Method for producing coated and hardened components of steel and coated and hardened steel strip therefor

摘要

The invention relates to a method for the production of a hardened component made of a hardenable steel, wherein the steel strip is exposed to a temperature increase in an oven, and is thus exposed to an oxidizing treatment such that a surface oxide layer is created, and subsequently a coating using a metal or a metal alloy is carried out. The strip is heated and at least partially austenitized for producing an at least partially hardened component, and subsequently cooled and thereby hardened. The invention also relates to a steel strip produced according to said method.

主权项

1. A method for producing a hardened component from a hardenable steel, comprising:
subjecting a steel strip of a type 22MnB5 to a temperature increase and, in the process, an oxidizing treatment in a furnace chamber, so that a superficial oxide layer is produced; after the superficial oxide layer has been produced, coating the steel strip with a metal or a metal, alloy, and, in order to produce an at least partially hardened component, heating the strip and at least partially austenitizing the strip and then cooling off and thus hardening the strip; and in order to produce a superficial ductile layer, partially reducing oxides at the surface of the strip prior to coating the strip with a metal or a metal alloy, thus producing a very thin reduced layer located on a residual oxide layer; wherein an area of an inner oxidation is located beneath the residual oxide layer in the strip, in which steel-alloy elements are present in a partially oxidized form.