Title:
熱延鋼材の製造方法
Document Type and Number:
Japanese Patent JP7205278
Kind Code:
B2
Abstract:
To provide a hot-rolled steel material manufacturing method by which occurrence of a burn mark can be prevented more reliably, and an inspection method.SOLUTION: There is provided a method for manufacturing a hot-rolled steel material in such a manner that a steel material is caused to pass a heating furnace 10 having heating zones 11, 12, 13 and a soaking zone 14 subsequent to the heating zones, a rough rolling mill 20, a descaling device 30, and a finish rolling mill 40 in this order. According to this method, whether a burn mark occurs or not is inspected in a relationship between a maturity which is an integrated value (time integration) of a steel material temperature from heating furnace charging to extraction and a temperature in the rough rolling mill 20, as a heating index, a region in which the burn mark does not occur and a region in which the burn mark occurs are detected, and a steel material is manufactured under the condition of the region where the burn mark does not occur in the heating index.SELECTED DRAWING: Figure 1
Inventors:
Yuta Haruna
Fujiwara Masaru
Fujiwara Masaru
Application Number:
JP2019025227A
Publication Date:
January 17, 2023
Filing Date:
February 15, 2019
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B21B38/00; B21B1/00; B21B45/00; B21C51/00
Domestic Patent References:
| JP2010265537A | ||||
| JP54074231A | ||||
| JP60211014A | ||||
| JP9314204A | ||||
| JP11156421A | ||||
| JP61025772B2 |
Attorney, Agent or Firm:
Munenori Yamahiro
Makiko Iwamoto
Makiko Iwamoto
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