JPS55141527A - Production of low yield ratio high strength cold-rolled steel plate - Google Patents
Production of low yield ratio high strength cold-rolled steel plateInfo
- Publication number
- JPS55141527A JPS55141527A JP5051379A JP5051379A JPS55141527A JP S55141527 A JPS55141527 A JP S55141527A JP 5051379 A JP5051379 A JP 5051379A JP 5051379 A JP5051379 A JP 5051379A JP S55141527 A JPS55141527 A JP S55141527A
- Authority
- JP
- Japan
- Prior art keywords
- less
- steel plate
- cold
- steel
- yield ratio
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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 Sheet Steel (AREA)
Abstract
PURPOSE:To obtain the captioned cold-rolled steel plate capable of enhancing the safety of automobile and reduce the machine weight, by cold-rolling the steel of specified composition containing C, Mn, etc. in conventional method, and heating and soaking for a specified period of time at a temperature higher than AC1 point, and then continuously annealing as specified. CONSTITUTION:A steel containing C, 0.2% (% mark omitted below) or less; Mn, 0.5-2.5; Cr, 0.05-15 (1<Mn+Cr<3.5); and if necessary, one or more kinds of any of Si, 1 or less; Mo, 1 or less; Nb, 0.1 or less; V, 0.1 or less; or T, 0.1 or less is cold-rolled in an ordinary method, and heated and soaked for 5-300sec at a temperature higher than AC1 point. Then, the steel is quenched from the temperature of 400 deg.C or more, or preferably 400-600 deg.C, and is tempered for 5-300sec at a temperature of 300 deg.C or less. As a result, the captioned steel plate of which strength is 40kg/mm<2> and yield ratio is 60% or less, excelling in cold workability, applicable to automobile steel plate, and satisfying the safety, reduction of weight and dent resistance as well may be obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5051379A JPS5855219B2 (en) | 1979-04-24 | 1979-04-24 | Manufacturing method of low yield ratio high strength cold rolled steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5051379A JPS5855219B2 (en) | 1979-04-24 | 1979-04-24 | Manufacturing method of low yield ratio high strength cold rolled steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55141527A true JPS55141527A (en) | 1980-11-05 |
| JPS5855219B2 JPS5855219B2 (en) | 1983-12-08 |
Family
ID=12861044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5051379A Expired JPS5855219B2 (en) | 1979-04-24 | 1979-04-24 | Manufacturing method of low yield ratio high strength cold rolled steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5855219B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4530606B2 (en) | 2002-06-10 | 2010-08-25 | Ｊｆｅスチール株式会社 | Manufacturing method of ultra-high strength cold-rolled steel sheet with excellent spot weldability |
| WO2003106723A1 (en) | 2002-06-14 | 2003-12-24 | Ｊｆｅスチール株式会社 | High strength cold rolled steel plate and method for production thereof |
-
1979
- 1979-04-24 JP JP5051379A patent/JPS5855219B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5855219B2 (en) | 1983-12-08 |
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