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Title:
ROLL OUTER LAYER MATERIAL FOR ROLLING, AND COMPOSITE ROLL FOR ROLLING
Document Type and Number:
WIPO Patent Application WO/2018/043534
Kind Code:
A1
Abstract:
Provided are a roll outer layer material and a composite roll for rolling that have remarkably improved abrasion resistance. A roll outer layer material that has a W-Co-based alloy composition: that is a graded composition in which W content decreases in the radial direction from an outer circumferential side toward an inner circumferential side; and that, at an outer layer material surface that is located at a maximum diameter during rolling, contains, by mass%, 25%-70% of W, 5%-45% of Co, 0.6%-3.5% of C, 0.05%-3% of Si, 0.05%-3% of Mn, and 1%-15% of Mo, the remainder being unavoidable impurities. The roll outer layer material is preferably produced by centrifugal casting.

Inventors:
ICHINO KENJI (JP)
SUZUKI TAKESHI (JP)
IWATA NAOMICHI (JP)
MOCHIDA TETSUO (JP)
ISHIDA KIYOHITO (JP)
OHNUMA IKUO (JP)
Application Number:
PCT/JP2017/031081
Publication Date:
March 08, 2018
Filing Date:
August 30, 2017
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
B21B27/00; B22D13/02; C22C27/04; C22C30/00; C22F1/00; C22F1/18
Domestic Patent References:
WO2006030795A12006-03-23
Foreign References:
JPS60177945A1985-09-11
JPS6160858A1986-03-28
JPS61182862A1986-08-15
JPS4869719A1973-09-21
JPH04141553A1992-05-15
JPH04365836A1992-12-17
JPH051350A1993-01-08
JPH0860289A1996-03-05
JPS576502B21982-02-05
JPS5839906B21983-09-02
JP2004243341A2004-09-02
JP2006175456A2006-07-06
JP2004268140A2004-09-30
Other References:
KAMATA ET AL., HITACHI HYORON (HITACHI REVIEW, vol. 72, no. 5, 1990, pages 69
HASHIMOTO, SEITETSU KENKYU (IRON-MAKING RESEARCH, vol. 338, 1990, pages 62
KAIZO MONMA: "Iron and steel materials, Revised edition", JIKKYO SHUPPAN, 1981, pages 368
MATSUNAGA ET AL., ANALYTICAL TECHNIQUE FOR INCREASING SERVICE LIFE OF ROLLS, 1999, pages 11
HASHIMOTO ET AL., SHINNITTETSU GIHO (NIPPON STEEL TECHNICAL REPORT, vol. 355, no. 1995, pages 76
See also references of EP 3488942A4
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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