CN105755369B - A kind of steel plate of the easy welding anti-lamellar tearing excellent performance of low temperature and preparation method thereof - Google Patents
A kind of steel plate of the easy welding anti-lamellar tearing excellent performance of low temperature and preparation method thereof Download PDFInfo
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- CN105755369B CN105755369B CN201610272420.4A CN201610272420A CN105755369B CN 105755369 B CN105755369 B CN 105755369B CN 201610272420 A CN201610272420 A CN 201610272420A CN 105755369 B CN105755369 B CN 105755369B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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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Abstract
The present invention relates to a kind of steel plate of the easy welding anti-lamellar tearing excellent performance of low temperature, the chemical composition weight/mass percentage composition of the steel plate is C 0.05 0.09%；Si 0.2‑0.4%；Mn 0.9‑1.3%；Al 0.02‑0.04%；Nb 0.01‑0.03%；V 0.03‑0.05%；Cr 0.3‑0.5%；Ni 1.0‑1.4%；Mo 0.3‑0.6%；Cu 0.2‑0.6%；Ti 0.01‑0.02%；B 0.001‑0.002%；P≤0.015%；S≤0.003%；N≤0.007%；Surplus is Fe and inevitable impurity, carbon equivalent≤0.60；Weld crack sensitivity coefficient is：Pcm≤0.28.Through processing steps such as KR molten iron pretreatment-converter smelting-LF refining-RH vacuum outgas-continuous casting-rolling-aligning-steel plate heap slow cooling-Q-temperings, manufacture thickness distinguishes the 70 100mm easy welding steel of high-strength and high-ductility.
Description
Technical field
The present invention relates to 690MPa grades of medium plate technical field of forging, and in particular to a kind of anti-lamellar tearing easily welded
The 690MPa level steel plates and its manufacture method of excellent performance.
Background technology
Pile legs of self-elevating drilling platform main chord tube is mainly welded by rack-plate with semi-circular plate, therefore, semi-circular plate conduct
One key position of self-elevating drilling platform, is not required nothing more than with high-intensity high-tenacity, it is also desirable to have good easy welding
Property and anti-lamellar tearing performance are to meet the welding requirements during platform construction.Generally, it is desirable to the yield strength of semi-circular plate >=
- 40 DEG C of Charpy-V impact power >=69J at 690MPa, 770~940MPa of tensile strength, elongation percentage >=14%, the thickness of steel plate 1/4.With
Continuing to develop for deep-sea oil gas exploration, to meet the security needs of ocean platform under super adverse circumstances, except above-mentioned requirements meaning
Outside, higher requirement is proposed to ballistic work toughness, weldability and the anti-lamellar tearing performance of semi-circular plate at low temperature, it is desirable to-
Charpy-V impact power >=69J at 60 DEG C, C is in the case of≤0.12%, Pcm≤0.30, the Z-direction contraction percentage of area >=35%.At present, it is low
The high-strength and high-ductility steel plate for the 70-100mm thickness that can be used at -60 DEG C that the low-crackle sensitive of carbon design is easily welded is in state
It inside yet there are no report.
Patent announcement number proposes a kind of 690MPa grades of think gauge ocean engineering for CN103014541A patent of invention and used
Steel and its manufacture method, can manufacture the requirement of Charpy-V impact power satisfaction >=69J at maximum gauge 120mm steel plate, -60 DEG C.But
It is that technology C content 0.08-0.15%, 120mm thickness C content reaches 0.13%, and carbon equivalent is about 0.73 so that the steel plate is not
Meet the requirement easily welded.
It is quick that patent announcement number proposes a kind of yield strength 690MPa grades of low crackles for CN101418418A patent of invention
Perceptual steel plate and its manufacture method.But, its maximum gauge is 60mm, while not disclosing -60 DEG C of impact properties.
Patent announcement number proposes a kind of high-strength high-toughness steel plate and its manufacture for CN105039865A patent of invention
Method, C content is in 0.12-0.17%, -40 DEG C of Charpy-V impact power >=100J, not yet explicitly Ceq and Pcm values, and C content is higher, is discontented with
Foot easily welding requirements, while also without clear and definite -60 DEG C of low-temperature impact work situations.
The content of the invention
The technical problems to be solved by the invention are to provide one kind for above-mentioned prior art to use under the conditions of -60 DEG C
70-100mm thickness, carbon equivalent≤0.60, cold crack sensitivity coefficient（Pcm）≤ 0.28 easy anti-stratiform of welding high-strength and high-ductility
The excellent 690MPa steel plates of tear resistance and its manufacture method.
Typically to be maintained in larger content to improve the carbon content in the intensity of steel plate, steel plate, but as carbon contains
The raising of amount, the welding performance of steel can become poor；Especially, in the case where needing increase steel plate thickness, steel is being ensured
On the premise of plate intensity does not decline, more need to improve the carbon content in composition, also just further result in welded steel performance, resist
The deterioration of lamellar tearing performance, makes steel plate be restricted in structural steel application field.
The present invention the used technical scheme that solves the above problems is：A kind of easily welding anti-lamellar tearing excellent performance of low temperature
Steel plate, the chemical composition weight/mass percentage composition of steel plate is C 0.05-0.09%；Si 0.2-0.4%；Mn 0.9-1.3%；Al
0.02-0.04%；Nb 0.01-0.03%；V 0.03-0.05%；Cr 0.3-0.5%；Ni 1.0-1.4%；Mo 0.3-0.6%；Cu
0.2-0.6%；Ti 0.01-0.02%；B 0.001-0.002%；P≤0.015%；S≤0.003%；N≤0.007%；Surplus is Fe
And inevitable impurity, carbon equivalent≤0.60；Weld crack sensitivity coefficient is Pcm≤0.28, Pcm=C+Si/30+ (Mn+Cu+
Cr)/20+Ni/60+Mo/15+V/10+5B。
Compared with patent of invention publication number 103014541A, this invention takes lower carbon content design, and from element
Composition generally forces down carbon equivalent and crack-sensitivity coefficient, and it is excellent to ensure that steel plate has on the premise of armor plate strength is not reduced
Weldability.The smelting flow of steel plate is：KR molten iron pretreatment-converter-LF refining-RH vacuum outgas-sheet billet continuous casting-slow cooling-rolls
System-Tempering and Quenching-essence inspection-performance detection-packaging and storage.
The thickness of finished steel plate is 70~100mm, more than yield strength 690MPa, 770~940MPa of tensile strength, extension
At rate >=16%, 1/4 thickness and 1/2 thickness of -60 DEG C of lower steel plates Charpy-V impact power >=100J, the Z-direction contraction percentage of area >=35%,
It can meet and be on active service under -60 DEG C of ultra-low temperature surroundings.
The effect of contained all components and its content selection reason are described as follows in the present invention：
C：The essential element of intensity, quenching degree and weldability is influenceed, the intensity of steel is improved with solution strengthening form；Carbon content
Too high to have a negative impact to the toughness and weldability of steel, carbon content is too low, steel plate quenching degree can be caused not enough, intensity is inclined
It is low.Consider, C content range of choice of the present invention is 0.05-0.09%.
Si：Deoxidant element, the intensity of steel is improved with solution strengthening form, too low, influences deoxidation effect, it is too high can be to table
Face quality, toughness and welding performance have a negative impact, and consider, and Si contents range of choice of the present invention is 0.2-0.4%.
Mn：The main alloy element of intensity, quenching degree and weldability is influenceed, the intensity of steel is improved with solution strengthening form,
Make up deficiency caused by C reductions；Mn contents can not then play a part of solution strengthening when less than 0.8%, too high to improve steel
Carbon equivalent and crack-sensitivity coefficient, the weldability to steel has a negative impact；Meanwhile, Mn easily produces inclined in steel plate center portion
Analysis, has a negative impact to the low-temperature impact toughness of steel plate center portion.The range of choice of Mn contents of the present invention is 0.9-1.30%；
Al：Play deoxidation and fixed nitrogen, and play a part of crystal grain thinning by forming AlN.Al content of the present invention
Range of choice is 0.02-0.04%.
Nb：Can be in the operation of rolling by pinning effect and the notable fining austenite grains of precipitation enhancement, favorably
In the raising of intensity and toughness.Too high Nb can make it that production cost is significantly improved, while unfavorable to weldability.Nb of the present invention contains
The range of choice of amount is 0.01-0.03%.
V：Carbonitride-forming elements, by forming V（C, N）, the intensity and toughness of steel are improved in the form of dispersion-strengtherning,
Fining ferrite grains degree, too high levels can then have a negative impact to weldability.The range of choice of V content of the present invention is
0.03-0.05%。
Cr：Medium carbide former, it is possible to increase the quenching degree and intensity of steel, makes up that C content is relatively low to cause intensity
The deficiency declined with quenching degree.Excessive addition, then can have a negative impact to the low-temperature impact toughness and weldability of steel.The present invention
The range of choice of Cr contents is 0.3-0.5%.
Ni：The intensity of steel can be improved simultaneously and improves low-temperature impact toughness, and material is improved when Cu constituent contents are too high
Hot cracking tendency.During Ni too high levels, the higher iron scale of viscosity can be produced in continuous casting billet heating process, steel plate table is influenceed
Face quality.Meanwhile, too high Ni improves the carbon equivalent and crack-sensitivity coefficient of steel plate, influences the weldability of steel plate.Ni of the present invention
The range of choice of content is 1.0-1.4%.
Mo：The quenching degree and intensity of steel can be significantly improved, steel belt roof bolt is crisp when appropriate Mo can overcome modifier treatment
Property so as to improving the impact flexibility of steel.Crossing can at most have a negative impact to the weldability of steel, also result in cost increase.This hair
The range of choice of bright Mo contents is 0.2-0.6%.
Cu：The quenching degree, intensity and decay resistance of steel can be improved, the hydrogen induced cracking sensitiveness of steel plate is reduced；It is too high
Can have a negative impact to the weldability of steel plate, while needing to add more Ni to avoid producing copper brittleness phenomenon.Cu of the present invention
The range of choice of content is 0.2-0.6%.
Ti：Play a part of precipitation strength by forming TiN, effective crystal grain thinning, too high levels can then be produced to toughness
Adverse effect.The range of choice of Ti contents of the present invention is 0.01-0.02%.
B：The most significant element of quenching degree is improved, it is very unfavorable that too high levels can then be produced to weldability and low-temperature flexibility
Influence.The range of choice of B content of the present invention is 0.001-0.002%.
P、S：As the major impurity element in steel, the low-temperature impact toughness of steel plate especially steel plate center portion can be produced not
Profit influence, content control is more low better.According to existing actual production conditions, the range of choice of P, S content of the present invention for P≤
0.015%, S≤0.003%.
The preparation method of 690MPa grades of steel plates of above-mentioned easy welding includes following processing step：
（1）In steel making working procedure, produced using the pretreatment of KR molten iron, converter smelting, LF refining, RH Fruit storages
High-purity molten steel, then produces 370-450mm thickness continuous casting plate billets by special thick continuous casting steel billet production technology, continuous casting billet is entered
Row covering stacking slow cooling expands hydrogen processing, stacking slow cooling time >=120 hour；
（2）Continuous casting billet is heated to 1150-1250 DEG C, 150-180min is incubated, makes the abundant solid solution of the alloying element in steel
To ensure that the uniformity of performance, continuous casting billet use high-pressure water descaling after coming out of the stove；
（3）Continuous casting billet is subjected to two-phase control rolling, the first stage is rough rolling step, and start rolling temperature is single at 1100-1180 DEG C
Average reduction ratio >=15% of passage；Second stage is the finish rolling stage, and start rolling temperature is 840-900 DEG C, accumulative percentage pass reduction >=
40%；Thermal straightening is carried out after rolling；
（4）The offline heap slow cooling of steel plate expands the content of H in hydrogen processing, reduction steel plate to ensure steel plate center portion low temperature after thermal straightening
Impact flexibility, heap temperature retention time >=72 hour；
（5）Quenching+tempering processing is carried out to the steel plate after slow cooling, quenching and tempering are carried out in continuous oven, quenching temperature
Spend for 910-930 DEG C, quenching time inside furnace 1.8-2.2min/mm；Temperature is 630-680 DEG C, tempering time inside furnace 3.0-
4.0min/mm, air cooling produces steel plate finished product after coming out of the stove.
The present invention is directed on the requirement of the easy welding high-strength and high-ductility steel plate used under the conditions of -60 DEG C, composition using low
In the composition design of carbon, low-carbon-equivalent and low crack-sensitivity coefficient, technique, the smelting of high purity steel is used, with 370-450mm thickness
The special thick continuous casting steel billet of degree is taken the method for controlled rolling plus Tempering and Quenching to produce thickness and easily welded in 70-100mm as raw material
Connect high-strength and high-ductility steel plate.
Compared with prior art, the advantage of the invention is that：
Low-carbon, low-carbon-equivalent and low-crackle sensitive are realized on its composition of 690MPa grades of steel plate involved in the present invention,
C0.05-0.09%, carbon equivalent≤0.60, crack-sensitivity FACTOR P cm≤0.28 on the premise of armor plate strength is not sacrificed, makes steel
The weldability of plate has obtained notable optimization, it is easy to welding operation.According to the steel plate of the application technique productions, with good welds
Property on the basis of, with excellent high-strength and high-ductility, yield strength >=690MPa, tensile strength is between 770-940MPa, extension
At rate >=16%, 1/4 thickness and 1/2 thickness of -60 DEG C of lower steel plates Charpy-V impact power >=100J, the Z-direction contraction percentage of area >=35%,
It disclosure satisfy that and used under -60 DEG C of cryogenic conditions.
Brief description of the drawings
Fig. 1 is the micro-organization chart of embodiment of the present invention 70mm thickness steel plates；
Fig. 2 is the micro-organization chart of embodiment of the present invention 100mm thickness steel plates.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment 1-2：
Steel sheet manufacturing method involved by two embodiments：KR molten iron pretreatment-converter smelting-LF refining-RH vacuum takes off
Gas-continuous casting-continuous casting billet covering slow cooling-continuous casting billet inspection cleaning-heating strand-high-pressure water descaling-rolling-aligning-
The processing steps such as steel plate heap slow cooling-quenching-tempering, manufacture thickness difference 70（Embodiment 1）And 100mm（Embodiment 2）Height
The easy welding steel of strong high tenacity.
The concrete technology of above-mentioned heating, rolling and slow cooling stage is：370mm thickness continuous casting billets are heated to 1200 DEG C, guarantor
Warm 180min（Embodiment 1）Or it is heated to 1250 DEG C, insulation 150min（Embodiment 2）, continuous casting billet removed after coming out of the stove using water under high pressure
Squama；Then two-phase control rolling, 1100 DEG C of first stage start rolling temperature are carried out（Embodiment 1）Or 1150 DEG C（Embodiment 2）, middle base
Thickness 200mm, the average reduction ratio 15.5% of single pass；Second stage start rolling temperature is 860 DEG C, adds up percentage pass reduction 65%（It is real
Apply example 1）Or 850 DEG C of second stage start rolling temperature, add up percentage pass reduction 50%（Embodiment 2）, final finished steel plate thickness is
70mm（Embodiment 1）And 100mm（Embodiment 2）.Roll rear thermal straightening；Steel plate carries out offline heap slow cooling expansion hydrogen after thermal straightening, and heap delays
Cool time 72 hours（Embodiment 1）With 84 hours（Embodiment 2）.
Steel plate after the completion of slow cooling enters continuous oven and carries out Quenching Treatment, embodiment 1：910 DEG C of heating-up temperature, time inside furnace
2.2min/mm, uses quenching press water quenching.Embodiment 2：930 DEG C of heating-up temperature, time inside furnace 1.8min/mm uses quenching press water
Quench.Temper, embodiment 1 are proceeded in continuous oven to the steel plate for completing Quenching Treatment:660 DEG C of heating-up temperature, in stove
Time 4.0min/mm, embodiment 2：680 DEG C of heating-up temperature, time inside furnace 3.0min/mm.
Examples 1 and 2 correspondence steel plate chemical composition is shown in Table 1, and the mechanical property of steel plate is shown in Table 2, and the microscopic structure of steel plate is such as
Shown in Fig. 1 and Fig. 2.
The chemical composition of the anti-lamellar tearing steel plate of high-strength and high-ductility is easily welded in the Examples 1 and 2 of table 1（wt.%）
| Example | C | Si | Mn | P | S | Al | Nb | V | Ti | Cr | Ni | Mo | Cu | B | N | Ceq | Pcm |
| 1 | 0.07 | 0.28 | 1.10 | 0.008 | 0.002 | 0.031 | 0.019 | 0.045 | 0.013 | 0.44 | 1.11 | 0.46 | 0.24 | 0.0014 | 0.0046 | 0.53 | 0.23 |
| 2 | 0.08 | 0.23 | 1.21 | 0.009 | 0.001 | 0.032 | 0.021 | 0.048 | 0.016 | 0.44 | 1.19 | 0.48 | 0.35 | 0.0014 | 0.0036 | 0.58 | 0.25 |
Ceq=C+Mn/6+（Cr+Mo+V）/5+（Ni+Cu）/15
Pcm=C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5B
The mechanical property of the anti-lamellar tearing steel plate of high-strength and high-ductility is easily welded in the Examples 1 and 2 of table 2
The present invention by the Ultra-low carbon of original creation, low-carbon-equivalent and low-crackle sensitive composition design, by hardening and tempering process into
Work(has manufactured 70-100mm thickness and has easily welded the anti-lamellar tearing steel plate of high-strength and high-ductility.In the big thickness steel plate fields of 70-100mm,
Ultra-low carbon composition design is used to ensure steel plate weldability, the power such as -60 DEG C of ultralow-temperature flexibilities are realized using hardening and tempering process design
Learn performance.
Claims (2)
1. a kind of steel plate of the easy welding anti-lamellar tearing excellent performance of low temperature, it is characterised in that：The chemical composition quality of the steel plate
Percentage composition is-C 0.05-0.08%；Si 0.2-0.4%；Mn 0.9-1.3%；Al 0.02-0.04%；Nb 0.01-0.03%；V
0.03-0.05%；Cr 0.3-0.5%；Ni 1.0-1.4%；Mo 0.3-0.6%；Cu 0.2-0.6%；Ti 0.01-0.02%；B
0.001-0.002%；P≤0.015%；S≤0.003%；N≤0.007%；Surplus be Fe and inevitable impurity,Carbon equivalent≤
0.6；Weld crack sensitivity coefficient is Pcm≤0.28, Pcm=C+Si/30+ (Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+
5B；
The manufacture method of steel plate includes following processing step：
（1）High-purity molten steel, Ran Houtong are produced using the pretreatment of KR molten iron, converter smelting, LF refining, RH Fruit storages
Cross special thick continuous casting steel billet production technology and produce 370-450mm thickness continuous casting plate billets, covering stacking slow cooling expansion is carried out to continuous casting billet
Hydrogen processing, stacking slow cooling time >=120 hour；
（2）Continuous casting billet is heated to 1150-1250 DEG C, 150-180min is incubated, makes the abundant solid solution of the alloying element in steel, continuous casting
Base uses high-pressure water descaling after coming out of the stove；
（3）Continuous casting billet is subjected to two-phase control rolling, the first stage is rough rolling step, and start rolling temperature is in 1100-1180 DEG C, single pass
Average reduction ratio >=15%；Second stage is the finish rolling stage, and start rolling temperature is 840-900 DEG C, adds up percentage pass reduction >=40%；Roll
After carry out thermal straightening；
（4）Hydrogen processing, heap temperature retention time >=72 hour are expanded in the offline heap slow cooling of steel plate after thermal straightening；
（5）Quenching+tempering processing is carried out to the steel plate after slow cooling, quenching and tempering are carried out in continuous oven, and hardening heat is
910-930 DEG C, quenching time inside furnace 1.8-2.2min/mm；Temperature is 630-680 DEG C, tempering time inside furnace 3.0-
4.0min/mm, air cooling produces steel plate finished product after coming out of the stove.
2. the steel plate of the easy welding anti-lamellar tearing excellent performance of low temperature according to claim 1, it is characterised in that：The steel plate
Thickness be 70~100mm, more than yield strength 690MPa, 770~940MPa of tensile strength, elongation percentage >=16%, at -60 DEG C
At 1/4 thickness and 1/2 thickness of steel plate Charpy-V impact power >=100J, the Z-direction contraction percentage of area >=35% can take at -60 DEG C
Labour.
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| CN201610272420.4A CN105755369B (en) | 2016-04-28 | 2016-04-28 | A kind of steel plate of the easy welding anti-lamellar tearing excellent performance of low temperature and preparation method thereof |
| PCT/CN2016/102382 WO2017185668A1 (en) | 2016-04-28 | 2016-10-18 | Easy-to-weld steel plate with excellent lamellar tearing resistance at low temperature and preparation method therefor |
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| CN201610272420.4A CN105755369B (en) | 2016-04-28 | 2016-04-28 | A kind of steel plate of the easy welding anti-lamellar tearing excellent performance of low temperature and preparation method thereof |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105755369B (en) * | 2016-04-28 | 2017-07-18 | 江阴兴澄特种钢铁有限公司 | A kind of steel plate of the easy welding anti-lamellar tearing excellent performance of low temperature and preparation method thereof |
| CN106567011A (en) * | 2016-11-09 | 2017-04-19 | 江阴兴澄特种钢铁有限公司 | Easy-to-weld ultra-thick steel plate with high strength and high toughness suitable for minus 60 DEG C and manufacturing method thereof |
| CN107937802A (en) * | 2017-10-26 | 2018-04-20 | 江阴兴澄特种钢铁有限公司 | 60 80mm thickness low-crackle sensitives, easy weld-end fittings steel plate and its manufacture method used under a kind of cryogenic conditions |
| CN107904488B (en) * | 2017-11-06 | 2020-02-07 | 江阴兴澄特种钢铁有限公司 | Super-thick high-strength high-toughness lamellar tearing-resistant Q550 steel plate and manufacturing method thereof |
| CN108034885B (en) * | 2017-11-09 | 2020-05-15 | 江阴兴澄特种钢铁有限公司 | Steel plate for low-crack-sensitivity pipe fitting used under low-temperature condition and manufacturing method thereof |
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| CN109897928B (en) * | 2019-03-25 | 2021-01-05 | 江阴兴澄特种钢铁有限公司 | Manufacturing method for producing large-thickness steel plate with core part anti-lamellar tearing performance by continuous casting billet |
| 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 |
| CN111607748A (en) * | 2020-05-15 | 2020-09-01 | 江阴兴澄特种钢铁有限公司 | High-flatness large-thickness lamellar tearing resistant 780CF-Z35 hydroelectric steel and manufacturing method thereof |
| CN111926234B (en) * | 2020-08-12 | 2021-06-22 | 宝武集团鄂城钢铁有限公司 | Production method for producing super-thick high-strength steel plate for building with excellent thickness directivity based on continuous casting billet single frame |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014541A (en) * | 2012-12-21 | 2013-04-03 | 首钢总公司 | 690MPa thick steel plate for ocean engineering and manufacturing method of steel plate |
| CN103695803A (en) * | 2013-12-19 | 2014-04-02 | 江阴兴澄特种钢铁有限公司 | Low-carbon-equivalent low-temperature-usable high-thickness toothed rack steel and manufacturing method thereof |
| CN104357755A (en) * | 2014-10-17 | 2015-02-18 | 江阴兴澄特种钢铁有限公司 | Large-thickness and high-strength steel plate applicable to low temperature and manufacturing method thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3519966B2 (en) * | 1999-01-07 | 2004-04-19 | 新日本製鐵株式会社 | Ultra-high-strength linepipe excellent in low-temperature toughness and its manufacturing method |
| JP4477707B2 (en) * | 1999-03-10 | 2010-06-09 | 新日本製鐵株式会社 | Ultra high strength steel pipe excellent in low temperature toughness and method for producing the same |
| JP5116265B2 (en) * | 2006-07-13 | 2013-01-09 | 新日鐵住金ステンレス株式会社 | Austenitic stainless rolled steel sheet excellent in strength and ductility and method for producing the same |
| CN102011068B (en) * | 2010-12-13 | 2012-07-25 | 首钢总公司 | 800 MPa-grade low-yield-ratio structural steel plate and production method thereof |
| EP2725113B1 (en) * | 2011-06-24 | 2016-09-14 | Nippon Steel & Sumitomo Metal Corporation | Method for producing austenitic stainless steel and austenitic stainless steel material |
| JP5862592B2 (en) * | 2013-03-29 | 2016-02-16 | Ｊｆｅスチール株式会社 | High-tensile steel plate with excellent weld heat-affected zone toughness |
| CN103451562B (en) * | 2013-08-29 | 2015-09-23 | 舞阳钢铁有限责任公司 | Water power quenching and tempering type heavy thickness easily welds Z-direction high tensile steel plate and production method thereof |
| CN104131235B (en) * | 2014-07-22 | 2016-06-29 | 武汉钢铁(集团)公司 | LPG ship storage steel plate for tanks and production method thereof |
| CN105755369B (en) * | 2016-04-28 | 2017-07-18 | 江阴兴澄特种钢铁有限公司 | A kind of steel plate of the easy welding anti-lamellar tearing excellent performance of low temperature and preparation method thereof |
-
2016
- 2016-04-28 CN CN201610272420.4A patent/CN105755369B/en active Active
- 2016-10-18 WO PCT/CN2016/102382 patent/WO2017185668A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014541A (en) * | 2012-12-21 | 2013-04-03 | 首钢总公司 | 690MPa thick steel plate for ocean engineering and manufacturing method of steel plate |
| CN103695803A (en) * | 2013-12-19 | 2014-04-02 | 江阴兴澄特种钢铁有限公司 | Low-carbon-equivalent low-temperature-usable high-thickness toothed rack steel and manufacturing method thereof |
| CN104357755A (en) * | 2014-10-17 | 2015-02-18 | 江阴兴澄特种钢铁有限公司 | Large-thickness and high-strength steel plate applicable to low temperature and manufacturing method thereof |
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