Coated component

Patent metadata

Field	Value
Publication number	US-2016115997-A1
Application number	US-201414890525-A
Country	US
Kind code	A1
Filing date	Apr 23, 2014
Priority date	May 28, 2013
Publication date	Apr 28, 2016
Grant date	—

Abstract

A coated component, in particular to a rolling bearing part, made from a metallic substrate ( 2 ), and a PVD coating ( 3 ), which is applied to the substrate ( 2 ), formed of chromium and having a thickness of less than 2 μm, wherein the PVD coating ( 3 ) forms the surface of the component, and a compound of chromium and at least one further element is formed on the component surface.

First claim

1 . A coated component, comprising
a metallic substrate, a PVD coating made from chromium and deposited on the substrate with a thickness of less than 500 nm and greater than 100 nm, wherein the PVD coating forms a surface of the component and a barrier made from a compound of chromium and at least one additional element is formed on said component surface, and the at least one additional element is oxygen or nitrogen or both.

2 . A component according to claim 1 , wherein the metallic substrate is formed of rolling bearing steel.

3 . The component according to claim 1 , wherein the metallic substrate is formed of 100 Cr6 or M50NIL.

4 . The component according to claim 1 , wherein the hardness of the PVD coating is at least 800 HV 0.05.

5 . The component according to claim 1 , wherein the hardness of the PVD coating is at most 1200 HV 0.05.

6 . The component according to claim 1 , wherein the nitrogen forms the barrier from chromium nitride with the chromium of a chromium layer.

7 . The component according to claim 6 , wherein the chromium nitride is present in nanocrystaline form and a portion of Cr2N phase is >70%.

8 . The component according to claim 1 , wherein the component is a rolling bearing part.

9 . A process for producing a coated component, comprising the following steps:
providing a metallic substrate, depositing a PVD coating as a chromium layer with a thickness of less than 500 nm and greater than 100 nm on the substrate in a PVD process while forming a component surface, and forming a barrier made form a chromium compound of the chromium layer and at least one additional element on the component surface, with the at least one additional element comprising oxygen or nitrogen or both.

10 . The process according to claim 9 , wherein the deposition of the chromium layer takes place through sputtering.

11 . The process according to claim 10 , wherein a barrier made from chromium nitride is formed on the component surface through reactive sputtering with nitrogen in connection with the chromium of the chromium layer.

12 . The process according to claim 9 , wherein a barrier made from chromium oxide is formed on the component surface by supplying air to a coating chamber used for forming the chromium layer at a temperature between 130° C. and 160° C.

13 . A rolling bearing comprising a component according to claim 1 as at least one of a bearing ring or a rolling body.

Assignees

• Schaeffler Technologies Ag

Inventors

• Haag Bertram
• Musayev Yashar
• Holweger Walter
• Blass Toni
• Hosenfeldt Tim Matthias
• Grunau Arbogast

Classifications

• C23C14/5853

  Oxidation · CPC title

• C23C14/5806

  Thermal treatment · CPC title

• C23C14/165

  by cathodic sputtering · CPC title

• F16C2202/04

  Hardness · CPC title

• C23C14/586

  Nitriding · CPC title