High-wear-resistance steel plate and preparation method thereof

Abstract

The invention relates to the technical field of alloys, and provides a high-wear-resistance steel plate and a preparation method thereof. The high-wear-resistance steel plate comprises a base body and a reinforcing phase, and the base body is composed of the following elements of, by weight, 0.05%-0.1% of C, 0.12%-0.25% of Si, 1.2%-1.8% of Mn, 0.1%-0.2% of Cr, 0.006%-0.010% of B, 0.05%-0.06% of Ti, 0.014%-0.038% of Als and the balance Fe and inevitable impurities; the reinforcing phase comprises carbon black coated tungsten trioxide and a metal oxide in a mass ratio of 1: 19-19: 1, and the metal oxide comprises one or more of aluminum oxide, cerium oxide and yttrium oxide. Through the technical scheme, the problem of poor wear resistance of the steel plate in the related technology is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of alloys, and in particular to a high wear-resistant steel plate and a preparation method thereof. Background Art

[0002] Steel plates are flat steel materials that are cast from molten steel, pressed after cooling, and can be cut into the size and shape required for the project through hot rolling or cold rolling. According to thickness, steel plates can be divided into thin steel plates (thickness 0.2~4mm), medium-thick steel plates (thickness 4~60mm), and extra-thick steel plates (thickness 60~115mm); according to different uses and materials, steel plates can be divided into ordinary carbon steel, high-quality carbon structural steel, alloy structural steel, stainless steel, etc.

[0003] The wear resistance of steel plates is one of the most important application properties of steel plates. Good wear resistance of steel plates can improve the bearing capacity and safety of structures such as buildings, bridges, and vehicles. my country's wear-resistant steel is generally divided into high manganese wear-resistant steel, medium and low alloy wear-resistant steel, dual alloy composite wear-resistant steel, chromium-molybdenum-silicon-manganese steel, etc. They have long been bearing the demand for engineering steel. However, with the improvement of the metallurgical industry's requirements for steel plate performance, the wear resistance of steel plates also needs to be further improved. Summary of the invention

[0004] The present invention provides a high wear-resistant steel plate and a preparation method thereof, which solves the problem of poor wear resistance of the steel plate in the related art.

[0005] The technical solution of the present invention is as follows: The present invention provides a high wear-resistant steel plate, comprising a matrix and a reinforcement phase, wherein the matrix is ​​composed of the following elements by weight percentage: C: 0.05% to 0.1%, Si: 0.12% to 0.25%, Mn: 1.2% to 1.8%, Cr: 0.1% to 0.2%, B: 0.006% to 0.010%, Ti: 0.05% to 0.06%, Als: 0.014% to 0.038%, and the balance is Fe and unavoidable impurities; The reinforcing phase includes carbon black-coated tungsten trioxide and metal oxide in a mass ratio of 1:19 to 19:1, and the metal oxide includes one or more of aluminum oxide, cerium oxide, and yttrium oxide.

[0006] As a further technical solution, the raw material of the carbon black coated tungsten trioxide includes carbon black and tungsten trioxide in a mass ratio of 0.05 to 1:20.

[0007] As a further technical solution, the mass ratio of the carbon black to tungsten trioxide is 0.1~0.5:20.

[0008] In the present invention, the mass ratio of carbon black to tungsten trioxide is limited to 0.1-0.5:20, thereby further improving the wear resistance and mechanical properties of the steel plate.

[0009] As a further technical solution, the metal oxide is aluminum oxide.

[0010] In the present invention, the metal oxide is limited to aluminum oxide, thereby further improving the wear resistance and mechanical properties of the steel plate.

[0011] As a further technical solution, the mass of the carbon black-coated tungsten trioxide is greater than or equal to the mass of the metal oxide.

[0012] In the present invention, by limiting the mass of carbon black coated tungsten trioxide to be greater than the mass of metal oxide, the wear resistance and mechanical properties of the steel plate are further improved.

[0013] As a further technical solution, the mass ratio of the carbon black-coated tungsten trioxide and the metal oxide is 11:9~3:1.

[0014] In the present invention, the mass ratio of carbon black-coated tungsten trioxide and metal oxide is limited to 11:9-3:1, thereby further improving the wear resistance and mechanical properties of the steel plate.

[0015] As a further technical solution, the particle size of the carbon black is 11 nm.

[0016] As a further technical solution, the method for preparing carbon black coated tungsten trioxide comprises the following steps: Mix carbon black and tungsten trioxide evenly and grind them to obtain carbon black coated tungsten trioxide.

[0017] The invention further improves the wear resistance and mechanical properties of the steel plate by limiting the preparation method of the carbon black coated tungsten trioxide.

[0018] As a further technical solution, the mass ratio of the matrix to the reinforcement phase is 100:1~3.

[0019] The present invention also provides a method for preparing a high wear-resistant steel plate, comprising the following steps: After the ingredients are prepared according to the composition of the matrix, smelting is carried out, carbon black is added to coat tungsten trioxide for refining, metal oxides are added for slab continuous casting, rolling, and heat treatment to obtain a high wear-resistant steel plate.

[0020] The present invention further improves the wear resistance and mechanical properties of the steel plate by optimizing the adding sequence and adding stage of the carbon black coated tungsten trioxide and the metal oxide.

[0021] The working principle and beneficial effects of the present invention are: In the present invention, carbon black coated tungsten trioxide and metal oxide are selected as the reinforcing phase of the high wear-resistant steel plate. Under high temperature conditions, the carbon black and the coated tungsten trioxide are fully contacted and reacted to form tungsten carbide. As an interstitial phase, tungsten carbide has extremely high hardness and wear resistance. The presence of metal oxide can reduce the occurrence of bite during the use of the steel plate, thereby reducing the wear of the steel plate. By using the carbon black coated tungsten trioxide and metal oxide in combination, while adjusting and optimizing the content between them and the components of the matrix, the wear resistance of the steel plate is effectively improved. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the following examples and comparative examples, the parameters of the raw materials are as follows: The particle size of carbon black is 11nm; The particle size of tungsten trioxide is 1 μm; The particle size of cerium oxide is 50 nm; The model of yttrium oxide is SS-Y430, which was purchased from Hangzhou Jikang New Materials Co., Ltd.; The particle size of aluminum oxide is 1 μm.

[0024] Example 1 A high wear-resistant steel plate comprises a matrix and a reinforcement phase in a mass ratio of 100:3, wherein the matrix is ​​composed of the following elements by weight percentage: C: 0.05%, Si: 0.12%, Mn: 1.2%, Cr: 0.1%, B: 0.006%, Ti: 0.05%, Als: 0.014%, and the balance is Fe and unavoidable impurities; The preparation method thereof comprises the following steps: S1. Mix 0.05 parts of carbon black and 20 parts of tungsten trioxide evenly, grind, and obtain carbon black coated tungsten trioxide; S2. After the ingredients are prepared according to the composition of the matrix, smelting is carried out, carbon black coated tungsten trioxide is added for refining, cerium oxide is added for slab continuous casting, rolling, and heat treatment to obtain a high wear-resistant steel plate, wherein the reinforcing phase is composed of carbon black coated tungsten trioxide and cerium oxide in a mass ratio of 1:19.

[0025] Example 2 A high wear-resistant steel plate comprises a matrix and a reinforcement phase in a mass ratio of 100:1, wherein the matrix is ​​composed of the following elements by weight percentage: C: 0.1%, Si: 0.25%, Mn: 1.8%, Cr: 0.2%, B: 0.010%, Ti: 0.06%, Als: 0.038%, and the balance is Fe and unavoidable impurities; The preparation method thereof comprises the following steps: S1. Mix 1 part of carbon black and 20 parts of tungsten trioxide evenly, grind, and obtain carbon black coated tungsten trioxide; S2. After the ingredients are prepared according to the composition of the matrix, smelting is carried out, carbon black coated tungsten trioxide is added for refining, cerium oxide is added for slab continuous casting, rolling, and heat treatment to obtain a high wear-resistant steel plate, wherein the reinforcing phase is composed of carbon black coated tungsten trioxide and cerium oxide in a mass ratio of 19:1.

[0026] Example 3 The only difference from Example 1 is: 1 part of carbon black and 20 parts of tungsten trioxide.

[0027] Example 4 The only difference from Example 1 is: 0.1 parts of carbon black and 20 parts of tungsten trioxide.

[0028] Example 5 The only difference from Example 1 is: 0.5 parts of carbon black and 20 parts of tungsten trioxide.

[0029] Example 6 The only difference from Example 5 is that cerium oxide is replaced by an equal amount of yttrium oxide.

[0030] Example 7 The only difference from Example 5 is that cerium oxide is replaced by an equal amount of aluminum oxide.

[0031] Example 8 The only difference from Example 7 is that the reinforcing phase is composed of carbon black-coated tungsten trioxide and aluminum oxide in a mass ratio of 19:1.

[0032] Example 9 The only difference from Example 7 is that the reinforcing phase is composed of carbon black-coated tungsten trioxide and aluminum oxide in a mass ratio of 1:1.

[0033] Example 10 The only difference from Example 7 is that the reinforcing phase is composed of carbon black-coated tungsten trioxide and aluminum oxide in a mass ratio of 11:9.

[0034] Embodiment 11 The only difference from Example 7 is that the reinforcing phase is composed of carbon black-coated tungsten trioxide and aluminum oxide in a mass ratio of 3:1.

[0035] Example 12 A high wear-resistant steel plate comprises a matrix and a reinforcement phase in a mass ratio of 100:3, wherein the matrix is ​​composed of the following elements by weight percentage: C: 0.05%, Si: 0.12%, Mn: 1.2%, Cr: 0.1%, B: 0.006%, Ti: 0.05%, Als: 0.014%, and the balance is Fe and unavoidable impurities; The preparation method thereof comprises the following steps: S1. Mix 0.5 parts of carbon black and 20 parts of tungsten trioxide evenly, hot press sinter at 1350°C and 25MPa for 1.5h, and crush to obtain carbon black coated tungsten trioxide; S2. After the ingredients are prepared according to the composition of the matrix, smelting is carried out, carbon black coated tungsten trioxide is added for refining, and alumina is added for slab continuous casting, rolling, and heat treatment to obtain a high wear-resistant steel plate, in which the reinforcement phase is composed of carbon black coated tungsten trioxide and alumina in a mass ratio of 3:1.

[0036] Comparative Example 1 The only difference from Example 1 is that the reinforcing phase is carbon black coated tungsten trioxide.

[0037] Comparative Example 2 The only difference from Example 1 is that the reinforcing phase is cerium oxide.

[0038] Comparative Example 3 A high wear-resistant steel plate comprises a matrix and a reinforcement phase in a mass ratio of 100:3, wherein the matrix is ​​composed of the following elements by weight percentage: C: 0.05%, Si: 0.12%, Mn: 1.2%, Cr: 0.1%, B: 0.006%, Ti: 0.05%, Als: 0.014%, and the balance is Fe and unavoidable impurities; The preparation method thereof comprises the following steps: S1. Mix 0.05 parts of carbon black and 20 parts of tungsten trioxide evenly, grind, and obtain carbon black coated tungsten trioxide; S2. After the ingredients are prepared according to the composition of the matrix, smelting and refining are carried out, and carbon black coated tungsten trioxide and cerium oxide are added to carry out slab continuous casting, rolling, and heat treatment to obtain a high wear-resistant steel plate, wherein the reinforcing phase is composed of carbon black coated tungsten trioxide and cerium oxide in a mass ratio of 1:19.

[0039] Test example The steel plates prepared in Examples 1 to 12 and Comparative Examples 1 to 3 were tested for wear resistance with reference to GB / T 12444-2006 standard, and the block wear specimens were subjected to wear treatment under a pressure of 70 N, with a grinding wheel speed of 200 rpm, a total number of revolutions of 2000 r, and a time of 10 min; the tensile strength was tested with reference to GB / T 228.1-2021 standard, and the results are shown in Table 1.

[0040] Table 1 Performance test results of Examples 1 to 12 and Comparative Examples 1 to 3

[0041] Compared with Comparative Examples 1-2, the reinforcing phase of the steel plates prepared in Example 1 and Examples 3-5 is a combination of carbon black coated tungsten trioxide and metal oxides. As a result, the wear amount of Example 1 and Examples 3-5 is smaller than that of Comparative Examples 1-2, and the tensile strength is greater than that of Comparative Examples 1-2, indicating that the wear resistance and mechanical properties of the steel plates are improved by the combination of carbon black coated tungsten trioxide and metal oxides.

