| 摘要 |
The present invention shows procedures for the production of thin-walled parts made of steel, which show an inner core layer and outer surface layers, in which the layers are at least partly differently treatable related to strength and/or hardness qualities, showing the procedure steps: connecting of core and surface layers from differently treatable 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, heat treatment of the parts after which the layers of the differently treatable steel alloys show different strength and/or hardness qualities. |
