Title:
COMPOSITE WORK ROLL FOR COLD ROLLING MADE BY CENTRIFUGAL CASTING
Document Type and Number:
Japanese Patent JP3729178
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a composite work roll for cold rolling of high quality made by centrifugal casting which is produced at lower cost than that of a quenched work roll made of 10% Cr based or semi-high speed steel based forged steel obtained by using an electroslag melting method, and has wear resistance and grindability equal to or above those of the same.
SOLUTION: The composite work roll for cold rolling is made by centrifugal casting centrifugal casting machine with a rotating shaft having a tilt angle of ≤30 degrees, and consists of an external layer and a core materials made of spheroidal graphite cast iron. The external layer is made of an iron based high alloy satisfying 0.50 to 0.95% C, 0.2 to 2.0% Si, 0.2 to 2.0% Mn, 0.1 to 2.0% Ni, 4.5 to 8.5% Cr, 1.5 to 4.5% Mo, 0.1 to 1.0% V and 0.1 to 3.0% W. The content of (Cr+2V) in the spheroidal graphite cast iron composing both the shaft parts of the roll is ≤0.70%. Further, the surface of the external layer is hardened so as to be a Shore hardness of ≥90 by stationary induction quenching.
Inventors:
Toshihiro Kudo
Jimbo Yasuhiro
Kiyoshi Oya
Jimbo Yasuhiro
Kiyoshi Oya
Application Number:
JP2003013830A
Publication Date:
December 21, 2005
Filing Date:
January 22, 2003
Export Citation:
Assignee:
Kantoku Co., Ltd.
International Classes:
B21B27/00; B22D13/02; C22C37/00; C22C37/04; C22C38/00; C22C38/58; (IPC1-7): B21B27/00; B22D13/02; C22C37/04; C22C38/00; C22C38/58
Domestic Patent References:
| JP4247847A | ||||
| JP9143548A | ||||
| JP7001013A | ||||
| JP2000190009A | ||||
| JP2004225097A |
Attorney, Agent or Firm:
Shoichi Hirose
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