Patent · US Active

Method for treatng a nitrided/nitrocarburised part

US10858720B2 · kind B2 · utility

0Cited by

0References

8Claims

0Family size

Assignee

H.E.F. · FR

Inventors

Stéphan Grandjean · Riorges, FR
Fabrice Prost · Saint-Étienne, FR

Key dates

Filing date	Jul 16, 2015
Grant date	Dec 8, 2020
Priority date	—
Expiry date	Jan 21, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K2103/04
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

In a method of treating a nitrided/nitrocarburized workpiece, at least a portion of the workpiece is subjected to a first step in which at least one laser beam is moved in at least one pass over the portion, until the surface layer of the portion is transformed in part or in full, and until the distribution of the nitrogen concentration in the diffusion zone is modified. In a second step at least one laser beam is moved in at least one pass over said portion so as to enable the nitrogen concentration in the underlying diffusion layer to be reduced.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.