JPS5651531A - Production of zinc hot dipped steel plate of superior drawability - Google Patents
Production of zinc hot dipped steel plate of superior drawabilityInfo
- Publication number
- JPS5651531A JPS5651531A JP12583679A JP12583679A JPS5651531A JP S5651531 A JPS5651531 A JP S5651531A JP 12583679 A JP12583679 A JP 12583679A JP 12583679 A JP12583679 A JP 12583679A JP S5651531 A JPS5651531 A JP S5651531A
- Authority
- JP
- Japan
- Prior art keywords
- aging treatment
- over
- over aging
- temperature
- steel plate
- 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
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)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE:To produce a Zn hot dipped steel plate of superior drawability by heating a cold rolled low carbon steel strip to above its recrystallization temperature, and soaking the same at this temperature then quickly cooling the same at the specific cooling rates and Zn hot dipping the strip before or after the over-aging treatment. CONSTITUTION:A cold rolled steel strip of low carbon steel is annealed by being heated to above its recrystallization temperature and is soaked at this temprature, after which it is quenched down to 300-500 deg.C temperatures at cooling rates of >=70 deg.C/sec. with water-cooled type rotators. The solid solubilized carbon amount before over aging treatment is increased by this quick cooling. It is then subjected to over aging treatment by being held for more than 10sec within a 300-500 deg.C temperature range to accelerate the deposition of solid solubilized carbon and obtain over aging treatment effect within a short time. Zinc hot dipping is performed before or after the over aging treatment. In the case of galvanizing before the over aging treatment, the over aging treatment temperature is made 300-400 deg.C, and in the case of performing the galvanizing after the over aging treatment, the over aging treatment temperature is made 460-500 deg.C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12583679A JPS5651531A (en) | 1979-09-29 | 1979-09-29 | Production of zinc hot dipped steel plate of superior drawability |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12583679A JPS5651531A (en) | 1979-09-29 | 1979-09-29 | Production of zinc hot dipped steel plate of superior drawability |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5651531A true JPS5651531A (en) | 1981-05-09 |
Family
ID=14920134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12583679A Pending JPS5651531A (en) | 1979-09-29 | 1979-09-29 | Production of zinc hot dipped steel plate of superior drawability |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5651531A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5074924A (en) * | 1989-06-21 | 1991-12-24 | Nippon Steel Corporation | Process for producing galvanized, non-aging cold rolled steel sheets having good formability in a continuous galvanizing line |
-
1979
- 1979-09-29 JP JP12583679A patent/JPS5651531A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5074924A (en) * | 1989-06-21 | 1991-12-24 | Nippon Steel Corporation | Process for producing galvanized, non-aging cold rolled steel sheets having good formability in a continuous galvanizing line |
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