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US 2021/0079490 A1Published application
Process for Local Hardening
AssigneeRobert Bosch GmbH
InventorsHermann Autenrieth, Marcus Hansel, Michael Cesinger, Thomas Waldenmaier
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Abstract
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.
Claims20
A process for the local hardening of a workpiece comprising:
- performing a local inductive diffusion heat treatment on the workpiece;
- performing a local perlitization grain transformation on the workpiece after the local inductive diffusion heat treatment;
- and
- performing a local induction hardening on the workpiece after preforming the local perlitization grain transformation on the workpiece.
1 more element
The process according to claim 4, wherein the local perlitization grain transformation is carried out at a temperature which is significantly lower than the temperature at which the local induction hardening is carried out.
Dependencies are inferred from the claim text.