METHOD FOR PRODUCING HARDENED STRUCTURAL ELEMENTS

摘要

The invention relates to a method for producing a hardened structural steel element comprising a zinc or zinc alloy coating. According to the method, a blank is stamped out from sheet metal that is coated with the zinc or zinc alloy, the stamped-out blank is heated to a temperature =Ac3 and optionally held at this temperature for a predetermined time to allow the formation of austenite, and the heated blank is then transferred to a forming tool, is formed in the forming tool and cooled in the forming tool at a rate above the critical quenching rate, thereby being hardened, and the steel material is adjusted to delay conversion such that the steel material is quench-hardened by the conversion of austenite to martensite at a forming temperature in the range of 600°C to 800°C, particularly 730°C to 782°C and more particularly below the peritectic temperature of the zinc-iron phase diagram.