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

Details Valve seat rings made of basic Co or Co/Mo alloys, and... Valve seat rings made of basic Co or Co/Mo alloys, and...

2008-07-22

2008-07-22

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Valve

Reciprocating valve

C123S188800, C029S888400

Reexamination Certificate

active

07401586

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.

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Popoola et al.: “Novel Powertrain Applications of Thermal Spray Coatings,” Surface Engineering, 1998, pp. 107-112, vol. 14, No. 2, The Institute Of Materials, London.

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