Vanadium alloying wear-resistant manganese steel as well as preparation method and application thereof

Abstract

The invention discloses vanadium alloying wear-resistant manganese steel and a preparation method and application thereof, and the vanadium alloying wear-resistant manganese steel comprises the following chemical components in percentage by weight: 1.5%-2.5% of Cr, 1.3%-2.3% of C, 0.1%-4.0% of V, 16%-20% of Mn, 0.2%-0.4% of Si, 0.01%-0.4% of N, less than or equal to 0.003% of P, less than or equal to 0.003% of S and the balance of Fe and inevitable trace elements. Vanadium and nitrogen elements are introduced into the high-manganese steel, the dosage of the vanadium, carbon and nitrogen elements is optimized, and the hardness, strength, toughness, corrosion resistance and abrasion resistance of the high-manganese steel can be improved through the microalloying / alloying effect of the chromium, vanadium, carbon and nitrogen elements.

Description

Technical Field

[0001] The present invention relates to the technical field of steel materials, and in particular to a vanadium alloyed wear-resistant manganese steel and a preparation method and application thereof. Background Art

[0002] Cast wear-resistant high manganese steel has a history of more than 100 years, and both the composition process and the standard system have been nearly perfected. This material has a dominant position in the fields of grinding and crushing machinery, such as cone crusher mortar wall, large and medium-sized wet mining ball mill liner and other components due to its low cost, simple preparation process and relatively good mechanical properties. However, with the development of mechanical engineering equipment towards high-end, the application of cast wear-resistant manganese steel under harsh service conditions has also exposed its own limitations, namely poor corrosion resistance, low initial hardness and strength. These defects limit its further promotion and application in some high-demand application scenarios.

[0003] In order to improve these problems, many studies and engineering practices have attempted to improve the comprehensive performance of cast high manganese steel by alloying methods. Currently in engineering applications, elements such as Cr, Mo, Ti, B, and RE are added to cast high manganese steel in order to improve its hardness, strength, corrosion resistance, and wear resistance. Although these methods have achieved some results to a certain extent, most of them can only achieve the improvement of a single performance indicator and cannot achieve a comprehensive improvement in comprehensive performance. In addition, although studies have shown that adding V elements can improve the hardness and wear resistance of cast high manganese steel, it is still difficult to meet the higher requirements under impact-corrosion-wear interaction conditions in practical applications. Therefore, achieving a synergistic improvement in corrosion resistance, wear resistance, strength, and hardness has become a key way to break through the current difficulties faced by the development of cast wear-resistant high manganese steel.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a vanadium alloyed wear-resistant manganese steel and a preparation method and application thereof, so as to improve the above technical problems.

[0006] The present invention is achieved in that:

[0007] In a first aspect, the present invention provides a vanadium alloyed wear-resistant manganese steel, whose chemical composition, in weight percentage, is: Cr 1.5% to 2.5%, C 1.3% to 2.3%, V 0.1% to 4.0%, Mn 16% to 20%, Si 0.2% to 0.4%, N0.01% to 0.4%, P≤0.003% and S≤0.003%, and the balance is Fe and inevitable trace elements.

[0008] In an optional embodiment, the chemical composition, in weight percentage, is: Cr 1.8%-2.2%, C 1.3%-1.6%, V 0.7%-0.9%, Mn 17%-19%, Si 0.2%-0.4%, N 0.05%-0.15%, P≤0.003% and S≤0.003%, with the remainder being Fe and unavoidable trace elements.

[0009] In an optional embodiment, the chemical composition is, by weight percentage, Cr 2%, C 1.3% to 1.6%, V 0.7% to 0.9%, Mn 18%, Si 0.3%, N 0.05% to 0.15%, P ≤ 0.003% and S ≤ 0.003%, with the remainder being Fe and unavoidable trace elements.

[0010] In a second aspect, the present invention provides a method for preparing a vanadium alloyed wear-resistant manganese steel as described in any one of the aforementioned embodiments, comprising: preparing the vanadium alloyed wear-resistant manganese steel by configuring raw materials according to chemical composition.

[0011] In an optional embodiment, the preparation of the vanadium alloyed wear-resistant manganese steel includes: smelting, casting and heat treating the raw materials in sequence.

[0012] In an optional embodiment, smelting and casting the raw materials include: adjusting the composition of molten steel after melting the raw materials, and then deoxidizing, removing impurities and transferring the molten steel to casting.

[0013] In an optional embodiment, ferrochrome, ferrosilicon, ferromanganese, vanadium-nitrogen alloy, pig iron and wrought iron are melted to test the composition of the molten steel and adjust the composition, and then deoxidized by adding aluminum wire and then impurities are removed by adding perlite slag-forming agent, and then cast after standing.

[0014] In an optional embodiment, the heat treatment is a water toughening treatment; preferably, the temperature of the water toughening treatment is 1050° C. to 1100° C., and the holding time is 3 h to 5 h.

[0015] In an optional embodiment, the water toughening treatment includes: heating the casting from room temperature to 1050°C to 1100°C at a rate of 150°C / h to 250°C / h, keeping the temperature, and then taking the casting out of the furnace for water quenching.

[0016] In a third aspect, the present invention provides a use of the vanadium alloyed wear-resistant manganese steel as described in any one of the aforementioned embodiments in the preparation of wear-resistant components.

[0017] In an alternative embodiment, the wear resistant component is a wet ball mill liner.

[0018] The present invention has the following beneficial effects: by designing the chemical composition of elements such as chromium, vanadium, nitrogen, carbon, manganese, and adjusting the dosage of each component, the vanadium, carbon, and nitrogen elements are used to regulate the organization of high manganese steel, and the vanadium, carbon, and nitrogen elements are used to regulate the matching of hardness-strength-toughness-corrosion resistance-wear resistance of high manganese steel, thereby making the hardness, strength, toughness, corrosion resistance and wear-resistant impact-corrosion-wear performance of wear-resistant manganese steel comprehensively improved, which can provide new ideas for the design of high-performance cast wear-resistant high manganese steel and help upgrade high-end grinding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is the microstructure diagram of the vanadium alloyed wear-resistant manganese steel prepared in Example 1. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0022] The following is a detailed description of a vanadium alloyed wear-resistant manganese steel provided by the present invention and its preparation method and application.

[0023] Some embodiments of the present invention provide a vanadium alloyed wear-resistant manganese steel, whose chemical composition, in weight percentage, is: Cr 1.5% to 2.5%, C 1.3% to 2.3%, V 0.1% to 4.0%, Mn16% to 20%, Si 0.2% to 0.4%, N 0.01% to 0.4%, P≤0.003% and S≤0.003%, and the balance is Fe and unavoidable trace elements.

[0024] By introducing vanadium and nitrogen elements into high manganese steel and adjusting the amount of each component, the vanadium, carbon and nitrogen elements can regulate and control the matching of hardness-strength-toughness-corrosion resistance-wear resistance of high manganese steel, thereby comprehensively improving the hardness, strength, toughness, corrosion resistance and wear resistance impact-corrosion-wear performance of wear-resistant manganese steel, which can provide new ideas for the design of high-performance cast wear-resistant high manganese steel.

[0025] Specifically, the content of V can be 0.05%, 0.25%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, etc.; the content of C can be 1.3%, 1.5%, 1.7%, 1.9%, 2.1%, 2.3%, etc.; the content of N can be 0.02%, 0.05%, 0.1%, 0.15%, 0.20%, 0.25%, 0.30%, 0.35%, 0.4%, etc. The less the content of P and S, the better, and both need to be less than or equal to 0.003%. The inevitable trace elements in the manufacturing process refer to the elements that are inevitably introduced in the preparation process of high manganese steel, and their specific content is also much less than 0.003%. The specific type is not limited, and the impurity types of existing high manganese steel can be referred to.

[0026] Furthermore, in order to further improve the comprehensive properties of vanadium alloyed wear-resistant manganese steel, its chemical composition is optimized. In some embodiments, its chemical composition, by weight percentage, is: Cr 1.8% to 2.2%, C 1.3% to 1.6%, V 0.7% to 0.9%, Mn 17% to 19%, Si 0.2% to 0.4%, N 0.05% to 0.15%, P≤0.003% and S≤0.003%, and the balance is Fe and inevitable trace elements.

[0027] For reference, in some better embodiments, the chemical composition of the vanadium alloyed wear-resistant manganese steel is, by weight percentage, Cr 2%, C 1.3%~1.6%, V 0.7%~0.9%, Mn 18%, Si 0.3%, N 0.05%~0.15%, P≤0.003% and S≤0.003%, with the remainder being Fe and inevitable trace elements.

[0028] Furthermore, some embodiments of the present invention also provide a method for preparing the vanadium alloyed wear-resistant manganese steel as described in any of the aforementioned embodiments, which comprises: preparing the vanadium alloyed wear-resistant manganese steel by configuring raw materials according to chemical composition.

[0029] In some embodiments, preparing vanadium alloyed wear-resistant manganese steel includes: smelting, casting and heat treating the raw materials in sequence.

[0030] Specifically, in some embodiments, the method for preparing the vanadium alloyed wear-resistant manganese steel comprises the following steps:

[0031] S1. Ingredients

[0032] The ingredients are prepared according to the components of the vanadium alloyed wear-resistant manganese steel. For example, the raw materials can be iron, ferrosilicon, ferromanganese, vanadium-nitrogen alloy, pig iron and wrought iron, etc. The specific amounts can be prepared according to the element composition.

[0033] It should be noted that ferrochrome, ferrosilicon, ferromanganese, vanadium nitrogen alloy, pig iron and wrought iron are all commercially available raw materials.

[0034] S2, smelting, casting

[0035] Specifically, in some embodiments, smelting and casting the raw materials include: adjusting the composition of the molten steel after melting the raw materials, that is, testing the composition of the molten steel after the raw materials are melted, adjusting the composition according to the test results so that the elemental composition of the product is more in line with the expected target composition, and then deoxidizing, removing impurities and transferring the molten steel for casting.

[0036] Exemplarily, ferrochrome, ferrosilicon, ferromanganese, vanadium-nitrogen alloy, pig iron and wrought iron are melted to test the composition of the molten steel and adjust the composition, and then deoxidize by adding aluminum wire and remove impurities by adding perlite slag-forming agent, and then cast after standing.

[0037] It should be noted that the specific process parameters for smelting and casting can be selected by referring to the prior art, and will not be described in detail here. Among them, deoxidation and impurity removal can be carried out according to the situation, and the specific method is not limited. Existing deoxidation and impurity removal means can be used, and are not limited here.

[0038] S3. Heat treatment

[0039] Specifically, in some embodiments, the heat treatment is a water toughening treatment. The water toughening treatment can dissolve the carbides in the cast structure of the high manganese steel and obtain a single-phase austenite structure, thereby eliminating the adverse effects of carbides precipitated along the austenite grain boundaries on toughness, significantly improving the toughness of the steel, and enabling it to withstand larger impact loads. And although the initial hardness of the high manganese steel after the water toughening treatment is not high in the state of use, when subjected to severe impact or high pressure, the surface austenite will produce work hardening, accompanied by martensitic phase transformation, which greatly improves the surface hardness and thus exhibits excellent wear resistance. In addition, the high manganese steel has both high toughness and strong work hardening ability after the water toughening treatment. Under the working conditions of impact wear, while forming a hardened layer, the high toughness of the engineering component itself can also be maintained.

[0040] Furthermore, in order to achieve a better heat treatment effect, the temperature of the water toughening treatment is 1050℃~1100℃. For example, it can be selected as 1050℃, 1060℃, 1070℃, 1080℃, 1090℃ or 1100℃, or between any two of the above temperatures. The insulation time is 3h~5h, for example, 3h, 3.5h, 4h, 4.5h or 5h.

[0041] The influence of heating rate on heat treatment is also important. If the heating rate is too fast, the austenite grains of high manganese steel may grow rapidly during the heating process, resulting in coarse grains. Coarse austenite grains will form a larger structure after subsequent cooling, which will reduce the strength and toughness of the steel and make the mechanical properties of the steel worse. A slower heating rate means a longer heating time, which will increase energy consumption and production cycle, reduce production efficiency, and increase production costs. Therefore, in some embodiments, the operation of water toughening treatment is: the casting is heated from room temperature to 1050℃~1100℃ at a rate of 150℃ / h~250℃ / h, and then taken out of the furnace for water quenching after insulation.

[0042] Furthermore, some embodiments of the present invention also provide the use of the vanadium alloyed wear-resistant manganese steel described in any of the above embodiments in the preparation of wear-resistant components. The high manganese steel prepared based on the embodiments of the present invention has excellent hardness, strength, toughness, corrosion resistance and wear resistance, so that the prepared wear-resistant components also have excellent performance.

[0043] Specifically, in some embodiments, the wear-resistant component is a wet ball mill liner.

[0044] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0045] Example 1

[0046] The present embodiment provides a vanadium alloyed wear-resistant manganese steel, whose chemical composition, by weight percentage, is: Cr2.0%, C 1.5%, V 0.8%, Mn 18%, Si 0.3%, N 0.15%, P≤0.003%, S≤0.003%, and the remainder is iron and inevitable trace elements in the manufacturing process.

[0047] This embodiment also provides a method for preparing vanadium alloyed wear-resistant manganese steel, comprising the following steps:

[0048] (1) The raw materials used include ferrochrome, ferrosilicon, ferromanganese, vanadium-nitrogen alloy, pig iron and wrought iron.

[0049] (2) The raw materials are heated to 1470° C., and the composition of the molten steel is tested and adjusted after the raw materials are melted. Aluminum wire is added for deoxidation, and perlite slag-forming agent is added for impurity removal. After that, the raw materials are left to stand for 5 to 8 minutes, and then cast at 1400° C. to obtain a high manganese steel casting.

[0050] (3) After the casting has cooled, it is subjected to water toughening treatment. The temperature is raised from room temperature to 1070°C at a heating rate of 200°C / h and kept at that temperature for 4h, and then taken out of the furnace for water quenching.

[0051] The hardness, yield strength, impact toughness, open circuit potential and corrosion resistance of the high manganese steel prepared by the vanadium alloyed wear-resistant manganese steel and the preparation process described in this embodiment are shown in Table 1.

[0052] Example 2

[0053] The present embodiment provides a vanadium alloyed wear-resistant manganese steel, whose chemical composition, in weight percentage, is: Cr2.0%, C 1.3%, V 0.7%, Mn 18%, Si 0.3%, N 0.05%, P≤0.003%, S≤0.003%, and the balance is iron and inevitable trace elements in the manufacturing process.

[0054] The preparation method of the vanadium alloyed wear-resistant manganese steel provided in this embodiment is the same as that in Example 1.

[0055] The hardness, yield strength, impact toughness, open circuit potential and corrosion resistance of the high manganese steel prepared by the vanadium alloyed wear-resistant manganese steel and the preparation process described in this embodiment are shown in Table 1.

[0056] Example 3

[0057] The present embodiment provides a vanadium alloyed wear-resistant manganese steel, whose chemical composition, by weight percentage, is: Cr2.0%, C 1.6%, V 0.9%, Mn 18%, Si 0.3%, N 0.10%, P≤0.003%, S≤0.003%, and the balance is iron and inevitable trace elements in the manufacturing process.

[0058] The preparation method of the vanadium alloyed wear-resistant manganese steel provided in this embodiment is the same as that in Example 1.

[0059] The hardness, yield strength, impact toughness, open circuit potential and corrosion resistance of the high manganese steel prepared by the vanadium alloyed wear-resistant manganese steel and the preparation process described in this embodiment are shown in Table 1.

[0060] Example 4

[0061] The present embodiment provides a vanadium alloyed wear-resistant manganese steel, whose chemical composition, by weight percentage, is: Cr2.0%, C 1.3%, V 0.9%, Mn 18%, Si 0.3%, N 0.05%, P≤0.003%, S≤0.003%, and the balance is iron and inevitable trace elements in the manufacturing process.

[0062] The preparation method of the vanadium alloyed wear-resistant manganese steel provided in this embodiment is the same as that in Example 1.

[0063] The hardness, yield strength, impact toughness, open circuit potential and corrosion resistance of the high manganese steel prepared by the vanadium alloyed wear-resistant manganese steel and the preparation process described in this embodiment are shown in Table 1.

[0064] Example 5

[0065] The present embodiment provides a vanadium alloyed wear-resistant manganese steel, whose chemical composition, in weight percentage, is: Cr2.0%, C 1.7%, V 2.0%, Mn 18%, Si 0.3%, N 0.2%, P≤0.003%, S≤0.003%, and the balance is iron and inevitable trace elements in the manufacturing process.

[0066] The preparation method of the vanadium alloyed wear-resistant manganese steel provided in this embodiment is the same as that in Example 1.

[0067] The hardness, yield strength, impact toughness, open circuit potential and corrosion resistance of the high manganese steel prepared by the vanadium alloyed wear-resistant manganese steel and the preparation process in the example are shown in Table 1.

[0068] Example 6

[0069] The present embodiment provides a vanadium alloyed wear-resistant manganese steel, whose chemical composition, in weight percentage, is: Cr2.0%, C 2.3%, V 4.0%, Mn 18%, Si 0.3%, N 0.4%, P≤0.003%, S≤0.003%, and the balance is iron and inevitable trace elements in the manufacturing process.

[0070] The preparation method of the vanadium alloyed wear-resistant manganese steel provided in this embodiment is the same as that in Example 1.

[0071] The hardness, yield strength, impact toughness, open circuit potential and corrosion resistance of the high manganese steel prepared by the vanadium alloyed wear-resistant manganese steel and the preparation process described in this embodiment are shown in Table 1.

[0072] Comparative Example 1

[0073] This comparative example provides a vanadium alloyed wear-resistant manganese steel, whose chemical composition, in weight percentage, is: Cr2.0%, C 1.5%, Mn 18%, Si 0.3%, P≤0.003%, S≤0.003%, and the balance is iron and inevitable trace elements in the manufacturing process.

[0074] The preparation method of the vanadium alloyed wear-resistant manganese steel provided in this comparative example is the same as that in Example 1.

[0075] The hardness, yield strength, impact toughness, open circuit potential and corrosion resistance of the high manganese steel prepared by the vanadium alloyed wear-resistant manganese steel and the preparation process described in this comparative example are shown in Table 1.

[0076] Comparative Example 2

[0077] This comparative example provides a vanadium alloyed wear-resistant manganese steel, whose chemical composition, in weight percentage, is: Cr2.0%, C 1.7%, V 0.8%, Mn 18%, Si 0.3%, P≤0.003%, S≤0.003%, and the balance is iron and inevitable trace elements in the manufacturing process.

[0078] The preparation method of the vanadium alloyed wear-resistant manganese steel provided in this comparative example is the same as that in Example 1.

[0079] The hardness, yield strength, impact toughness, open circuit potential and corrosion resistance of the high manganese steel prepared by the vanadium alloyed wear-resistant manganese steel and the preparation process described in this comparative example are shown in Table 1.

[0080] Comparative Example 3

[0081] This comparative example provides a vanadium alloyed wear-resistant manganese steel, whose chemical composition, in weight percentage, is: Cr2.0%, C 1.7%, V 0.2%, Mn 18%, Si 0.3%, P≤0.003%, S≤0.003%, and the balance is iron and inevitable trace elements in the manufacturing process.

[0082] The preparation method of the vanadium alloyed wear-resistant manganese steel provided in this comparative example is the same as that in Example 1.

[0083] The hardness, yield strength, impact toughness, open circuit potential and corrosion resistance of the high manganese steel prepared by the vanadium alloyed wear-resistant manganese steel and the preparation process described in this comparative example are shown in Table 1.

[0084] The vanadium alloyed wear-resistant manganese steel of Example 1 was observed by scanning electron microscopy to observe its structure. The SEM image is as follows: Figure 1 shown.

[0085] The hardness, yield strength, impact toughness, open circuit potential and wear loss of vanadium alloyed wear-resistant manganese steel are tested using the following standards:

[0086] Hardness: GB / T 231 Brinell hardness test for metal materials; Yield strength: GB / T 228 Tensile test for metal materials; Impact toughness: GB / T 229 Charpy pendulum impact test method for metal materials; Open circuit potential: GB / T 6461 Electrochemical corrosion test method for metal materials; Abrasion weight loss rate: T / CFA 010604-3-2016 Impact abrasive wear test method for steel materials.

