Sintered metal articles

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B - Operations, Transporting

22

F

277/29, 148/32

B22F 3/24 (2006.01) B22F 5/02 (2006.01) C22C 33/02 (2006.01) C23C 8/00 (2006.01) F16J 9/26 (2006.01)

Patent

CA 1113354

ABSTRACT OF THE DISCLOSURE A sintered metal article such as a piston ring or a sealing ring (in particular those having a cross-section area not exceeding 20 mm2) having a density which is at least 88.5% of the theoretical density, having a fine machined surface finish, and having a nitrocarburised surface layer which is not found at a depth of more than about 250 microns from the surface. The invention also includes the process of manufacturing such an article.

307638

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