JPS57126924A - Production of cold-rolled steel sheet having delayed aging property by continuous annealing - Google Patents
Production of cold-rolled steel sheet having delayed aging property by continuous annealingInfo
- Publication number
- JPS57126924A JPS57126924A JP1231781A JP1231781A JPS57126924A JP S57126924 A JPS57126924 A JP S57126924A JP 1231781 A JP1231781 A JP 1231781A JP 1231781 A JP1231781 A JP 1231781A JP S57126924 A JPS57126924 A JP S57126924A
- Authority
- JP
- Japan
- Prior art keywords
- cold
- steel sheet
- rolled
- aging property
- rolled steel
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE:To enable production of a cold-rolled steel sheet having a delayed aging property, while omitting long-term overaging treatment, by hot-rolling and then cold-rolling a steel containing specified amounts of C and Mn to finely disperse cementite. CONSTITUTION:When a steel having the composition containing 0.06-0.30% C, 0.03-1.50% Mn, C+Mn/30>=0.08%, Si<0.20%, Cr<0.5%, sol. Al<0.2% with the proviso of sol. Al/N>2, and optionally one or two of 0.0005-0.0080% B and 0.0010-0.250% Ti is hot-rolled, the steel is finish-rolled at a temperature higher than 650 deg.C, rapidly cooled and then coiled at 50-400 deg.C, to finely disperse cementite. The hot-rolled steel sheet is then cold-rolled to further finely disperse the cementite. The cold-rolled steel sheet is continuously annealed at a temperature of 640-760 deg.C, relatively lower than that in a conventional manner. Thus, a steel sheet having a delayed aging property and a reduced content of dissolved carbon is obtained without necessity of long-term overaging treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1231781A JPS57126924A (en) | 1981-01-29 | 1981-01-29 | Production of cold-rolled steel sheet having delayed aging property by continuous annealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1231781A JPS57126924A (en) | 1981-01-29 | 1981-01-29 | Production of cold-rolled steel sheet having delayed aging property by continuous annealing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57126924A true JPS57126924A (en) | 1982-08-06 |
| JPS629647B2 JPS629647B2 (en) | 1987-03-02 |
Family
ID=11801930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1231781A Granted JPS57126924A (en) | 1981-01-29 | 1981-01-29 | Production of cold-rolled steel sheet having delayed aging property by continuous annealing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57126924A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61130422A (en) * | 1984-11-29 | 1986-06-18 | Sumitomo Metal Ind Ltd | Production of cold-rolled steel sheet for press working |
| US5656103A (en) * | 1994-04-28 | 1997-08-12 | Illinois Tool Works Inc. | Steel strap and method of making |
| WO2001009396A1 (en) * | 1999-07-31 | 2001-02-08 | Thyssen Krupp Stahl Ag | High resistance steel band or sheet and method for the production thereof |
-
1981
- 1981-01-29 JP JP1231781A patent/JPS57126924A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61130422A (en) * | 1984-11-29 | 1986-06-18 | Sumitomo Metal Ind Ltd | Production of cold-rolled steel sheet for press working |
| US5656103A (en) * | 1994-04-28 | 1997-08-12 | Illinois Tool Works Inc. | Steel strap and method of making |
| WO2001009396A1 (en) * | 1999-07-31 | 2001-02-08 | Thyssen Krupp Stahl Ag | High resistance steel band or sheet and method for the production thereof |
| US6743307B1 (en) | 1999-07-31 | 2004-06-01 | Thyssen Krupp Stahl Ag | High resistance steel band or sheet and method for the production thereof |
| KR100796819B1 (en) * | 1999-07-31 | 2008-01-22 | 티센크루프 스틸 악티엔게젤샤프트 | High strength steel strip or steel sheet and method for the production thereof |
| CZ299072B6 (en) * | 1999-07-31 | 2008-04-16 | Thyssen Krupp Stahl Ag | Steel band or sheet with increased strength and process for producing thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS629647B2 (en) | 1987-03-02 |
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