Patent · US Active

Method for producing a sliding surface

US11198932B2 · kind B2 · utility

0Cited by

2References

8Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Oliver Witter · Lauchheim, DE
Klaus Feldner · Dresden, DE
Stefan Dupke · Ködnitz, DE
Holger Patzold · Burgebrach, DE
Frank Schlerege · Herzogenaurach, DE
Serge Kursawe · Uttenreuth, DE

Key dates

Filing date	Mar 23, 2018
Grant date	Dec 14, 2021
Priority date	—
Expiry date	Oct 14, 2038

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16C33/14
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A method for producing a reduced friction sliding surface on a machine element includes applying a coating comprising amorphous carbon to a surface of the machine element and locally heating the coating with a laser. The coating is heated to a temperature below an evaporation temperature of the coating to achieve a local volumetric increase in the coating and a local increase in a layer thickness of the coating. A surface structure of the coating includes a multiplicity of elevations resulting from a local phase transformation of the coating from amorphous carbon into graphite due to the locally heating.

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