CN104451391A - Low-temperature steel and preparation method thereof - Google Patents
Low-temperature steel and preparation method thereof Download PDFInfo
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- CN104451391A CN104451391A CN201410713363.XA CN201410713363A CN104451391A CN 104451391 A CN104451391 A CN 104451391A CN 201410713363 A CN201410713363 A CN 201410713363A CN 104451391 A CN104451391 A CN 104451391A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to a low-temperature steel. The low-temperature steel comprises the following chemical components: 0.15%-0.20% of C, 0.025% of S, 0.06%-0.09% of V, 0.02% of Cu, 0.90%-1.10% of Mn, 0.50%-0.90% of Si, 0.040% of P, 0.01-0.03% of Ca and the balance of Fe. According to the preparation method provided by the invention, blast furnace molten iron is adopted as a raw material and is subjected to decarbonization and alloying so that the steel has excellent low-temperature toughness as well as lower production cost and the sufficient strength and toughness of the steel are simultaneously ensured.
Description
Technical field
The present invention relates to a kind of low-temperature steel and preparation method thereof.
Background technology
Low-temperature steel refers to the steel alloy being suitable for application below 0 DEG C.Can use below-196 DEG C, be called deep cooling steel or very low temperature steel.Low-temperature steel mainly should have following performance: 1. Ductile-brittle transition temperature is lower than use temperature; 2. the intensity met design requirement; 3. weave construction is stablized at service temperatures; 4. good weldability and processing forming; 5. some special purpose also requires extremely low magnetic permeability, cold events rate etc.Low-temperature steel generally can be divided into body-centred cubic ferritic steel for low temperature service and the large class of face-centred cubic austenitic cryogenic steel two by crystal lattice type.Low-temperature steel is in petroleum gas low temperature separation process equipment, and the minimum use temperature of the overwhelming majority is-110 DEG C, reaches-150 DEG C, can adopt low alloy steel, 3 ~ 6% nickel steels or 9% nickel steel respectively in individual plants.In air separation equipment, minimum operating temperature reaches-196 DEG C, general employing 9% nickel steel or austenitic cryogenic steel.Working temperature is that the liquid hydrogen of-253 DEG C is produced, storage and transportation equipment, and working temperature is the liquid helium equipment of-269 DEG C, all should adopt the austenitic cryogenic steel that weave construction is stable.And some specific installation is as superconducting magnet or superconduction electricmachine, should adopt apart from outside stable austenite structure below working temperature, also want can keep pole low magnetic permeability (μ)≤1.01 or lower) steel grade.Some have and nickel base superalloy such as A-286, Inconel718, InconelX-750 etc. Ni-based compared with the iron of high/low temperature toughness and are also usually used in needing in the cyrogenic equipment of high strength.At present because low-temperature steel component requirements controls strict, cause smelting technology very complicated, production cost is very high.
Summary of the invention
The technical problem to be solved in the present invention is to provide simple low-temperature steel of a kind of production technique and preparation method thereof.This low-temperature steel has excellent low-temperature flexibility and has lower production cost simultaneously.
The technical solution adopted for the present invention to solve the technical problems is:
Low-temperature steel, has following chemical composition: C0.15% mono-0.20%, S0.025%, V0.06% mono-0.09%, Cu0.02%, Mn0.90% mono-1.10%, Si0.50% mono-0.90%, P0.040%, Ca0.01-0.03%, surplus is Fe.
Described low-temperature steel, has following chemical composition: C 0.20%, S0.025%, V0.08%, Cu0.02%, Mn 1.00%, Si0.70%, P0.040%, Ca0.02%, and surplus is Fe.
The preparation method of described low-temperature steel, is characterized in that comprising the following steps:
(1) blast-melted being incorporated in decarbonizing furnace is carried out carbonization treatment, obtain cast steel liquid; (2) cast steel liquid is successively through converter, process furnace and vacuum oven process and trimming; (3) rolling.
The advantage that the present invention has and effect are:
The preparation method of low-temperature steel provided by the invention is blast-melted as raw material by using, and through decarburization and alloying, makes this steel have excellent low-temperature flexibility and have lower production cost simultaneously.Ensure that steel have enough intensity and toughness simultaneously.
Embodiment
Embodiment 1:
The low-temperature steel of the present embodiment has following chemical composition: C0.15%, S0.025%, V 0.09%, Cu0.02%, Mn 1.10%, Si 0.90%, P0.040%, Ca0.03%, and surplus is Fe.
The preparation method of low-temperature steel, comprises the following steps:
(1) blast-melted being incorporated in decarbonizing furnace is carried out carbonization treatment, obtain cast steel liquid; (2) cast steel liquid is successively through converter, process furnace and vacuum oven process and trimming; (3) rolling.
Embodiment 2:
The low-temperature steel of the present embodiment has following chemical composition: C 0.20%, S0.025%, V0.06%, Cu0.02%, Mn0.90%, Si0.50%, P0.040%, Ca0.01%, and surplus is Fe.
The preparation method of the present embodiment is with embodiment 1.
Embodiment 3:
The low-temperature steel of the present embodiment has following chemical composition: C 0.20%, S0.025%, V0.08%, Cu0.02%, Mn 1.00%, Si0.70%, P0.040%, Ca0.02%, and surplus is Fe.
The preparation method of the present embodiment is with embodiment 1.
The Chemical Composition of the low-temperature steel described in embodiment of the present invention 1-3 is as following table:
| Chemical Composition % | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| C | 0．05 | 0．48 | 0．52 |
| Si | 0．20 | 0．22 | 0．25 |
| Mn | 0．10 | 1．01 | 0．15 |
| P | 0．004 | 0．005 | 0．006 |
| S | 0．003 | 0．004 | 0．006 |
| V | 0．01 | 0．02 | 0．03 |
Claims (3)
1. low-temperature steel, is characterized in that having following chemical composition: C0.15% mono-0.20%, S0.025%, V0.06% mono-0.09%, Cu0.02%, Mn0.90% mono-1.10%, Si0.50% mono-0.90%, P0.040%, Ca0.01-0.03%, surplus is Fe.
2. low-temperature steel according to claim 1, is characterized in that having following chemical composition: C 0.20%, S0.025%, V0.08%, Cu0.02%, Mn 1.00%, Si0.70%, P0.040%, Ca0.02%, and surplus is Fe.
3. prepare the preparation method of low-temperature steel according to claim 1, it is characterized in that comprising the following steps:
(1) blast-melted being incorporated in decarbonizing furnace is carried out carbonization treatment, obtain cast steel liquid; (2) cast steel liquid is successively through converter, process furnace and vacuum oven process and trimming; (3) rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713363.XA CN104451391A (en) | 2014-12-02 | 2014-12-02 | Low-temperature steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410713363.XA CN104451391A (en) | 2014-12-02 | 2014-12-02 | Low-temperature steel and preparation method thereof |
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| Publication Number | Publication Date |
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| CN104451391A true CN104451391A (en) | 2015-03-25 |
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| CN201410713363.XA Pending CN104451391A (en) | 2014-12-02 | 2014-12-02 | Low-temperature steel and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110724878A (en) * | 2019-10-30 | 2020-01-24 | 鞍钢股份有限公司 | 0.5Ni low-temperature steel and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618784A (en) * | 2012-03-22 | 2012-08-01 | 宝山钢铁股份有限公司 | 60kg-level low-cost and high-toughness steel plate and production method thereof |
| WO2014092025A1 (en) * | 2012-12-12 | 2014-06-19 | 株式会社神戸製鋼所 | High-strength steel plate and manufacturing method thereof |
| CN103917682A (en) * | 2011-11-01 | 2014-07-09 | 杰富意钢铁株式会社 | High-strength hot-rolled steel sheet having excellent bending characteristics and low-temperature toughness and method for producing same |
| CN104018081A (en) * | 2014-06-25 | 2014-09-03 | 武汉钢铁(集团)公司 | Low-temperature resistant special steel bar and production method thereof |
-
2014
- 2014-12-02 CN CN201410713363.XA patent/CN104451391A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103917682A (en) * | 2011-11-01 | 2014-07-09 | 杰富意钢铁株式会社 | High-strength hot-rolled steel sheet having excellent bending characteristics and low-temperature toughness and method for producing same |
| CN102618784A (en) * | 2012-03-22 | 2012-08-01 | 宝山钢铁股份有限公司 | 60kg-level low-cost and high-toughness steel plate and production method thereof |
| WO2014092025A1 (en) * | 2012-12-12 | 2014-06-19 | 株式会社神戸製鋼所 | High-strength steel plate and manufacturing method thereof |
| CN104018081A (en) * | 2014-06-25 | 2014-09-03 | 武汉钢铁(集团)公司 | Low-temperature resistant special steel bar and production method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110724878A (en) * | 2019-10-30 | 2020-01-24 | 鞍钢股份有限公司 | 0.5Ni low-temperature steel and manufacturing method thereof |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |