CN104674112A - High-strength alloy steel plate for pressure vessel and preparation method thereof - Google Patents
High-strength alloy steel plate for pressure vessel and preparation method thereof Download PDFInfo
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- CN104674112A CN104674112A CN201510132436.0A CN201510132436A CN104674112A CN 104674112 A CN104674112 A CN 104674112A CN 201510132436 A CN201510132436 A CN 201510132436A CN 104674112 A CN104674112 A CN 104674112A
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0231—Warm rolling
-
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
Abstract
The invention belongs to the technical field of metal material manufacture and particularly relates to a high-strength alloy steel plate for a pressure vessel and a preparation method thereof. The high-strength alloy steel plate for the pressure vessel comprises the following components by weight percentage: 0.20-0.25% of carbon, 0.20-0.40% of silicon, 1.35-1.60% of manganese, less than or equal to 0.018% of phosphorus, less than or equal to 0.008% of sulphur, 0.14-0.18% of vanadium, 0.40-0.70% of nickel and the balance of iron and unavoidable impurities. The high-strength alloy steel plate for the pressure vessel is high in strength and tenacity, low in yield ratio and good in welding performance and can be widely used in the pressure vessel manufacture.
Description
Technical field
The invention belongs to the technical field that metallic substance manufactures, be specifically related to a kind of pressurized vessel high-strength alloy steel plate and preparation method thereof.
Background technology
Along with the fast development of national economy, the technology such as generating, metallurgy, chemical industry, food, papermaking improves constantly, and the demand being applied to the pressurized vessel in high temperature, low temperature environment significantly increases, and the demand of pressurized vessel high-strength alloy steel plate is increasing.
Pressurized vessel generally uses in the environment such as High Temperature High Pressure, and security requirement is higher.Not only require that steel plate has good resistance to elevated temperatures, also need lower yield tensile ratio, be conducive to improving plasticity; And be conducive to ensureing the security in use.
People, in order to ensure the high-temperature behavior of steel, ignore the toughness of steel usually, and general high temperature resistant steel plate only requires that 20 DEG C of summers are than V-type impact energy >=34J, and the brittle transition temperature of steel is higher, is unfavorable for the use safety of steel.
Summary of the invention
The object of the invention is to the defect for above-mentioned existence and a kind of pressurized vessel high-strength alloy steel plate and preparation method thereof is provided, adopt C, Si, Mn, V, Ni Composition Design, and in conjunction with converter smelting, the production technique such as refining, sheet billet continuous casting, two-phase control rolling, normalizing, make the yield strength >=500MPa of gained alloy steel plate, tensile strength >=750MPa ,-40 DEG C of horizontal summers are than V-type shock absorption energy >=120J.This pressurized vessel high-strength alloy steel plate has high strength, high tenacity, low yield strength ratio, good welds performance, is widely used in the manufacture of pressurized vessel.
Technical scheme of the present invention is: a kind of pressurized vessel high-strength alloy steel plate, comprise the component of following weight percent: carbon 0.20 ~ 0.25%, silicon 0.20 ~ 0.40%, manganese 1.35 ~ 1.60%, phosphorus≤0.018%, sulphur≤0.008%, vanadium 0.14 ~ 0.18%, nickel 0.40 ~ 0.70%, surplus is iron and inevitable impurity.
Described pressurized vessel high-strength alloy steel plate, comprises the component of following weight percent: carbon 0.21 ~ 0.24%, silicon
0.25 ~ 0.35%, manganese 1.45 ~ 1.55%, phosphorus≤0.015%, sulphur≤0.005%, vanadium 0.15 ~ 0.17%, nickel 0.50 ~ 0.60%, surplus is iron and inevitable impurity.
Described pressurized vessel high-strength alloy steel plate, comprises the component of following weight percent: carbon 0.23%, silicon 0.37%, manganese 1.54%, phosphorus 0.015%, sulphur 0.002%, vanadium 0.18%, nickel 0.63%, and surplus is iron and inevitable impurity.
Described pressurized vessel high-strength alloy steel plate, comprises the component of following weight percent: carbon 0.22%, silicon 0.30%, manganese 1.47%, phosphorus 0.012%, sulphur 0.005%, vanadium 0.17%, nickel 0.56%, and surplus is iron and inevitable impurity.
Described pressurized vessel high-strength alloy steel plate, comprises the component of following weight percent: carbon 0.21%, silicon 0.28%, manganese 1.38%, phosphorus 0.014%, sulphur 0.003%, vanadium 0.16%, nickel 0.47%, and surplus is iron and inevitable impurity.
A preparation method for described pressurized vessel high-strength alloy steel plate, comprises the following steps:
(1) converter smelting: electrolytic nickel adds in converter with steel scrap, basicity target 2.8 ~ 3.2, terminal target C 0.08% ~ 0.12%, P≤0.012%, S≤0.007%; Steel ladle full Argon is ensured in tapping process;
(2) deoxidation alloying: add composite deoxidant AlMnTi pre-deoxidation during tapping, large bag adds agent for purifying molten steel cleaning molten steel, alloy adds before tapping 4/5, alloy addition sequence is followed successively by high carbon ferromanganese, manganese-silicon, aluminium block, vanadium iron, tap complete, argon blowing time >=12 minute, containing tapping Argon, feed aluminum steel deoxidation;
(3) refining: adopt LF refining and the mode that VD vacuum outgas combines or LF refining combines with RH refining; Deoxidation, dehydrogenation, desulfurization, removal of inclusions, pure steel; Xiang Gangzhong feeds CaFe line, improves distribution and the form of inclusion;
(4) sheet billet continuous casting: middle bag uses alkaline covering agent, in casting process, dynamic secondary cooling water distribution adopts AmedC water distribution, and static two cold water distributions adopt weak cold, and use medium carbon steel covering slag, middle bag uses alkaline covering agent; Conical degree of crystallizer 1.10 ~ 1.15%, slab pulling rate 0.9 ~ 1.0m/min, tundish superheating temperature 15 ~ 25 DEG C; Adopt slighter compress, alleviate strand segregation; Strand low power requires: center segregation C class≤1.5 grade, center porosity≤0.5 grade, without internal fissure.
(5) two-phase control rolling: heating of plate blank is come out of the stove the dephosphorization of laggard horizontal high voltage water, adopt roughing and finish rolling two-phase control rolling, rough rolling step adds heavy reduction, requires total reduction >=60%, broken austenite crystal; Finish rolling finishing temperature 840 ~ 860 DEG C, after rolling, the relaxation dead time controls at 21 ~ 29s, and the laggard line space of relaxation is cold;
(6) normalizing: normalizing temperature 870 ~ 890 DEG C, soaking time 1.1 ~ 1.4min/mm, obtains ferrite+perlite+bainite structure, makes steel have high strength, high tenacity, low yield strength ratio, good welds performance etc.
Beneficial effect of the present invention is: pressurized vessel high-strength alloy steel plate of the present invention for pressurized vessel property and unique design is made to the composition of its alloy steel plate used:
C: make a significant impact the intensity of steel, welding property, suitably improves intensity, particularly tensile strength that carbon effectively can improve steel, is conducive to the yield tensile ratio reducing steel; But carbon is too high, be unfavorable for welding; Therefore C 0.20 ~ 0.25% of the present invention.
Mn: add in steel as deoxidant element and alloying element, adds Mn element in steel, that can eliminate that FeS and FeO cause is hot-short, improves the hot workability of structure iron, also can reduce cold shortness simultaneously.Manganese dissolves in ferrite (α-Fe), dissolves in again in cementite and forms carbide [Mn3C; (Fe, Mn) 3], increase the intensity of steel.Manganese can expand γ district, makes the thermoplasticity processing temperature range extension of steel, is conducive to the enforcement of production control technique.But manganese is also the element increasing carbon equivalent, too high, is unfavorable for welding; Therefore Mn:1.35 ~ 1.60% of the present invention
Si: the avidity of silicon and oxygen is very strong, uses as deoxidant element.Silicon does not form carbide in steel, but is present in ferrite with the form of sosoloid.Si:0.20 ~ 0.40% of the present invention.
V: vanadium is very strong carbide forming element, vanadium, with tiny and the carbide of disperse and nitride are present in steel, does not decompose under normal thermal treatment temp, can inhibiting grain growth, plays the effect of grain refining.Vanadium also has very strong precipitation strength effect.The Main Function of vanadium improves heat resistance, its effect and molybdenum close, but there is optimum content interval.Add-on is more can reduce thermostability, and the present invention 0.14 ~ 0.18%.
Ni: be pure solid solution element in steel, has the effect obviously reducing cold short transition temperature.Ni and iron with the form of dissolving each other be present in a and Y iron mutually in, by its adsorption fining ferrite grains in crystal grain, improve the impelling strength of steel.But Ni expands austenite element, reduces austenitic transition temperature, thus has influence on the velocity of diffusion of carbon and alloying element simultaneously, stop austenite to perlitic transformation, reduce the critical cooling velocity of steel, the hardening capacity of steel can be improved, easily make in steel, to occur bainite and martensite.Therefore, control suitable Ni content, make it keep single ferrite+perlite to be the key improving toughness.
The elements such as S, P, as harmful element, should strictly control its content, avoid causing macrosegregation, to improve toughness, the cold-forming property and welding property etc. of steel.P≤0.018% of the present invention, S≤0.008%.
The present invention adopts C, Mn, V, Ni Composition Design, alloy content is low, reduce cost, not only ensure that steel plate normal-temperature high-strength degree, high-temperature behavior requirement, also make steel plate have high tenacity simultaneously, effectively reduce yield tensile ratio and brittle transition temperature, improve the security that steel plate uses in hot environment.
The present invention is on above-mentioned chemical composition design basis, in order to make steel plate have high strength, high tenacity, low strong ratio, good high-temperature behavior etc., adopt the explained hereafter such as converter smelting, LF+VD or RH external refining, sheet billet continuous casting, two-phase control rolling, normalizing.
Wherein (5) two-phase control rolling: heating of plate blank is come out of the stove the dephosphorization of laggard horizontal high voltage water, adopts roughing and finish rolling two-phase control rolling, and reduce the anisotropy of plate property, rough rolling step adds heavy reduction, requires total reduction >=60%, broken austenite crystal.Make grain refining, finish rolling finishing temperature 840 ~ 860 DEG C, improve the performance of steel plate, after rolling, the relaxation dead time controls at 21 ~ 29s, and the laggard line space of relaxation is cold, obtains ferrite+bainite heterogeneous structure, in plastic history, soft phase ferrite is first surrendered, in further deformation process, hard phase bainite can improve tensile strength, makes that the yield strength of steel is lower and tensile strength is higher, and yield tensile ratio is lower.
(6) normalizing: normalizing temperature 870 ~ 890 DEG C, soaking time 1.1 ~ 1.5min/mm, obtains ferrite+perlite+bainite structure, crystal grain thinning, eliminate stress, elimination Widmannstatten structure and banded structure make steel have high strength, high tenacity, low yield strength ratio, good welds performance etc.
Described preparation method, under existing installation condition, adopt converter smelting, smelting process strictly controls non-metallic inclusion, achieves the production of Clean Steel.
Alloy steel plate of the present invention has high strength, high tenacity, good welds performance etc., and yield tensile ratio is low, and brittle transition temperature is low.There are higher high temperature resistant creep rupture strength and rupture ductility, good antioxidant property, and enough toughness, cold and hot working, weldability and structure stability, thus ensure that the security that steel plate uses in hot environment.
Pressurized vessel high-strength alloy steel plate of the present invention, yield strength >=500MPa, tensile strength >=750MPa ,-40 DEG C of horizontal summers are than V-type shock absorption energy >=120J.
Embodiment
Below by embodiment, the present invention will be described in detail.
Embodiment 1
The thickness producing steel plate is 100mm.
1. chemical composition is (weight percent): carbon 0.23%, silicon 0.37%, manganese 1.54%, phosphorus 0.015%, sulphur 0.002%, vanadium 0.18%, nickel 0.63%, and surplus is iron and inevitable impurity.
2. preparation method:
(1) converter smelting: electrolytic nickel adds in converter with steel scrap, basicity target 2.9, terminal target C 0.12%, P0.010%, S0.006%; Steel ladle full Argon is ensured in tapping process;
(2) deoxidation alloying: add composite deoxidant AlMnTi pre-deoxidation during tapping, large bag adds agent for purifying molten steel cleaning molten steel, alloy adds before tapping 4/5, alloy addition sequence: high carbon ferromanganese → manganese-silicon → aluminium block → vanadium iron, tap complete, argon blowing time 16 minutes (containing tapping Argon), feeds aluminum steel 1.5m/t;
(3) refining: adopt LF refining and VD vacuum outgas, vacuum time 16 minutes, feeds CaFe line 1.1m/t;
(4) sheet billet continuous casting: middle bag uses alkaline covering agent, in casting process, dynamic secondary cooling water distribution adopts AmedC water distribution, and static two cold water distributions adopt weak cold, and use medium carbon steel covering slag, middle bag uses alkaline covering agent; Conical degree of crystallizer 1.11%, slab pulling rate 0.9m/min, tundish superheating temperature 22 DEG C; Adopt slighter compress; Strand low power: center segregation C class 1.5 grades, center porosity 0.5 grade, without internal fissure.
(5) two-phase control rolling: heating of plate blank is come out of the stove the dephosphorization of laggard horizontal high voltage water, adopt roughing and finish rolling two-phase control rolling, rough rolling step adds heavy reduction, total reduction 63%, finish rolling finishing temperature 843 DEG C, after rolling, the relaxation dead time controls at 28s, and the laggard line space of relaxation is cold;
(6) normalizing: normalizing temperature 873 DEG C, soaking time 1.4min/mm.
3. performance index: yield strength 562MPa, tensile strength 810MPa, yield tensile ratio 0.69 ,-40 DEG C of horizontal summers are than V-type shock absorption energy 252J.
Embodiment 2
The thickness producing steel plate is 50mm.
1. the chemical composition of steel plate is (weight percent): carbon 0.22%, silicon 0.30%, manganese 1.47%, phosphorus 0.012%, sulphur 0.005%, vanadium 0.17%, nickel 0.56%, and surplus is iron and inevitable impurity.
2. preparation method:
(1) converter smelting: electrolytic nickel adds in converter with steel scrap, basicity target 3.0, terminal target C 0.10%, P0.007%, S0.005%; Steel ladle full Argon is ensured in tapping process;
(2) deoxidation alloying: add composite deoxidant AlMnTi pre-deoxidation during tapping, large bag adds agent for purifying molten steel cleaning molten steel, alloy adds before tapping 4/5, alloy addition sequence: high carbon ferromanganese → manganese-silicon → aluminium block → vanadium iron, tap complete, argon blowing time 15 minutes (containing tapping Argon), feeds aluminum steel 1.6m/t;
(3) refining: adopt LF refining and VD vacuum outgas, vacuum time 17 minutes, feeds CaFe line 1.2m/t;
(4) sheet billet continuous casting: middle bag uses alkaline covering agent, in casting process, dynamic secondary cooling water distribution adopts AmedC water distribution, and static two cold water distributions adopt weak cold, and use medium carbon steel covering slag, middle bag uses alkaline covering agent; Conical degree of crystallizer 1.13%, slab pulling rate 0.9m/min, tundish superheating temperature 21 DEG C; Adopt slighter compress; Strand low power: center segregation C class 1.5 grades, center porosity 0.5 grade, without internal fissure.
(5) two-phase control rolling: heating of plate blank is come out of the stove the dephosphorization of laggard horizontal high voltage water, adopt roughing and finish rolling two-phase control rolling, rough rolling step adds heavy reduction, total reduction 67%, finish rolling finishing temperature 856 DEG C, after rolling, the relaxation dead time controls at 26s, and the laggard line space of relaxation is cold;
(6) normalizing: normalizing temperature 882 DEG C, soaking time 1.2min/mm.
3. performance index: yield strength 590MPa, tensile strength 845MPa, yield tensile ratio 0.70 ,-40 DEG C of horizontal summers are than V-type shock absorption energy 230J.
Embodiment 3
The thickness producing steel plate is 6mm.
1. the chemical composition of steel plate is (weight percent): carbon 0.21%, silicon 0.28%, manganese 1.38%, phosphorus 0.014%, sulphur 0.003%, vanadium 0.16%, nickel 0.47%, and surplus is iron and inevitable impurity,
2. preparation method:
(1) converter smelting: electrolytic nickel adds in converter with steel scrap, basicity target 3.1, terminal target C 0.08%, P0.009%, S0.005%; Steel ladle full Argon is ensured in tapping process;
(2) deoxidation alloying: add composite deoxidant AlMnTi pre-deoxidation during tapping, large bag adds agent for purifying molten steel cleaning molten steel, alloy adds before tapping 4/5, alloy addition sequence: high carbon ferromanganese → manganese-silicon → aluminium block → vanadium iron, tap complete, argon blowing time 13 minutes (containing tapping Argon), feeds aluminum steel 1.6m/t;
(3) refining: adopt LF refining and RH vacuum outgas; Vacuum time 15 minutes.Feed CaFe line 1.2m/t;
(4) sheet billet continuous casting: middle bag uses alkaline covering agent, in casting process, dynamic secondary cooling water distribution adopts AmedC water distribution, and static two cold water distributions adopt weak cold, and use medium carbon steel covering slag, middle bag uses alkaline covering agent; Conical degree of crystallizer 1.14%, slab pulling rate 1.0m/min, tundish superheating temperature 19 DEG C; Adopt slighter compress; Strand low power: center segregation C class 1.5 grades, center porosity 0.5 grade, without internal fissure.
(5) two-phase control rolling: heating of plate blank is come out of the stove the dephosphorization of laggard horizontal high voltage water, adopt roughing and finish rolling two-phase control rolling, rough rolling step adds heavy reduction, total reduction 69%, finish rolling finishing temperature 851 DEG C, after rolling, the relaxation dead time controls at 22s, and the laggard line space of relaxation is cold;
(6) normalizing: normalizing temperature 886 DEG C, soaking time 1.3min/mm.
3. performance index: yield strength 615MPa, tensile strength 893Pa, yield tensile ratio 0.69 ,-40 DEG C of horizontal summers are than V-type shock absorption energy 276J.
Claims (6)
1. a pressurized vessel high-strength alloy steel plate, it is characterized in that, comprise the component of following weight percent: carbon 0.20 ~ 0.25%, silicon 0.20 ~ 0.40%, manganese 1.35 ~ 1.60%, phosphorus≤0.018%, sulphur≤0.008%, vanadium 0.14 ~ 0.18%, nickel 0.40 ~ 0.70%, surplus is iron and inevitable impurity.
2. pressurized vessel high-strength alloy steel plate according to claim 1, it is characterized in that, comprise the component of following weight percent: carbon 0.21 ~ 0.24%, silicon 0.25 ~ 0.35%, manganese 1.45 ~ 1.55%, phosphorus≤0.015%, sulphur≤0.005%, vanadium 0.15 ~ 0.17%, nickel 0.50 ~ 0.60%, surplus is iron and inevitable impurity.
3. pressurized vessel high-strength alloy steel plate according to claim 1, is characterized in that, comprise the component of following weight percent: carbon 0.23%, silicon 0.37%, manganese 1.54%, phosphorus 0.015%, sulphur 0.002%, vanadium 0.18%, nickel 0.63%, surplus is iron and inevitable impurity.
4. pressurized vessel high-strength alloy steel plate according to claim 1, is characterized in that, comprise the component of following weight percent: carbon 0.22%, silicon 0.30%, manganese 1.47%, phosphorus 0.012%, sulphur 0.005%, vanadium 0.17%, nickel 0.56%, surplus is iron and inevitable impurity.
5. pressurized vessel high-strength alloy steel plate according to claim 1, is characterized in that, comprise the component of following weight percent: carbon 0.21%, silicon 0.28%, manganese 1.38%, phosphorus 0.014%, sulphur 0.003%, vanadium 0.16%, nickel 0.47%, surplus is iron and inevitable impurity.
6. the preparation method for high-strength alloy steel plate of pressurized vessel described in claim 1, comprises the following steps:
(1) converter smelting: electrolytic nickel adds in converter with steel scrap, basicity target 2.8 ~ 3.2, terminal target C 0.08% ~ 0.12%, P≤0.012%, S≤0.007%; Steel ladle full Argon is ensured in tapping process;
(2) deoxidation alloying: add composite deoxidant AlMnTi pre-deoxidation during tapping, large bag adds agent for purifying molten steel cleaning molten steel, alloy adds before tapping 4/5, alloy addition sequence is followed successively by high carbon ferromanganese, manganese-silicon, aluminium block, vanadium iron, tap complete, argon blowing time >=12 minute, containing tapping Argon, feed aluminum steel deoxidation;
(3) refining: adopt LF refining and the mode that VD vacuum outgas combines or LF refining combines with RH refining; Deoxidation, dehydrogenation, desulfurization, removal of inclusions, pure steel; Xiang Gangzhong feeds CaFe line, improves distribution and the form of inclusion;
(4) sheet billet continuous casting: middle bag uses alkaline covering agent, in casting process, dynamic secondary cooling water distribution adopts AmedC water distribution, and static two cold water distributions adopt weak cold, and use medium carbon steel covering slag, middle bag uses alkaline covering agent; Conical degree of crystallizer 1.10 ~ 1.15%, slab pulling rate 0.9 ~ 1.0m/min, tundish superheating temperature 15 ~ 25 DEG C; Adopt slighter compress, alleviate strand segregation; Strand low power requires: center segregation C class≤1.5 grade, center porosity≤0.5 grade, without internal fissure;
(5) two-phase control rolling: heating of plate blank is come out of the stove the dephosphorization of laggard horizontal high voltage water, adopts roughing and finish rolling two-phase control rolling, rough rolling step total reduction >=60%, broken austenite crystal; Finish rolling finishing temperature 840 ~ 860 DEG C, after rolling, the relaxation dead time controls at 21 ~ 29s, and the laggard line space of relaxation is cold;
(6) normalizing: normalizing temperature 870 ~ 890 DEG C, soaking time 1.1 ~ 1.4min/mm, obtains ferrite+perlite+bainite structure.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106544581A (en) * | 2016-09-30 | 2017-03-29 | 秦皇岛首秦金属材料有限公司 | A kind of high-strength container steel of normalizing state nickel-vanadium alloy and its production method |
| CN106995868A (en) * | 2017-05-27 | 2017-08-01 | 马鞍山华盛冶金科技发展有限公司 | A kind of method of use agent for purifying molten steel refining liquid steel |
| CN113166896A (en) * | 2018-11-30 | 2021-07-23 | 株式会社Posco | Steel material for pressure vessel having excellent hydrogen-induced cracking resistance and method for producing same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003239036A (en) * | 2002-02-19 | 2003-08-27 | Nippon Steel Corp | Thick steel plate having excellent fatigue strength and production method therefor |
| CN101144138A (en) * | 2007-11-01 | 2008-03-19 | 济南钢铁股份有限公司 | Steel plate for low temperature pressure container and producing method thereof |
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2015
- 2015-03-25 CN CN201510132436.0A patent/CN104674112B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003239036A (en) * | 2002-02-19 | 2003-08-27 | Nippon Steel Corp | Thick steel plate having excellent fatigue strength and production method therefor |
| CN101144138A (en) * | 2007-11-01 | 2008-03-19 | 济南钢铁股份有限公司 | Steel plate for low temperature pressure container and producing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106544581A (en) * | 2016-09-30 | 2017-03-29 | 秦皇岛首秦金属材料有限公司 | A kind of high-strength container steel of normalizing state nickel-vanadium alloy and its production method |
| CN106995868A (en) * | 2017-05-27 | 2017-08-01 | 马鞍山华盛冶金科技发展有限公司 | A kind of method of use agent for purifying molten steel refining liquid steel |
| CN113166896A (en) * | 2018-11-30 | 2021-07-23 | 株式会社Posco | Steel material for pressure vessel having excellent hydrogen-induced cracking resistance and method for producing same |
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