JPS6428325A - Production of high-strength cold rolled steel sheet for ultra-deep drawing - Google Patents
Production of high-strength cold rolled steel sheet for ultra-deep drawingInfo
- Publication number
- JPS6428325A JPS6428325A JP18509187A JP18509187A JPS6428325A JP S6428325 A JPS6428325 A JP S6428325A JP 18509187 A JP18509187 A JP 18509187A JP 18509187 A JP18509187 A JP 18509187A JP S6428325 A JPS6428325 A JP S6428325A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- rolling
- deep drawing
- cold rolled
- ultra
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
PURPOSE:To produce a high-strength cold rolled steel sheet for ultra-deep drawing by subjecting a low-carbon steel slab contg. specifically small ratios of Ti, Nb, B, etc., to rough rolling, then to hot rolling at a specific temp., followed by coiling, and recrystallization annealing and subjecting the steel sheet further to cold rolling and recrystallization annealing. CONSTITUTION:The steel slab contg., by weight, <0.02% C, <1.5% Si, <1.5% Mn, <0.15% P, and <0.1% Al, and 1 or >=2 kinds among <0.003% B, <0.15% Ti, and <0.2% Nb in such a manner that the contents of Ti and Nb satisfy the formula I is first roughly rolled at 900-1,250 deg.C and is worked to a sheet material. The carbonitride of Ti and Nb is precipitated by this rough rolling, by which the total content of the solid soln. carbon and solid soln. nitrogen in the steel is decreased to a trace quantity of <=20ppm. The steel sheet is then subjected to rolling at <=60% rolling reduction in ferrite region at 800-500 deg.C temp., following which the sheet is coiled and recrystallization-annealed. The steel sheet is in succession subjected to ordinary cold rolling at <=50% draft then to recrystallization annealing. The cold rolled steel sheet which is free from longitudinal cracks after deep drawing by the incorporation of B and has the excellent deep drawability and strength is produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18509187A JPS6428325A (en) | 1987-07-24 | 1987-07-24 | Production of high-strength cold rolled steel sheet for ultra-deep drawing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18509187A JPS6428325A (en) | 1987-07-24 | 1987-07-24 | Production of high-strength cold rolled steel sheet for ultra-deep drawing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6428325A true JPS6428325A (en) | 1989-01-30 |
Family
ID=16164682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18509187A Pending JPS6428325A (en) | 1987-07-24 | 1987-07-24 | Production of high-strength cold rolled steel sheet for ultra-deep drawing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6428325A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6462440A (en) * | 1987-08-31 | 1989-03-08 | Sumitomo Metal Ind | Cold rolled high-tensile steel sheet having superior workability and its production |
| JPH02173242A (en) * | 1988-12-26 | 1990-07-04 | Kawasaki Steel Corp | High tensile cold rolled steel sheet for working and its production |
| JPH03150316A (en) * | 1989-11-07 | 1991-06-26 | Kawasaki Steel Corp | Production of cold rolled steel sheet for deep drawing |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62139823A (en) * | 1985-12-13 | 1987-06-23 | Sumitomo Metal Ind Ltd | Production of cold rolled steel sheet for deep drawing |
-
1987
- 1987-07-24 JP JP18509187A patent/JPS6428325A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62139823A (en) * | 1985-12-13 | 1987-06-23 | Sumitomo Metal Ind Ltd | Production of cold rolled steel sheet for deep drawing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6462440A (en) * | 1987-08-31 | 1989-03-08 | Sumitomo Metal Ind | Cold rolled high-tensile steel sheet having superior workability and its production |
| JPH02173242A (en) * | 1988-12-26 | 1990-07-04 | Kawasaki Steel Corp | High tensile cold rolled steel sheet for working and its production |
| JPH03150316A (en) * | 1989-11-07 | 1991-06-26 | Kawasaki Steel Corp | Production of cold rolled steel sheet for deep drawing |
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