CAST IRON CYLINDRICAL MEMBER AND COMPOSITE STRUCTURE

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)

Application Number:

PCT/JP2017/041498

Publication Date:

May 23, 2019

Filing Date:

November 17, 2017

Export Citation:

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Assignee:

TPR 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: