ROLLED MATERIAL FOR FRACTURE SPLIT CONNECTING ROD EXCELLING IN FRACTURE SPLITTABILITY, HOT FORGED PART FOR FRACTURE SPLIT CONNECTING ROD EXCELLING IN FRACTURE SPLITTABILITY, AND FRACTURE SPLIT CONNECTING ROD

Title:

Document Type and Number:

WIPO Patent Application WO/2007/108365

Kind Code:

A1

Abstract:

A rolled material excelling in fracture splittability that is suitable for manufacturing of a connecting rod having its through-hole portion for assembly in crank shaft fracture split into roughly a semicircle. There is provided a rolled material satisfying a specified component requirement, exhibiting an average aspect ratio of sulfide inclusion, determined upon observation of D/4 portion (D: diameter of rolled material) in a section parallel to the longitudinal direction of rodlike rolled material, of 10.0 or below, exhibiting a value of Pc according to the following formula (1) of 0.41 to 0.75 and exhibiting a value of Veq according to the following formula (2) of 0.18 mass% or greater. Pc = C/(1-α/100) (1) {wherein C is the carbon content (mass%) of steel, and α is the ferrite fraction (area%)}, and Veq = V+Ti/2+Si/20 (2) {wherein V, Ti and Si are the contents (mass%) of relevant elements in steel}.

Inventors:

ANAN GORO
SHIIHASHI KEITA

Application Number:

PCT/JP2007/054937

Publication Date:

September 27, 2007

Filing Date:

March 13, 2007

Export Citation:

Click for automatic bibliography generation Help

Assignee:

KOBE STEEL LTD (JP)
ANAN GORO
SHIIHASHI KEITA

International Classes:

C22C38/00; B21K1/14; C21D8/00; C22C38/60

Foreign References:

JP2000073141A	2000-03-07
JP2003119545A	2003-04-23
JPH1143738A	1999-02-16
JP2003342671A	2003-12-03
JP2002356743A	2002-12-13
JP2004035916A	2004-02-05
JP2004277817A	2004-10-07
JP2002275578A	2002-09-25
JP2004277848A	2004-10-07
JP2003193184A	2003-07-09
JP2000073141A	2000-03-07

Other References: