Title:
HIGH FORMABILITY HIGH TENSILE HOT ROLLED STEEL SHEET HAVING EXCELLENT MATERIAL UNIFORMITY, PRODUCTION METHOD THEREFOR AND WORKING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP3888128
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide high tensile hot rolled steel sheet having an industrially practicable high formability and excellent material uniformity, in which the fluctuation of the material in a coil, particularly, the fluctuation of the material in the width direction is minimized, a production method therefor, and a working method therefor.
SOLUTION: The steel sheet substantially has a composition containing, by weight, ≤0.1% C, 0.05 to 0.6% Mo and 0.02 to 0.10% Ti. The steel sheet substantially has a ferritic structure in which carbides containing Ti and Mo in the range satisfying, by atomic ratio, Ti/Mo≥0.1 are dispersedly precipitated.
Inventors:
Yoshimasa Funagawa
Takeshi Shiozaki
Tetsuo Yamamoto
Eiji Maeda
Dr. Nakata
Kunikazu Tomita
Takanobu Saito
Keishi Yamashita
Hiroshi Masumoto
Takeshi Shiozaki
Tetsuo Yamamoto
Eiji Maeda
Dr. Nakata
Kunikazu Tomita
Takanobu Saito
Keishi Yamashita
Hiroshi Masumoto
Application Number:
JP2001333376A
Publication Date:
February 28, 2007
Filing Date:
October 30, 2001
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B21B3/00; C22C38/00; B21D22/02; B21D53/88; C21D9/46; C22C38/14; C22C38/38; (IPC1-7): C22C38/00; B21B3/00; B21D22/02; B21D53/88; C21D9/46; C22C38/14; C22C38/38
Domestic Patent References:
| JP8067945A | ||||
| JP2003096535A | ||||
| JP2002105540A | ||||
| JP2000160291A | ||||
| JP8085842A | ||||
| JP6200351A | ||||
| JP5295485A | ||||
| JP2001200339A | ||||
| JP2002161340A | ||||
| JP7315025A |
Attorney, Agent or Firm:
Hiroshi Takayama