Title:
遠心鋳造製圧延用複合ロール及びその製造方法
Document Type and Number:
Japanese Patent JP7092943
Kind Code:
B2
Abstract:
There is provided a centrifugally cast composite roll for rolling having excellent wear resistance and surface deterioration resistance at levels of a high-speed steel cast iron roll and having rolling incident resistance at a level of a high alloy grain cast iron roll. A centrifugally cast composite roll for rolling having an outer layer and an inner layer, the outer layer including chemical components by mass ratio:C: 1.0 to 3.0%;Si: 0.3 to 3.0%;Mn: 0.1 to 3.0%;Ni: 0.1 to 6.0%;Cr: 0.5 to 6.0%;Mo: 0.5 to 6.0%;V: 3.0 to 7.0%;Nb: 0.1 to 3.0%;B: 0.001 to 0.1%;N: 0.005 to 0.070%; andthe balance being Fe and inevitable impurities, wherein: the chemical composition of the outer layer satisfies following Formula (1), has a crystallization and precipitation amount of graphite suppressed to less than 0.3% by area ratio, and has 1 to 15% of MC carbide by area ratio; and the centrifugally cast composite roll for rolling does not have a cast defect having a diameter of ϕ4 mm or more at a boundary between the outer layer and the inner layer,50×N+V<9.0 (1).
Inventors:
Kazunori Uemiyata
Shinya Ishikawa
Ayaka Yanagizuru
Shinya Ishikawa
Ayaka Yanagizuru
Application Number:
JP2021511876A
Publication Date:
June 28, 2022
Filing Date:
March 25, 2020
Export Citation:
Assignee:
Nittetsu Rolls Co., Ltd.
International Classes:
B21B27/00; B22D13/02; B22D19/16; C22C37/00; C22C38/00; C22C38/58; C22C38/60
Domestic Patent References:
| JP2012117083A | ||||
| JP2001321807A |
Foreign References:
| WO2015045720A1 | ||||
| WO2018147370A1 | ||||
| WO2019045068A1 |
Attorney, Agent or Firm:
Koji Hagiwara
Kanemoto Tetsuo
Naoki Ogita
Takashi Saito
Takuya Mine
Kanemoto Tetsuo
Naoki Ogita
Takashi Saito
Takuya Mine