CN117026094A - High-strength protection bulletproof steel plate and production method thereof - Google Patents

High-strength protection bulletproof steel plate and production method thereof Download PDF

Info

Publication number
CN117026094A
CN117026094A CN202311234109.7A CN202311234109A CN117026094A CN 117026094 A CN117026094 A CN 117026094A CN 202311234109 A CN202311234109 A CN 202311234109A CN 117026094 A CN117026094 A CN 117026094A
Authority
CN
China
Prior art keywords
steel plate
equal
rolling
temperature
less
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311234109.7A
Other languages
Chinese (zh)
Inventor
欧阳藩
高擎
罗登
张勇伟
史术华
王振
冯赞
高海亮
脱臣德
刘琴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Valin Xiangtan Iron and Steel Co Ltd
Original Assignee
Hunan Valin Xiangtan Iron and Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hunan Valin Xiangtan Iron and Steel Co Ltd filed Critical Hunan Valin Xiangtan Iron and Steel Co Ltd
Priority to CN202311234109.7A priority Critical patent/CN117026094A/en
Publication of CN117026094A publication Critical patent/CN117026094A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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

Abstract

The invention discloses a high-strength protection bulletproof steel plate and a production method thereof, wherein the steel plate comprises the following alloy components, by weight, C=0.25-0.30%, si=0.20-0.80%, mn=0.5-1.00%, P is less than or equal to 0.020%, S is less than or equal to 0.010%, al=0.02-0.05%, ni+Cr+Mo=0.5-2.0%, nb+V+Ti=0.03-0.10%, B=0.0010-0.0020%, and the balance Fe and unavoidable impurities; ceq is less than or equal to 0.65%, the structure of the steel plate is a lath martensite structure, the hardness of the steel plate is more than or equal to 500HB, the tensile strength is more than or equal to 1700MPa, the elongation is more than or equal to 8%, and the impact energy at the core part of the steel plate at the temperature of minus 40 ℃ is more than 35J; the production process comprises smelting, continuous casting, heating, rolling and heat treatment. The chemical composition design of the invention adopts a Ni-Cr-B alloying system, and the high-strength high-toughness high-hardness steel plate XF500 with the maximum thickness of 20mm for high-strength protection is produced by a high-cleanliness molten steel smelting technology, a rolling control technology and an off-line tempering technology.

Description

High-strength protection bulletproof steel plate and production method thereof
Technical Field
The invention belongs to the technical field of steel production, and relates to a steel plate for high-strength protection bulletproof and a production method thereof.
Background
High strength steel sheets are widely used not only in the military field but also in civilian use. In military aspect, with war upgrading in local areas, military equipment and facilities such as tanks, armored cars, troop cars, scout cars and the like are increasingly in high-strength protection steel plates. In civil aspect, vehicles, building facilities and the like with special security requirements on national property, personnel, life and property are gradually used with high-strength protection steel plates with bulletproof function, such as securicar, bank counter, machine-made safe and the like, so that the market demand for the high-strength protection steel plates is more and more vigorous, and the performance index requirements for the steel plates are also higher and higher along with popularization of the lightweight concept of products.
The traditional bulletproof plate adopts a high-carbon component design, the strength and the hardness of the steel plate are improved by fully utilizing the content of C, but the risk of insufficient toughness storage exists. Tests prove that even though the surface hardness of the steel plate with insufficient toughness reserve is high, the bulletproof effect is not ideal.
Disclosure of Invention
The invention provides a steel plate for high-strength protection bulletproof and a production method thereof,
the technical scheme of the invention is as follows:
the steel plate for high-strength protection bulletproof comprises the following alloy components, by weight, C=0.25-0.30%, si=0.20-0.80%, mn=0.5-1.00%, P is less than or equal to 0.020%, S is less than or equal to 0.010%, al=0.02-0.05%, ni+Cr+Mo=0.5-2.0%, nb+V+Ti=0.03-0.10%, B=0.0010-0.0020%, and the balance Fe and unavoidable impurities; ceq is less than or equal to 0.65%, the structure of the steel plate is a lath martensite structure, the hardness of the steel plate is more than or equal to 500HB, the tensile strength is more than or equal to 1700MPa, the elongation is more than or equal to 8%, and the impact energy at the core part of the steel plate at the temperature of minus 40 ℃ is more than 35J.
The production process of the steel plate for high-strength protection bulletproof comprises smelting, continuous casting, heating, rolling and heat treatment, and the key process steps are as follows:
1) Rolling: adopting a two-stage rolling process, wherein the initial rolling temperature in the finish rolling stage is less than or equal to 1050 ℃, the finish rolling temperature in the finish rolling is 780-830 ℃, and the air cooling is carried out after the rolling;
2) And (3) heat treatment: adopting a quenching and low-temperature tempering mode, and tempering the steel plate by using a radiant tube type non-oxidation heating furnace; quenching temperature is 890-910 ℃, and heat preservation time coefficient is 3.0min/mm; the tempering temperature is 180-200 ℃, the tempering heat preservation time coefficient is 3.0min/mm, and the air cooling is carried out after tempering.
The invention adopts a proper amount of carbon content and Cr, ni, mo and B composite design, and adopts Nb, V and Ti composite addition of refined grains. The produced steel plate not only has high strength and high hardness, but also has better toughness. The alloy principle used is as follows.
The C element mainly forms various carbides in the steel plate, cementite and alloy carbide of the steel grade can effectively improve the strength and hardness of the steel plate, but the C content in the steel is too high, coarse carbide precipitation is caused, and the toughness of the steel plate is reduced.
Mn element can improve the hardenability of the steel plate, but if the Mn content is too high, a band-shaped structure is easily generated in the steel plate, and the band-shaped structure reduces the uniformity of the steel plate and has adverse effects on the performance.
Mo element can delay austenite transformation in the steel plate, can reduce austenite transformation temperature under continuous cooling condition, improves the hardenability of the steel plate, and increases the martensite content in the steel plate, but the Mo content is excessive, so that coarse martensite structure can be formed, and the toughness of the steel plate is reduced.
The Ni element can improve the austenite stability, the hardenability of the steel plate and the toughness of the steel plate. The new generation of bulletproof plates are used for improving the toughness of the steel plate, and the Ni content is improved. However, ni increases the carbon equivalent of the steel sheet, and the total added content is limited.
The beneficial effects of the invention are that: not only can the steel plate with high strength and high hardness be produced, but also the steel plate can be ensured to have certain toughness, thereby effectively improving the bulletproof effect.
Drawings
FIG. 1 is a texture profile of a 20mm thick ballistic panel produced in example 1.
Detailed Description
The invention is further illustrated below with reference to examples.
Example 1
The production of the high-toughness bulletproof steel plate, wherein the thickness of the steel plate is 20mm, and the chemical components and the carbon equivalent percentages are shown in Table 1. The production process comprises smelting, continuous casting, heating, rolling and heat treatment, and the key process steps are as follows:
(1) Rolling: adopting two-stage rolling, wherein the initial rolling temperature of rough rolling is 990 ℃, the final rolling temperature of finish rolling is 820 ℃, and water cooling is carried out after rolling;
(2) And (3) heat treatment: tempering temperature is 180 ℃, heating rate is 3min/mm, heat preservation time coefficient is 3.0min/mm, and air cooling is performed after tempering is finished.
Example 2
The production of the high-toughness bulletproof steel plate, wherein the thickness of the steel plate is 20mm, and the chemical components and the carbon equivalent percentages are shown in Table 1. The production process comprises smelting, continuous casting, heating, rolling and heat treatment, and the key process steps are as follows:
(1) Rolling: adopting two-stage rolling, wherein the initial rolling temperature of finish rolling is 980 ℃, the initial rolling temperature of finish rolling is 810 ℃, and water cooling is carried out to room temperature after rolling;
(2) Tempering: tempering temperature is 200 ℃, heating rate is 3min/mm, heat preservation time coefficient is 3.0min/mm, and air cooling is performed after tempering is finished.
Table 1 percent chemical composition (%)
Table 2 mechanical properties of the ballistic resistant sheet of examples

Claims (2)

1. A high-strength protection bulletproof steel plate is characterized in that the steel plate comprises, by weight, C=0.25-0.30%, si=0.20-0.80%, mn=0.5-1.00%, P is less than or equal to 0.020%, S is less than or equal to 0.010%, al=0.02-0.05%, ni+Cr+Mo=0.5-2.0%, nb+V+Ti=0.03-0.10%, B=0.0010-0.0020%, and the balance Fe and unavoidable impurities; ceq is less than or equal to 0.65%, the structure of the steel plate is a lath martensite structure, the hardness of the steel plate is more than or equal to 500HB, the tensile strength is more than or equal to 1700MPa, the elongation is more than or equal to 8%, and the impact energy at the core part of the steel plate at the temperature of minus 40 ℃ is more than 35J.
2. The production method of the steel plate for high-strength protection bulletproof comprises the following steps of smelting, continuous casting, heating, rolling and heat treatment, and is characterized in that:
1) Rolling: adopting a two-stage rolling process, wherein the initial rolling temperature in the finish rolling stage is less than or equal to 1050 ℃, the finish rolling temperature in the finish rolling is 780-830 ℃, and the air cooling is carried out after rolling;
2) And (3) heat treatment: adopting quenching and low-temperature tempering modes, and tempering the steel plate by using a radiant tube type non-oxidation heating furnace；
Quenching temperature is 890-910 ℃, and the heat preservation time coefficient is 3.0min/mm; the tempering temperature is 180-200 ℃, the tempering heat preservation time coefficient is 3.0min/mm, and the air cooling is performed after tempering.
CN202311234109.7A 2023-09-23 2023-09-23 High-strength protection bulletproof steel plate and production method thereof Pending CN117026094A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311234109.7A CN117026094A (en) 2023-09-23 2023-09-23 High-strength protection bulletproof steel plate and production method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311234109.7A CN117026094A (en) 2023-09-23 2023-09-23 High-strength protection bulletproof steel plate and production method thereof

Publications (1)

Publication Number Publication Date
CN117026094A true CN117026094A (en) 2023-11-10

Family

ID=88643409

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311234109.7A Pending CN117026094A (en) 2023-09-23 2023-09-23 High-strength protection bulletproof steel plate and production method thereof

Country Status (1)

Country Link
CN (1) CN117026094A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106756495A (en) * 2016-12-19 2017-05-31 山东钢铁股份有限公司 A kind of 1760MPa superelevation strong anti-bullet steel and its manufacture method
CN114686762A (en) * 2022-03-30 2022-07-01 鞍钢股份有限公司 Production method of high-strength and high-toughness hot continuous rolling thin steel plate with Brinell hardness of 500HBW
CN115341138A (en) * 2022-07-12 2022-11-15 江阴兴澄特种钢铁有限公司 High-strength protective steel plate and manufacturing method thereof
CN115637383A (en) * 2022-10-26 2023-01-24 东北大学 500 HBW-hardness low-alloy high-strength high-hardness martensite protective steel and manufacturing method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106756495A (en) * 2016-12-19 2017-05-31 山东钢铁股份有限公司 A kind of 1760MPa superelevation strong anti-bullet steel and its manufacture method
CN114686762A (en) * 2022-03-30 2022-07-01 鞍钢股份有限公司 Production method of high-strength and high-toughness hot continuous rolling thin steel plate with Brinell hardness of 500HBW
CN115341138A (en) * 2022-07-12 2022-11-15 江阴兴澄特种钢铁有限公司 High-strength protective steel plate and manufacturing method thereof
CN115637383A (en) * 2022-10-26 2023-01-24 东北大学 500 HBW-hardness low-alloy high-strength high-hardness martensite protective steel and manufacturing method thereof

Similar Documents

Publication Publication Date Title
CN110423955B (en) Surface layer super-hardening type super-strength heat-resistant gear bearing steel and preparation method thereof
WO2017036338A1 (en) Armor plate with 2000mpa-grade tensile strength, and manufacturing method therefor
CN109280850A (en) A kind of big thickness toughness low alloy wear resistant steel plate of 80mm and its manufacturing method
CN101676425B (en) Martensite abrasion-resistant steel with high strength
CN104674121A (en) Armor steel plate with high anti-bullet property and manufacturing method of armor steel plate
US20220002849A1 (en) Low-yield-ratio ultra-high-strength high-toughness steel for pressure hulls and preparation method therefor
CN113249645B (en) High-ductility and ultrahigh-strength ductile steel and preparation method thereof
CN110468347B (en) Bainite steel rail with high strength and toughness and manufacturing method thereof
CN110863140B (en) Low-alloy ultrahigh-strength structural steel and preparation method thereof
US10793932B1 (en) Method for manufacturing lightweight steel plate with ultrahigh strength and high toughness
CN111549277B (en) Martensite wear-resistant steel plate resistant to atmospheric corrosion and manufacturing method thereof
CN110205557B (en) 350-plus 380HBW hardness-grade thick-specification high-toughness wear-resistant steel plate and preparation method thereof
CN115341138B (en) High-strength protective steel plate and manufacturing method thereof
CN107267859A (en) A kind of strong armour plate of superelevation and preparation method thereof
CN117026094A (en) High-strength protection bulletproof steel plate and production method thereof
CN114164332A (en) Production method of high-temperature-wear-resistant and wear-resistant steel plate
CN115261717A (en) 1800 MPa-grade high-strength self-strength and self-toughness steel plate for protection and manufacturing method thereof
CN111455289A (en) High-strength hot-rolled bulletproof steel plate and manufacturing method thereof
CN109763072A (en) A kind of think gauge high-wearing feature steel plate and its manufacturing method
CN113528981B (en) 2000 MPa-level steel plate for protection and preparation method thereof
CN114892081B (en) High-thickness 460 MPa-level steel plate with excellent low-temperature toughness for ocean engineering and production method thereof
CN115478210B (en) 1500 MPa-grade high-strength self-toughening protective steel plate and manufacturing method thereof
CN114058814B (en) Preparation method of high-hardness uniformity NM400 wear-resistant steel
CN114369771B (en) High-toughness wear-resistant steel with excellent cold bending property and manufacturing method thereof
CN115558863B (en) Marine steel with yield strength of more than or equal to 750MPa and low yield ratio and production process thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination