CN106319347B - A kind of silicon vanadium steel plate and manufacturing method improving ballistic performance - Google Patents
A kind of silicon vanadium steel plate and manufacturing method improving ballistic performance Download PDFInfo
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- CN106319347B CN106319347B CN201610949408.2A CN201610949408A CN106319347B CN 106319347 B CN106319347 B CN 106319347B CN 201610949408 A CN201610949408 A CN 201610949408A CN 106319347 B CN106319347 B CN 106319347B
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/32—Soft annealing, e.g. spheroidising
-
- 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
- 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
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- 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
- C21D2211/001—Austenite
-
- 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
- C21D2211/008—Martensite
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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 Sheet Steel (AREA)
Abstract
A kind of silicon vanadium steel plate and manufacturing method improving ballistic performance, the ballistic performance refers to the ability that silicon vanadium steel plate resists bullet shooting or fragmentation, and stability and light-weighted real requirement are adapted to, the silicon vanadium steel plate includes following chemical element and its weight content: C:0.28~0.43%；Si:0.3~2.0%；Mn:0.3~1.0%；Cr:0.3~1.5%；Ni:0.3~3.0%；Mo:0.1~0.6%；V:0.03~0.12%；Inevitable impurity≤0.03%；Fe is surplus.
Description
Technical field
The present invention relates to armour plate technology, especially a kind of silicon vanadium steel plate and manufacturing method for improving ballistic performance, institute
It states ballistic performance and refers to the ability that silicon vanadium steel plate resists bullet shooting or fragmentation, and adapt to stability and light-weighted practical want
It asks, the silicon vanadium steel plate, which refers to, not only to have been contained silicon but also contained vanadium in steel plate, wherein vanadium can play the precipitation strength of MC type carbide
Effect and/or the refined crystalline strengthening for hindering crystal grain to grow up effect, the MC type refer to what metal or metalloid element and carbon were combined into
Crystal structure.The silicon vanadium steel plate that the present invention improves ballistic performance can be respectively obtained anti-by the restriction to carbon content different range
High performance ballistic steel plate of the tensile strength not less than 1700MPa and tensile strength are not less than the high performance ballistic steel plate of 1900MPa.
Background technique
Armour plate is mainly used for the protection of the facilities such as vehicle, house, sales counter, furniture and the helmet, shield, flak jackets are inserted
The individual protections such as plate field, for resisting the damage of bullet or fragmentation for personnel or facilities and equipment.People are for anti-in recent years
Stability and the lightweight requirements for playing steel plate are higher and higher.When the intensity of steel plate and thickness reach certain level, just have anti-
Resilience energy power.Armour plate improves intensity, is added suitable other usually using steel alloy, the main solution strengthening by carbon
Alloying element improves the harden ability of steel, forms carbide and generates precipitation strength and refined crystalline strengthening and other effects.Currently, for shellproof
Unimach component system mainly includes CrNiMo system, MnB system etc., generally uses smelting, continuous casting, hot rolling, quenching, tempering etc.
Process production, also there is the case where rolled directly uses.For example, 105088090 A of publication number CN, discloses a kind of conjunction
Golden system is the CrNiMoTiB system bullet proof steel containing Cu, and after being quenched tempering, the cloth hardness of steel plate can reach 600HB grades；
SSAB company ARMOX series armour has used CrNiMo system, different carbon content steel plates are quenched+tempering after hardness reach
280-640HB；SSAB company DOMEX series has used the MnCrB alloy system of high-cleanness, high, the conjunction that wherein phosphorus content is 0.3%
Golden steel hardness reaches 500HB；Publication number CN 103993235A, discloses a kind of manufacturing method of high-strength hot-rolled armor plate,
Alloy system uses SiMnCrNbTiB, does not contain Ni in ingredient, hardness reaches 500HB after steel plate is quenched tempering.
AISI4330 and AISI4340 steel is the classical unimach of comparison, and it is 0.3% and 0.4% that carbon content, which has been respectively adopted,
CrNiMo ingredient system, subsequent multiple trades mark are all to improve on this basis.The inventors discovered that in the shellproof of the prior art
In steel plate, alloying component does not include vanadium usually, or is only classified as microelement mentioning vanadium yet, both without effect
The explanation of mechanism is also without the regulation of content range.But the present inventor deliberately introduces in high performance ballistic steel plate technical research
Vanadium, so as to complete the present invention.
Summary of the invention
The present invention is in view of the deficiencies in the prior art or insufficient, provide a kind of silicon vanadium steel plate for improving ballistic performance and
Manufacturing method, the ballistic performance refers to the ability that silicon vanadium steel plate resists bullet shooting or fragmentation, and adapts to stability and light weight
The real requirement of change, the silicon vanadium steel plate, which refers to, not only to have been contained silicon but also had contained vanadium in steel plate, wherein vanadium can play MC type carbide
Precipitation strength effect and/or the refined crystalline strengthening effect that hinders crystal grain to grow up, the MC type refer to metal or metalloid element with
The crystal structure that carbon is combined into.The silicon vanadium steel plate that the present invention improves ballistic performance can by the restriction to carbon content different range
It respectively obtains high performance ballistic steel plate of the tensile strength not less than 1700MPa and tensile strength is not less than the high-performance of 1900MPa
Armour plate.
Technical scheme is as follows:
A kind of silicon vanadium steel plate improving ballistic performance, which is characterized in that including following chemical element and its weight content: C:
0.28~0.43%；Si:0.3~2.0%；Mn:0.3~1.0%；Cr:0.3~1.5%；Ni:0.3~3.0%；Mo:0.1~
0.6%；V:0.03~0.12%；Inevitable impurity≤0.03%；Fe is surplus.
The refined crystalline strengthening that wherein vanadium can play the role of the precipitation strength of MC type carbide and/or crystal grain is hindered to grow up is made
With the MC type refers to the crystal structure that metal or metalloid element and carbon are combined into.
Wherein C is 0.28~0.35%, tensile strength >=1700MPa of the silicon vanadium steel plate.
Wherein C is tensile strength >=1900MPa of the silicon vanadium steel plate greater than 0.35~0.43%.
It wherein include P and S, P≤0.010%, S≤0.005% in inevitable impurity.
The microstructure of the silicon vanadium steel plate is martensite+a small amount of retained austenite, or is tempered martensite+a small amount of residual
Remaining austenite, volume fraction≤5% of a small amount of retained austenite.
A kind of silicon vanadium steel board fabrication method improving ballistic performance, which is characterized in that successively comprising steps of (1) smelts,
(2) it casts, the heating of (3) slab, (4) rolling, (5) steel plate quenching, the tempering of (6) steel plate；The raw material of the smelting is according to following heavy
Amount formula is prepared: C:0.28~0.43%；Si:0.3~2.0%；Mn:0.3~1.0%；Cr:0.3~1.5%；Ni:0.3~
3.0%；Mo:0.1~0.6%；V:0.03~0.12%；Inevitable impurity≤0.03%；Fe is surplus.
Described smelt includes being smelted using converter or electric furnace, using LF ladle refining furnace, RH vacuum degassing furnace
Or VD vacuum degassing furnace is refined；The casting uses continuous casting or molding；Slab heating include hot-loading and hot-conveying mode or
The heating temperature of person's cold charge mode, the slab heating is 1100~1250 DEG C, and the time in furnace is 120~330min.
In the rolling, finishing temperature be 800~1000 DEG C, after rolling control cooling, eventually cold or coiling temperature be 300~
700℃；Heating temperature is 850~950 DEG C in the steel plate quenching, and soaking time is plate thickness × (2~3) min/mm；The steel
Plate tempering temperature is 150~300 DEG C, and soaking time is plate thickness × (3~5) min/mm.
The rolling includes spheroidizing, through spheroidizing treated the silicon vanadium steel plate plasticity with higher with
In the production of helmet class deep-draw part.
The technology of the present invention effect is as follows: the present invention it is a kind of improve ballistic performance silicon vanadium steel plate, by introduce vanadium and
Compared with the combination of high silicon content, not only improved ballistic performance (such as tensile strength not less than 1700MPa) and adapted to stability with
Light-weighted real requirement.Wherein vanadium (V:0.03~0.12%) can play the role of MC type carbide precipitation strength and/or
The refined crystalline strengthening effect for hindering crystal grain to grow up, the MC type refer to the crystal structure that metal or metalloid element and carbon are combined into.
Content of vanadium be more than after 0.12% effect it is unobvious, particularly, the bulky grain carbonitride easy to form when content is higher than 0.15%
Reduce plasticity and toughness.Therefore, V element content is controlled 0.03~0.12% in the present invention.Pass through the limit to carbon content different range
It is fixed, two kinds of strength steels can be obtained: it is shellproof not less than 1700MPa to obtain tensile strength when C content is 0.28~0.35%
Steel plate obtains the armour plate that tensile strength is not less than 1900MPa when C content is 0.35~0.43%.
Detailed description of the invention
Fig. 1 shows the shellproof silicon vanadium steel plate that C content is 0.3% 500 times of metallographic structure under an optical microscope.From figure
1 metallographic structure it can be seen that steel plate be quenched+lonneal processing after, obtain tiny lath martensite tissue.
Fig. 2 shows the shellproof silicon vanadium steel plate that C content is 0.4% 500 times of metallographic structure under an optical microscope.From figure
2 metallographic structure it can be seen that steel plate be quenched+lonneal processing after, obtain tiny lath martensite tissue.
Specific embodiment
Below with reference to embodiment and attached drawing (Fig. 1-Fig. 2), the present invention will be described.
Product and the method for implementing a kind of silicon vanadium steel plate for improving ballistic performance of the present invention are as follows: passing through 180 tons of converter smeltings
Refining, LF furnace and the refining of RH furnace, chemical component such as table 1.It is cast using continuous casting mode.Slab hot charging, heating temperature 1200
DEG C, the time in furnace is 180min, and control finishing temperature control is 850~900 DEG C, is rolled rear air-cooled.Steel plate quenching heating temperature is
850~950 DEG C, soaking time is plate thickness × (2~3) min/mm, and steel plate tempering temperature is 150~220 DEG C, and soaking time is plate
Thickness × (3~5) min/mm, specific process parameter such as table 2.Table 3 is data of mechanical, should the result shows that, invention steel warp
After 2 parameter processing of table, the hardness of F601 steel reaches HB540, higher than the HB500 being widely used at present, the hardness of F602 steel again compared with
F601 steel, which significantly improves, reaches HB580, it was found that, invention steel plasticity and toughness levels are slightly above other of same intensity rank
Steel grade, the refined crystalline strengthening effect of carbide and reasonable parameter selection play weight important function.Table 4 is target test data, than
Compared with discovery, under identical bullet target body system, the thickness of F601 steel and other hardness are close for the steel plate of HB500 rank, slightly reduce,
And the thickness of F602 steel can be significantly reduced, and show invention steel with better bulletproof performance and lightweight potentiality.
Table 1, the chemical component (mass percent) of invention steel
| Steel | C | Si | Mn | P | S | Cr | Ni | Mo | V | Al |
| F601 | 0.30 | 0.98 | 0.55 | 0.012 | 0.005 | 1.00 | 1.00 | 0.16 | 0.06 | 0.03 |
| F602 | 0.40 | 1.00 | 0.57 | 0.014 | 0.002 | 1.01 | 0.98 | 0.18 | 0.07 | 0.05 |
Table 2, technological parameter
Table 3, Mechanics Performance Testing
Note: sampling direction is laterally.Two sample means are stretched as, are impacted for three sample means.Impact sample
Size 5mm × 10mm × 55mm.
Table 4, target examination
A kind of silicon vanadium steel plate improving ballistic performance, which is characterized in that including following chemical element and its weight content: C:
0.28~0.43%；Si:0.3~2.0%；Mn:0.3~1.0%；Cr:0.3~1.5%；Ni:0.3~3.0%；Mo:0.1~
0.6%；V:0.03~0.12%；Inevitable impurity≤0.03%；Fe is surplus.A kind of silicon vanadium steel improving ballistic performance
Board fabrication method, which is characterized in that successively comprising steps of (1) smelts, (2) casting, the heating of (3) slab, (4) rolling, (5) steel
Plate quenching, the tempering of (6) steel plate.
Chemical element in a kind of silicon vanadium steel plate (i.e. high performance ballistic steel plate) improving ballistic performance of the present invention
Design principle are as follows:
Carbon: C plays decisive role as main gap solution strengthening factor, to the intensity of steel, in addition, carbon is being tempered
Carbide is formed in the process plays the role of precipitation strength.The excessively high weldability that will reduce steel of carbon content, the present invention in carbon content control
System is 0.28~0.43%.
Silicon: Si plays solution strengthening effect in steel, improves ferrite intensity, and in addition silicon inhibits transition in drawing process
Type carbide changes to cementite, can properly increase tempering temperature and improve intensity of the plasticity and toughness of steel without reducing steel.This hair
Bright middle silicone content control is 0.3~2.0%；
Manganese: Mn is to expand austenitic area element, can play the role of solution strengthening and improve the harden ability of steel, but Mn is first
The excessively high plasticity and toughness for be easy to causeing segregation, reducing steel of cellulose content, Mn content should be controlled 0.3~1.0%.
Aluminium: Al is used as deoxidier, and excessively high Al content be easy to cause coarse alumina inclusion, Al member in the present invention
Cellulose content is 0.02~0.05%.
Chromium: Cr can effectively improve the harden ability of steel and prevent high temperature surface oxidation, and Cr content should control in the present invention
0.3~1.5%.
Nickel: Ni is austenite stabilizer element, while the plasticity and toughness of steel can be improved, Ni constituent content in the present invention
Control is 0.3~3.0%.
Molybdenum: Mo effectively improves the harden ability of steel, also reinforcing crystal boundary, reduces temper brittleness, Mo constituent content control in the present invention
System is 0.1~0.6%.
Vanadium: V can improve the harden ability of steel, and MC type carbide can be precipitated in steel and play the role of precipitation strength, when reheating
It hinders crystal grain to grow up and plays Grain refinement, but the bulky grain carbonitride reduction easy to form when content is higher than 0.15%
Plasticity and toughness.The control of V element content is 0.03~0.12% in the present invention.
In addition, being inevitably present the impurity element based on O, N, P, S, wherein P in armour of the present invention
≤ 0.010%, S≤0.005%.
The prototype micro tissue of armour plate of the present invention is rolled or annealed structure, including spheroidizing state group
It knits, the microstructure after being quenched tempering is martensite+a small amount of retained austenite, tempered martensite+a small amount of residual austenite
Body.Armour plate of the present invention, the retained austenite volume fraction are lower than 5%.The present invention is high performance ballistic steel plate
Manufacturing method is proposed, manufacturing method armour plate obtained stability with higher and preferable protective are passed through
Energy.
It is hereby stated that described above facilitate those skilled in the art understand that the invention, but not limit the present invention
The protection scope of creation.Any equivalent replacement described above, modification are improved without disengaging the invention substantive content
And/or delete numerous conform to the principle of simplicity and the implementation that carries out, each fall within the protection scope of the invention.
Claims (8)
1. a kind of silicon vanadium steel plate for improving ballistic performance, which is characterized in that including following chemical element and its weight content: C:
0.28~0.43%；Si:0.3~2.0%；Mn:0.3~1.0%；Cr:0.3~1.5%；Ni:0.3~3.0%；Mo:0.1~
0.6%；V:0.03~0.12%；Al:0.02~0.05%；Inevitable impurity≤0.03%；Fe is surplus；
The wherein refined crystalline strengthening effect that vanadium can play the role of the precipitation strength of MC type carbide and/or crystal grain is hindered to grow up, institute
It states MC type and refers to the crystal structure that metal or metalloid element and carbon are combined into；
The microstructure of the silicon vanadium steel plate is martensite+a small amount of retained austenite, Huo Zhewei, tempered martensite+a small amount of remaining
Austenite, volume fraction≤5% of a small amount of retained austenite.
2. the silicon vanadium steel plate according to claim 1 for improving ballistic performance, wherein C is 0.28~0.35%, the silicon vanadium
Tensile strength >=1700MPa of steel plate.
3. it is according to claim 1 improve ballistic performance silicon vanadium steel plate, wherein C be greater than 0.35~0.43%, it is described
Tensile strength >=1900MPa of silicon vanadium steel plate.
4. the silicon vanadium steel plate according to claim 1 for improving ballistic performance, wherein include P and S in inevitable impurity,
P≤0.010%, S≤0.005%.
5. a kind of silicon vanadium steel board fabrication method for improving ballistic performance, which is characterized in that successively comprising steps of (1) smelts, (2)
Casting, the heating of (3) slab, (4) rolling, (5) steel plate quenching, the tempering of (6) steel plate；The raw material of the smelting is matched according to following weight
It prepares side: C:0.28~0.43%；Si:0.3~2.0%；Mn:0.3~1.0%；Cr:0.3~1.5%；Ni:0.3~
3.0%；Mo:0.1~0.6%；V:0.03~0.12%；Al:0.02~0.05%；Inevitable impurity≤0.03%；Fe
For surplus；
The wherein refined crystalline strengthening effect that vanadium can play the role of the precipitation strength of MC type carbide and/or crystal grain is hindered to grow up, institute
It states MC type and refers to the crystal structure that metal or metalloid element and carbon are combined into；
The microstructure of the silicon vanadium steel plate is martensite+a small amount of retained austenite, Huo Zhewei, tempered martensite+a small amount of remaining
Austenite, volume fraction≤5% of a small amount of retained austenite.
6. the silicon vanadium steel board fabrication method according to claim 5 for improving ballistic performance, which is characterized in that the smelting packet
It includes and is smelted using converter or electric furnace, carried out using LF ladle refining furnace, RH vacuum degassing furnace or VD vacuum degassing furnace
Refining；The casting uses continuous casting or molding；The slab heating includes hot-loading and hot-conveying mode or cold charge mode, the slab
The heating temperature of heating is 1100~1250 DEG C, and the time in furnace is 120~330min.
7. the silicon vanadium steel board fabrication method according to claim 5 for improving ballistic performance, which is characterized in that the rolling
In, finishing temperature is 800~1000 DEG C, and cooling is controlled after rolling, and cold or coiling temperature is 300~700 DEG C eventually；The steel plate quenching
Middle heating temperature is 850~950 DEG C, and soaking time is plate thickness × (2~3) min/mm；The steel plate tempering temperature be 150~
300 DEG C, soaking time is plate thickness × (3~5) min/mm.
8. the silicon vanadium steel board fabrication method according to claim 5 for improving ballistic performance, which is characterized in that the rolling packet
Spheroidizing is included, through spheroidizing treated the silicon vanadium steel plate plasticity with higher with the life for helmet class deep-draw part
It produces.
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| CN109930069B (en) | 2019-03-28 | 2019-12-24 | 北京科技大学 | Manufacturing method of light steel plate with ultrahigh strength and high toughness |
| CN110079741A (en) * | 2019-06-19 | 2019-08-02 | 本钢板材股份有限公司 | A kind of armour plate and its manufacturing method |
| CN111235488A (en) * | 2019-12-24 | 2020-06-05 | 河钢股份有限公司承德分公司 | Bulletproof steel plate and preparation method and application thereof |
| CN111455289A (en) * | 2020-06-09 | 2020-07-28 | 重庆钢铁研究所有限公司 | High-strength hot-rolled bulletproof steel plate and manufacturing method thereof |
| CN113249653B (en) * | 2021-05-11 | 2022-02-08 | 北京理工大学 | Bullet steel for natural fragment warhead and preparation method thereof |
| CN113201693B (en) * | 2021-05-11 | 2022-03-25 | 北京理工大学 | Bullet steel for penetration and killing of multifunctional warhead and preparation method thereof |
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| CN1521000A (en) * | 2003-02-07 | 2004-08-18 | 佳能株式会社 | Method for producing ink jet head |
| FI123847B (en) * | 2011-06-15 | 2013-11-15 | Rautaruukki Oyj | METHOD FOR THE MANUFACTURE OF MEDIUM-CARBON STEEL AND HOT-ROLLED MEDIUM-STEEL |
| CN103436766A (en) * | 2013-07-13 | 2013-12-11 | 瞿立双 | Preparation method for nickel-chrome-containing alloy steel |
| CN103484781A (en) * | 2013-09-26 | 2014-01-01 | 宝山钢铁股份有限公司 | High-strength and high-toughness spring steel and manufacturing method thereof |
| CN103556069A (en) * | 2013-11-04 | 2014-02-05 | 洛阳双瑞特种装备有限公司 | Large-diameter seamless steel tube for high-pressure gas cylinders and manufacturing method thereof |
| CN104674121A (en) * | 2015-03-10 | 2015-06-03 | 山东钢铁股份有限公司 | Armor steel plate with high anti-bullet property and manufacturing method of armor steel plate |
| CN105088090A (en) * | 2015-08-28 | 2015-11-25 | 宝山钢铁股份有限公司 | Armor plate with tensile strength being 2000 MPa and manufacturing method thereof |
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Effective date of registration: 20181119 Address after: Room 208, No. 18 Science and Technology Road, Huaian Economic and Technological Development Zone, Huaian City, Jiangsu Province Applicant after: Huaian Iron & Steel Research Institute Co Ltd Applicant after: Shanghai University Address before: Room 208, No. 18 Science and Technology Road, Huaian Economic and Technological Development Zone, Huaian City, Jiangsu Province Applicant before: Huaian Iron & Steel Research Institute Co Ltd |
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