CN106756536B - A kind of automobile-used low-alloy steel of resistance to hydrogen-type corrosion normalizing type movable tank and preparation method thereof - Google Patents
A kind of automobile-used low-alloy steel of resistance to hydrogen-type corrosion normalizing type movable tank and preparation method thereof Download PDFInfo
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- CN106756536B CN106756536B CN201611057155.4A CN201611057155A CN106756536B CN 106756536 B CN106756536 B CN 106756536B CN 201611057155 A CN201611057155 A CN 201611057155A CN 106756536 B CN106756536 B CN 106756536B
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- C21D8/0226—Hot 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention relates to the automobile-used low-alloy steel of the normalizing type of resistance to hydrogen-type corrosion movable tank, chemical component is C0.13~0.20%, Si0.20~0.50%, Mn1.20~1.70%, P≤0.030%, S≤0.010%, Ni0.10~0.45%, Nb0.010~0.050%, V0.010~0.20%, 30ppm≤N≤50ppm, H≤2ppm, 8≤w(V)/w(N)≤15, surplus is Fe and inevitable impurity.Preparation section: converter smelting → ladle furnace refining → vacuum processing → continuous casting → slab heating → controlled rolling → control cooling → slow cooling → flaw detection → normalizing → service check.Steel plate is delivered goods with normalized condition, integrates high-strength, high-ductility, low yield strength ratio, higher hydrogen resistant corrosive nature, under the premise of keeping excellent in mechanical performance, by the thickness control of steel plate in 6-25mm, most thin 6mm mitigates the weight of steel, improves the volume of mobile tank car.
Description
Technical field
Invention belongs to low-alloy high-strength special steel technical field, be related to a kind of high-strength and high ductility steel of resistance to hydrogen-type corrosion and its
Preparation method.
Background technique
The tensile strength for the automobile-used steel of movable tank that the country uses at present greatly be both less than 580MPa, low-temperature impact toughness value compared with
It is low, and yield tensile ratio is higher, causes tank body wall thickness larger, ratio of light weight to loading capacity is corresponding to be increased, and volume to weight ratio is small, delivers low efficiency.Another party
Face, the medium of the mobile general storage and transportation of tank car are liquefied gas, cryogenic liquid and permanent gas, and this requires it to have centainly resistance to
Corrosive nature.
The patent application of Patent No. CN101144138A discloses a kind of steel plate for low temperature pressure container and its producer
Method, -40 DEG C of side knock function of the steel reach 164J, but yield strength is less than 420MPa.
The patent application of Patent No. CN101871077A discloses a kind of manufacture of normalizing type high-strength pressure vessel steel
Method, the steel excellent in low temperature toughness, but its intensity rank is less than 570MPa.
The patent application of Patent No. CN1040777C discloses a kind of large sphere steel and heat treatment method, the invention steel
Obdurability is good, but yield tensile ratio is higher, but the condition of delivery is normalizing+tempering, makes that the production cost increases.
The patent application of Patent No. CN102719737A discloses a kind of yield strength 460MPa grades of normalizing high strength steels
Plate and its manufacturing method, the invention steel obdurability is good, production cost is low, but hydrogen resistant corrosive nature does not refer to.
In conclusion there are intensity deficiency, low-temperature impact toughness are poor, hydrogen resistant in existing transportable pressure vessel steel
The problems such as corrosive power difference and higher production cost.
Summary of the invention
For intensity existing for existing transportable pressure vessel steel is insufficient, low-temperature impact toughness is poor, the energy of resistance to hydrogen-type corrosion
The disadvantages of power difference and higher yield tensile ratio, the present invention provides a kind of high-strength and high ductility steel of resistance to hydrogen-type corrosion and preparation method thereof, of the invention
The automobile-used hardness of steel of movable tank is significantly higher than conventional mobile steels for pressure vessel use, collects high-strength, high-ductility, low yield strength ratio and excellent resistance to
Hydrogen-type corrosion performance is integrated, and has the characteristics that production strong operability, at low cost, production are stablized.
The present invention solves the above problems used technical solution are as follows: a kind of automobile-used low conjunction of the normalizing type of resistance to hydrogen-type corrosion movable tank
Jin Gang, steel plate with a thickness of 6~25mm, chemical component is C:0.13~0.20% by mass percentage, Si:0.20~
0.50%, Mn:1.20~1.70%, P≤0.030%, S≤0.010%, Ni:0.10~0.45%, Nb:0.010~0.050%, V:
0.010~0.20%, 30ppm≤N≤50ppm, H≤2ppm, 8≤w(V)/ w(N)≤15, surplus be Fe and inevitably it is miscellaneous
Matter.
The application steel plate is normalizing type steel plate, and metallographic structure after steel plate normalizing is ferrite+pearlite, yield strength >=
420MPa, tensile strength >=620MPa, elongation percentage >=25%, yield tensile ratio≤0.80, -46 DEG C of KV of base material2>=60J, by GB/T
8650-2006 " pipe line steel and pressure vessel steel resistance against hydrogen cracking assessment method " standard is tested in the hydrogen sulfide corrosion resistant of solution A
Crack length rate CLR≤4%, crack thickness rate CTR≤1%, crack-sensitivity rate CSR≤0.5%.
Foregoing invention steel plate is prepared, is followed the steps below, converter smelting → ladle furnace refining → vacuum processing → company
Casting → slab heating → controlled rolling → control cooling → slow cooling → flaw detection → normalizing → service check, specific requirement are as follows:
Molten iron is smelted through 150t top and bottom complex blowing oxygen coverter, then using ladle furnace refining and Fruit storage, then to
Molten steel feeds Ca line and carries out denaturation treatment to field trash, smelts after soft blow 10 minutes or more into high-purity molten steel, is protected using overall process
Shield casting, soft reduction technique are in conticaster upper at 150mm or the slab of the above thickness, casting blank stacking slow cooling.
Slab is heated to 1140~1240 DEG C, time inside furnace is slab plate thickness (cm) × 8~12min/cm, using two ranks
Section rolling, 1020~1090 DEG C of first stage roughing start rolling temperature, rear three reductions in pass >=40mm add up reduction ratio >=70%,
850~930 DEG C of second stage finish rolling start rolling temperature, finishing temperature are 800~870 DEG C, 6~25mm thick steel plate are rolled into, after rolling
It is controlled and is cooled down using ACC, final cooling temperature is 540~640 DEG C, stacking slow cooling to room temperature, carries out 880~920 DEG C after flaw detection is qualified
Normalized treatment is dispatched from the factory after performance is qualified.
Compared with the prior art, the advantages of the present invention are as follows: the present invention is using the designs such as solution strengthening, fine grain Strengthening and Toughening reason
It reads, controls the compound adding technique of a variety of alloys, continuous casting billet expansion hydrogen processing, Controlled Rolling And Controlled Cooling etc., hand over steel plate with normalized condition
Goods integrates high-strength, high-ductility, low yield strength ratio, higher hydrogen resistant corrosive nature, under the premise of keeping excellent in mechanical performance,
By the thickness control of steel plate in 6-25mm, most thin is 6mm, alleviates the weight of steel, improves the volume of mobile tank car.Steel plate is certainly
The features such as body, which has, to be had excellent performance, with short production cycle, at low cost, the addition of main alloy element of the invention is based on following original
Reason:
C: one of indispensable raising intensity element in steel deteriorates if its too high levels can significantly improve the Pcm value of steel
Its welding performance, while reducing welding point low-temperature flexibility.In order to guarantee that it is preferable that it has while improving invention hardness of steel
Low-temperature flexibility, therefore steel C of the present invention be 0.13~0.20%.
Si: the intensity of steel is improved with solution strengthening form, but too high levels can aggravate impurity element in the segregation of crystal boundary, dislike
Change the impact toughness of welded joint of steel.Therefore steel Si of the present invention is 0.20~0.50%.
Mn: can significantly improve the intensity of steel, can also reduce the ductile-brittle transition temperature of steel, improve the low-temperature flexibility of steel.But contain
The excessively high center segregation that can aggravate slab is measured, so that slab center is easily formed strip and is mingled with MnS, to base material performance and sweating heat shadow
Ringing area has serious adverse effect.Therefore steel Mn of the present invention is 1.20~1.70%.
P: if its content is high, increase the cold brittleness of steel, the low-temperature impact toughness of steel is made to degenerate.Therefore, steel P of the present invention≤
0.030%。
S: having very big harm to the low-temperature impact toughness of steel, if its content is high, is easy to generate a large amount of low melting point vulcanization
Object, and the lower eutectic of fusing point is formed with matrix, it is formed and is enriched in grain boundaries, generated welding and reheat cracking, therefore, this hair
Bright steel S≤0.010%.
Ni: the intensity of steel plate can be made to improve, especially low-temperature flexibility, also can reduce the slab table because of caused by the addition of Cu
Face crackle tendency.But Ni is expensive, and additional amount can excessively significantly improve the production cost of steel, therefore steel Ni of the present invention is 0.10
~0.45%.
Nb: can promote low temperature phase change to organize the formation of, and Nb(C, N are generated in conjunction with C and N), in dislocation, sub boundary and crystal boundary
Place is a large amount of to be precipitated, and strong inhibition is played to the recovery and recrystallization of deformed austenite, makes crystal grain refinement, improves the matrix of steel
Intensity.But too high levels reduce the plasticity of steel and toughness, while cost increase.Therefore, steel Nb of the present invention be 0.010~
0.050%。
V: one of most effective intensified element, by forming V(C, N) Precipitation in the ferrite of austenite grain boundary,
It can inhibit the recrystallization of austenite during the rolling process and crystal grain is prevented to grow up, to play fining ferrite grains, improve steel
Intensity and toughness and weldability.On the other hand, because V and the N affinity in steel are stronger, " freedom " N can be substantially reduced in steel
Content avoids the strain-aging of steel.If too high levels, precipitate quantity and size increase, and reduce so as to cause the toughness of steel,
Therefore, the additive amount of V is 0.010~0.20% in steel of the present invention.
N: V(C, N are formed in conjunction with V) compound, improves its Precipitation Temperature and driving force, promotes V from solid solution state to precipitation
Phase transition makes the V(C, N of the VN being precipitated or rich nitrogen) particle size and spacing be obviously reduced, to give full play to the precipitation strength of V
Effect.If too high levels can deteriorate the impact flexibility of steel, therefore, steel 30ppm≤N≤50ppm of the present invention.
H: in wet H2Under S environment, the hydrogen atom for corroding generation is spread into steel, under the action of Hydrogen Vapor Pressure, different layers
Adjacent hydrogen blister crackle on face is connected with each other, to form the underbead crack of step-like features, can also expand to surface sometimes.
Therefore, H≤2ppm in steel of the present invention, and continuous casting billet is carried out to expand hydrogen processing.
The present invention effectively inhibits austenite crystal grain length by N content in addition trace alloying element Nb, V, control steel
Greatly, by the big pressure of high temperature, fining austenite grains finally obtain the tiny tissue of crystal grain, by refined crystalline strengthening and tough are turned into
With the intensity and low-temperature flexibility for improving steel；The center segregation and H content of strict control slab are to improve its hydrogen resistant corrosive power；It adopts
With two-phase control rolling, 1020~1090 DEG C of the start rolling temperature of first segment adds up reduction ratio >=70%, it is therefore an objective to make the austenite of steel
Crystal grain refinement；Second stage Unhydrated cement controlled rolling, 850~930 DEG C of start rolling temperature, finishing temperature is 800~870 DEG C,
Control 540~640 DEG C of cold final cooling temperature, it is therefore an objective to by controlled rolling thinning microstructure, generate a large amount of dislocations, increase the forming core position of precipitated phase
It sets, promotes precipitated phase to be precipitated, improve the intensity of steel while reducing yield tensile ratio.Normalized treatment only need to be carried out after rolling, can be obtained
Delivery cycle has been effectively ensured in quality plate, reduces production cost.
Detailed description of the invention
Fig. 1 is the metallographic structure figure of light plate of the embodiment of the present invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
The chemical component of steel plate of the embodiment of the present invention meets: C:0.13~0.20%, Si:0.20~0.50%, Mn:1.20
~1.70%, P≤0.030%, S≤0.010%, Ni:0.10~0.45%, Nb:0.010~0.050%, V:0.010~0.20%,
30ppm≤N≤50ppm, H≤2ppm, 8≤w(V)/ w(N)≤15, surplus is Fe and inevitable impurity.
The chemical component of specific embodiment and comparative example is shown in Table 1.
1 embodiment and comparative example chemical component (wt%) of table
Steel plate preparation process includes: that molten iron pre-processes, pneumatic steelmaking, carries out RH Fruit storage after LF refining, uses
Molding casting is at 150mm thickness slab.150mm thickness slab is heated to 1140~1240 DEG C, time inside furnace is slab plate thickness (cm)
× 8~12min/cm.Then use two-phase control rolling, 1020~1090 DEG C of first stage roughing start rolling temperature, rear three passages pressure
Lower amount >=40mm, adds up reduction ratio >=70%, 850~930 DEG C of second stage finish rolling start rolling temperature, and finishing temperature is 800~870
DEG C, it is rolled into 6~25mm thick steel plate.It is controlled and is cooled down using ACC, final cooling temperature is 540~640 DEG C, stacking slow cooling to room temperature.Tool
Body technology parameter is shown in Table 2.
2 embodiment and comparative example rolling technological parameter of table
Steel plate is sampled and carries out mechanical property and tissue detection, the results are shown in Table 3.
3 embodiment and comparative example mechanical property of steel plate result of table
It is all satisfied yield strength >=420MPa in embodiment, tensile strength >=620MPa, elongation percentage >=25%, yield tensile ratio≤
0.80, -46 DEG C of KV2>=60J, and tensile strength is 590MPa in comparative example, is unsatisfactory for Rm >=640MPa requirement, and toughness value is rich
Allowance is little.
Steel of the embodiment of the present invention and the resistance against hydrogen cracking index results of compared steel are shown in Table 4.
4 embodiment and comparative example steel plate resistance against hydrogen cracking test result of table
Test result value is smaller, illustrates that the hydrogen induced cracking resistance of material can be better.As seen from the above table, steel of the present invention has good
Good hydrogen induced cracking resistance energy.
From embodiment result it is found that steel of the present invention yield strength >=420MPa, tensile strength >=620MPa, elongation percentage >=
25%, yield tensile ratio≤0.80, -46 DEG C of KV of base material2>=60J, resistance against hydrogen cracking test result are rated I.Fig. 1 show embodiment 2
The organization chart of middle 20mm thick steel plate is organized as ferrite+pearlite, and it is preferable tough which not only ensure that steel has
Property, also there is lower yield tensile ratio.Above data shows that steel of the present invention has excellent mechanical property, especially low-temperature flexibility,
There is good hydrogen resistant corrosive nature simultaneously.
In addition to the implementation, all to use equivalent transformation or equivalent replacement the invention also includes there is an other embodiments
The technical solution that mode is formed should all be fallen within the scope of the hereto appended claims.
Claims (3)
1. a kind of automobile-used low-alloy steel of the normalizing type of resistance to hydrogen-type corrosion movable tank, it is characterised in that: steel plate with a thickness of 6~25mm, change
Study point is C:0.13~0.20% by mass percentage, Si:0.20~0.50%, Mn:1.20~1.70%, P≤
0.030%, S≤0.010%, Ni:0.10~0.45%, Nb:0.010~0.050%, V:0.010~0.05%, 30ppm≤N
≤ 50ppm, H≤2ppm, 8≤w (V)/w (N)≤15, surplus are Fe and inevitable impurity.
2. the automobile-used low-alloy steel of the normalizing type of resistance to hydrogen-type corrosion movable tank according to claim 1, it is characterised in that: steel plate uses
Normalizing process is heat-treated, yield strength >=420MPa, tensile strength >=620MPa, elongation percentage >=25%, and yield tensile ratio≤
0.80, -46 DEG C of KV of base material2>=60J, by GB/T 8650-2006 " pipe line steel and pressure vessel steel resistance against hydrogen cracking assessment method "
Standard tests crack length rate CLR≤4%, crack thickness rate CTR≤1%, crack-sensitivity rate in the hydrogen sulfide corrosion resistant of solution A
CSR≤0.5%.
