Process for producing thin-walled steel structural part and thin-walled steel structural part produced in such a manner

摘要

In the present invention, there is disclosed a process for producing thin-walled structural parts made of steel, which show an inner core layer and outer surface layers, in which the layers are at least partly differently tempered, characterized by the following steps: connecting of core and surface layers from differently temperable steel alloys in a casting procedure to a composite material with alloy gradient going flatly at the interfacials, deforming of the composite material on the size of the thin-walled parts, and heat treating the thin-walled parts for martensitic or bainitic hardening of at least one layer thereof. The thin-walled steel structural part produced by the above-described process exhibits hardened outer layers (A) and one unhardened core layer (B).