CN111118412B - Bulletproof steel plate and heat treatment method thereof - Google Patents
Bulletproof steel plate and heat treatment method thereof Download PDFInfo
- Publication number
- CN111118412B CN111118412B CN202010161846.9A CN202010161846A CN111118412B CN 111118412 B CN111118412 B CN 111118412B CN 202010161846 A CN202010161846 A CN 202010161846A CN 111118412 B CN111118412 B CN 111118412B
- Authority
- CN
- China
- Prior art keywords
- steel plate
- quenching
- bulletproof
- argon
- water
- 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.)
- Active
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
- C22C38/18—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
- 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
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/04—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
- C22C38/48—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
Landscapes
- 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 Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention belongs to the field of heat treatment of steel materials, and particularly relates to a bulletproof steel plate and a heat treatment method thereof, wherein the bulletproof steel plate comprises 0.24-0.26% of C, 0.35-0.45% of Si, 1.1-1.2% of Mn, 0.015-0.06% of Al, 0.3-1.0% of Ni, 0.45-0.55% of Cr0.45, 0.25-0.35% of Mo0.35%, 0.02-0.03% of Nb0.017-0.027% of Ti, 0.0010-0.0020% of B, less than or equal to 0.010% of P, less than or equal to 0.0020% of S, less than or equal to 0.0040% of N, less than or equal to 0.0020% of O, and the balance of Fe element and inevitable impurities. Compared with the prior art, the invention has the beneficial effects that: 1) water is atomized into extremely fine water drops by using high-pressure argon, so that a water vapor film on the surface of the steel plate is broken, and the cooling capacity is improved; 2) when the phase change point of the martensite is approached, the water flow is reduced, the argon pressure and flow are improved, and the deformation and residual stress are reduced; 3) the oxidation phenomenon is reduced, and the environmental pollution is small.
Description
Technical Field
The invention belongs to the field of heat treatment of steel materials, and particularly relates to a bulletproof steel plate and a heat treatment method thereof.
Background
The civil bulletproof steel plate has the main function of preventing bullets from invading the steel plate, and is widely applied to mobile silver vehicles, private bulletproof cars, police bulletproof patrol cars, antiriot vehicles and the like. Increasing the thickness of the steel plate increases the energy required by the projectile to invade the steel plate, which is an effective method for improving the anti-elastic performance of the steel plate, but the method increases the dead weight of the vehicle and reduces the effective load capacity of the vehicle, so that the thickness of the bulletproof steel plate is reduced, the strength, toughness, welding performance and the like of the bulletproof steel plate are improved, the requirements of lightweight, motorization and bulletproof of the bulletproof vehicle are met, and the development direction of the bulletproof steel plate is provided.
In recent years, more and more thin bulletproof steel plates are applied to light special vehicles in the civil field, the steel plates are divided into heat-treated steel plates and non-heat-treated steel plates, the non-heat-treated steel plates generally increase the alloy consumption, and meanwhile, the cooling process in the hot rolling process is complex and has higher requirements on equipment and process control precision. The heat-treated steel plate is generally subjected to quenching and low-temperature tempering treatment, the strength and the hardness of the steel plate are effectively improved, the strength is more than 1500Mpa, the steel plate structure is tempered martensite, the hardenability of the steel plate is ensured by adopting a Cr-Mo system in the alloying aspect, and the toughness of the steel plate is improved by adding Ni.
The poor plate shape control and plasticity of the heat-treated bulletproof steel plate are always the control difficulties of the bulletproof steel plate, which mainly means that the temperature difference between the surface and the center of the steel plate is large when water is used as a cooling medium, and particularly in a martensite transformation temperature region, the cooling water is in a boiling stage to cause too fast cooling, so that the martensite transformation is easy to cause too fast to generate great internal stress, and the steel plate is deformed or even cracked.
Disclosure of Invention
The invention aims to provide a bulletproof steel plate and a heat treatment method thereof, which overcome the defects of the prior art, atomize water into extremely fine water drops by utilizing high-pressure argon in a high-temperature area in the steel plate quenching process by controlling the flow and pressure of water and argon at different stages of the steel plate quenching, break a water vapor film on the surface of the steel plate and improve the cooling capacity; when the temperature of the steel plate is close to the martensite phase transformation point in the quenching process, the water flow is reduced, the argon pressure and the flow are improved, the temperature difference between the surface of the steel plate and the center is small, the deformation and the residual stress of the quenched steel plate are reduced, and the plate type control precision and the plasticity of the steel plate are improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the technical scheme is as follows: a ballistic resistant steel sheet characterized by: the length of the bulletproof steel plate is 3.0-10.0 meters, the width is 1.0-2.0 meters, and the thickness is 2.2-8.0 mm; the chemical components of the bulletproof steel plate are 0.24-0.26% of C, 0.35-0.45% of Si, 1.1-1.2% of Mn, 0.015-0.06% of Al, 0.3-1.0% of Ni, 0.45-0.55% of Cr0.25-0.35% of Mo0.25, 0.02-0.03% of Nb0.017-0.027% of Ti, 0.0010-0.0020% of B, less than or equal to 0.010% of P, less than or equal to 0.0020% of S, less than or equal to 0.0040% of N, less than or equal to 0.0020% of O, and the balance of Fe element and inevitable impurities.
Description of the components: si acts as a solid solution strengthening effect in the steel, promoting bainite formation. Too small content, insufficient strength, and too much rust formation on the surface easily affects the surface quality. P, S and N are impurity elements and are reduced as much as possible. Cr increases the hardenability of the steel. Nb and Ti are refined grain elements and precipitation strengthening is performed. Too little addition, not obvious effect of refining grains and improving strength, excessive addition, cost increase and little performance increase. B is favorable for bainite transformation and improves the strength of the steel. CE is an important parameter for judging the welding performance, and if the carbon equivalent value is more than 0.55, the welding performance is obviously reduced.
The second technical proposal is that: a heat treatment method of a bulletproof steel plate sequentially comprises steel plate heating, steel plate quenching and steel plate tempering, and is characterized by comprising the following specific operation steps:
1) heating the steel plate at 890-930 ℃ for 5 min/mm; injecting argon into the furnace in the heating process to avoid the oxidation of the steel plate in the heating process, and detecting and monitoring the oxygen content in the furnace by using an oxygen analyzer to ensure that the oxygen content in the furnace in the heating process is less than 0.03 percent;
2) quenching the steel plate, namely quenching the steel plate by adopting a quenching press and adopting an argon/water atomization quenching process; the process A is adopted in the first half of quenching, and the process B is adopted in the second half of quenching, wherein the process A comprises the following steps: the water pressure is 0.25MPa to 0.35MPa, and the water flow on the upper surface of the steel plate is 9 m to 36m3Min, the water flow of the lower surface of the steel plate is 15-40m3Min, the water flow ratio of the upper surface and the lower surface of the steel plate is 0.6-0.9, the argon pressure is 0.4MPa-1.0MPa, and the argon flow is 1% -15% of the water flow; and a process B: the water pressure and the water flow of the upper surface and the lower surface of the steel plate are 70-80% of the process A, the argon pressure is 1.5-2 times of the process A, and the argon flow is 2-5 times of the process A.
3) Tempering the steel plate at the tempering temperature of 180 ℃ and 220 ℃ for 18 min/mm.
The steel plate heating step is performed in a roller hearth quenching furnace.
The argon/water atomization quenching process adopts a gas-water atomization nozzle, argon and water are mixed in the nozzle and then sprayed to the surface of the steel plate, the nozzle is made of stainless steel, and the angle of a radiation surface of the nozzle is 90-150 degrees.
In the step of quenching the steel plate, for the steel plate with the thickness of 2.2mm-6.0mm, the quenching time of the steel plate is 20 seconds in total, wherein the process A is adopted within 1-13 seconds, and the process B is adopted within 14-20 seconds; and for the steel plate with the thickness of more than 6.0mm and not more than 8.0mm, the quenching time of the steel plate is 26 seconds in total, wherein the process A is adopted within 1 to 17 seconds, and the process B is adopted within 18 to 26 seconds.
The tempering of the steel plate is carried out in a roller hearth tempering furnace.
Compared with the prior art, the invention has the beneficial effects that:
1) in a high-temperature area in the steel plate quenching process, high-pressure argon is utilized to atomize water into extremely fine water drops, so that a water vapor film on the surface of the steel plate is broken, the cooling capacity is improved, and the quenching effect is further improved;
2) when the temperature of the steel plate is close to the martensite phase transformation point in the quenching process, the water flow is reduced, the argon pressure and the flow are improved, the advantages of good quenching uniformity of high-pressure argon and small temperature difference between the surface and the center of the steel plate are fully exerted, the deformation of the steel plate is small after quenching, the residual stress is small, and the plate type control precision and the plasticity of the steel plate are improved;
3) the oxidation phenomenon on the surface of the steel plate is reduced, water resources are saved, and environmental pollution is low.
The specific implementation mode is as follows:
the following examples are provided to further illustrate embodiments of the present invention:
examples are given.
The chemical element components of the bulletproof steel plate are as follows: 0.24% of C, 0.44% of Si, 1.15% of Mn1, 0.03% of Al, 0.54% of Ni0, 0.5% of Cr0, 0.3% of Mo0.025% of Nb0.025% of Ti, 0.0017% of B, 0.006% of P, 0.0018% of S, 0.0035% of N, 0.0018% of O and the balance of inevitable impurities of Fe. The length of the steel plate is 6.0 meters, the width of the steel plate is 1.8 meters, and the thickness of the steel plate is 4 mm.
The heat treatment operation steps are as follows:
1) heating a steel plate, namely heating the steel plate by using a roller hearth type quenching furnace, detecting the temperature in the furnace by using a thermocouple, wherein the heating temperature is 900 ℃, keeping the temperature for 20min after the tail part of the steel plate reaches the heating temperature, and detecting the oxygen content in the furnace to be 0.028% by using an oxygen analyzer.
2) Quenching a steel plate, wherein a quenching press is adopted to carry out quenching treatment on the steel plate, water/gas supply of the quenching press is divided into 8 areas for ensuring indexes such as flatness, hardness and the like of the quenched steel plate, namely 4 areas of the upper surface and the lower surface of the steel plate respectively, 4480 gas-water atomizing nozzles are totally arranged, the nozzle is made of 304 stainless steel, the angle of a nozzle radiation surface is 120 degrees, each water/gas inlet pipeline is provided with a quick valve, and the water/gas supply of the quenching press is realized by quickly opening or closing a valve group. The quenching time is accumulated for 20 seconds, the water pressure is 0.3MPa in the first half 1-13 seconds, and the water flow on the upper surface of the steel plate is 25m3Min, water flow of the lower surface of the steel plate is 30m3Min, argon pressure of 0.5MPa, argon flow of 3m3And/min. In the second half of 14-20 s, the water pressure is 0.22MPa, and the water flow on the upper surface of the steel plate is 20m3Min, water flow of the lower surface of the steel plate is 24m3Min, argon pressure of 0.8MPa, argon flow of 8.5m3/min。
3) And (3) tempering the steel plate, namely tempering the steel plate by using a roller hearth type tempering furnace, wherein the tempering temperature of the steel plate is 200 ℃, and the heat preservation time is 70 min.
After the heat treatment, the structure of the steel plate is tempered martensite and martensite, and the mechanical property test results are within the design range, and specifically comprise the following steps:
the bulletproof performance can reach the A level of a box body or a bulletproof steel plate in the public safety industry standard GA164-2005 of the people's republic of China.
And after treatment, placing the level on the surface of the steel plate, and measuring the distance of a gap between the steel plate and the level, namely the unevenness of the steel plate. Compared with the conventional method of using water as a quenching medium, the method has the advantages that the average value of the unevenness measurement results of 30 groups of steel plates is compared, and the plate type of the steel plate is better controlled.
The above embodiments are merely specific examples selected for illustrating the objects, technical solutions and advantages of the present invention in detail, and should not be construed as limiting the scope of the present invention, and various modifications, equivalent substitutions and improvements can be made without departing from the spirit and principle of the present invention.
Claims (5)
1. A ballistic resistant steel sheet characterized by: the length of the bulletproof steel plate is 3.0-10.0 meters, the width is 1.0-2.0 meters, and the thickness is 2.2-8.0 mm; the chemical components of the bulletproof steel plate are 0.24-0.26% of C, 0.35-0.45% of Si, 1.1-1.2% of Mn, 0.015-0.06% of Al, 0.3-1.0% of Ni, 0.45-0.55% of Cr0.25-0.35% of Mo0.25, 0.02-0.03% of Nb0.017-0.027% of Ti, 0.0010-0.0020% of B, less than or equal to 0.010% of P, less than or equal to 0.0020% of S, less than or equal to 0.0040% of N, less than or equal to 0.0020% of O, and the balance of Fe element and inevitable impurities;
the heat treatment method of the bulletproof steel plate sequentially comprises steel plate heating, steel plate quenching and steel plate tempering, and is characterized by comprising the following specific operation steps of:
1) heating the steel plate at 890-930 ℃ for 5 min/mm; injecting argon into the furnace in the heating process to avoid the oxidation of the steel plate in the heating process, and detecting and monitoring the oxygen content in the furnace by using an oxygen analyzer to ensure that the oxygen content in the furnace in the heating process is less than 0.03 percent;
2) quenching the steel plate, namely quenching the steel plate by adopting a quenching press and adopting an argon/water atomization quenching process; the process A is adopted in the first half of quenching, and the process B is adopted in the second half of quenching, wherein the process A comprises the following steps: the water pressure is 0.25MPa to 0.35MPa, and the water flow on the upper surface of the steel plate is 9 m to 36m3Min, the water flow of the lower surface of the steel plate is 15-40m3Min, the water flow ratio of the upper surface and the lower surface of the steel plate is 0.6-0.9, the argon pressure is 0.4MPa-1.0MPa, and the argon flow is 1% -15% of the water flow; and a process B: the water pressure and the water flow of the upper surface and the lower surface of the steel plate are 70-80% of the process A, the argon pressure is 1.5-2 times of the process A, and the argon flow is 2-5 times of the process A;
3) tempering the steel plate at the tempering temperature of 180 ℃ and 220 ℃ for 18 min/mm.
2. The heat treatment method for a bulletproof steel sheet according to claim 1, wherein the steel sheet heating step is performed in a roll-bottom type quenching furnace.
3. The heat treatment method of the bulletproof steel plate according to claim 1, characterized in that a gas-water atomization nozzle is adopted in the argon/water atomization quenching process, argon and water are mixed in the nozzle and then sprayed to the surface of the bulletproof steel plate, the nozzle is made of stainless steel, and the radiation surface angle of the nozzle is 90-150 degrees.
4. The heat treatment method for a bulletproof steel sheet according to claim 1, wherein in the steel sheet quenching step, the quenching time of the steel sheet is 20 seconds in total for a steel sheet having a thickness of 2.2mm to 6.0mm, wherein process a is used for 1 to 13 seconds, and process B is used for 14 to 20 seconds; and for the steel plate with the thickness of more than 6.0mm and not more than 8.0mm, the quenching time of the steel plate is 26 seconds in total, wherein the process A is adopted within 1 to 17 seconds, and the process B is adopted within 18 to 26 seconds.
5. The heat treatment method for a bulletproof steel sheet according to claim 1, wherein the tempering of the steel sheet is performed in a roller hearth tempering furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010161846.9A CN111118412B (en) | 2020-03-10 | 2020-03-10 | Bulletproof steel plate and heat treatment method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010161846.9A CN111118412B (en) | 2020-03-10 | 2020-03-10 | Bulletproof steel plate and heat treatment method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111118412A CN111118412A (en) | 2020-05-08 |
| CN111118412B true CN111118412B (en) | 2021-07-20 |
Family
ID=70493658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010161846.9A Active CN111118412B (en) | 2020-03-10 | 2020-03-10 | Bulletproof steel plate and heat treatment method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111118412B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013012118A1 (en) * | 2013-07-18 | 2015-01-22 | C.D. Wälzholz GmbH | Cold-rolled narrow strip in the form of flat wire or profiles made of a high-strength steel for use in flexible pipes, in particular in flexible pipes for offshore applications and method for producing such cold-rolled narrow strips |
| CN105648310B (en) * | 2016-03-30 | 2017-09-29 | 河北钢铁股份有限公司承德分公司 | A kind of shellproof coil of strip of hot rolling containing vanadium and its production method |
| CN106435147B (en) * | 2016-08-26 | 2018-01-09 | 日照海恩锯业有限公司 | A kind of saw blade air hardening method |
| 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 |
-
2020
- 2020-03-10 CN CN202010161846.9A patent/CN111118412B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111118412A (en) | 2020-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020113951A1 (en) | Tmcp low-temperature steel plate for voc storage tanks of ships and manufacturing method therefor | |
| US20220002849A1 (en) | Low-yield-ratio ultra-high-strength high-toughness steel for pressure hulls and preparation method therefor | |
| AU2019373520A1 (en) | 80 mm large-thickness high-toughness low-alloy wear-resistant steel plate and manufacturing method therefor | |
| CN101358319B (en) | Low carbonaceous steel plate for 610MPa grade high strength pressure vessels and production method thereof | |
| CN108728743B (en) | Ocean engineering steel with good low-temperature fracture toughness and manufacturing method thereof | |
| US20170349987A1 (en) | High-strength steel with yield strength of 800 mpa and production method therefor | |
| CN111455269A (en) | Yield strength 960MPa grade very high strength marine steel plate and manufacturing method thereof | |
| CN108411196B (en) | Tensile strength is 680MPa grades of large-scale mobile steelss for pressure vessel use and production method | |
| CN107287500A (en) | Steel for pressurized water reactor nuclear power station safety injection tank base plate and manufacturing method thereof | |
| CN101413090B (en) | High-strength high-toughness X80 hot rolling coiled sheet for spiral buried arc welding and production method thereof | |
| CN111118412B (en) | Bulletproof steel plate and heat treatment method thereof | |
| CN101591755A (en) | Uncoated tinplate base for acidic food can and manufacture method thereof | |
| CN105441798A (en) | Method for manufacturing Ni steel moderately-thick plate for low-temperature container | |
| CN103820705B (en) | The nuclear power container property heat treatment method of SA508-3 heavy froging | |
| CN103205643A (en) | High-hardness wear-resistant steel plate and manufacturing method thereof | |
| CN109576449A (en) | A kind of production method resisted remanent magnetism and increase, save the 9Ni steel plate of production energy consumption | |
| CN103510017A (en) | Ultrahigh-strength light armor plate and manufacturing method thereof | |
| CN105177445A (en) | Preparation method for high-toughness 3.5Ni steel plate | |
| CN115341138B (en) | High-strength protective steel plate and manufacturing method thereof | |
| CN111363903A (en) | Method for improving Q & P800 steel performance | |
| CN110846593A (en) | Production method of medium-high temperature boiler and pressure vessel steel plate | |
| CN110863139B (en) | Ultralow-temperature-impact-resistant 420 MPa-grade weather-resistant bridge steel and production method thereof | |
| CN114507818A (en) | Thick normalizing ocean engineering structural steel and manufacturing method thereof | |
| CN112962032A (en) | Hot rolled plate for ultrahigh-strength corrosion-resistant automobile transmission shaft pipe and production method thereof | |
| CN112877608A (en) | Hot-rolled automobile steel with yield strength of more than 960MPa and manufacturing method 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Room 12b17 and 12b18, floor 13, gate 7, West Tower, Dacheng Plaza, No. 28, Xuanwumen West Street, Xicheng District, Beijing 100053 Patentee after: Shengpute (Beijing) Protection Technology Co.,Ltd. Address before: 100038 805-2, 8 / F, building 2, 18 YANGFANGDIAN Road, Haidian District, Beijing Patentee before: Shengpute (Beijing) Protection Technology Co.,Ltd. |