CN116254459A - Wear-resistant steel plate with high bending performance and preparation method thereof - Google Patents
Wear-resistant steel plate with high bending performance and preparation method thereof Download PDFInfo
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- 238000000034 method Methods 0.000 claims description 36
- 230000008569 process Effects 0.000 claims description 27
- 238000010791 quenching Methods 0.000 claims description 24
- 230000000171 quenching effect Effects 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000005496 tempering Methods 0.000 claims description 17
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- 238000004519 manufacturing process Methods 0.000 claims description 11
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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
- 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
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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
- 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
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- 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
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a wear-resistant steel plate with high bending performance and a preparation method thereof. The wear-resistant steel plate with high bending performance comprises: A. the fine series and the coarse series in the B, C, D nonmetallic inclusion are not more than 1.5 grade; the band tissue is not greater than grade 2; the carbon equivalent CEV is less than or equal to 0.43. According to the wear-resistant steel plate with high bending performance, the content of residual elements P, S, mn and the like is properly reduced, so that the fine series and the coarse series in A, B, C, D nonmetallic inclusions are not more than 1.5 level, and the band-shaped structure is not more than 2 level, thereby being beneficial to reducing element segregation band aggregation and reducing the occurrence of crack sources; and the carbon equivalent CEV is less than or equal to 0.43 by reasonably adjusting the components, thereby being beneficial to improving the toughness of the wear-resistant steel plate. In conclusion, the bending performance of the wear-resistant steel plate is improved, and the risk of cracking of the wear-resistant steel plate is reduced.
Description
Technical Field
The invention relates to the technical field of wear-resistant steel, in particular to a wear-resistant steel plate with high bending performance and a preparation method thereof.
Background
Wear-resistant steel is a wear-resistant material widely used in various wear conditions, and among them, low alloy wear-resistant steel developed in the seventies of the twentieth century is widely used in departments of mining machinery, engineering machinery, wear-resistant lining plates, agricultural machinery, building materials, electric machinery, railway transportation, etc., such as carriages of dump trucks, cylinders and blades of concrete mixers, and interior lining plates, baffles and bottom plates of various mechanical devices. The wear-resistant steel plate has a severe service environment and requires extremely high strength, hardness and wear resistance. Along with the complicacy and the light weight of various mechanical equipment, the wear-resistant steel plate has higher requirements on the basis of original high strength, high hardness and high wear resistance, and the low-alloy wear-resistant steel plate also has good bending performance, so that the processing and forming capability is ensured.
The wear-resistant steel has a severe working environment, and is required to have enough hardness to resist abrasion, but the wear-resistant steel plate has the disadvantages of toughness and bending performance due to the improvement of the hardness, and is difficult to meet the requirements of equipment large-scale, light-weight and long-service-life manufacturing. In order to meet the market demands to the greatest extent, the wear-resistant steel plate is required to have higher requirements on the performance of the high-strength wear-resistant steel after heat treatment, and has certain toughness, impact damage prevention and excellent cold bending forming performance so as to meet the processing demands. The existing wear-resistant steel plate for the carriage has serious cracking phenomenon in the process of processing, forming and using, and the development of low-alloy wear-resistant steel is restricted to a certain extent.
The wear resistance of the low-alloy wear-resistant steel plate is used for measuring the actual service performance of the steel plate in the service process, and the bending performance of the wear-resistant steel plate is used for measuring the processing and forming performance of the steel plate. With the development of the complexity and the light weight of the carriage of the dumper and the lining plates and parts of various mechanical equipment, the processing and forming capability of the wear-resistant steel plate is more required. At present, bending cracking of the wear-resistant steel plate is still a main factor influencing the processing and forming capacity of the wear-resistant steel, and how to improve the bending performance of the wear-resistant steel plate on the premise of ensuring that the strength and the hardness of the wear-resistant steel plate are not reduced is a key technical problem faced by developing low-alloy wear-resistant steel.
Disclosure of Invention
Based on the above, it is necessary to provide a wear-resistant steel sheet with high bending performance and a method for manufacturing the same, which can improve the above-mentioned defects, aiming at the problems that the wear-resistant steel sheet in the prior art cannot have higher strength, hardness and wear resistance, and simultaneously has better bending performance, so that cracking phenomenon is easy to occur in the process of processing and forming or using.
A high bending performance wear resistant steel sheet, wherein: A. the fine series and the coarse series in the B, C, D nonmetallic inclusion are not more than 1.5 grade; the band tissue is not greater than grade 2; the carbon equivalent CEV is less than or equal to 0.43.
In one embodiment, the weight percentage of N in the wear-resistant steel plate is less than or equal to 0.0040 percent.
In one embodiment, the wear-resistant steel plate comprises the following components in percentage by weight:
c:0.15 to 0.25 percent; si:0.15 to 0.45 percent; mn:1.0 to 1.5 percent; cr:0.1 to 0.5 percent; nb:0.01% -0.05%; ti:0.01 to 0.04 percent; n is less than or equal to 0.0040 percent; p is less than or equal to 0.012%; s is less than or equal to 0.001%; the balance of Fe and unavoidable impurities.
In one embodiment, the thickness of the wear-resistant steel plate is 3 mm-25 mm.
The method for producing a high bending property abrasion-resistant steel sheet according to any one of the above embodiments, comprising the steps of steelmaking, continuous casting to form a blank, rolling, transverse cutting and heat treatment, wherein the steelmaking step comprises an RH refining step.
In one embodiment, in the continuous casting and forming step, when the drawing speed is 1.2-1.8 m/min, the specific water quantity is controlled to be 0.75-L/KG-0.9L/KG.
In one embodiment, the heat treatment step includes a single plate quenching process and a single plate tempering process.
In one embodiment, in the single plate quenching process, the quenching temperature is 870-930 ℃, and the heat preservation time is 10-20 min.
In one embodiment, in the single plate quenching process, the heating time period for heating to the quenching temperature is (1.0 min/mm-1.8 min/mm) x h, wherein h is the thickness of the wear-resistant steel plate.
In one embodiment, in the veneer tempering process, the tempering temperature is 190-250 ℃, and the heat preservation time is 15-30 min.
According to the wear-resistant steel plate with high bending performance and the preparation method thereof, the content of the residual elements P, S, mn and the like is properly reduced, so that the fine series and the coarse series in A, B, C, D nonmetallic inclusions are not more than 1.5 level, and the banded structure is not more than 2 level, thereby being beneficial to reducing element segregation zone aggregation and reducing the occurrence of crack sources; and the carbon equivalent CEV is less than or equal to 0.43 by reasonably adjusting the components, thereby being beneficial to improving the toughness of the wear-resistant steel plate. In conclusion, the bending performance of the wear-resistant steel plate is improved, and the risk of cracking of the wear-resistant steel plate is reduced.
Drawings
Fig. 1 is a flowchart of a method for manufacturing a high bending performance wear resistant steel sheet according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The inventor of the application knows through a large amount of experiments and analysis that obvious segregation bands of Mn, S, P and other elements exist at the crack position of the wear-resistant steel plate, so that the hardness deviation of a local area is large, and crack sources are easy to generate at the obvious change position of the hardness during local stress deformation, so that the cracking is caused. In order to solve the problem that the wear-resistant steel plate is easy to crack.
An embodiment of the present invention provides a wear-resistant steel sheet with high bending performance, in which: A. the fine series and the coarse series in the B, C, D nonmetallic inclusion are not more than 1.5 grade; the band tissue is not greater than grade 2; the carbon equivalent CEV is less than or equal to 0.43.
