Title:
CAST IRON CYLINDRICAL MEMBER AND COMPOSITE STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2019/097678
Kind Code:
A1
Abstract:
The purpose of the present invention is to achieve sufficient bonding strength and adhesion to an outer circumferential-side member even with a lower projection height. Provided is a composite structure comprising a cast iron cylindrical member, the outer circumferential surface of which consists of a cast surface and has a plurality of protrusions P integrally formed with the cast surface, wherein A) the heights H of the protrusions P are at least 0.20 mm and less than 0.50 mm, B) the number N of protrusions per 1 cm2 of the circumferential surface is 61-180, C) the protrusions P include constricted protrusions Pn, D) the percentage of the constricted protrusions Pn among the protrusions P is at least 50%, E) the bonding strength index S represented by equation 1 below is at least 310, and F) the bonding strength F(Al) when the outer circumferential surface of the cast iron cylindrical member is insert-cast with an aluminum alloy exceeds the boundary bond strength represented by equation 2 below. (1) S=H2×N×NP, (2) Fb=1.325×H2×N-0.75.
Inventors:
SAYAMA AKIRA (JP)
HATAKEYAMA KOICHI (JP)
SATO AKIRA (JP)
SEINO KAZUKI (JP)
OKUDA KATSUYA (JP)
TAKIGUCHI TOMOKI (JP)
HATAKEYAMA KOICHI (JP)
SATO AKIRA (JP)
SEINO KAZUKI (JP)
OKUDA KATSUYA (JP)
TAKIGUCHI TOMOKI (JP)
Application Number:
PCT/JP2017/041498
Publication Date:
May 23, 2019
Filing Date:
November 17, 2017
Export Citation:
Assignee:
TPR CO LTD (JP)
TPR IND CO LTD (JP)
TPR IND CO LTD (JP)
International Classes:
B22D19/00; B22D19/08; F02F1/00; F16D51/16
Foreign References:
JP2009264347A | 2009-11-12 | |||
JP2005194983A | 2005-07-21 | |||
JP2003326353A | 2003-11-18 | |||
JP4429025B2 | 2010-03-10 | |||
JP4210468B2 | 2009-01-21 | |||
JP2009264347A | 2009-11-12 |
Other References:
See also references of EP 3505271A4
Attorney, Agent or Firm:
IAT WORLD PATENT LAW FIRM (JP)
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