JPS5594444A - Production of high carbon hot rolled steel plate of high strength and toughness and good workability - Google Patents
Production of high carbon hot rolled steel plate of high strength and toughness and good workabilityInfo
- Publication number
- JPS5594444A JPS5594444A JP38979A JP38979A JPS5594444A JP S5594444 A JPS5594444 A JP S5594444A JP 38979 A JP38979 A JP 38979A JP 38979 A JP38979 A JP 38979A JP S5594444 A JPS5594444 A JP S5594444A
- Authority
- JP
- Japan
- Prior art keywords
- hoop
- steel plate
- surface layer
- hot rolled
- layer part
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract 2
- 239000010959 steel Substances 0.000 title abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title 1
- 229910052799 carbon Inorganic materials 0.000 title 1
- 239000002344 surface layer Substances 0.000 abstract 4
- 229910001563 bainite Inorganic materials 0.000 abstract 3
- 238000005098 hot rolling Methods 0.000 abstract 2
- 229910000677 High-carbon steel Inorganic materials 0.000 abstract 1
- 238000000137 annealing Methods 0.000 abstract 1
- 229910001566 austenite Inorganic materials 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000005262 decarbonization Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 1
- 235000013980 iron oxide Nutrition 0.000 abstract 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
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 produce the high carbon steel plate of superior workability, strength and toughness by annealing the steel plate in the form of the tight coil having been held deposited with surface scale after hot rolling to decarbonize only the surface layer part then further heat treating the same to make the central part into bainite structure. CONSTITUTION:The hot rolled hoop obtainable by hot rolling a slab containing C; 0.4% or more by an ordinary method is annealed in the form of being held deposited with scale at the temperature range of 650 deg.C to A1 point in a non-decarbonizing atmosphere. As a result of this, the various iron oxides in the hot rolled scale of the surface and the C in the surface layer part are reacted and are removed as CO, etc. It is desirable that the thickness of the decarbonization layer from the surface layer part of this time be made 10mu or more. Next, the hoop having been decarbonized of the surface layer part is heat treated to make its central part into bainite structure. This bainite treatment is accomplished by heating the hoop at a temperature higher than the Ac3 point, preferably around 830-870 deg.C, for several minutes to hold the same in austenite region, thence holding the hoop at an equal temperature within the range of about 350-400 deg.C to allow isothermal transformation to complete thence preferably water-cooling the hoop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP38979A JPS5594444A (en) | 1979-01-09 | 1979-01-09 | Production of high carbon hot rolled steel plate of high strength and toughness and good workability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP38979A JPS5594444A (en) | 1979-01-09 | 1979-01-09 | Production of high carbon hot rolled steel plate of high strength and toughness and good workability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5594444A true JPS5594444A (en) | 1980-07-17 |
Family
ID=11472438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP38979A Pending JPS5594444A (en) | 1979-01-09 | 1979-01-09 | Production of high carbon hot rolled steel plate of high strength and toughness and good workability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5594444A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60159120A (en) * | 1984-01-28 | 1985-08-20 | Nisshin Steel Co Ltd | Steel sheet having composite structure, superior bendability and low yield ratio and its manufacture |
| WO2009024472A1 (en) * | 2007-08-17 | 2009-02-26 | Thyssenkrupp Steel Ag | Method for producing a surface-decarbonized hot-rolled strip |
-
1979
- 1979-01-09 JP JP38979A patent/JPS5594444A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60159120A (en) * | 1984-01-28 | 1985-08-20 | Nisshin Steel Co Ltd | Steel sheet having composite structure, superior bendability and low yield ratio and its manufacture |
| WO2009024472A1 (en) * | 2007-08-17 | 2009-02-26 | Thyssenkrupp Steel Ag | Method for producing a surface-decarbonized hot-rolled strip |
| US8449694B2 (en) | 2007-08-17 | 2013-05-28 | Thyssenkrupp Steel Europe Ag | Method for producing a surface-decarburised hot-rolled strip |
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