-Valentin
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A tailored welded blank produced from at least two blank parts, where at least one is a press-hardenable manganese-boron steel and at least one has a coating of aluminum or an aluminum-based alloy. The parts are welded by laser-beam welding or hybrid laser/gas-metal-arc welding, while retaining the coating, using shielding gas and a filler wire having in % by weight: C: 0.41 to 0.9; Si: 0.4 to 4; Mn: 0.4 to 3; optionally Cr: 0 to 10; and with optional alloying of one or more of: Mo: 0.01 to 1.0; B: 0.0008 to 0.0040; Ti: 2.5×B<=Ti<=5×B; V: 0.01 to 0.4; Nb: 0.01 to 0.2; W: 0.01 to 0.2; the remainder Fe and unavoidable impurities. The high proportion of C and Cr or additionally or alternatively of Mo, V, Nb and/or W enables hardening by carbide formation in a weld-seam region after welding.
A method for producing a tailored blank from at least two blank parts, wherein at least one blank part comprises a press-hardenable manganese-boron steel, and wherein at least one blank part is provided on at least one side with a coating comprising aluminum or an aluminum-based alloy and the said method comprising:
A filler wire for the laser beam welding or laser-metal inert gas hybrid welding using inert gas for the integrally bonded connection of a tailored blank comprising at least two blank parts, of which at least one blank part comprises a press-hardenable manganese-boron steel and of which at least one blank part is provided on at least one side with a coating consisting of aluminum or an aluminum-based alloy, wherein the filler wire comprises the following chemical composition in wt. %:
Dependencies are inferred from the claim text.