JPS55125235A - Production of alloyed zinc hot dipped high tensile steel plate of superior workability - Google Patents
Production of alloyed zinc hot dipped high tensile steel plate of superior workabilityInfo
- Publication number
- JPS55125235A JPS55125235A JP3155079A JP3155079A JPS55125235A JP S55125235 A JPS55125235 A JP S55125235A JP 3155079 A JP3155079 A JP 3155079A JP 3155079 A JP3155079 A JP 3155079A JP S55125235 A JPS55125235 A JP S55125235A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- temperature
- rate
- high tensile
- cooling
- 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)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE:To produce the high tensile steel plate of superior workability which has alloyed zinc plated layer on a two-phase structure steel plate by performing heat treatment at the specific temperature and rate of cooling in the two processes of zinc hot dipping the steel sheet and alloying this. CONSTITUTION:A steel sheet containing C; 0.005-0.15%, Mn; 0.3-2.0%, Mo; 0.05-0.5% is heated to the (alpha+gamma) 2-phase co-existence region temperature between the Ac1-Ac3 transformation points and is held for 30sec. Next, it is cooled down to 450-550 deg.C at a rate of cooling of more than the critical cooling rate CR deg.C/ sec shown by the formula, and is subjected to zinc hot dipping treatment at this temperature. Further, it is heated to the temperature between 500 deg.C to Ac1 transformation point to alloy the zinc to the steel plate. Following to this, it is cooled down to the temperature of 300 deg.C or less at above the rate of cooling of said critical cooling rate CR deg.C/sec. Or further, if necessary, it is subjected to over-aging treatment for a short time at 300 deg.C or less for the purpose of material adjustment. The high tensile steel plate which has the 2-phase mixed structures of ferrite and martensite, is provided with the alloyed zinc plated layer and has superior workability is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3155079A JPS6049698B2 (en) | 1979-03-16 | 1979-03-16 | Manufacturing method of alloyed hot-dip galvanized high-strength steel sheet with excellent workability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3155079A JPS6049698B2 (en) | 1979-03-16 | 1979-03-16 | Manufacturing method of alloyed hot-dip galvanized high-strength steel sheet with excellent workability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55125235A true JPS55125235A (en) | 1980-09-26 |
| JPS6049698B2 JPS6049698B2 (en) | 1985-11-05 |
Family
ID=12334289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3155079A Expired JPS6049698B2 (en) | 1979-03-16 | 1979-03-16 | Manufacturing method of alloyed hot-dip galvanized high-strength steel sheet with excellent workability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6049698B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5770269A (en) * | 1980-10-20 | 1982-04-30 | Sumitomo Metal Ind Ltd | Preparation of alloying treated galvanized sheet iron |
| JPS57140868A (en) * | 1981-02-24 | 1982-08-31 | Nisshin Steel Co Ltd | Aluminum hot-dipped steel plate with superior strength and oxidation resistance at high temperature and its manufacture |
| JPS57181370A (en) * | 1981-04-30 | 1982-11-08 | Nippon Steel Corp | Production of alloyed zinc plated steel plate of high spattering resistance |
| JPS61284594A (en) * | 1985-06-10 | 1986-12-15 | Nippon Steel Corp | Plated steel sheet having zn-base plating with superior adhesion |
| JPH04254548A (en) * | 1991-02-05 | 1992-09-09 | Nippon Steel Corp | Starting sheet for surface treated steel sheet excellent in plating characteristic and workability |
| US5384206A (en) * | 1991-03-15 | 1995-01-24 | Nippon Steel Corporation | High-strength cold-rolled steel strip and molten zinc-plated high-strength cold-rolled steel strip having good formability and method of producing such strips |
| EP1443124A1 (en) * | 2000-01-24 | 2004-08-04 | JFE Steel Corporation | Hot-dip galvanized steel sheet and method for producing the same |
| JP2005538248A (en) * | 2002-09-06 | 2005-12-15 | ユジノール | Ultra high mechanical strength steel material and method for producing the sheet coated with zinc or zinc alloy |
-
1979
- 1979-03-16 JP JP3155079A patent/JPS6049698B2/en not_active Expired
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5770269A (en) * | 1980-10-20 | 1982-04-30 | Sumitomo Metal Ind Ltd | Preparation of alloying treated galvanized sheet iron |
| JPS57140868A (en) * | 1981-02-24 | 1982-08-31 | Nisshin Steel Co Ltd | Aluminum hot-dipped steel plate with superior strength and oxidation resistance at high temperature and its manufacture |
| JPH026812B2 (en) * | 1981-02-24 | 1990-02-14 | Nisshin Steel Co Ltd | |
| JPS57181370A (en) * | 1981-04-30 | 1982-11-08 | Nippon Steel Corp | Production of alloyed zinc plated steel plate of high spattering resistance |
| JPH0124861B2 (en) * | 1981-04-30 | 1989-05-15 | Nippon Steel Corp | |
| JPS61284594A (en) * | 1985-06-10 | 1986-12-15 | Nippon Steel Corp | Plated steel sheet having zn-base plating with superior adhesion |
| JPH0243834B2 (en) * | 1985-06-10 | 1990-10-01 | Nippon Steel Corp | |
| JPH04254548A (en) * | 1991-02-05 | 1992-09-09 | Nippon Steel Corp | Starting sheet for surface treated steel sheet excellent in plating characteristic and workability |
| US5384206A (en) * | 1991-03-15 | 1995-01-24 | Nippon Steel Corporation | High-strength cold-rolled steel strip and molten zinc-plated high-strength cold-rolled steel strip having good formability and method of producing such strips |
| EP1443124A1 (en) * | 2000-01-24 | 2004-08-04 | JFE Steel Corporation | Hot-dip galvanized steel sheet and method for producing the same |
| JP2005538248A (en) * | 2002-09-06 | 2005-12-15 | ユジノール | Ultra high mechanical strength steel material and method for producing the sheet coated with zinc or zinc alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6049698B2 (en) | 1985-11-05 |
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