3. a kind of preparation method of low-alloy steel described in claim 1, it is characterised in that: including process: converter smelting → ladle
Furnace refining → vacuum processing → continuous casting → slab heating → controlled rolling → control cooling → slow cooling → flaw detection → normalizing → performance
It examines, specific requirement is as follows:
(1) molten iron is smelted through 150t top and bottom complex blowing oxygen coverter, then uses ladle furnace refining and Fruit storage, then to steel
Water feeds Ca line and carries out denaturation treatment to field trash, smelts after soft blow 10 minutes or more at high-purity molten steel, using total process protective
Casting, soft reduction technique are in conticaster upper at 150mm or the slab of the above thickness, casting blank stacking slow cooling；
(2) slab is heated to 1140~1240 DEG C, time inside furnace is slab plate thickness (cm) × 8~12min/cm, using two ranks
Section rolling, 1020~1090 DEG C of first stage roughing start rolling temperature, rear three reductions in pass >=40mm, accumulative reduction ratio >=
70%, 850~930 DEG C of second stage finish rolling start rolling temperature, finishing temperature is 800~870 DEG C, is rolled into 6~25mm thick steel plate,
Using ACC control cooling after rolling, final cooling temperature is 540~640 DEG C, stacking slow cooling to room temperature, carry out 880 after flaw detection is qualified~
920 DEG C of normalized treatments are dispatched from the factory after performance is qualified.
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| CN201611057155.4A CN106756536B (en) | 2016-11-26 | 2016-11-26 | A kind of automobile-used low-alloy steel of resistance to hydrogen-type corrosion normalizing type movable tank and preparation method thereof |
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| CN201611057155.4A CN106756536B (en) | 2016-11-26 | 2016-11-26 | A kind of automobile-used low-alloy steel of resistance to hydrogen-type corrosion normalizing type movable tank and preparation method thereof |
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| CN107338392A (en) * | 2017-06-08 | 2017-11-10 | 江阴兴澄特种钢铁有限公司 | High-strength low-yield ratio easily welds moving pressure container steel plate and its manufacture method |
| CN107974612B (en) * | 2017-10-26 | 2020-05-22 | 江阴兴澄特种钢铁有限公司 | High-strength and high-toughness steel plate for SSCC (single strand ceramic) resistant spherical tank and manufacturing method thereof |
| CN108411196B (en) * | 2018-03-27 | 2019-11-26 | 武汉钢铁有限公司 | Tensile strength is 680MPa grades of large-scale mobile steelss for pressure vessel use and production method |
| CN109338215B (en) * | 2018-10-15 | 2020-10-30 | 江阴兴澄特种钢铁有限公司 | High-strength steel plate with thickness of 8-25 mm and low yield ratio for tank car and manufacturing method thereof |
| CN110306112A (en) * | 2019-07-17 | 2019-10-08 | 张家港宏昌钢板有限公司 | A kind of X65 grades of pipe line steel and its manufacturing method |
| CN110387503A (en) * | 2019-07-23 | 2019-10-29 | 舞阳钢铁有限责任公司 | A kind of low-alloy SA622GrB steel plate and production method |
| CN111926253B (en) * | 2020-07-31 | 2021-10-22 | 五矿营口中板有限责任公司 | Hydrogen sulfide corrosion resistant high-strength toughness normalized steel and manufacturing method thereof |
| CN113234993B (en) * | 2021-04-01 | 2022-09-30 | 江阴兴澄特种钢铁有限公司 | Q370R steel plate with excellent wet hydrogen sulfide corrosion resistance and manufacturing method thereof |
| CN115852242B (en) * | 2021-09-24 | 2024-03-08 | 宝山钢铁股份有限公司 | High-temperature high-pressure hydrogen corrosion-resistant thick steel plate and manufacturing method thereof |
| CN115369328B (en) * | 2022-09-22 | 2024-01-23 | 马鞍山钢铁股份有限公司 | Low-temperature-resistant rolled steel and production method thereof |
| CN115558865A (en) * | 2022-10-21 | 2023-01-03 | 燕山大学 | Hydrogen corrosion resistant normalized high-strength and high-toughness container steel plate for mobile tank car and manufacturing method thereof |
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| CN105755375A (en) * | 2016-04-19 | 2016-07-13 | 江阴兴澄特种钢铁有限公司 | Low-compression-ratio high-performance ultra-thick steel plate produced by continuous casting billet and manufacturing method of steel plate |
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| CN103060685A (en) * | 2013-01-08 | 2013-04-24 | 舞阳钢铁有限责任公司 | 17MnNiVNbDR steel plate for tank car, and its production method |
| CN105755375A (en) * | 2016-04-19 | 2016-07-13 | 江阴兴澄特种钢铁有限公司 | Low-compression-ratio high-performance ultra-thick steel plate produced by continuous casting billet and manufacturing method of steel plate |
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