Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Reexamination Certificate
2007-06-26
2007-06-26
Mai, Ngoclan T. (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
Reexamination Certificate
active
10447580
ABSTRACT:
A powder metal component particularly suited for use as a valve guide in high temperature applications. The powder metal component according to a first embodiment has a chemical composition on a weight percent basis of about 0.1-2.0% C; about 8.0-18.0% Cr; about 1.0-15.0% Mo; about 0.1-3.5% S; about 0.1%-2.0% Si; upto about 5.0% max other elements; and the balance being substantially Fe. A second embodiment according to the present invention includes about 8.0-16.0% Co.
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Sintered Valve Seat Inserts and Valve Guides: Factors Affecting Design, Performance & Machinabillity, H. Rodrigues, Admitted Prior Art.
Martus Kevin J.
Narasimhan Sundaram L.
Rodrigues Heron A.
Shubhayu Sinharoy
Eaton Corporation
Kalka Daniel S.
Mai Ngoclan T.
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