HIGH-PRECISION SINTERED CAM LOBE MATERIAL

WIPO Patent Application WO/2004/031429

A1

A high-precision sintered cam lobe material that while having high anti-wear and anti-pitching properties, even when it is intended to fabricate a cam lobe of complex configuration, realizes high dimensional accuracy and unnecessitates grinding after assembly; a process for producing the same. In particular, a high-precision sintered cam lobe material consisting of a sintered cam lobe material obtained by performing compression molding and sintering of sinter powder once or multiple times so as to form a molding of given configuration and further tempering according to necessity. The sintered cam lobe material is constituted of an iron base sintered alloy comprising one or both of 0.3 to 5.0 wt.% of Ni and 0.2 to 4.0 wt.% of Cu, 0.5 to 1.2 wt.% of C, unavoidable impurities and the balance of Fe. The sintered cam lobe material has a density of 7.3 g/cm³ or more and a cam circumferential hardness of 45 or higher HRC, and the ratio of dimensional change of sintered body obtained in the final sintering step from molding obtained in the final compression step is within ±0.5%.

JPS6038442	[Title of the Invention] A manufacturing method of aluminium alloy low density sintering parts
JPS5326210	BALK RING OF IRON SYSTEM SINTERED METAL MADE

TAKAMURA HIROYUKI (JP)

PCT/JP2003/012021

April 15, 2004

September 19, 2003

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NIPPON PISTON RING CO LTD (JP)
TAKAMURA HIROYUKI (JP)

B22F3/12; B22F3/24; C22C33/02; C22C38/00; C22C38/08; C22C38/10; C22C38/16; F01L1/04; F16H53/02; (IPC1-7): C22C38/00; C22C38/16; C22C33/02; B22F3/24; F16H53/02; F01L1/04

JPH1150210A	1999-02-23
JPH11140604A	1999-05-25
EP1097770A1	2001-05-09

Kishimoto, Tatsuhito c/o Tokyo, Central Patent Firm (4th Floor Oak Building Kyobashi, 16-10, Kyobashi 1-chom, Chuou-ku Tokyo, JP)

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