Robert Boschgmbh

Thomas Waldenmaier

Rainer Reimert

Jochen Schwarzer

Lothar Foerster

Laszlo Hagymasi

Michael Cesinger

Hermann Autenrieth

Lazlo Hagymasi

Marcus Hansel

David Koch

Dominic Buchholz

Siegfried Bajohr

Thomas Krug

A process for the local hardening of a workpiece by means of local induction hardening includes performing a local perlitization grain transformation on the workpiece after a local inductive diffusion heat treatment and before a local induction hardening on the workpiece.

Process for local hardening

In a process for carbonitriding metallic components (), provision is made of at least one carburization phase (CC), in which the metallic component () is carburized with a carbon-donating gas. In addition, provision is made of a nitriding phase (C, C, C), which is assigned to the carburization phase (D, D) and precedes the carburization phase (D, D). Here, in the nitriding phase, the metallic component () is nitrided by means of a nitrogen-donating gas at least superficially at at least one surface region () of the metallic component (). It is thereby possible to avoid an excessive concentration of carbon, and therefore component failure is prevented and it is possible to dispense with costly remachining steps, e.g. grinding.

Process for carbonitriding metallic components

The invention relates to a method for carbonitriding at least one component () in a treatment chamber (), in which at least one process gas () is introduced into the treatment chamber (), wherein a hydrogen content () is detected in an atmosphere developing in the treatment chamber () and is maintained in a desired range () at least at intervals by influencing of the amount of the process gas () that is fed.

Method for carbonitriding at least one component in a treatment chamber

A method for carburizing workpieces made of steel, particularly workpieces having outer and inner surfaces, the workpiece being held at a temperature in the range of 850 to 1050&#xb0; C. in an atmosphere containing a gaseous hydrocarbon. At least two different gaseous hydrocarbons are used and/or the workpiece is alternatingly held in the atmosphere containing the gaseous hydrocarbon during a carburizing pulse and in an atmosphere free of hydrocarbon during a diffusion phase. Also described is a use of the method.

Method for carburizing workpieces and its application

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Freiberg/Neckar, Germany

Thomas Waldenmaier