Title:
SLIDING MEMBER
Document Type and Number:
WIPO Patent Application WO/2006/123497
Kind Code:
A1
Abstract:
A cast iron sliding member (200) used for the cylinder inner surfaces of hydraulic devices such as hydraulic pumps and hydraulic motors and engine piston rings. The metallographic structure of the surface portion of the sliding member including its sliding surface (S1) comprises graphite (23), martensite (24) (first martensite) surrounding the outline of the graphite (23) in a bull's-eye state, and ferrite (21) positioned on the outside of the first martensite (24) and normal martensite (25) (second martensite). Thus, since oil sumps can be formed earlier on the sliding surface, the cast iron sliding member having excellent lubricity can be provided.
Inventors:
WAKABAYASHI YUUSUKE (JP)
SAKURAI SHIGEYUKI (JP)
AKITA HIDEKI (JP)
SAKURAI SHIGEYUKI (JP)
AKITA HIDEKI (JP)
Application Number:
PCT/JP2006/308126
Publication Date:
November 23, 2006
Filing Date:
April 18, 2006
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
WAKABAYASHI YUUSUKE (JP)
SAKURAI SHIGEYUKI (JP)
AKITA HIDEKI (JP)
WAKABAYASHI YUUSUKE (JP)
SAKURAI SHIGEYUKI (JP)
AKITA HIDEKI (JP)
International Classes:
C21D5/00; C21D1/09; C21D9/00; C21D9/40; C22C37/00; C22C37/04; F16C33/12
Foreign References:
| JPH01230746A | 1989-09-14 | |||
| JPS63280961A | 1988-11-17 | |||
| JPS61266520A | 1986-11-26 | |||
| JP2001503104A | 2001-03-06 |
Attorney, Agent or Firm:
Kasuga, Yuzuru (4-1 Nihonbashi-honcho 3-chome, Chuo-k, Tokyo 23, JP)
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