Title:
CAM LOBE MEMBER, CAMSHAFT USING THE SAME AND METHOD FOR PRODUCING CAM LOBE MEMBER
Document Type and Number:
WIPO Patent Application WO/2005/010226
Kind Code:
A1
Abstract:
A cam lobe member which comprises an iron based sintered alloy which contains 0.3 to 5.0 mass % of Ni, 0.5 to 1.2 mass % of C, 0.02 to 0.3 mass % of at least one of B and P, and the balanced amount of inevitable impurities, has a hardness of the peripheral surface thereof of HRC 50 or more, and has a density of 7.5 g/cm3 or more; and a method for producing the cam lobe member which comprises providing an iron based alloy powder prepared so as to have the above composition of an iron based alloy, repeating two or more times a compression forming step of forming the alloy powder by compression into a prescribed cam lobe shape and a sintering step of sintering the resultant formed article, and then quenching and tempering the sintered article. The above iron based sintered alloy may further contain 2.5 mass % or less of Mo. The cam lobe member is excellent in the resistance to sliding such as abrasion resistance, scuffing resistance and pitting resistance, and thus can be suitably used for an engine to be operated under heavy load.
Inventors:
TAKAMURA HIROYUKI (JP)
TAKEGUCHI SHUNSUKE (JP)
TAKEGUCHI SHUNSUKE (JP)
Application Number:
PCT/JP2004/010736
Publication Date:
February 03, 2005
Filing Date:
July 28, 2004
Export Citation:
Assignee:
NIPPON PISTON RING CO LTD (JP)
TAKAMURA HIROYUKI (JP)
TAKEGUCHI SHUNSUKE (JP)
TAKAMURA HIROYUKI (JP)
TAKEGUCHI SHUNSUKE (JP)
International Classes:
F01L1/04; F01L1/047; F16H53/02; (IPC1-7): C22C38/00; C22C38/08; C22C38/12; F01L1/04; F01L1/18; F16H53/02
Foreign References:
| JPH0931612A | 1997-02-04 | |||
| JPS55145151A | 1980-11-12 | |||
| JPH1150210A | 1999-02-23 | |||
| JP3257196B2 | 2002-02-18 | |||
| JPH0417645A | 1992-01-22 |
Attorney, Agent or Firm:
Ishikawa, Yasuo (17-11 Shiba 2-chome, Minato-k, Tokyo 14, JP)
Download PDF: