JPS55104427A - Production of steel for low temperature - Google Patents
Production of steel for low temperatureInfo
- Publication number
- JPS55104427A JPS55104427A JP1113179A JP1113179A JPS55104427A JP S55104427 A JPS55104427 A JP S55104427A JP 1113179 A JP1113179 A JP 1113179A JP 1113179 A JP1113179 A JP 1113179A JP S55104427 A JPS55104427 A JP S55104427A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- low temperature
- strength
- temperature
- impact toughness
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract 4
- 239000010959 steel Substances 0.000 title abstract 4
- 230000009466 transformation Effects 0.000 abstract 2
- 229910052684 Cerium Inorganic materials 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 229910052746 lanthanum Inorganic materials 0.000 abstract 1
- 229910000734 martensite Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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)
Abstract
PURPOSE:To improve impact toughness and strength at low temperature by adequately controlling rolling conditions and the heat treatement after this with respect to the steel of the specific composition. CONSTITUTION:The steel containing C<0.2%, Si; 0.03-0.8, Mn; 0.5-4.5%, Ni; 0.5-6.0%, Al-sol<0.07%, Nb; 0.005-0.2% as basic components is added, if necessary, with one or two or more kinds of Cr<1%, Mo<0.8%, Cu<0.5%, V< 0.2%, Ti<0.1%, La<0.03%, Ce<0.03%. This steel ingot is hot rolled at a draft of 60% or more in the temperature region between 1100 deg.C to Ar3 transformation point. Next, it is held for 30sec-60min in the temperature region beteen Ar3-Ar1 transormation point, after which it is hardened and further it is tempered at the temperature lower than the Ac1 transformation point. The structure assumes the form wherein the tempered martensite is encircled by fine ferrite grains and this results in improved impact toughness and strength at low temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1113179A JPS55104427A (en) | 1979-02-02 | 1979-02-02 | Production of steel for low temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1113179A JPS55104427A (en) | 1979-02-02 | 1979-02-02 | Production of steel for low temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55104427A true JPS55104427A (en) | 1980-08-09 |
| JPS6117885B2 JPS6117885B2 (en) | 1986-05-09 |
Family
ID=11769455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1113179A Granted JPS55104427A (en) | 1979-02-02 | 1979-02-02 | Production of steel for low temperature |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55104427A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59129724A (en) * | 1983-01-14 | 1984-07-26 | Nippon Steel Corp | Manufacturing method for thick-walled ultra-high tensile strength steel |
| JPH042718A (en) * | 1990-04-19 | 1992-01-07 | Kawasaki Steel Corp | Production of medium strength steel plate having high yield point and high toughness |
| CN102676920A (en) * | 2012-04-25 | 2012-09-19 | 舞阳钢铁有限责任公司 | Large-thickness steel plate for low-temperature pressure container and production method thereof |
| CN112063930A (en) * | 2020-09-21 | 2020-12-11 | 新余钢铁股份有限公司 | Rare earth treated low-cost high-toughness low-temperature pressure vessel steel plate and production method thereof |
-
1979
- 1979-02-02 JP JP1113179A patent/JPS55104427A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59129724A (en) * | 1983-01-14 | 1984-07-26 | Nippon Steel Corp | Manufacturing method for thick-walled ultra-high tensile strength steel |
| JPH042718A (en) * | 1990-04-19 | 1992-01-07 | Kawasaki Steel Corp | Production of medium strength steel plate having high yield point and high toughness |
| CN102676920A (en) * | 2012-04-25 | 2012-09-19 | 舞阳钢铁有限责任公司 | Large-thickness steel plate for low-temperature pressure container and production method thereof |
| CN112063930A (en) * | 2020-09-21 | 2020-12-11 | 新余钢铁股份有限公司 | Rare earth treated low-cost high-toughness low-temperature pressure vessel steel plate and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6117885B2 (en) | 1986-05-09 |
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