According to the wear-resistant steel plate with high bending performance, the content of residual elements P, S, mn and the like is properly reduced, so that the fine series and the coarse series in A, B, C, D nonmetallic inclusions are not more than 1.5 level, and the band-shaped structure is not more than 2 level, thereby being beneficial to reducing element segregation band aggregation and reducing the occurrence of crack sources; and the carbon equivalent CEV is less than or equal to 0.43 by reasonably adjusting the components, thereby being beneficial to improving the toughness of the wear-resistant steel plate. In conclusion, the bending performance of the wear-resistant steel plate is improved, and the risk of cracking of the wear-resistant steel plate is reduced.
The carbon equivalent calculation formula is CEV=C+Mn/6+ (Cr+Mo+V)/5+ (Cu+Ni)/15, and the components of the wear-resistant steel plate are adjusted to ensure that CEV is less than or equal to 0.43, so that the toughness of the wear-resistant steel plate is improved, the bending performance of the wear-resistant steel plate is improved, and the risk of cracking of the wear-resistant steel plate is reduced.
Note that, the rating of A, B, C, D nonmetallic inclusions is shown in GB/T10561-2005 "microscopic evaluation method for nonmetallic impurities in steel", and the rating of banded structure is shown in GB/T13299-19 "microscopic evaluation method for steel", and will not be described here.
The inventor of the application also knows through a large amount of experiments and analysis that the phenomenon of inclusion aggregation exists at the fracture of the wear-resistant steel plate, mainly NbN and TiN inclusions, and the aggregation of the inclusions causes stress microcracks to appear in the bending process, and the microcracks are gradually expanded and grown to cause macroscopic cracking of the wear-resistant steel plate. In order to further reduce the cracking risk of the wear-resistant steel plate, in particular to the embodiment, the weight percentage of N in the wear-resistant steel plate is less than or equal to 0.0040 percent, so that NbN, tiN and other impurities are reduced, the aggregation of the impurities is avoided, the occurrence of crack sources is reduced, and the cracking risk of the wear-resistant steel plate is reduced.
Optionally, the wear-resistant steel plate comprises the following components in percentage by weight:
c:0.15 to 0.25 percent; si:0.15 to 0.45 percent; mn:1.0 to 1.5 percent; cr:0.1 to 0.5 percent; nb:0.01% -0.05%; ti:0.01 to 0.04 percent; n is less than or equal to 0.0040 percent; p is less than or equal to 0.012%; s is less than or equal to 0.001%; the balance of Fe and unavoidable impurities.
Alternatively, the wear resistant steel plate has a thickness of 3mm to 25mm. Preferably, the wear resistant steel plate has a thickness of 3mm, 6 mm, 10 mm, 12 mm, 14 mm or 18 mm.
Based on the wear-resistant steel plate with high bending performance, the invention also provides a manufacturing method of the wear-resistant steel plate with high bending performance. Referring to fig. 1, the manufacturing method includes the following steps: s10, steelmaking; s20, continuously casting into a blank; s30, rolling; s40, transversely cutting and flattening; s50, heat treatment. In step S10, an RH refining step is included. In this way, RH refining (fully called RH vacuum circulation degassing refining method) procedures are added in the steelmaking step, so that the content of residual elements (P, S) is reduced, segregation bands formed by element segregation aggregation are reduced, the crack occurrence rate is reduced, and the risk of cracking of the wear-resistant steel plate is reduced.
In the embodiment, in the step S20, when the pulling speed is between 1.2m/min and 1.8m/min, the specific water quantity is controlled between 0.75L/KG and 0.9L/KG, so that the element segregation and inclusion aggregation are reduced by reasonably controlling the proportional relation between the pulling speed of the plate blank and the cooling strength of the secondary cooling zone, the crack occurrence rate is reduced, and the risk of cracking of the wear-resistant steel plate is reduced.
In the embodiment of the invention, the step S50 comprises a single plate quenching process and a single plate tempering process, so that the heat treatment strengthening of the wear-resistant steel plate is finished through the single plate quenching process and the single plate tempering process, wherein the single plate quenching is beneficial to improving the cooling uniformity in the heat treatment process, so that the strength and the hardness of each part of the wear-resistant steel plate are more uniform, and the occurrence of crack sources is reduced; the single plate tempering is favorable for eliminating the internal stress of the wear-resistant steel plate, so that the strength and the toughness reach the matching effect of the optimal state, the bending performance of the wear-resistant steel plate is improved, and the risk of cracking of the wear-resistant steel plate is reduced.
Optionally, in the single plate quenching process, the quenching temperature is 870-930 ℃, and the heat preservation time is 10-20 min. Further, in the single plate quenching process, the heating time period for heating to the quenching temperature is (1.0 min/mm-1.8 min/mm) x h, wherein h is the thickness of the wear-resistant steel plate. Therefore, by reasonably designing the quenching temperature, the heating time and the heat preservation time, the strength and the hardness of the wear-resistant steel plate are more uniform, the occurrence of crack sources is reduced, and the risk of cracking of the wear-resistant steel plate is reduced.
Optionally, in the veneer tempering process, the tempering temperature is 190-250 ℃, and the heat preservation time is 15-30 min. Therefore, by reasonably designing the tempering temperature and the heat preservation time, the internal stress of the wear-resistant steel plate is further eliminated, so that the strength and the toughness reach the matching effect of the optimal state, the bending performance of the wear-resistant steel plate is improved, and the risk of cracking of the wear-resistant steel plate is reduced.
The invention is further illustrated and described below by means of six examples:
in six examples, the abrasion-resistant steel plate is obtained through the steps of steelmaking, continuous casting blank forming, rolling, transverse cutting and heat treatment, and the steelmaking step comprises an RH refining process. In the continuous casting and blank forming step, when the drawing speed is 1.2-1.8 m/min, the specific water quantity is controlled to be 0.75-L/KG-0.9L/KG. The heat treatment step comprises a single plate quenching process and a single plate tempering process. In the single plate quenching process, the quenching temperature is 870-930 ℃, the heating time period for heating to the quenching temperature is (1.0 min/mm-1.8 min/mm) x h, and the heat preservation time period is 10-20 min. In the veneer tempering process, the tempering temperature is 190-250 ℃, and the heat preservation time is 15-30 min.
The thicknesses of the abrasion-resistant steel plates in the six examples were 3mm, 6 mm, 10 mm, 12 mm, 14 mm, 18 mm, respectively, and the following parameters were used: A. the fine series and the coarse series in the B, C, D nonmetallic inclusion are not more than 1.5 grade; the band tissue is not greater than grade 2; the carbon equivalent CEV is less than or equal to 0.43; the wear-resistant steel plate comprises 0.1915% by weight of C, 0.2537% by weight of Si, 1.1083% by weight of Mn, 0.02% by weight of Nb, 0.03% by weight of Ti, 0.0105% by weight of P, 0.0008% by weight of S, 0.1673% by weight of Cr and 0.0030% by weight of N.
