Patent ID: 8252125

Claim:
A method for producing a workpiece by press hardening a semi-finished product is hereby characterized in that the semi-finished product consists of a steel, which has a high silicon content of at least 0.9 wt. %, with a simultaneously small content of manganese of less than 0.9 wt. %, a small carbon content of less than 0.25 wt. %, a high chromium content of more than 1.20 wt. %, an aluminum content up to a maximum of 0.01 wt. %, and the remainder being iron and unavoidable contaminants, and which by heating is brought to a state in which the structure of the steel that is used is at least partially transformed to austenite and the thus-heated semi-finished product is hot shaped so that after the hot deformation shaping, a structure is present in the workpiece that has a complex phase structure with predominantly martensite and ferrite fractions.