Method for producing hardened steel components with a conditioned zinc alloy anti-corrosive layer
Assigneevoestalpine Stahl GmbH
InventorsErnst Schachinger, Martin Fleischanderl
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Assigneevoestalpine Stahl GmbH
InventorsErnst Schachinger, Martin Fleischanderl
Estimating the term…
A method for producing hardened steel components is provided. Sheet bars are cut out from an alloy-galvanized strip made of a hardenable steel alloy and the sheet bars are heated to a temperature that produces a structural change to austenite, preferably to a temperature above the respective Ac3 point. The austenitized sheet bars are then conveyed to a press hardening tool in which the sheet bars are hot formed in a single stroke or multiple strokes by means of an upper and lower tool, wherein the formed sheet bar is cooled against the tools at a speed above the critical cooling rate so that a martensitic hardening occurs. After the galvanization, which can be hot-dip galvanization of the steel strip and before the temperature increase for achieving the austenitization, tin is applied to the surface of the strip or sheet bar.
A method for producing hardened steel components, comprising the steps of:
A method of using a galvanized steel strip formed from a hardenable steel alloy and having a zinc or zinc-based alloy coating and an oxide layer on the zinc or zinc-based alloy coating, comprising the steps of:
Dependencies are inferred from the claim text.