Title:
熱間圧延機及び熱延鋼板の製造方法
Document Type and Number:
Japanese Patent JP7342831
Kind Code:
B2
Abstract:
To provide a hot rolling mill which can suppress occurrence of roll mark transferred to a surface of a hot rolled steel sheet, with a simple equipment configuration, and a hot rolled steel sheet manufacturing method.SOLUTION: A hot rolling mill 2 hot-rolls a material S to be rolled. The hot rolling mill 2 comprises: rolling stands 21 to 2n equipped with a pair of upper and lower work rolls 3a for rolling the material S to be rolled, a pair of upper and lower back-up rolls 3b for supporting each work roll 3a, and a pair of upper and lower intermediate rolls 3c located between each work roll 3a and each back-up roll 3b. Each intermediate roll 3s is configured to be capable of shifting in an axial direction. A barrel length L3c of each intermediate roll 3c is made longer than a barrel length L3a of each work roll 3a, and a surface hardness of each intermediate roll 3c is made lower than a surface hardness of each work roll 3a by 10HS or more.SELECTED DRAWING: Figure 2
Inventors:
Takahiro Sakai
Akio Sato
Seiji Miyamoto
Jun Isoyama
Akio Sato
Seiji Miyamoto
Jun Isoyama
Application Number:
JP2020164012A
Publication Date:
September 12, 2023
Filing Date:
September 29, 2020
Export Citation:
Assignee:
JFE Steel Corporation
International Classes:
B21B13/14; B21B27/00; B21B27/02; B21B31/18
Domestic Patent References:
| JP7155814A | ||||
| JP6093373A | ||||
| JP5050110A | ||||
| JP5245506A | ||||
| JP54029129U | ||||
| JP5154509A | ||||
| JP5154508A | ||||
| JP53108852A | ||||
| JP11267711A | ||||
| JP2009113088A | ||||
| JP55022421A |
Attorney, Agent or Firm:
田中 秀▲てつ▼
Hajime Hirose
Toru Miyasaka
Tetsuya Mori
Hajime Hirose
Toru Miyasaka
Tetsuya Mori