COMPOUND ROLL FOR ROLLING AND METHOD FOR PRODUCING SAME

Title:

COMPOUND ROLL FOR ROLLING AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2018/147367

Kind Code:

A1

Abstract:

A compound roll for rolling which: has a welded and integrated outer layer and inner layer; is configured in a manner such that the outer layer thereof comprises an Fe-based alloy containing, by mass, 1-3% C, 0.3-3% Si, 0.1-3% Mn, 0.1-5% Ni, 1-7% Cr, 1-8% Mo, 4-7% V, 0.005-0.15% N, and 0.05-0.2% B; is configured in a manner such that the inner layer thereof comprises a graphitic cast iron containing, by mass, 2.4-3.6% C, 1.5-3.5% Si, 0.1-2% Mn, 0.1-2% Ni, less than 0.7% Cr, less than 0.7% Mo, 0.05-1% V, and 0.01-0.1% Mg; has a body core section where the inner layer is welded to the outer layer, and has shaft parts that integrally extend from both ends of the body core section, wherein at least one of the shaft parts contains hard MC carbides having an equivalent circle diameter of 5μm or greater in an amount equal to or greater than 200/cm2.

Inventors:

NOZAKI YASUNORI (JP)
ODA NOZOMU (JP)
HATTORI TOSHIYUKI (JP)

Application Number:

PCT/JP2018/004390

Publication Date:

August 16, 2018

Filing Date:

February 08, 2018

Export Citation:

Click for automatic bibliography generation Help

Assignee:

HITACHI METALS LTD (JP)

International Classes:

B21B27/00; B22D13/02; B22D19/16; C22C37/00

Domestic Patent References:

WO2015045720A1	2015-04-02
WO2015045984A1	2015-04-02
WO2015045720A1	2015-04-02

Foreign References:

JP2015062936A	2015-04-09
JP2012213780A	2012-11-08
JPS60124407A	1985-07-03

Other References: