METHOD FOR MANUFACTURING A COATED PART USING HOT FORMING TECHNIQUES

摘要

The invention relates to a method for manufacturing a coated part having very high mechanical properties using hot forming techniques. According to the invention, the method comprises the following steps: 1 - providing a steel strip 2 - coating the steel strip with a layer of zinc or zinc alloy 3 - heating the coated steel to a temperature between 300°C and the Ac1 temperature of the steel 4 - cooling the coated steel 5 - cutting a blank from the strip after step 1, 2, 3 or 4 6 - heating the blank to a temperature above the Ac1 temperature of the steel 7 - hot forming the blank into a part 8 - hardening the hot formed part. The invention can also be performed without step 4. The invention can also be used for the indirect hot forming method. The invention also relates to a method for manufacturing a coated steel strip, and to a coated steel strip, blank or part and a hot formed part.