CN114657462A - Ultrahigh-strength wear-resistant steel plate and manufacturing method thereof - Google Patents
Ultrahigh-strength wear-resistant steel plate and manufacturing method thereof Download PDFInfo
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- CN114657462A CN114657462A CN202210181749.5A CN202210181749A CN114657462A CN 114657462 A CN114657462 A CN 114657462A CN 202210181749 A CN202210181749 A CN 202210181749A CN 114657462 A CN114657462 A CN 114657462A
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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
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/18—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
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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
- C22C38/18—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
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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
- C22C38/18—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
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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
- C22C38/18—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
Abstract
The invention relates to an ultrahigh-strength wear-resistant steel plate and a manufacturing method thereof, belonging to the technical field of metallurgy. Comprises the following components in percentage by weight: 0.35 to 0.40 percent of C, 0.20 to 0.40 percent of Si, 0.20 to 0.60 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.002 percent of S, 0.020 to 0.050 percent of Al, 0.040 to 0.070 percent of V, 0.010 to 0.030 percent of Ti, 1.20 to 1.40 percent of Cr, 0.4 to 0.6 percent of Mo, 0.40 to 0.60 percent of Ni, 0.0012 to 0.0030 percent of B, and the balance of Fe and inevitable impurities. The invention reduces the usage amount of micro-alloy elements, reduces the cost, improves the performance of the hot working process and plays a role in strengthening the working process by combining and optimizing the use of alloying elements. By utilizing the thermomechanical treatment process, austenite grains are fully refined, the dislocation density is increased, and the precipitation quantity of a second phase is increased, so that higher strength welding performance is obtained under the condition of lower carbon content and alloy components. Thereby obtaining the ultra-high strength wear-resistant steel plate with the thickness of 4-20mm and good ductility and toughness.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to an ultrahigh-strength wear-resistant steel plate and a manufacturing method thereof.
Background
The wear-resistant steel plate has extremely poor working conditions, and is widely applied to mechanical products requiring high strength and high wear resistance, such as bulldozers, loaders, excavators, dump trucks, various mining machines, grab buckets, stacker-reclaimers, conveying bent structures and the like, in engineering, mining, construction, agriculture, cement production, ports, electric power, metallurgy and the like. Depending on the wear mechanism, the wear types can be classified into major types such as adhesive wear, abrasive wear, corrosive wear, and surface fatigue wear, and minor types such as surface erosion, and the like. These different types of wear may occur individually, sequentially or simultaneously (in a composite wear pattern). To obtain good wear resistance, the steel sheet must have high hardness (strength). In order to improve the strength (hardness), most enterprises adopt the component design with high carbon and high alloy content, on one hand, the production and manufacturing cost is increased, the consumption of the alloy, especially the expensive alloy, is larger, on the other hand, the carbon equivalent increase of the alloy is about high, the cracking risk of the production process and the application process of the product is extremely high, and great risk is brought to safe production and reliable operation. In order to realize high strength (hardness), most wear-resistant steels adopt a quenching process to obtain a high-carbon martensite structure, the ductility and toughness of the steel plate are rapidly reduced while the strength (hardness) of the steel plate is improved, and the steel plate has high hardness but general wear resistance when being applied to structures which are contacted with rocks, mineral aggregates and the like and are subjected to friction, impact and scouring.
A great deal of research work is carried out at home and abroad and a great deal of patent documents are formed, and the analysis is as follows:
publication No. CN112195405A discloses an economical corrosion-resistant wear-resistant steel and a preparation method thereof, wherein the chemical components of the steel comprise the following components in percentage by mass: 0.35 to 0.55 percent of carbon, 0.02 to 0.08 percent of silicon, 0.5 to 1.1 percent of manganese, 0.07 to 0.15 percent of phosphorus, less than or equal to 0.004 percent of sulfur, 0.015 to 0.06 percent of aluminum, 0.002 to 0.003 percent of boron, 0.07 to 0.12 percent of antimony, 0.0020 to 0.0035 percent of cerium, 0.015 to 0.025 percent of Ti and/or 0.005 to 0.015 percent of Ca, and the balance of iron and inevitable impurities. The quenching and tempering process obtains the wear-resistant steel plate with the thickness specification of 3-20 mm, the tensile strength of more than 1317MPa, the Brinell hardness of more than 434, and the impact energy of more than 49J at minus 40 ℃. The cost is low, but the defects are that the content of C element is high, the element for improving the plasticity and toughness of the steel plate is lacked, and the hardness and the strength of the steel plate are low.
Publication No. CN113174530A discloses a wear-resistant steel plate and a production method thereof, wherein the steel plate comprises the following chemical components in percentage by weight: 0.15 to 0.18 percent of C, 1.15 to 1.25 percent of Si, 1.73 to 1.83 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.004 percent of S, 0.27 to 0.32 percent of Cr, 0.01 to 0.02 percent of Ti, 0.025 to 0.035 percent of Nb, 0.025 to 0.045 percent of Als, and the balance of Fe and inevitable impurities. The wear-resistant steel plate with the yield strength of more than or equal to 980MPa, the tensile strength of more than or equal to 1400MPa, the elongation of more than or equal to 9 percent and the Brinell hardness of 420-460 percent on the surface of the steel plate is obtained by heating, rolling and coiling. The method has the advantages that precious alloy metals such as Mo and the like are not added, but segregation and subsequent welding cracking are easily caused by high Mn content, and the hardness and the strength of the steel plate are low.
Publication No. CN108611545A discloses a high-strength wear-resistant steel, the chemical components and weight percentage of the steel plate are: 3.9 to 4.5 percent of carbon, 0.6 to 0.8 percent of tungsten, 1.3 to 2.5 percent of copper, 1.2 to 1.8 percent of rare earth, 4 to 6 percent of manganese, 2.9 to 3.9 percent of chromium, 0.7 to 1.5 percent of nickel, 0.02 to 0.04 percent of sulfur and the balance of iron. The steel plate has the advantages of HRC 150-165% hardness, good impact toughness and good comprehensive mechanical properties. But the content of C is as high as 3.9-4.5%, the application is not easy, and the components adopt noble elements such as rare earth, tungsten and the like, thereby greatly increasing the cost of the production process.
Disclosure of Invention
In view of the above problems in the prior art, the present invention provides an ultra-high strength wear resistant steel plate and a method for manufacturing the same, so as to solve the above problems. The invention reduces the usage amount of micro-alloy elements, reduces the cost, improves the performance of the hot working process and plays a role in strengthening the working process by combining and optimizing the use of alloying elements. By utilizing the thermomechanical treatment process, austenite grains are fully refined, the dislocation density is increased, and the precipitation quantity of a second phase is increased, so that higher strength (hardness) welding performance is obtained under the condition of lower carbon content and alloy components. Thereby obtaining the ultra-high strength wear-resistant steel plate with the thickness of 4-20mm and good ductility and toughness.
The technical scheme of the invention is as follows:
an ultrahigh-strength wear-resistant steel plate comprises the following components in percentage by weight: 0.35 to 0.40 percent of C, 0.20 to 0.40 percent of Si, 0.20 to 0.60 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.002 percent of S, 0.020 to 0.050 percent of Al, 0.040 to 0.070 percent of V, 0.010 to 0.030 percent of Ti, 1.20 to 1.40 percent of Cr, 0.4 to 0.6 percent of Mo, 0.40 to 0.60 percent of Ni0, 0.0012 to 0.0030 percent of B, and the balance of Fe and inevitable impurities.
The thickness of the steel plate is 4-20 mm.
The manufacturing method of the ultrahigh-strength wear-resistant steel comprises the following steps:
(1) heating a casting blank; (2) rolling in two stages; (3) accelerated cooling the intermediate material after rolling; (4) performing thermomechanical treatment; (5) and (6) heat treatment.
