Title:
METHOD FOR PRODUCING THIN STEEL SHEET SUPERIOR IN COLD AGING RESISTANCE, WORKABILITY, AND HARDENABILITY BY COATING/BAKING
Document Type and Number:
Japanese Patent JP3855678
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for stably producing BH steel sheet having good workability and less aging deterioration at normal temperature.
SOLUTION: The BH steel sheet is produced by hot rolling and cold rolling a steel piece including 0.0005-0.05% C, below 0.2% Si, 0.01-1.5% Mn, below 0.15% P, below 0.025% S, below 0.5% Al, below 0.05% N, and further below 0.01% B as needed, and then quenching the obtained cold rolled steel sheet having the pre-quenching temperature (Ts) of 60-250°C at the temperature (Tq) of below 150°C (provided that Ts>Tq).
Inventors:
Shigeki Nomura
Hiroyuki Nakagawa
Hiroyuki Nakagawa
Application Number:
JP2001132426A
Publication Date:
December 13, 2006
Filing Date:
April 27, 2001
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B21B1/22; C21D9/46; B21B3/00; C22C38/00; C22C38/06; C22C38/14; C23C2/06; C23C2/26; (IPC1-7): C21D9/46; B21B1/22; B21B3/00; C23C2/06; C23C2/26; //C22C38/00; C22C38/06; C22C38/14
Domestic Patent References:
| JP8188832A | ||||
| JP60077934A | ||||
| JP3002329A | ||||
| JP55091930A | ||||
| JP3111547A | ||||
| JP7057903B2 |
Attorney, Agent or Firm:
Shoichi Hirose