Corrosion-resistant and wear-resistant steel plate and its manufacturing method

Abstract

The present disclosure discloses a corrosion-resistant and wear-resistant steel plate and a manufacturing method thereof. The steel plate contains, by weight percentage, C: 0.15%≦C≦0.25%; Si: 0.10%≦Si≦0.50%; Mn: 0.50%≦Mn≦1.50%; Mo: 0.01%≦Mo≦0.50%; Nb: 0.005%≦Nb≦0.050%; V: 0.01%≦V≦0.10%; Ti: 0.005%≦Ti≦0.050%; Al: 0.010%≦Al≦0.060%; and Cr: 2. 0.00%≦Cr≦5.00%; B: 0.0005%≦B≦0.0050%; and P: 0.010%≦P≦0.030%; and further contains one or more of Cu: 0.10≦Cu≦0.40%, Ni: 0.20≦Ni≦1.00%, RE: 0.01≦RE≦0.10% and Sb: 0.01%≦Sb≦0.20%, with the balance being Fe and unavoidable impurities. The manufacturing method of the steel sheet includes (1) a smelting and casting process, (2) a heating process, (3) a rolling process, and (4) an online cooling process. The steel sheet according to the present disclosure has excellent acid resistance, alkali resistance, and abrasion resistance.

Description

[Technical Field]

[0001] The present disclosure relates to a steel plate and a manufacturing method thereof, and more particularly to a corrosion-resistant and wear-resistant steel plate and a manufacturing method thereof. [Background technology]

[0002] The working conditions of machinery and equipment in the engineering, mining, cement production, ports, power generation and metallurgy industries are extremely harsh, and products such as scraper conveyors and dump truck bodies require high strength, high hardness and high toughness. However, under special working conditions such as industrial waste disposal, the service life of wear-resistant equipment is very short, mainly because the environment caused by the rust and decay of waste makes the equipment very susceptible to corrosion, thereby shortening the service life.

[0003] Research into acid-resistant steel plates is currently underway. For example, a patent with application number 201480021680.3 and title of the invention, "Steel plate for thick, high-strength line pipe and line pipe with excellent acid resistance, crush resistance and low-temperature toughness," provides a steel plate for thick, high-strength line pipe with excellent acid resistance, crush resistance and low-temperature toughness, and a manufacturing method thereof, but the steel plate only has acid resistance.

[0004] Research into alkali-resistant steel plates is also progressing. For example, a patent with application number 201010168491.2 and title of the invention "Alkaline soil corrosion-resistant hot-rolled U-shaped steel sheet pile and manufacturing method thereof" provides alkaline soil corrosion-resistant hot-rolled U-shaped steel sheet pile and manufacturing method thereof, but the steel plate in question is only alkali-resistant.

[0005] However, there are no steel sheets that are both alkali-resistant and acid-resistant, and also have excellent abrasion resistance, so that they can adapt to environmental changes.

[0006] In view of the above-mentioned deficiencies of the prior art, it is desirable to obtain a low-carbon, low-alloy steel plate that combines corrosion resistance and wear resistance, ensures that the material has excellent wear resistance as well as excellent acid resistance and alkali resistance, reduces manufacturing costs, and is suitable for mass production. Summary of the Invention [Problem to be solved by the invention]

[0007] An object of the present invention is to provide a corrosion-resistant and wear-resistant steel plate and a manufacturing method thereof. The corrosion-resistant and wear-resistant steel plate has excellent wear resistance, acid resistance, and alkali resistance, and can meet the requirements for wear resistance and corrosion resistance of steel plates in extremely severe working conditions, while reducing manufacturing costs. [Means for solving the problem]

