Title:
圧延用複合ロール及びその製造方法
Document Type and Number:
Japanese Patent JP6977738
Kind Code:
B2
Abstract:
A composite roll for rolling comprising an outer layer and an inner layer integrally fused to each other; the outer layer being made of an Fe-based alloy comprising by mass 1-3% of C, 0.3-3% of Si, 0.1-3% of Mn, 0.1-5% of Ni, 1-7% of Cr, 1-8% of Mo, 4-7% of V, 0.005-0.15% of N, and 0.05-0.2% of B; the inner layer being made of graphite cast iron comprising by mass 2.4-3.6% of C, 1.5-3.5% of Si, 0.1-2% of Mn, 0.1-2% of Ni, less than 0.7% of Cr, less than 0.7% of Mo, 0.05-1% of V, and 0.01-0.1% of Mg; the inner layer comprising a core portion fused to the outer layer, and shaft portions integrally extending from both ends of the core portion; at least one of the shaft portions containing 200/cm2or more of hard MC carbides having circle-equivalent diameters of 5 µm or more.
Inventors:
Yasunori Nozaki
Nozomi Oda
Toshiyuki Hattori
Nozomi Oda
Toshiyuki Hattori
Application Number:
JP2018567487A
Publication Date:
December 08, 2021
Filing Date:
February 08, 2018
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
B21B27/00; B22D13/02; B22D19/16; C22C37/00; C22C38/00; C22C38/58; C22C38/60
Domestic Patent References:
| JP201562936A | ||||
| JP2012213780A | ||||
| JP60124407A | ||||
| JP2015193014A | ||||
| JP2015205342A | ||||
| JP5179391A |
Foreign References:
| WO2015045984A1 | ||||
| WO2015045720A1 | ||||
| WO2015045985A1 | ||||
| WO2013150950A1 |
Attorney, Agent or Firm:
Takaishi Tachibana
Kenji Takaishi
Kenji Takaishi