Patent ID: 8349098

Claim:
A process for producing a component from a steel product coated with a protective Al—Si coating comprising: heating the steel product coated with the Al—Si coating in a first heating stage wherein temperature and duration of the first heating stage are set such that the Al—Si coating is only partially pre-alloyed with Fe from the steel product; cooling the steel product having the partially pre-alloyed Al—Si coating; heating the cooled steel product having the partially pre-alloyed Al—Si coating, in a second heating stage, to a heating temperature, above the Ac1 temperature, at which the steel product has an at least partially austenitic structure, wherein temperature and duration of the second heating stage are set such that the Al—Si coating is fully alloyed with Fe from the steel product during the course of the second heating stage; shaping the steel product heated to the heating temperature to form the component; and cooling the component obtained in a controlled manner, in order to obtain a martensitic structure.