CN103510017A - Ultrahigh-strength light armor plate and manufacturing method thereof - Google Patents
Ultrahigh-strength light armor plate and manufacturing method thereof Download PDFInfo
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- CN103510017A CN103510017A CN201210201402.9A CN201210201402A CN103510017A CN 103510017 A CN103510017 A CN 103510017A CN 201210201402 A CN201210201402 A CN 201210201402A CN 103510017 A CN103510017 A CN 103510017A
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Abstract
The invention discloses an ultrahigh-strength light armor plate and a manufacturing method thereof. According to the invention, steel is heated to 1150-1270 DEG C and is austenitized; the steel is fetched from the furnace, and iron oxide skin is removed by using high-pressure water; the material is rolled by using a continuous rolling set; a steel plate obtained after finish rolling is delivered through a laminar cooling device and is cooled to 650-700 DEG C; the steel plate is coiled into a continuous-rolling coiled plate by using a coiling machine; the coiled plate is cooled, and is de-coiled into a flat plate by using a de-coiling set; the flat plate is heated to 850-900 DEG C in a quenching heating furnace; the temperature is maintained for 20-40min, and the plate is fetched; the plate is quenched in a quenching set; the quenched steel plate is delivered into a tempering furnace, and is subjected to tempering under a maintained temperature of 140-220 DEG C for 40-80min. The process provided by the invention is advantaged in that: with the process, the produced ultrahigh-strength light armor plate has tensile strength Rm no lower than 1700MPa, A no lower than 7%, and HBW of 490-550. The plate has excellent comprehensive performances. A thickness specification of the plate reaches 3-12mm.
Description
Technical field
The present invention relates to a kind of lightweight armor plate, specifically a kind of superstrength lightweight armor plate and manufacturing process thereof, belong to armor plate field.
Background technology
At present, anti-probably explosion-proof vehicle requires both had high ballistic performance, needs again to possess good maneuvering ability and energy-saving and emission-reduction performance.Attenuate armour plate thickness, makes bullet-proof vehicle lightweight be raising vehicle mobility, reach one of effective way of energy-saving and emission-reduction object.But armour plate is realized lightweight simultaneously at thickness thinning, also must improve intensity, as high intensity, toughness and ductility, and welding property, to meet high ballistic performance, require and manufacture requirement.
But existing armour plate alloy content is high, cannot meet the requirement of armour plate lightweight and high ballistic performance and high performance-price ratio simultaneously.Therefore, need to develop a kind of lightweight steel plate of novel superstrength, make its not only reduced thickness, but also there is the rational Match of high intensity, toughness, ductility and certain welding property, simultaneously good plate cut.
Summary of the invention
In order to address the above problem, the present invention has designed a kind of superstrength lightweight armor plate and manufacturing process thereof, the tensile strength Rm >=1700MPa of described armor plate, A >=7%, HBW=490～550, high comprehensive performance, thickness specification reaches 3～12mm, intensity superelevation.
Technical scheme of the present invention is:
A kind of superstrength lightweight armor plate, the chemical constitution of described armor plate is by weight percentage: C0.25～0.33%, Si0.20～0.40%, Mn1.1～1.50%, Cr≤0.6%, Nb+V+Ti≤0.15%, B0.0005～0.0040%, P≤0.020%, S≤0.008%, all the other are Fe.
Further, the thickness of described armor plate is 3～12mm.
A manufacturing process for superstrength lightweight armor plate, comprise smelting molten steel, external refining, heating austenitizing, high pressure water dispel iron scale, rolling, cooling, curling, open flat, quenching, tempering process.
Further, described heating austenitizing temperature is 1150 ℃～1270 ℃.
Further, described cooling temperature is 650 ℃～700 ℃.
Further, described quenching process is: after quenching heating furnace is heated to 850 ℃～900 ℃ insulation 20～40 minutes, come out of the stove, in quenching unit, quench, the steel plate of quenching enters and at 140 ℃～220 ℃ temperature, is incubated 40～80 minutes in tempering stove and carries out tempering.
Concrete operation step is as follows:
(1) smelting molten steel
Molten steel is smelted in converter, reduces the carbon content in molten steel in smelting process, and adds various alloying elements according to the chemical composition of above-mentioned requirements, and the chemical composition of molten steel is tapped after reaching requirement composition.
(2) external refining
By the molten steel of having smelted in LF stove through row refining, the process of refining can further be removed harmful element P and S, finely tune simultaneously chemical composition and fine setting liquid steel temperature, for continuous casting of molten steel creates conditions.
Continuous casting: the molten steel after refining is carried out on slab caster to continuous casting operation, this operation is that molten steel is continuously cast into continuous casting steel billet, for follow-up rolling creates conditions.
(3) heating austenitizing
By slab surface inspection and cleaning, pack in slab process furnace and heat, make it reach austenitizing temperature, reduce first the resistance to deformation of slab rolling, simultaneously after austenitizing, the alloying element of steel grade can be fused in austenite admittedly, for the Grain refinement of alloying element is achieved.
(4) high pressure water is dispelled iron scale
The iron scale generating in casting process and heat-processed must be dispelled, if do not removed, can form the defects such as iron scale is pressed into, pit by the surface of steel plate after rolling.
(5) rolling
The slab of removing iron scale is rolled according to the rolling procedure weaving in tandem rolling unit, is finally rolled into the continuous-milling steel plate of required thickness and width.
(6) cooling
Steel plate after finish to gauge is cooling through laminar flow, and the cooling effect of laminar flow is to reduce rapidly finishing temperature, to prevent that cooled steel plate is at high-temperature zone overstand grain growth.
(7) curling
Cooled steel plate carries out curling in curling unit, and the steel plate after curling is convenient to transportation and is stored.
(8) open flat
Hot-rolled coil carried out in opening flat-bed machine group to uncoiling, aligning ,Qie both sides, cut the operations such as scale, surface quality inspection, stacking, bundling, produce out plain plate.
(9) quench
To open plain plate packs one by one quenching heating furnace into and is added to 850 ℃～900 ℃ and reaches austenitizing temperature, after insulation 20～40 minutes, come out of the stove, in quenching unit, quench and make steel plate obtain martensitic stucture, after quenching, the steel plate of martensitic stucture is packed into and in tempering stove, at 140 ℃～220 ℃ temperature, be incubated 40～80 minutes and carry out tempering, tempering makes its steel plate be organized as tempered martensite.
Described armor plate thickness is 3～12mm.
Result: tensile strength Rm >=1700MPa, A >=7%, HBW=490～550.
The invention has the advantages that: the high-strength light armor plate obtaining by the inventive method, finally reach tensile strength Rm >=1700MPa, A >=7%, the thickness specification of the high comprehensive performance of HBW:490～550 reaches 3～12mm superstrength armor plating, excellent property, has met the requirement of armour plate lightweight and high ballistic performance and high performance-price ratio.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
Embodiment 1
A lightweight armor plate, the chemical constitution of described armor plate is by weight percentage: C=0.26%, Si=0.30%, Mn=1.25%, Cr=0.35%, Nb+V+Ti+B=0.12%, P=0.015%, S=0.005%, all the other are Fe.
Embodiment 2
A lightweight armor plate, the chemical constitution of described armor plate is by weight percentage: C=0.28%, Si=0.32%, Mn=1.3%, Cr=0.40%, Nb+V+Ti+B=0.13%, P=0.020%, S=0.005%, all the other are Fe.
Embodiment 3
A lightweight armor plate, the chemical constitution of described armor plate is by weight percentage: C=0.30%, Si=0.35%, Mn=1.35%, Cr=0.45%, Nb+V+Ti+B=0.14%, P=0.020%, S=0.005%, all the other are Fe.
Embodiment 4
A lightweight armor plate, the chemical constitution of described armor plate is by weight percentage: C=0.32%, Si=0.35%, Mn=1.40%, Cr=0.50%, Nb+V+Ti+B=0.15%, P=0.015%, S=0.003%, all the other are Fe.
Embodiment 5
A lightweight armor plate, the chemical constitution of described armor plate is by weight percentage: C=0.33%, Si=0.40%, Mn=1.50%, Cr=0.60%, Nb+V+Ti+B=0.15%, P=0.010%, S=0.005%, all the other are Fe.
Embodiment 6
A manufacturing process for superstrength lightweight armor steel plate described in 1-5, comprises the following steps:
(1) smelting molten steel
Molten steel is smelted in converter, reduces the carbon content in molten steel in smelting process, and adds various alloying elements according to the chemical composition of above-mentioned requirements, and the chemical composition of molten steel is tapped after reaching requirement composition.
(2) external refining
The molten steel of having smelted is carried out in LF stove to refining, the process of refining is harmful element P and the S in place to go further, finely tunes chemical composition and fine setting liquid steel temperature, for continuous casting of molten steel creates conditions simultaneously.
(3) heating austenitizing
By slab surface inspection and cleaning, pack in slab process furnace and heat, make it reach austenitizing temperature, reduce first the resistance to deformation of slab rolling, simultaneously after austenitizing, the alloying element of steel grade can be fused in austenite admittedly, for the Grain refinement of alloying element is achieved.
(4) high pressure water is dispelled iron scale: the iron scale generating in casting process and heat-processed must be removed, if do not removed, can form the defects such as iron scale is pressed into by the surface of steel plate after rolling.
(5) rolling
The slab of removing iron scale is rolled according to the rolling procedure weaving in tandem rolling unit, is finally rolled into the continuous-milling steel plate of required thickness and width.
(6) cooling
Steel plate after finish to gauge is cooling through laminar flow, and the cooling effect of laminar flow is to reduce rapidly finishing temperature, to prevent that cooled steel plate is at high-temperature zone overstand grain growth.
(7) curling
Cooled steel plate carries out curling in curling unit, and the steel plate after curling is convenient to transportation and is stored.
(8) open flat
Hot-rolled coil carried out in opening flat-bed machine group to uncoiling, aligning ,Qie both sides, cut the operations such as scale, surface quality inspection, stacking, bundling, produce out plain plate.
(9) quench
To open plain plate packs one by one quenching heating furnace into and is added to 850 ℃～900 ℃ and reaches austenitizing temperature, after insulation 20～40 minutes, come out of the stove, in quenching unit, quench and make steel plate obtain martensitic stucture, after quenching, the steel plate of martensitic stucture packs into and in tempering stove, at 140 ℃～220 ℃ temperature, is incubated 40～80 minutes and carries out tempering, and tempering makes its steel plate be organized as tempered martensite.
Finally reach tensile strength Rm >=1700MPa, A >=7%, the thickness specification of the high comprehensive performance of HBW:490～550d is 3～12mm superstrength first steel plate.
The results are shown in following table:
Table one is chemical composition of the present invention;
Table two is the mechanical property of composition of the present invention armour plate after process heat of the present invention is processed;
Table one
Table two
Note: the heating of steel plate is different and different according to its thickness with soaking time.
Except as otherwise noted, the percentage ratio adopting in the present invention is weight percentage.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a superstrength lightweight armor plate, it is characterized in that: the chemical constitution of described armor plate is by weight percentage: C=0.25～0.33%, Si=0.20～0.40%, Mn=1.1～1.50%, Cr≤0.6%, Nb+V+Ti≤0.15%, B=0.0005～0.0040%, P≤0.020%, S≤0.008%, all the other are Fe.
2. superstrength lightweight armor plate according to claim 1, is characterized in that: the thickness of described armor plate is 3～12mm.
3. superstrength lightweight armor plate according to claim 1, is characterized in that: described superstrength lightweight armor plate tensile strength Rm >=1700Mpa, A >=7%, HBW=490～550.
4. the manufacturing process of the superstrength lightweight armor plate as described in any one in claim 1-3, it is characterized in that, comprising: smelting molten steel, external refining, heating austenitizing, high pressure water dispel iron scale, rolling, cooling, curling, open flat, quenching and tempering process.
5. the manufacturing process of superstrength lightweight armor plate according to claim 4, is characterized in that: described heating austenitizing temperature is 1150 ℃～1270 ℃.
6. the manufacturing process of superstrength lightweight armor plate according to claim 4, is characterized in that: described cooling temperature is 650 ℃～700 ℃.
7. the manufacturing process of superstrength lightweight armor plate according to claim 6, is characterized in that: described cooling be that the steel plate after finish to gauge is cooling through laminar flow.
8. the manufacturing process of superstrength lightweight armor plate according to claim 4, it is characterized in that, described quenching process is: after quenching heating furnace is heated to 850 ℃～900 ℃ insulation 20～40 minutes, come out of the stove, in quenching unit, quench, the steel plate of quenching enters and at 140 ℃～220 ℃ temperature, is incubated 40～80 minutes in tempering stove and carries out tempering.
9. the manufacturing process of superstrength lightweight armor plate according to claim 4, it is characterized in that, described smelting molten steel method is: molten steel is smelted in converter, in smelting process, reduce the carbon content in molten steel, and add various alloying elements according to the chemical composition of above-mentioned requirements, the chemical composition of molten steel is tapped after reaching requirement composition.
10. the manufacturing process of superstrength lightweight armor plate according to claim 4, is characterized in that: described external refining for by molten steel in LF stove through row refining.
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| CN201210201402.9A CN103510017A (en) | 2012-06-19 | 2012-06-19 | Ultrahigh-strength light armor plate and manufacturing method thereof |
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| CN201210201402.9A CN103510017A (en) | 2012-06-19 | 2012-06-19 | Ultrahigh-strength light armor plate and manufacturing method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993235A (en) * | 2014-05-19 | 2014-08-20 | 首钢总公司 | Method for manufacturing high-strength hot rolled bulletproof steel plate |
| 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 |
| CN108374075A (en) * | 2018-03-12 | 2018-08-07 | 包头北方安全防护装备制造有限公司 | The method of the large-scale armour plate brake forming part quenching distortion of control |
| CN109207851A (en) * | 2018-09-28 | 2019-01-15 | 宝山钢铁股份有限公司 | A kind of ultra-high strength steel plate and its manufacturing method |
| CN109930069A (en) * | 2019-03-28 | 2019-06-25 | 北京科技大学 | A kind of manufacturing method for the light-duty steel plate having both ultrahigh-intensity high-toughness |
-
2012
- 2012-06-19 CN CN201210201402.9A patent/CN103510017A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993235A (en) * | 2014-05-19 | 2014-08-20 | 首钢总公司 | Method for manufacturing high-strength hot rolled bulletproof steel plate |
| CN103993235B (en) * | 2014-05-19 | 2016-04-27 | 首钢总公司 | A kind of manufacture method of high-strength hot-rolled armor plate |
| 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 |
| CN104674121B (en) * | 2015-03-10 | 2017-03-08 | 山东钢铁股份有限公司 | A kind of high elastoresistance armour plate and its manufacture method |
| CN108374075A (en) * | 2018-03-12 | 2018-08-07 | 包头北方安全防护装备制造有限公司 | The method of the large-scale armour plate brake forming part quenching distortion of control |
| CN109207851A (en) * | 2018-09-28 | 2019-01-15 | 宝山钢铁股份有限公司 | A kind of ultra-high strength steel plate and its manufacturing method |
| CN109930069A (en) * | 2019-03-28 | 2019-06-25 | 北京科技大学 | A kind of manufacturing method for the light-duty steel plate having both ultrahigh-intensity high-toughness |
| US10793932B1 (en) * | 2019-03-28 | 2020-10-06 | University Of Science And Technology Beijing | Method for manufacturing lightweight steel plate with ultrahigh strength and high toughness |
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Application publication date: 20140115 |