Preferably, the step (1) is: charging the casting blank at a temperature of not less than 500 ℃, heating for 3.0-5.0 hours, and controlling the discharging temperature of a finished steel plate with the thickness specification of [4,8] mm at 1240-1280 ℃; and for the steel plate with the thickness specification of (8, 20) mm, the tapping temperature is controlled to be 1220-1260 ℃.
Preferably, the step (2) is: and (3) heating the casting blank, then carrying out high-pressure water descaling with the descaling water pressure being more than or equal to 24MPa, and adopting two-stage rolling.
Rolling the steel plate with the thickness specification of [4,8] mm: the rolling temperature of the first stage is 1120-1180 ℃, and the reduction and the deformation permeability are increased in the high-temperature stage; the initial rolling temperature of the second stage is 1080-1120 ℃, and the final rolling temperature is 810-850 ℃; the thickness of the intermediate material after the rolling at this stage was 25 mm.
The thickness specification of the rolled finished product is (8, 12) mm steel plate, wherein the initial rolling temperature of the first stage is 1100-1140 ℃, the rolling reduction and deformation permeability are increased in the high-temperature stage, the initial rolling temperature of the second stage is 1080-1120 ℃, the final rolling temperature is 810-850 ℃, and the thickness of the intermediate material after the rolling of the second stage is 30 mm.
The thickness specification of the rolled finished product is (12, 20) mm steel plate, wherein the initial rolling temperature of the first stage is 1100-1140 ℃, the rolling reduction and deformation permeability are increased in the high-temperature stage, the initial rolling temperature of the second stage is 1080-1120 ℃, the final rolling temperature is 800-840 ℃, and the thickness of the intermediate material after the rolling of the second stage is 40 mm.
Preferably, the step (3) is: and (3) cooling by adopting an ACC mode after rolling, wherein the start cooling temperature is more than or equal to 780 ℃ or more than Ar3+30 ℃, the cooling speed is 4-10 ℃/s, and the final cooling temperature is less than or equal to 300 ℃.
Preferably, the step (4) is: cutting the intermediate material into proper sizes according to the size of the heating furnace and the size of the finished product material, heating the intermediate material in the heating furnace again, and slowly heating the intermediate material at the soaking temperature of 510 +/-20 ℃ for 8 minutes in the soaking section with the heat preservation time of 25 mm; the 30mm intermediate material is 10 minutes; the intermediate material of 40mm is rolled repeatedly for 12 minutes under a small rolling reduction to the target thickness of the finished product after soaking.
Preferably, the step (5) is: quenching and heating at 870-930 ℃, preserving heat for 30-50 min, and discharging and then carrying out water quenching to room temperature; tempering and heating at 180-260 ℃, and keeping the temperature for 30-50 min to obtain the ultrahigh-strength wear-resistant steel plate with the surface Brinell hardness of 650HBW and the tensile strength of more than or equal to 2500 MPa.
The invention has the beneficial effects that:
the invention reduces the usage amount of micro-alloy elements, reduces the cost, improves the performance of the hot working process and plays a role in strengthening the working process by combining and optimizing the use of alloying elements. By utilizing the thermomechanical treatment process, austenite grains are fully refined, the dislocation density is increased, and the precipitation quantity of a second phase is increased, so that higher strength (hardness) welding performance is obtained under the condition of lower carbon content and alloy components.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a metallographic structure chart of a steel plate having a thickness of 6mm in example 1.
FIG. 2 is a metallographic structure chart of a steel plate having a thickness of 10mm in example 2.
FIG. 3 is a metallographic structure drawing of a steel plate of 15mm thickness obtained in example 3.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
In the embodiment 1-3 of the invention, the same heat of casting blank production is adopted, and the chemical components of the casting blank obtained through the processes of KR molten iron pretreatment, converter smelting, LF external refining, RH vacuum refining, casting blank casting and the like are C0.39%, Si 0.27%, Mn0.45%, P0.008%, S0.001%, Al 0.038%, V0.053%, Ti 0.017%, Cr 1.29%, Mo 0.43%, Ni0.52%, B0.0022%, and the balance of Fe and inevitable impurities. The inspection shows that the low-power inspection result of the casting blank is that the center segregation C is 1.5, the center porosity and the crack are avoided, the casting blank pit entering temperature is 676-689 ℃, the casting blank is slowly cooled for 52 hours and then is inspected and rolled, and the temperature of the casting blank is measured to be 520-550 ℃.
The target thickness of the finished steel plate of the embodiment is 6 mm.
(1) Heating of casting blanks
The heating time of the casting blank is 3.8 hours, and the tapping temperature is controlled to be 1265 ℃.
(2) Two stage rolling
The initial rolling temperature of the first stage is 1151 ℃, the initial rolling temperature of the second stage is 1097 ℃, the final rolling temperature is 823 ℃, and the thickness of the intermediate material is 25mm after the rolling is finished.
(3) Accelerated cooling of intermediate after rolling
And cooling in an ACC mode after rolling, wherein the start cooling temperature is 782 ℃, the cooling speed is 9 ℃/s, and the final cooling temperature is 267 ℃.
(4) Thermomechanical treatment
The cutting length of the intermediate material is 4000mm, the thickness is 25mm, the intermediate material is heated in a heating furnace, the soaking temperature is 505 ℃, the average heat preservation time is 8 minutes, the reciprocating longitudinal rolling is carried out for 8 passes (including 1 finishing pass) after the soaking is finished until the target thickness is reached, and the actual thickness is measured to be 6.21 mm.
(5) Thermal treatment
Cutting and segmenting the steel plate, then carrying out quenching heat treatment, keeping the temperature for 30min at the quenching heating temperature of 910 ℃, and carrying out water quenching to room temperature after discharging; tempering and heating at 220 deg.C for 35 min. And then straightening, finishing spray marks, sampling and checking. The results of the physical property measurements are shown in Table 1, and the microstructure morphology is shown in FIG. 1.
Table 1-results of physical property test of steel sheets of example 1
| Sampling site | Tensile strength Rm/MPa | Elongation A/%) | Surface brinell hardness HBW |
| Head with a rotatable shaft | 2635 | 6.5 | 682 |
| In | 2619 | 7 | 673 |
| Tail | 2608 | 7 | 678 |
Example 2
The casting blank used in this example was the same as that of example 1 in heat, and the target thickness of the finished steel sheet in this example was 10 mm.
(1) Heating of casting blanks
The heating time of the casting blank is 4 hours, and the tapping temperature is controlled to be 1245 ℃.
(2) Two stage rolling
The initial rolling temperature of the first stage is 1121 ℃, the initial rolling temperature of the second stage is 1093 ℃, the final rolling temperature is 820 ℃, and the thickness of the intermediate material is 30mm after the rolling is finished.
(3) Accelerated cooling of intermediate after rolling
And cooling in an ACC mode after rolling, wherein the start cooling temperature is 795 ℃, the cooling speed is 7 ℃/s, and the final cooling temperature is 281 ℃.
(4) Thermomechanical treatment
The cutting length of the intermediate material is 3000mm, the thickness is 30mm, the intermediate material is heated in a heating furnace, the soaking temperature is 512 ℃, the average heat preservation time is 10 minutes, the reciprocating longitudinal rolling is performed for 10 passes (including 1 finishing pass) after the soaking is finished until the target thickness is reached, and the measured actual thickness is 9.75 mm.
(5) Thermal treatment
Cutting and segmenting the steel plate, then carrying out quenching heat treatment, wherein the quenching heating temperature is 908 ℃, the heat preservation time is 35min, and water quenching is carried out to room temperature after discharging; tempering and heating at 220 deg.C for 40 min. And straightening, finishing, spraying a mark, sampling and inspecting. The results of the physical property measurements are shown in Table 2, and the microstructure morphology is shown in detail in FIG. 2.
Table 2-results of physical property test of steel sheets of example 2
| Sampling site | Tensile strength Rm/MPa | Elongation A/%) | Surface brinell hardness HBW |
| Head with a rotatable shaft | 2599 | 8 | 664 |
| In | 2618 | 7.5 | 671 |
| Tail | 2613 | 7 | 661 |
Example 3
The casting blank used in the embodiment is the same heat casting blank as that of embodiment 1, and the target thickness of the steel plate finished product is 15 mm.
(1) Heating of casting blanks
The heating time of the casting blank is 4.5 hours, and the tapping temperature is controlled to be 1247 ℃.
(2) Two stage rolling
The initial rolling temperature of the first stage is 1125 ℃, the initial rolling temperature of the second stage is 1097 ℃, the final rolling temperature is 823 ℃, and the thickness of the intermediate material is 40mm after the rolling is finished.
(3) Accelerated cooling of intermediate after rolling
And cooling in an ACC mode after rolling, wherein the start cooling temperature is 802 ℃, the cooling speed is 6 ℃/s, and the final cooling temperature is 278 ℃.
(4) Thermomechanical treatment
The cutting length of the intermediate material is 3000mm, the thickness is 40mm, the intermediate material is heated in a heating furnace, the soaking temperature is 516 ℃, the average heat preservation time is 12 minutes, the reciprocating longitudinal rolling is carried out for 12 passes (including 1 finishing pass) after the soaking is finished until the target thickness is reached, and the measured actual thickness is 14.89 mm.
(5) Thermal treatment
Cutting and segmenting the steel plate, then carrying out quenching heat treatment, wherein the quenching heating temperature is 901 ℃, the heat preservation time is 40min, and discharging and then carrying out water quenching to room temperature; tempering and heating at 220 deg.C for 45 min. And then straightening, finishing spray marks, sampling and checking. The results of the physical property measurements are shown in Table 3, and the microstructure morphology is shown in detail in FIG. 3.
Table 3-example 3 test results of physical properties of steel sheets
| Sampling site | Tensile strength Rm/MPa | Elongation A/%) | Surface brinell hardness HBW |
| Head with a rotatable shaft | 2601 | 7 | 667 |
| In | 2588 | 7.5 | 659 |
| Tail | 2596 | 8 | 655 |
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The ultrahigh-strength wear-resistant steel plate is characterized by comprising the following components in percentage by weight: 0.35 to 0.40 percent of C, 0.20 to 0.40 percent of Si, 0.20 to 0.60 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.002 percent of S, 0.020 to 0.050 percent of Al, 0.040 to 0.070 percent of V, 0.010 to 0.030 percent of Ti, 1.20 to 1.40 percent of Cr, 0.4 to 0.6 percent of Mo0.40 percent of Ni, 0.0012 to 0.0030 percent of B, and the balance of Fe and inevitable impurities.
2. The ultra-high strength, wear resistant steel sheet according to claim 1, having a thickness of 4 to 20 mm.
3. A method for manufacturing the ultra-high strength, wear resistant steel sheet according to claim 1, comprising the steps of:
(1) heating a casting blank; (2) rolling in two stages; (3) accelerated cooling the intermediate material after rolling; (4) performing thermomechanical treatment; (5) and (4) heat treatment.
4. The method for preparing the ultra-high strength, wear resistant steel sheet according to claim 3, wherein the step (1) is: charging the casting blank at a temperature of not less than 500 ℃, heating for 3.0-5.0 hours, and controlling the discharging temperature of a finished steel plate with the thickness specification of [4,8] mm at 1240-1280 ℃; and for the steel plate with the thickness specification of (8, 20) mm, the tapping temperature is controlled to be 1220-1260 ℃.
5. The method for preparing an ultra-high strength, wear-resistant steel sheet as claimed in claim 3, wherein the step (2) is: and (3) heating the casting blank, then carrying out high-pressure water descaling with the descaling water pressure being more than or equal to 24MPa, and adopting two-stage rolling.
6. The method for preparing the ultra-high strength and wear resistant steel plate according to claim 5, wherein the thickness of the rolled finished product is [4,8] mm: the rolling temperature of the first stage is 1120-1180 ℃, and the reduction and the deformation permeability are increased in the high-temperature stage; the initial rolling temperature of the second stage is 1080-1120 ℃, and the final rolling temperature is 810-850 ℃; the thickness of the intermediate material after the rolling at the stage is 25 mm;
the thickness specification of a rolled finished product is (8, 12) mm steel plate, wherein the initial rolling temperature of the first stage is 1100-1140 ℃, the rolling reduction and high deformation permeability are increased in the high-temperature stage, the initial rolling temperature of the second stage is 1080-1120 ℃, the final rolling temperature is 810-850 ℃, and the thickness of an intermediate material after the rolling of the second stage is 30 mm;
the thickness specification of a rolled finished product is (12, 20) mm steel plate, the initial rolling temperature of the first stage is 1100-1140 ℃, the rolling reduction and the high deformation permeability are increased in the high-temperature stage, the initial rolling temperature of the second stage is 1080-1120 ℃, the final rolling temperature is 800-840 ℃, and the thickness of an intermediate material after the rolling of the second stage is finished is 40 mm.
7. The method for preparing an ultra-high strength, wear resistant steel sheet as claimed in claim 3, wherein said step (3) is: and cooling in an ACC mode after rolling, wherein the start cooling temperature is more than or equal to 780 ℃ or more than Ar3+30 ℃, the cooling speed is 4-10 ℃/s, and the final cooling temperature is less than or equal to 300 ℃.
8. The method for preparing the ultra-high strength wear-resistant steel plate according to claim 3, wherein the step (4) is: cutting the intermediate material into proper size according to the size of the heating furnace and the size of the finished product material, heating in the heating furnace again, slowly heating, wherein the soaking temperature is 510 +/-20 ℃, and the soaking section heat preservation time is 25mm, and the intermediate material is 8 minutes; the 30mm intermediate material is 10 minutes; the intermediate material of 40mm is rolled repeatedly for 12 minutes after soaking to the target thickness of the finished product.
9. The method for preparing the ultra-high strength wear-resistant steel plate according to claim 3, wherein the step (5) is: quenching and heating at 870-930 ℃, preserving heat for 30-50 min, and discharging and then carrying out water quenching to room temperature; the tempering heating temperature is 180-260 ℃, and the heat preservation time is 30-50 min.
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| JP2004300474A (en) * | 2003-03-28 | 2004-10-28 | Jfe Steel Kk | Abrasion resistant steel and manufacturing method therefor |
| CN102199737A (en) * | 2010-03-26 | 2011-09-28 | 宝山钢铁股份有限公司 | 600HB-grade wear resistant steel plate and its manufacturing method |
| CN105506504A (en) * | 2014-09-26 | 2016-04-20 | 鞍钢股份有限公司 | Ultrahigh-strength wear-resisting steel plate and production method thereof |
| CN110079745A (en) * | 2019-06-03 | 2019-08-02 | 贝斯山钢(山东)钢板有限公司 | A kind of the HB400 grade wear-resisting steel plate and preparation method of press quenching |
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2022
- 2022-02-25 CN CN202210181749.5A patent/CN114657462B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004300474A (en) * | 2003-03-28 | 2004-10-28 | Jfe Steel Kk | Abrasion resistant steel and manufacturing method therefor |
| CN102199737A (en) * | 2010-03-26 | 2011-09-28 | 宝山钢铁股份有限公司 | 600HB-grade wear resistant steel plate and its manufacturing method |
| CN105506504A (en) * | 2014-09-26 | 2016-04-20 | 鞍钢股份有限公司 | Ultrahigh-strength wear-resisting steel plate and production method thereof |
| CN110079745A (en) * | 2019-06-03 | 2019-08-02 | 贝斯山钢(山东)钢板有限公司 | A kind of the HB400 grade wear-resisting steel plate and preparation method of press quenching |
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