Title:
CONNECTING ROD HAVING HIGH FATIGUE STRENGTH AND EXCELLENT TOUGHNESS AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JP3303030
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a connecting rod having a high fatigue strength and an excellent toughness.
SOLUTION: A connecting rod is made of iron base sintered alloyal having a composition of 0.2 to 5 wt.% of Cr, 1 to 6 wt.% of Ni 0.1 to 1.0 wt.% of C and the remainder of Fe and inevitable impurities, and a structure in which a ferrite phase is island-likely dispersed in a base material composed of a mixed structure composed of a martensite, austenite and perlite. Further, the density of the surface part thereof is in a range from 7.6 to 7.9 g/cc at a depth of 30 to 200 μm measured from the outer surface thereof, and the density of a part inside of the surface part is in a range of 7.4 f/cc.
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Inventors:
Kinya Kawase
Koichiro Morimoto
Koichiro Morimoto
Application Number:
JP12674798A
Publication Date:
July 15, 2002
Filing Date:
April 21, 1998
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
F16C7/02; B22F5/00; C21D7/06; C22C33/02; C22C38/00; C22C38/40; (IPC1-7): F16C7/02; B22F5/00; C21D7/06; C22C33/02; C22C38/00; C22C38/40
Domestic Patent References:
| JP874008A | ||||
| JP762444A | ||||
| JP949063A |
Attorney, Agent or Firm:
Kazuo Tomita (1 person outside)