Title:
TEMPER ROLLING METHOD OF STEEL SHEET
Document Type and Number:
Japanese Patent JP3783439
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the glossiness of a steel sheet by rolling a steel sheet containing C of not more than a specified rate with a rolling mill having plural stands in which at least the rolling rolls in the front stage are scratch bright rolls having a specified roughness and the rolling rolls in the rearmost stage are bright rolls having a specified roughness.
SOLUTION: A steel sheet whose C content is :≤0.012 wt.% is used for that steel sheet. Furthermore, it is preferable to contain 0.005-0.2 wt.% Ti, 0.002-0.1 wt.% Nb and ≤0.15 wt.% Al. At least the rolling rolls in the front stage are taken as the scratch bright roll whose roughness Ra is :≤12 μm and at least the rolling rolls in the rearmost stage as the bright roll whose roughness Ra is ≤0.5 μm. The bright rolls having a roll roughness within the range which is divided with the roll roughnesses in the front stage and rearmost stage are suitable to the rolls used at stands other than the front stage and rearmost stage. It is preferable that the temper rolling is executed by dry rolling, its elongation percentage is 1.5±1% and its target hardness is 50-60 by HR30T.
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Inventors:
Teruhiro Saito
Hidenori Miyake
Goro Kawaguchi
Makoto Kobayashi
Naoya Sato
Hidenori Miyake
Goro Kawaguchi
Makoto Kobayashi
Naoya Sato
Application Number:
JP37029898A
Publication Date:
June 07, 2006
Filing Date:
December 25, 1998
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B21B1/22; B21B39/00; B21B27/00; C22C38/00; (IPC1-7): B21B1/22; B21B27/00; //C22C38/00
Domestic Patent References:
| JP8215709A | ||||
| JP63111156A | ||||
| JP63121636A | ||||
| JP5277533A | ||||
| JP4089106A | ||||
| JP62028008A |
Attorney, Agent or Firm:
Eiichi Kobayashi