[0042] Compared with Comparative Example 3, the wear amount of the steel plate prepared in Example 1 is smaller than that of Comparative Example 3, and the tensile strength is greater than that of Comparative Example 3, indicating that the addition of carbon black-coated tungsten trioxide during the refining process and the subsequent addition of metal oxides further improve the wear resistance and mechanical properties of the steel plate.

[0043] The wear amount of the steel plates prepared in Examples 4 to 5 is smaller than that in Examples 1 and 3, and the tensile strength is greater than that in Examples 1 and 3, indicating that the mass ratio of carbon black to tungsten trioxide is 0.1 to 0.5:20, which further improves the wear resistance and mechanical properties of the steel plates.

[0044] The wear amount of the steel plate prepared in Example 7 is smaller than that in Examples 5-6, and the tensile strength is greater than that in Examples 5-6, indicating that the metal oxide is aluminum oxide, which further improves the wear resistance and mechanical properties of the steel plate.

[0045] The wear amount of the steel plates prepared in Examples 8 to 11 is smaller than that in Example 7, and the tensile strength is greater than that in Example 7, indicating that the mass of the carbon black-coated tungsten trioxide is ≥ the mass of the metal oxide, which further improves the wear resistance and mechanical properties of the steel plates.

[0046] The wear amount of the steel plates prepared in Examples 10-11 is smaller than that in Examples 8-9, and the tensile strength is greater than that in Examples 8-9, indicating that the mass ratio of carbon black-coated tungsten trioxide and metal oxide is 11:9-3:1, which further improves the wear resistance and mechanical properties of the steel plates.

[0047] The wear amount of the steel plate prepared in Example 11 is smaller than that in Example 12, and the tensile strength is greater than that in Example 12, indicating that the carbon black and tungsten trioxide are mixed evenly and ground to prepare the carbon black-coated tungsten trioxide, which further improves the wear resistance and mechanical properties of the steel plate.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high wear-resistant steel plate, comprising a matrix and a reinforcement phase, characterized in that: The matrix is ​​composed of the following elements by weight percentage: C: 0.05% to 0.1%, Si: 0.12% to 0.25%, Mn: 1.2% to 1.8%, Cr: 0.1% to 0.2%, B: 0.006% to 0.010%, Ti: 0.05% to 0.06%, Als: 0.014% to 0.038%, and the balance is Fe and unavoidable impurities; The reinforcing phase includes carbon black-coated tungsten trioxide and metal oxide in a mass ratio of 1:19 to 19:1, and the metal oxide includes one or more of aluminum oxide, cerium oxide, and yttrium oxide.

2. A high wear-resistant steel plate according to claim 1, characterized in that: The raw materials of the carbon black coated tungsten trioxide include carbon black and tungsten trioxide in a mass ratio of 0.05 to 1:

20.

3. A high wear-resistant steel plate according to claim 2, characterized in that: The mass ratio of the carbon black to tungsten trioxide is 0.1-0.5:

20.

4. A high wear-resistant steel plate according to claim 1, characterized in that: The metal oxide is aluminum oxide.

5. The high wear-resistant steel plate according to claim 1, characterized in that: The mass of the carbon black-coated tungsten trioxide is greater than or equal to the mass of the metal oxide.

6. A high wear-resistant steel plate according to claim 5, characterized in that: The mass ratio of the carbon black coated tungsten trioxide to the metal oxide is 11:9-3:

1.

7. The high wear-resistant steel plate according to claim 2, characterized in that: The particle size of the carbon black is 11 nm.

8. The high wear-resistant steel plate according to claim 1, characterized in that: The method for preparing carbon black coated tungsten trioxide comprises the following steps: Mix carbon black and tungsten trioxide evenly and grind them to obtain carbon black coated tungsten trioxide.

9. The high wear-resistant steel plate according to claim 1, characterized in that: The mass ratio of the matrix to the reinforcement phase is 100:1-3.

10. The method for preparing a high wear-resistant steel plate according to any one of claims 1 to 9, characterized in that: The following steps are involved: After the ingredients are prepared according to the composition of the matrix, smelting is carried out, carbon black is added to coat tungsten trioxide for refining, metal oxides are added for slab continuous casting, rolling, and heat treatment to obtain a high wear-resistant steel plate.

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