Patent · US Expired

Valve seat rings made of basic Co or Co/Mo alloys, and production thereof

US7401586B2 · kind B2 · utility

1Cited by

4References

14Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Ernst Esswein · Kleinkarlbach, DE
Stefan Grau · Blaustein, DE
Tilmann Haug · Weißenhorn, DE
Alexander Sagel · Blochingen, DE

Key dates

Filing date	Jul 21, 2004
Grant date	Jul 22, 2008
Priority date	—
Expiry date	Nov 19, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49298
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A cylinder head for internal combustion engines, comprising a metallic valve seat ring that is formed by a thermally sprayed homogeneous layer made of a basic Co or Co/Mo alloy. The sum of the Co content and Mo content in the alloy exceeds 50 percent by weight while the Fe content lies below 5 percent by weight. Also disclosed is a method for thermally spraying said valve seat ring by means of an arc wire spraying process with the aid of at least two filler wires and/or composite wires, the essential Co portion in the deposited layer being delivered by the jacket of the filler wire and/or the matrix of the composite wire.

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