Title:
COLD ROLLING METHOD AND METHOD FOR PRODUCING COLD-ROLLED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2022/123911
Kind Code:
A1
Abstract:
The present invention provides a cold rolling method in which it is possible to prevent the occurrence of wrinkles during cold rolling without requiring modification of a rolling mill. Provided is a cold rolling method for rolling a steel sheet through a plurality of rolling passes using a cold rolling mill, wherein if the steel sheet unit tension N1 during steady rolling exceeds a standard unit tension N0 calculated according to formula (1) in a specific rolling pass in which the target sheet thickness t0 on the rolling pass exit side is equal to or less than a standard sheet thickness, the steel sheet unit tension N2 in the initial stage of rolling on the entry side of the specific rolling pass is controlled to be less than the standard unit tension N0 and also less than the steel sheet unit tension N1 during steady rolling. Formula (1): N0=(150/9)t0+27.1
Inventors:
TSUKAMOTO KENGO (JP)
SUZUKI KENJI (JP)
SUZUKI KENJI (JP)
Application Number:
PCT/JP2021/038312
Publication Date:
June 16, 2022
Filing Date:
October 15, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21B1/22; B21B37/48
Foreign References:
| JPH04294813A | 1992-10-19 | |||
| JP2019141874A | 2019-08-29 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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