[0008] In order to achieve the above object, the present disclosure provides a corrosion-resistant wear-resistant steel plate, the corrosion-resistant wear-resistant steel plate comprising, in weight percentage: C: 0.10%≦C≦0.30%; Si: 0.10%≦Si≦0.50%; Mn: 0.50%≦Mn≦1.50%; Mo: 0.01%≦Mo≦0.50%; Nb: 0.005%≦Nb≦0.050%; V: 0.01%≦V≦0.10%; Ti: 0.005%≦Ti≦0.050%; Al: 0.010%≦Al≦0.060%; Cr: 2.00% ≤ Cr ≤ 5.00%; B: 0.0005%≦B≦0.0050%; Sb: 0.01%≦Sb≦0.20%; P: 0.010% ≤ P ≤ 0.030%; Contains Furthermore, it contains one or more of Cu: 0.10≦Cu≦0.40%, Ni: 0.20≦Ni≦1.00%, and RE: 0.01≦RE≦0.10%, with the balance being Fe and unavoidable impurities.

[0009] Another embodiment of the present disclosure is a corrosion-resistant wear steel plate, wherein other than Fe and unavoidable impurities, the steel plate contains, in weight percentages: C: 0.10%≦C≦0.30%; Si: 0.10%≦Si≦0.50%; Mn: 0.50%≦Mn≦1.50%; Mo: 0.01%≦Mo≦0.50%; Nb: 0.005%≦Nb≦0.050%; V: 0.01%≦V≦0.10%; Ti: 0.005%≦Ti≦0.050%; Al: 0.010%≦Al≦0.060%; Cr: 2.00% ≤ Cr ≤ 5.00%; B: 0.0005%≦B≦0.0050%; Sb: 0.01%≦Sb≦0.20%; P: 0.010% ≤ P ≤ 0.030%; Contains Furthermore, it contains one or more of Cu: 0.10≦Cu≦0.40%, Ni: 0.20≦Ni≦1.00%, and RE: 0.01≦RE≦0.10%.

[0010] In some embodiments, the corrosion-resistant and wear-resistant steel plate according to the present disclosure has, by weight percentage, C: 0.15%≦C≦0.25%; Si: 0.10%≦Si≦0.50%; Mn: 0.50%≦Mn≦1.50%; Mo: 0.01%≦Mo≦0.50%; Nb: 0.005%≦Nb≦0.050%; V: 0.01%≦V≦0.10%; Ti: 0.005%≦Ti≦0.050%; and Al: 0.010%≦Al≦ 0.060%; Cr: 2.00%≦Cr≦5.00%; B: 0.0005%≦B≦0.0050%; and P: 0.010%≦P≦0.030%; and further contains one or more of Cu: 0.10≦Cu≦0.40%, Ni: 0.20≦Ni≦1.00%, RE: 0.01≦RE≦0.10% and Sb: 0.01%≦Sb≦0.20%, with the balance being Fe and unavoidable impurities.

[0011] In some embodiments, the corrosion-resistant wear-resistant steel plate of the present invention comprises, in weight percentage: C: 0.10%≦C≦0.30%; Si: 0.25%≦Si≦0.45%; Mn: 0.65%≦Mn≦1.50%; Mo: 0.10%≦Mo≦0.35%; Nb: 0.01%≦Nb≦0.045%; V: 0.01%≦V≦0.08%; Ti: 0.010%≦Ti≦0.045%; Al: 0.020%≦Al≦0.050%; Cr: 2.30% ≤ Cr ≤ 4.60%; B: 0.0015%≦B≦0.0040%; Sb: 0.06%≦Sb≦0.19%; P: 0.010% ≤ P ≤ 0.016%; S: ≤ 0.005%; Cu: ≤0.35%; Ni: ≤ 0.75%; RE: ≤ 0.10%; Contains The balance is Fe and unavoidable impurities.

[0012] Furthermore, in the steel sheet according to the present disclosure, in weight percentage, 0.10≦Mo≦0.40%; 0.010%≦Nb≦0.045%; 0.02%≦V≦0.10%; 0.015%≦Ti≦0.050%.

[0013] Furthermore, in the steel sheet according to the present disclosure, in weight percentage, 2.50%≦Cr≦5.00%; 0.012%≦P≦0.030%; 0.12%≦Cu≦0.40%; 0.20%≦Ni≦0.90%.

[0014] Furthermore, in the steel sheet according to the present disclosure, the unavoidable impurities include S:<0.010% by weight.

[0015] In the corrosion-resistant and wear-resistant steel plate according to the present disclosure, the design principles of each chemical element are as follows (all contents below are expressed as mass percentages).

[0016] Carbon (C): Carbon is the most basic and important element in wear-resistant steel. It can improve the strength and hardness of steel, thereby improving the wear resistance of steel, but is detrimental to the toughness and weldability of steel. Therefore, in this disclosure, the carbon content is controlled to 0.10%≦C≦0.30%, more preferably 0.12%≦C≦0.29%.

[0017] Silicon (Si): Silicon dissolves in ferrite and austenite, improving their hardness and strength. However, excessive silicon content can lead to a rapid decrease in the toughness of steel. Furthermore, silicon has a stronger affinity for oxygen than iron, which can easily generate low-melting-point silicates during welding. This can improve the fluidity of molten slag and molten metal and affect the quality of welds. Therefore, excessive silicon content is undesirable. The silicon content is controlled to 0.10%≦Si≦0.50%, more preferably 0.15%≦Si≦0.50%. In some embodiments, the silicon content is controlled to 0.25%≦Si≦0.45%.

[0018] Manganese (Mn): Manganese significantly improves the hardenability of steel and lowers the transition temperature and critical cooling rate of wear-resistant steel. However, high manganese content tends to coarsen grains and increase the temper embrittlement susceptibility of steel. It also increases the susceptibility of steel to segregation and cracking in cast billets, resulting in reduced steel sheet performance. The manganese content is controlled to 0.50%≦Mn≦1.50%, more preferably 0.60%≦Mn≦1.50%. In some embodiments, the manganese content is controlled to 0.65%≦Mn≦1.50%.

[0019] Molybdenum: Molybdenum can refine crystal particles and improve strength and toughness. Since molybdenum exists in the solid solution phase and carbide phase in steel, molybdenum-containing steel has the effects of both solid solution strengthening and carbide dispersion strengthening. Molybdenum is an element that reduces temper embrittlement and can improve temper stability. Control the molybdenum content to 0.01% ≦ Mo ≦ 0.50%, more preferably 0.10% ≦ Mo ≦ 0.40%.

[0020] Niobium (Nb): Nb significantly contributes to improving the strength and toughness of materials through grain refinement and precipitation strengthening. It is a strong element for forming C and N compounds and strongly inhibits the grain growth of austenite. Nb improves the strength and toughness of steel along with grain refinement. Nb mainly improves and enhances the performance of steel through precipitation strengthening and transformation strengthening, and Nb has already been regarded as one of the most effective strengthening agents in HSLA steel. Therefore, control niobium to 0.005% ≦ Nb ≦ 0.050%, more preferably 0.010% ≦ Nb ≦ 0.045%.

[0021] Vanadium (V): Vanadium is mainly added for the purpose of refining crystal grains so that the crystal grains of steel can be further refined in the subsequent multi-pass rolling process and the strength and toughness of steel can be improved, by growing the austenite crystal grains in the steel billet without being too coarse during the heating stage. Therefore, control the vanadium content to 0.01% ≦ V ≦ 0.10%, more preferably 0.02% ≦ V ≦ 0.10%. In some embodiments, control the vanadium content to 0.01% ≦ V ≦ 0.08%.

[0022] Titanium (Ti): Titanium is one of the strong carbide-forming elements and forms fine TiC particles together with carbon. The TiC particles are fine and distributed at the grain boundaries, which have the effect of refining the crystal grains, and the hard TiC particles improve the wear resistance of the steel. Therefore, control the titanium content to 0.005% ≦ Ti ≦ 0.050%, more preferably 0.015% < Ti ≦ 0.050%.

[0023] Aluminum (Al): Aluminum combines with nitrogen in steel to form fine, refractory AlN particles, thereby refining the grain size of the steel. Aluminum refines the grain size of the steel, immobilizes nitrogen and oxygen in the steel, reduces the notch sensitivity of the steel, reduces or eliminates the aging phenomenon of the steel, and improves the toughness of the steel. Therefore, the aluminum content is controlled to 0.010%≦Al≦0.060%, more preferably 0.015%≦Al≦0.060%. In some embodiments, the aluminum content is controlled to 0.02%≦V≦0.05%.

[0024] Chromium (Cr): Chromium can reduce the critical cooling rate and improve the hardenability of steel. Chromium is present in steel as (Fe,Cr)3C, (Fe,Cr)7C3 and (Fe,Cr) 23 Chromium can form various carbides, such as C7, improving strength and hardness. Chromium can prevent or delay the precipitation and aggregation of carbides during tempering, improving the tempering stability of steel. It can also improve the acid corrosion resistance of steel. In oxidizing media, it forms a strong, dense chromium oxide layer on the steel surface, protecting the steel. Chromium dissolved in steel significantly increases the electrode potential of the steel and reduces electrochemical corrosion caused by differences in electrode potential. Therefore, the chromium content should be controlled within the range of 2.00%≦Cr≦5.00%, and more preferably within the range of 2.50%≦Cr≦5.00%.

[0025] Boron (B): Boron improves the hardenability of steel, but too high a content can cause high-temperature embrittlement, affecting the weldability and thermal processing properties of the steel. Therefore, the B content must be strictly controlled. Therefore, the boron content is controlled to 0.0005%≦B≦0.0050%, more preferably 0.0008%≦B≦0.0050%. In some embodiments, the boron content is controlled to 0.0015%≦B≦0.0040%.

[0026] Antimony (Sb): Antimony can improve the acid corrosion resistance of steel and increase the hardness of the alloy. In an acidic environment, dissolution causes passivation, forming a passivation layer rich in alloying elements such as Sb on the steel surface, resulting in high acid corrosion resistance. Therefore, the antimony content is controlled to 0.01%≦Sb≦0.20%, more preferably 0.03%≦Sb≦0.20%. In some embodiments, the antimony content is controlled to 0.05%≦Sb≦0.20%.

[0027] Copper (Cu): In steel, copper exists primarily in solid solution and in the form of simple precipitates. The dissolved Cu provides solid-solution strengthening. Because the solubility of Cu in ferrite rapidly decreases with decreasing temperature, supersaturated dissolved Cu at low temperatures precipitates as simple precipitates, thereby providing precipitation strengthening. At the same time, adding Cu to steel significantly improves its atmospheric corrosion resistance, a significant improvement that is particularly pronounced when it coexists with phosphorus. Therefore, when copper is added, the copper content should be controlled to 0.10%≦Cu≦0.40%, more preferably 0.12%≦Cu≦0.40%. The phosphorus content should be controlled to 0.010%≦P≦0.030%, more preferably 0.012%≦P≦0.030%.

[0028] Nickel (Ni): Nickel significantly lowers the low-temperature brittle transition temperature, but if its content is too high, the surface oxide scale of the steel sheet becomes difficult to remove and the cost increases significantly. Therefore, when adding nickel, the nickel content should be controlled to 0.20%≦Ni≦1.00%, and more preferably 0.45%≦Ni≦0.8%.

[0029] Rare Earths (RE): Adding rare earths to steel reduces the segregation of elements such as sulfur and phosphorus, improves the shape, size, and distribution of nonmetallic inclusions, refines grain size, and increases hardness. Furthermore, rare earths can improve the corrosion resistance of steel. Too much rare earth content is undesirable because it causes severe segregation and reduces the quality and mechanical performance of the cast billet. Therefore, the RE content should be controlled within the range of 0.01%≦RE≦0.10%, preferably 0.02%≦RE≦0.90%.

[0030] Sulfur: Sulfur is a harmful element and its content must be strictly controlled. In the steel type according to the present disclosure, the sulfur content is controlled to S≦0.010%.

[0031] Furthermore, the Brinell hardness of the steel sheet according to the present disclosure is 350 to 520 HBW, for example 350 to 500 HBW. In some embodiments, the Brinell hardness of the steel sheet according to the present disclosure is 370 to 520 HBW.

[0032] Furthermore, the steel sheet according to the present disclosure contains a lath martensite structure, bainite, and retained austenite, with the volume fraction of bainite being 10 to 40% and the volume fraction of retained austenite being 5 to 15%.

[0033] Furthermore, the thickness of the steel plate according to the present disclosure is 15 to 40 mm. A second aspect of the present disclosure is a method for producing a corrosion-resistant and wear-resistant steel plate, comprising the following steps:

[0034] (1) Smelting and casting processes; (2) heating process; (3) rolling process; (4) Online cooling process.

[0035] In the method for producing a corrosion-resistant and wear-resistant steel plate according to the present disclosure, in the (2) heating step, the slab heating temperature is 1000 to 1200°C, and the temperature is maintained for 1 to 3 hours; in the (3) rolling step, the rough rolling start temperature is 900 to 1150°C (e.g., 1000 to 1100°C), and the finish rolling end temperature is 780 to 880°C (e.g., 810 to 870°C); in the (4) online cooling step, the cooling means may be water cooling, or may be water cooling to 350°C or less (e.g., 150 to 350°C) and then air cooling to room temperature, and the water cooling rate may be 15 to 50°C / s.

[0036] Furthermore, in the steel sheet according to the present disclosure, the finish rolling deformation ratio of the steel sheet is 60 to 80%. [Effects of the Invention]

[0037] Beneficial effects The corrosion-resistant and wear-resistant steel plate and its manufacturing method according to the present disclosure have the following advantages and beneficial effects compared to the prior art: The corrosion-resistant wear-resistant steel plate according to the present disclosure has significant advantages. By controlling the carbon and alloying element contents and each heat treatment process, a wear-resistant steel plate with excellent acid resistance and wear resistance can be obtained, and the steel plate has low cost, simple processing, high hardness, excellent mechanical processing performance, easy welding, and excellent acid corrosion resistance. Specifically: 1. From the perspective of chemical composition, the alloy composition of the corrosion-resistant wear-resistant steel plate disclosed herein is mainly composed of low-carbon low-alloy components, and makes full use of the fine, strengthened characteristics of alloying elements such as Cr, Mo, Ni, Cu, Nb, and Ti to ensure that the steel plate has good mechanical properties and good corrosion resistance. The corrosion-resistant wear-resistant steel plate disclosed herein has the advantages of high strength, high hardness, excellent acid resistance and alkali resistance, and good weldability.

[0038] 2. From the perspective of production process, the corrosion-resistant and wear-resistant steel plate disclosed herein can be produced by controlling process parameters such as the start and finish rolling temperatures, the finish rolling deformation rate, and the cooling rate, thereby refining the structure and enhancing the strengthening effect, thereby reducing the carbon and alloying element content and obtaining a steel plate with excellent mechanical and weldability properties. Furthermore, this process is characterized by a short production process, high efficiency, energy saving, and low cost.

[0039] 3. The corrosion-resistant wear steel plate disclosed herein utilizes alloying elements and controlled rolling and cooling processes to achieve a lath martensite structure and retained austenite, which are advantageous for achieving a good match between the strength, hardness, and toughness of the wear steel plate. The higher the retained austenite content, the higher the self-corrosion potential. The lower the retained austenite content, the lower the self-corrosion potential. However, increasing the retained austenite contributes to improving the corrosion resistance of the material. [Brief explanation of the drawings]

[0040] [Figure 1] FIG. 1 is a metallographic diagram of a steel sheet according to the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0041] Specific Embodiments Hereinafter, embodiments of the present disclosure will be described with reference to specific examples. However, those skilled in the art can easily understand other advantages and effects of the present disclosure based on the contents disclosed herein. Although the description of the present disclosure is presented in conjunction with preferred examples, this does not mean that the features of the present disclosure are limited to only these embodiments. On the contrary, the purpose of describing the invention in conjunction with the embodiments is to cover other options or modifications that may be expanded based on the scope of the claims of the present disclosure. In order to provide a deep understanding of the present disclosure, the following description includes many specific details. The present disclosure can also be practiced without these details. Furthermore, some specific details will be omitted to avoid confusing or obscuring the gist of the present disclosure.

[0042] Examples 1 to 8 and Comparative Example 1 The mass percentages of the corresponding chemical elements in the corrosion-resistant and wear-resistant steel plates according to Examples 1 to 8 and Comparative Example 1 are shown in Table 1.

[0043] [Table 1]

[0044] The corrosion-resistant and wear-resistant steel plates according to Examples 1 to 8 of the present disclosure were manufactured by the following steps: The manufacturing method of the wear-resistant steel plates according to Examples 1 to 8 is as follows: (1) Smelting and casting processes, heating, rolling, online quenching and other processes; (2) In the heating process, the slab heating temperature was 1000-1200°C and kept at that temperature for 1-3 hours; (3) In the rolling process, the starting temperature of rough rolling was 900-1150°C, and the finishing temperature of finish rolling was 780-880°C; (4) In processes such as online quenching, the material was cooled to 350°C (cooling stop temperature) or below by water cooling, and then further air-cooled to room temperature, with the water cooling rate being 15 to 50°C / s.

[0045] The wear-resistant steel plate according to Comparative Example 1 was manufactured by the same steps as those in Examples 1 to 8, except that the raw material composition and the specific process parameters in each step were different from those in Examples 1 to 8. The specific process parameters in Examples 1 to 8 and Comparative Example 1 are shown in Table 2.

[0046] [Table 2]

[0047] The corrosion-resistant and wear-resistant steel plates according to Examples 1 to 8 and Comparative Example 1 were subjected to acid resistance measurement, alkali resistance measurement, and mechanical performance measurement. The obtained measurement results are shown in Tables 3 to 5.

[0048] The acid resistance test was conducted in a constant temperature test chamber at 23±2°C, 10% H2SO4 + 3.5% NaCl, and 24 hours of total immersion. The specific method was based on the JB / T7901-2001 Metallic Materials Testing Laboratory Uniform Corrosion Total Immersion Test Method. The alkali resistance test was carried out in an alkaline atmosphere at a test temperature of 45±2°C, a relative humidity of 70±5%, a circular immersion speed of 1 / 60 (circles / min), and a pH value of 9.5; Brinell hardness measurement: In accordance with GB / T 231.1 standard, Brinell hardness measurement was carried out at room temperature using an SCL246 Brinell hardness tester. The hardness was measured at each surface position of the wear-resistant steel samples of Examples 1 to 8 and Comparative Example 1, and appropriate Brinell hardness values were obtained.

[0049] [Table 3]

[0050] [Table 4]

[0051] [Table 5]

[0052] As can be seen from Tables 1 to 5, the steel sheets according to Examples 1 to 8 obtained by optimizing the chemical elements and controlling the manufacturing process had an acid corrosion rate of at most 0.33 g / (m 2 ·h), and the maximum alkaline corrosion rate is 0.51g / (m 2 ·h) and the hardness (HBW) was at least 375. Although the chemical elements and manufacturing method of Comparative Example 1 were different from those of the present invention, Comparative Example 1 had an acid corrosion rate of 3.51 g / (m 2 ·h), and the alkaline corrosion rate is 2.56g / (m 2·h) and a hardness (HBW) of 235. The acid corrosion rate and alkaline corrosion rate of the steel plate of Comparative Example 1 were much faster than the corrosion rate of the steel plate of the present invention, i.e., it had poor acid and alkali resistance and also poor hardness. In other words, the acid and alkali resistance of the steel plate of the present invention, obtained by optimizing the chemical elements and controlling the manufacturing process, was greatly improved. The wear-resistant steel plate had excellent acid and alkali resistance and a hardness HBW of over 375.

[0053] In summary, by combining a rational chemical composition design with an optimized process, the steel plate according to the present disclosure has excellent acid resistance, alkali resistance, and wear resistance, and the production process is simple, it can be used in harsh working environments, has an improved service life, and is expected to be widely used.

[0054] It should be noted that the prior art portion within the scope of protection of the present disclosure is not limited to the examples described in the application documents, and all prior art that is not inconsistent with the solution of the present disclosure (including, but not limited to, prior patent documents, prior public publications, prior public use, etc.) is incorporated into the scope of protection of the present disclosure. Furthermore, the combinations of the technical features in this application are not limited to the combinations described in the claims of the present application or the combinations described in the specific examples, and all technical features described in this application can be freely combined or combined in any form as long as they are not inconsistent with each other.

[0055] Furthermore, it should be noted that the above-mentioned embodiments are merely specific embodiments of the present disclosure, and the present disclosure is not limited to the above embodiments, and it is clear that any similar changes or modifications that those skilled in the art can directly derive from the disclosure content of the present disclosure or can easily come up with fall within the protection scope of the present disclosure.

Claims

1. In weight percentages, C: 0.15%≦C≦0.25%; Si: 0.10%≦Si≦0.50%; Mn: 0.50%≦Mn≦1.50%; Mo: 0.01%≦Mo≦0.50%; Nb: 0.005%≦Nb≦0.050%; V: 0.01%≦V≦0.10%; Ti: 0.005%≦Ti≦0.050%; Al: 0.010%≦Al≦0.060%; Cr: 2.00%≦Cr≦5.00% B: 0.0005%≦B≦0.0050%; and P: 0.010%≦P≦0.030%; and further containing one or more of Cu: 0.10≦Cu≦0.40%, Ni: 0.20≦Ni≦1.00%, RE: 0.01≦RE≦0.10%, and Sb: 0.01%≦Sb≦0.20%, with the balance being Fe and unavoidable impurities.

2. In addition to Fe and unavoidable impurities, the weight percentages are: 0.10%≦C≦0.30%; 0.10%≦Si≦0.50%; 0.50%≦Mn≦1.50%; 0.01%≦Mo≦0.50%; 0.005%≦Nb≦0.050%; 0.01%≦V≦0.10%; 0.005%≦Ti≦0.050%; 1. A corrosion-resistant and wear-resistant steel plate comprising: 0.010%≦Al≦0.060%; 2.00%≦Cr≦5.00%; 0.0005%≦B≦0.0050%; and P: 0.010%≦P≦0.030%; and further comprising one or more of Cu: 0.10≦Cu≦0.40%, Ni: 0.20≦Ni≦1.00%, RE: 0.01≦RE≦0.10%, and Sb: 0.01%≦Sb≦0.20%.

3. In weight percentages, C: 0.10%≦C≦0.30%; Si: 0.10%≦Si≦0.50%; Mn: 0.50%≦Mn≦1.50%; Mo: 0.01%≦Mo≦0.50%; Nb: 0.005%≦Nb≦0.050%; V: 0.01%≦V≦0.10%; Ti: 0.005%≦Ti≦0.050%; Al: 0.010%≦Al≦0.060%; Cr: 2.00%≦Cr≦5.00% B: 0.0005%≦B≦0.0050%; Sb: 0.01%≦Sb≦0.20%; and P: 0.010%≦P≦0.030%; and further containing one or more of Cu: 0.10≦Cu≦0.40%, Ni: 0.20≦Ni≦1.00% and RE: 0.01≦RE≦0.10%, with the balance being Fe and unavoidable impurities.

4. and / or the following contents, in weight percentages: 0.10%≦Mo≦0.40%; 0.010%≦Nb≦0.045%; 0.02%≦V≦0.10%; 0.015%≦Ti≦0.050%; and / or In weight percentage, 2.50%≦Cr≦5.00%; 0.012%≦P≦0.030%; 0.12%≦Cu≦0.40%; 0.20%≦Ni≦0.90%. The corrosion-resistant and wear-resistant steel plate according to any one of claims 1 to 3.

5. The corrosion-resistant and wear-resistant steel plate according to any one of claims 1 to 3, characterized in that, in weight percentage, the unavoidable impurities contain S: <0.010%.

6. 4. The corrosion-resistant and wear-resistant steel plate according to claim 1, wherein B satisfies the weight percentage 0.0015%≦B≦0.0040%.

7. In weight percentages, C: 0.10%≦C≦0.30%; Si: 0.25%≦Si≦0.45%; Mn: 0.65%≦Mn≦1.50%; Mo: 0.10%≦Mo≦0.35%; Nb: 0.01%≦Nb≦0.045%; V: 0.01%≦V≦0.08%; Ti: 0.010%≦Ti≦0.045%; Al: 0.020%≦Al≦0.050%; Cr: 2.30%≦ 4. The corrosion-resistant and wear-resistant steel plate according to claim 1, characterized in that it contains Cr≦4.60%; B: 0.0015%≦B≦0.0040%; Sb: 0.06%≦Sb≦0.19%; P: 0.010%≦P≦0.016%; S: ≦0.005%; Cu: ≦0.35%; Ni: ≦0.75%; RE: ≦0.10%; and the balance being Fe and unavoidable impurities.

8. The corrosion-resistant and wear-resistant steel plate according to any one of claims 1 to 7, characterized in that the Brinell hardness of the steel plate is 350 to 520 HBW, preferably 350 to 500 HBW.

9. The corrosion-resistant and wear-resistant steel plate according to any one of claims 1 to 8, characterized in that the steel plate comprises a lath martensite structure, bainite, and retained austenite, with the volume fraction of the bainite being 10 to 40% and the volume fraction of the retained austenite being 5 to 15%.

10. A method for producing a corrosion-resistant and wear-resistant steel plate according to any one of claims 1 to 9, comprising the following steps: (1) Smelting and casting processes; (2) Heating process; (3) Rolling process, finish rolling temperature is 780-880°C; (4) Online cooling process.

11. The method for producing a corrosion-resistant and wear-resistant steel plate according to claim 10, wherein the online cooling step (4) is performed by water cooling, and the cooling rate of the water cooling is 15 to 50°C / s.

12. The method for producing a corrosion-resistant and wear-resistant steel plate according to claim 10, wherein in the heating step (2), the slab heating temperature is 1000 to 1200°C and is kept at that temperature for 1 to 3 hours; and in the online cooling step (4), the slab is cooled to 350°C or less by water cooling and then further air-cooled to room temperature.

13. The method for producing a corrosion-resistant and wear-resistant steel plate according to claim 10, wherein the finish rolling deformation rate of the steel plate is 60 to 80%.

14. The method for producing a corrosion-resistant and wear-resistant steel plate according to claim 10, wherein in step (3), the rough rolling start temperature is 900 to 1150°C.

15. (4) The method for producing a corrosion-resistant and wear-resistant steel plate according to claim 12, characterized in that in the rolling step, the steel plate is cooled to 150 to 350°C by water cooling and then further air-cooled to room temperature.

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