JPS5732329A - Production of high tensile cold rolld steel plate of exceelent deep drawability - Google Patents
Production of high tensile cold rolld steel plate of exceelent deep drawabilityInfo
- Publication number
- JPS5732329A JPS5732329A JP10717880A JP10717880A JPS5732329A JP S5732329 A JPS5732329 A JP S5732329A JP 10717880 A JP10717880 A JP 10717880A JP 10717880 A JP10717880 A JP 10717880A JP S5732329 A JPS5732329 A JP S5732329A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- upper limit
- high tensile
- steel
- deep drawability
- 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
- C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
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 make drawability and ductility much better than those of conventional products and further obtain a high tensile cold rolled steel plate of excellent deep drawability at a low yield point by adding proper smounts of P, Si and Mn to Nb- contg. extra low carbon Al killed steel. CONSTITUTION:A steel plate obtained by hot rolling, cold rolling and box annealing of a steel ingot or slab consisting of 0.002-0.015 C by %, <=1.2 Si, 0.05- 0.8Mn, 0.02-0.08 P, <=0.02 S, <=0.01 N, <=0.008 O, <=0.10 acid soluble Al, and >=1.8 times N, 3XC-(8C+0.02) Nb, and the balance Fe and unavoidable impurities. Here, the P is essential for improving strength. Below the lower limit thereof, the strength is low, and above the upper limit, weldability degrades. The Si can be compounded together with the above-described amount of P with 38-45kg/mm. class steel, but if is in excess of the upper limit, the degradation in an (r) value and elongation is considerable. The Mn can also be compounded together with the P as with the Si. Below the lower limit, S fixing is insufficient and brittleness increases. In excess of the upper limit, the (r) value and elongation are considerably reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10717880A JPS5842252B2 (en) | 1980-08-06 | 1980-08-06 | Method for manufacturing high-strength cold-rolled steel sheet with extremely good deep drawability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10717880A JPS5842252B2 (en) | 1980-08-06 | 1980-08-06 | Method for manufacturing high-strength cold-rolled steel sheet with extremely good deep drawability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5732329A true JPS5732329A (en) | 1982-02-22 |
| JPS5842252B2 JPS5842252B2 (en) | 1983-09-19 |
Family
ID=14452439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10717880A Expired JPS5842252B2 (en) | 1980-08-06 | 1980-08-06 | Method for manufacturing high-strength cold-rolled steel sheet with extremely good deep drawability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5842252B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100892261B1 (en) * | 2007-05-17 | 2009-04-09 | 현대하이스코 주식회사 | Proper heat treatment cycle in the BAF for producing cold rolled steel sheet to be deep drawn |
-
1980
- 1980-08-06 JP JP10717880A patent/JPS5842252B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100892261B1 (en) * | 2007-05-17 | 2009-04-09 | 현대하이스코 주식회사 | Proper heat treatment cycle in the BAF for producing cold rolled steel sheet to be deep drawn |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5842252B2 (en) | 1983-09-19 |
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