The results of the cold bending test of the wear resistant steel plates in the six examples are shown in the following table:
| examples numbering | Thickness of steel plate/mm | Diameter of bending/mm | Bending angle/° | Results |
| Example 1 | 3 | 12 | 180 | No obvious crack |
| Example 2 | 6 | 30 | 180 | No obvious crack |
| Example 3 | 10 | 50 | 180 | No obvious crack |
| Example 4 | 12 | 60 | 180 | No obvious crack |
| Example 5 | 14 | 70 | 180 | No obvious crack |
| Example 6 | 18 | 90 | 180 | No obvious crack |
As can be seen from the above table, the abrasion-resistant steel plates in the six embodiments of the present invention have no obvious cracks in the cold bending experiment. In the invention, RH refining procedures are added in the steelmaking process, so that the content of residual elements (P, S) is reduced; controlling the N content to be less than or equal to 40ppm, and reducing TiN inclusion; the proportion relation between the pulling speed of the plate blank and the cooling strength of the secondary cooling area is reasonably controlled, when the pulling speed is 1.2 m/min-1.8 m/min, the specific water quantity is controlled to be 0.75L/KG-0.9L/KG, the crack occurrence rate is reduced, and the element segregation and the inclusion aggregation are reduced. Reasonably adjusting the components to ensure that the carbon equivalent CEV is less than or equal to 0.43, and improving the toughness of the wear-resistant steel plate; the heat treatment mode of transverse cutting flat, single plate quenching and single plate tempering is adopted, the single plate quenching is beneficial to improving the cooling uniformity in the heat treatment process, the strength and the hardness of the steel plate are more uniform, and the occurrence of crack sources is reduced; the single plate tempering is favorable for eliminating the internal stress of the steel plate, and the strength and the toughness reach the matching effect of the optimal state, so that the bending performance of the wear-resistant steel plate is improved.
That is, the bending performance of the wear-resistant steel plate produced by controlling the process parameters is greatly improved on the premise of ensuring the strength and the hardness, so that the wear-resistant steel plate meets the requirements of more complex equipment for processing and forming, is accelerated to be applied to industries such as mining machinery, engineering machinery, wear-resistant lining plates, agricultural machinery, building materials, electric machinery, railway transportation and the like with higher requirements on the processing and forming performance, and has good application prospects.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The wear-resistant steel plate with high bending performance is characterized in that: A. the fine series and the coarse series in the B, C, D nonmetallic inclusion are not more than 1.5 grade; the band tissue is not greater than grade 2; the carbon equivalent CEV is less than or equal to 0.43.
2. The high bending property wear resistant steel sheet according to claim 1, wherein the weight percentage of N in the wear resistant steel sheet is 0.0040% or less.
3. The high bending wear-resistant steel plate according to claim 1, wherein the wear-resistant steel plate comprises the following components in percentage by weight:
c:0.15 to 0.25 percent; si:0.15 to 0.45 percent; mn:1.0 to 1.5 percent; cr:0.1 to 0.5 percent; nb:0.01% -0.05%; ti:0.01 to 0.04 percent; n is less than or equal to 0.0040 percent; p is less than or equal to 0.012%; s is less than or equal to 0.001%; the balance of Fe and unavoidable impurities.
4. The high bending property abrasion-resistant steel sheet according to claim 1, wherein the thickness of the abrasion-resistant steel sheet is 3mm to 25mm.
5. The method for producing a high bending property abrasion-resistant steel sheet according to any one of claims 1 to 4, comprising the steps of steelmaking, continuous casting, rolling, transverse cutting and heat treatment, wherein the steelmaking step comprises an RH refining step.
6. The method of manufacturing a high bending strength abrasion resistant steel sheet according to claim 5, wherein in the continuous casting and blanking step, the specific water content is controlled to be 0.75L/KG to 0.9L/KG when the drawing speed is 1.2m/min to 1.8 m/min.
7. The method of manufacturing a high bending performance wear resistant steel sheet according to claim 5, wherein the heat treatment step includes a single plate quenching process and a single plate tempering process.
8. The method for manufacturing a high bending property wear-resistant steel sheet according to claim 7, wherein in the single plate quenching step, the quenching temperature is 870-930 ℃, and the heat preservation time is 10-20 min.
9. The method of producing a high bending property abrasion-resistant steel sheet according to claim 8, wherein in the single-plate quenching step, a heating time period for heating to the quenching temperature is (1.0 min/mm to 1.8 min/mm) x h, wherein h is a thickness of the abrasion-resistant steel sheet.
10. The method of manufacturing a high bending strength wear-resistant steel sheet according to claim 7, wherein the tempering temperature is 190 ℃ to 250 ℃ and the heat-retaining period is 15min to 30min in the single-sheet tempering process.
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