[0087] Table 1 Test results of hardness, yield strength, impact toughness, open circuit potential and wear loss weight of vanadium alloyed wear-resistant manganese steel

[0088]

[0089] From the results in Table 1, it can be seen that, relatively speaking, the hardness, strength, toughness, corrosion resistance and wear resistance of the high manganese steel prepared in Examples 1-4 are better, and the comprehensive performance of the high manganese steel in Examples 5-6 is reduced compared with that in Examples 1-4 due to the introduction of excessive vanadium, carbon and nitrogen elements. Comparative Examples 1-3 do not introduce vanadium and nitrogen elements or only introduce vanadium elements, and it can also be seen that the comprehensive performance of the high manganese steel is significantly reduced.

[0090] In summary, the embodiments of the present invention introduce chromium, vanadium and nitrogen elements into high manganese steel by designing the composition of elements such as chromium, vanadium and nitrogen, and optimize the dosage of vanadium, carbon and nitrogen elements. The microalloying / alloying effect of chromium, vanadium, carbon and nitrogen elements can be utilized to improve the hardness, strength, toughness, corrosion resistance and wear resistance of high manganese steel, thereby improving the comprehensive performance of high manganese steel. This can provide new ideas for the design of high-performance cast wear-resistant high manganese steel and help upgrade high-end grinding equipment.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vanadium alloyed wear-resistant manganese steel, characterized in that: The chemical composition is, by weight percentage, Cr 1.5% to 2.5%, C 1.3% to 2.3%, V 0.1% to 4.0%, Mn 16% to 20%, Si 0.2% to 0.4%, N 0.01% to 0.4%, P≤0.003% and S≤0.003%, with the remainder being Fe and inevitable trace elements.

2. The vanadium alloyed wear-resistant manganese steel according to claim 1, characterized in that: The chemical composition, in weight percentage, is: Cr 1.8%-2.2%, C 1.3%-1.6%, V 0.7%-0.9%, Mn17%-19%, Si 0.2%-0.4%, N 0.05%-0.15%, P≤0.003% and S≤0.003%, with the remainder being Fe and inevitable trace elements.

3. The vanadium alloyed wear-resistant manganese steel according to claim 1, characterized in that: The chemical composition is, in weight percentage, Cr 2%, C 1.3%-1.6%, V 0.7%-0.9%, Mn 18%, Si 0.3%, N 0.05%-0.15%, P≤0.003% and S≤0.003%, with the remainder being Fe and inevitable trace elements.

4. The method for preparing vanadium alloyed wear-resistant manganese steel according to any one of claims 1 to 3, characterized in that: It includes: The vanadium alloyed wear-resistant manganese steel is prepared by configuring raw materials according to chemical composition.

5. The method for preparing vanadium alloyed wear-resistant manganese steel according to claim 1, characterized in that: The preparation of the vanadium alloyed wear-resistant manganese steel comprises: smelting, casting and heat treating the raw materials in sequence.

6. The method for preparing vanadium alloyed wear-resistant manganese steel according to claim 5, characterized in that: The smelting and casting of raw materials include: adjusting the composition of molten steel after melting the raw materials, deoxidizing and removing impurities from the molten steel, and transferring the molten steel for casting.

7. The method for preparing vanadium alloyed wear-resistant manganese steel according to claim 6, characterized in that: Ferrochrome, ferrosilicon, ferromanganese, vanadium-nitrogen alloy, pig iron and wrought iron are melted to test the composition of the molten steel and adjust the composition. Aluminum wire is added for deoxidation, and perlite slag-making agent is added for impurity removal. The steel is then allowed to stand for casting.

8. The method for preparing vanadium alloyed wear-resistant manganese steel according to any one of claims 5 to 7, characterized in that: The heat treatment is water toughening treatment; preferably, the temperature of the water toughening treatment is 1050° C. to 1100° C., and the insulation time is 3 h to 5 h.

9. The method for preparing vanadium alloyed wear-resistant manganese steel according to claim 8, characterized in that: The water toughening treatment includes: heating the casting from room temperature to 1050°C to 1100°C at a rate of 150°C / h to 250°C / h, keeping the temperature, and then taking the casting out of the furnace for water quenching.

10. Use of the vanadium alloyed wear-resistant manganese steel according to any one of claims 1 to 3 in the preparation of wear-resistant components; Preferably, the wear-resistant component is a wet ball mill liner.

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