Wear-resistant alloy composition and use thereof

Abstract

A wear-resistant alloy composition and the use thereof. The wear-resistant alloy composition comprises: 0.9-2.65 wt% of C, 0.58-1.35 wt% of Si, 0.31-0.45 wt% of Mn, 6.5-11.35 wt% of Cr, 0.25-1.25 wt% of Mo, 7.15-12.65 wt% of V and the balance of Fe and inevitable impurities. The present application does not need powder metallurgy and can achieve direct molding by means of 3D printing. The heat treatment requirements are simpler, such that the heat treatment is easy to operate, that is, a demanding heat treatment process is not needed. The obtained alloy has a HRC63 or higher hardness, and the average friction coefficient at a normal temperature is only about 0.37. Moreover, the wear-resistant alloy composition of the present application is good in terms of welding performance, thereby solving the problem of interlayer cracking during or after the 3D printing or welding process of a high-C-content alloy.

Description

A wear-resistant alloy composition and its application Technical Field

[0001] This invention relates to an alloy composition and its application, and more particularly to a wear-resistant alloy composition with an HRC hardness exceeding 60 and its application. Background Technology

[0002] Wear-resistant alloys are alloys developed to improve the wear resistance of mechanical equipment and are the most commonly used alloys for certain typical friction pairs. They need to have high hardness and wear resistance and are mainly used as tool steels (such as steels for rock drilling and crushing machinery) and bearing steels. Currently, the main types of wear-resistant alloys include nickel-chromium alloys, high-manganese alloys, tungsten carbide alloys, and nickel-tungsten alloys.

[0003] Powder metallurgy high-speed steel has a uniform microstructure and fine grains, eliminating the segregation that is unavoidable in cast high-speed steel. Therefore, it exhibits higher toughness and wear resistance than cast high-speed steel of the same composition. It also boasts advantages such as minimal heat treatment deformation, good forging and rolling properties, and excellent grinding performance, resulting in a comprehensive improvement in steel quality and performance. In the production of powder metallurgy high-speed steel, raw materials are first melted into molten steel with a stable composition. This molten steel is then atomized using high-pressure inert gas or high-pressure water, rapidly forming fine high-speed steel powder particles. These particles are then vacuum sintered, homogenized, annealed, and hot-forged into their final shape.

[0004] PM-9V from the United States is a high-performance powder metallurgy high-speed steel. By reducing the carbon and vanadium content, it improves the toughness and thermal shock resistance of the steel. It is suitable for use in low-alloy tool steels and hot work tool steels where high wear resistance is required, and is widely used in the manufacture of demanding tools and molds.

[0005] However, the heat treatment process for PM-9V differs significantly from that of common mold steels, requiring extremely high precision. Currently known heat treatment processes include vacuum heat treatment to achieve a uniform microstructure and fine grains, resulting in good wear resistance and high strength. However, the manufacturer has not explicitly disclosed the details of its heat treatment process, making it difficult for other manufacturers to obtain the corresponding wear resistance and strength properties. Currently, the MP-9V products offered by the manufacturer are all finished plates, tubes, bars, and other profiles, which are then processed into other products through cutting or machining. Therefore, finding alternative high-wear-resistant alloys and their processing methods remains of great significance.

[0006] In addition, with the development of technologies such as 3D printing, alloys that can be adapted to 3D printing are receiving more and more attention. High C content can bring high strength and other properties. However, it is generally believed in the field that C content exceeding 0.9% is not suitable for 3D printing or welding processes. This is because 3D printing is a layer-by-layer molding method, and alloys with such high C content have very poor welding performance and interlayer cracking will occur. Therefore, solving the weldability of high C content alloys is also a technical problem that the field has been hoping to solve. Summary of the Invention

[0007] This application discloses a wear-resistant alloy composition and its application, particularly an alloy composition with high C content suitable for welding, preferably 3D printing (e.g., LMD, LENS 3D printing) and its application.

[0008] In a first aspect, this application provides a wear-resistant alloy composition, which, based on the total weight of the wear-resistant alloy composition, comprises the following components:

[0009] C 0.9 - 2.65wt%,

[0010] Si 0.58 - 1.35wt%,

[0011] Mn 0.31 - 0.45wt%,

[0012] Cr 6.5 - 11.35wt%,

[0013] Mo 0.25 - 1.25wt%,

[0014] V 7.15 - 12.65wt%,

[0015] The remainder consists of Fe and unavoidable impurities.

[0016] In a preferred embodiment, based on the total weight of the wear-resistant alloy combination, the C content is preferably 1-2.5 wt%, more preferably 1.25-2.3 wt%, more preferably 1.5-2 wt%, and even more preferably 1.65-1.8 wt%.

[0017] In a preferred embodiment, based on the total weight of the wear-resistant alloy assembly, the Si content is preferably 0.6-1.3 wt%, more preferably 0.7-1.2 wt%, more preferably 0.8-1.15 wt%, and even more preferably 0.9-1 wt%.

[0018] In a preferred embodiment, based on the total weight of the wear-resistant alloy combination, the Mn content is preferably 0.33-0.42 wt%, more preferably 0.35-0.4 wt%, and even more preferably 0.36-0.38 wt%.

[0019] In a preferred embodiment, based on the total weight of the wear-resistant alloy combination, the Cr content is preferably 6.7-11.2 wt%, more preferably 6.9-11 wt%, more preferably 7-10.5 wt%, more preferably 7.2-10 wt%, more preferably 7.5-9.5 wt%, more preferably 7.7-9 wt%, and more preferably 8-9 wt%.

[0020] In a preferred embodiment, based on the total weight of the wear-resistant alloy composition, the Mo content is preferably 0.3-1.22 wt%, more preferably 0.35-1.2 wt%, more preferably 0.38-1.18 wt%, more preferably 0.4-1.15 wt%, more preferably 0.45-1.1 wt%, more preferably 0.5-1 wt%, more preferably 0.6-0.9 wt%, and more preferably 0.7-0.8 wt%.

[0021] In a preferred embodiment, based on the total weight of the wear-resistant alloy combination, the V content is preferably 7.2-12.6 wt%, more preferably 7.5-12.5 wt%, more preferably 7.8-12.3 wt%, more preferably 8-12 wt%, more preferably 8.2-12.8 wt%, more preferably 8.5-12.5 wt%, more preferably 8.7-12.2 wt%, more preferably 9-12 wt%, such as 9.5 wt%, 10 wt%, 10.5 wt%, 11 wt%, 11.5 wt%, etc.

[0022] In a preferred embodiment, the wear-resistant alloy composition is a powder. More preferably, the average particle size of the powder can be selected according to the 3D printing parameters, generally preferably 20-500 mesh, and more preferably 50-200 mesh.

[0023] In a preferred embodiment, the wear-resistant alloy composition is a wire (or filament), the diameter of which can be selected according to the 3D printing parameters. Generally, it is preferred to be ≤5mm, more preferably ≤4mm, more preferably ≤3.5mm, for example, 1μm-3.5mm, more preferably 10μm-3mm, more preferably 20μm-2.5mm, more preferably 50μm-2mm, and more preferably 100μm-1.7mm.

[0024] A second aspect of this application is to provide an application of the wear-resistant alloy composition, or, in other words, a method for processing the wear-resistant alloy composition to prepare an alloy; including...

[0025] The wear-resistant alloy composition is formed on the surface of a substrate using 3D printing technology.

[0026] In a preferred embodiment, the matrix may be cast iron or other iron-based alloys, with cast iron being particularly preferred.

[0027] In a preferred embodiment, the 3D printing can be a Directional Energy Deposition (DED) process, such as LMD or LENS.

[0028] More preferably, the application or method further includes: performing a thermal stress relief treatment and / or a tempering treatment after the molding process, but the thermal stress relief treatment and tempering treatment are not mandatory.

[0029] In a preferred embodiment, the heat stress relief treatment refers to heat treatment at 150-300°C, more preferably at 200-250°C.

[0030] In a preferred embodiment, the heat treatment time for relieving thermal stress is preferably 1-6 hours, more preferably 2-5 hours, and even more preferably 3-4 hours.

[0031] In a preferred embodiment, tempering treatment may or may not be selected. Preferably, the tempering treatment can be performed after a process to eliminate thermal stress.

[0032] In a preferred embodiment, the substrate may be preheated before 3D printing, but preheating is not mandatory. If preheating is required, the substrate may be preheated to ≤200°C, more preferably ≤195°C, even more preferably 160-195°C, and even more preferably 170-185°C.

[0033] In a preferred embodiment, the tempering temperature is preferably ≥350℃, more preferably ≥400℃, more preferably 400-800℃, more preferably 450-750℃, more preferably 500-70℃, more preferably 520-680℃, such as 550℃, 580℃, 600℃, 620℃, and 650℃.

[0034] In a preferred embodiment, the tempering treatment time is preferably ≥1 hour, more preferably ≥3 hours.

[0035] In a preferred embodiment, the 3D printing laser power of the LMD or LENS is preferably at least 1000W, preferably at least 1500W, more preferably at least 2000W, or at least 3000W, for example at least 4000W.

[0036] Preferably, the 3D printing cladding thickness of the LMD or LENS is 0.01-3 mm / layer, more preferably 0.05-2.8 mm / layer, more preferably 0.1-2.5 mm / layer, more preferably 0.5-2.2 mm / layer, more preferably 0.8-2 mm / layer, more preferably 1-1.8 mm / layer, and more preferably 1.2-1.5 mm / layer.

[0037] In a preferred embodiment, the cladding width of the 3D printed LMD or LENS is 0.05-5mm, more preferably 0.1-4mm, more preferably 0.5-3mm, more preferably 1-2.5mm, and more preferably 1.5-2mm.

[0038] In a preferred embodiment, the overlap range of the 3D printed LMD or LENS is controlled to be ≤2.5mm, more preferably ≤2mm, more preferably ≤1.8mm, more preferably ≤1.5mm, and more preferably ≤1.2mm.

[0039] The wear-resistant alloy composition described in this application can be a filament material. The filament feeding speed in 3D printing can be determined according to the cladding thickness, and is generally preferably 0.1-5 m / min, more preferably 0.2-4.5 m / min, more preferably 0.4-4 m / min, more preferably 0.5-3.5 m / min, more preferably 0.7-3 m / min, more preferably 0.9-2.5 m / min, and more preferably 1-2 m / min.

[0040] The wear-resistant alloy composition described in this application can be a powder material. The powder feeding speed for 3D printing can be determined according to the cladding thickness. Generally, it is preferably 0.1-5 g / min, more preferably 0.5-4.5 g / min, more preferably 1-4 g / min, more preferably 1.5-3.8 g / min, more preferably 2-3.5 g / min, and more preferably 2.5-3 g / min.

[0041] Compared with PM-9V, the advantages of this application are: no powder metallurgy is required, it can be directly formed by DED 3D printing, the heat treatment requirements are simpler and easier to operate, and no harsh heat treatment process is required.

[0042] Moreover, compared with general high-C content alloys, the wear-resistant alloy composition of this application has good weldability and does not exhibit interlayer cracking during or after 3D printing or welding. Combined with DED 3D process, it solves the problem of interlayer cracking during or after 3D printing or welding caused by poor weldability of high-C content alloys.

[0043] The alloy obtained in this application has a hardness of HRC63 or higher, good wear resistance, and an average friction coefficient of only about 0.37 at room temperature.

[0044] Instruction manual illustrations

[0045] Figure 1 shows the results of friction and wear tests on the wear-resistant alloy obtained in this invention at room temperature.

[0046] Figure 2 shows the results of the friction and wear test of the wear-resistant alloy obtained in this invention at 400℃.

[0047] Figure 3 is a schematic diagram of the DED 3D printing process of the present invention. Detailed Implementation

[0048] This invention provides a wear-resistant alloy composition, particularly an alloy composition suitable for 3D printing, especially for DED (Direct Energy Deposition) 3D processes such as LMD and LENS, as well as a method for preparing the wear-resistant alloy composition. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or apparatuses. The term "at least" in this invention means greater than or equal to.

[0050] Carbon content is a major factor affecting microstructure. Carbon can form carbides with other elements, thereby increasing the hardness of the alloy. However, generally speaking, a carbon content exceeding 0.9 wt% is considered unsuitable for welding processes (such as welding surfacing and 3D printing) because the welding performance is poor and cracking occurs, especially in the case of 3D printing, where interlayer cracking is more likely to occur. This invention utilizes a high carbon content and a specific combination with other alloying elements to solve the problem of poor welding performance under high carbon content conditions. High wear-resistant and high-hardness alloys can be directly obtained through 3D printing, with a carbon content of 0.9-2.65 wt%.

[0051] Si can refine the matrix structure. Therefore, an appropriate amount of Si can also improve hardness and wear resistance. However, excessive silicon will reduce plasticity and toughness and reduce processing performance, making it easy to crack during 3D printing. Therefore, in this patent, the Si content is preferably controlled between 0.58 and 1.35 wt%.

[0052] Mn can improve carbon penetration, thereby improving the wear resistance and hardness of alloy steel. However, Mn will deteriorate the weldability of steel, causing cracks and other defects, which is not conducive to processes such as 3D printing and welding. Moreover, it will significantly increase brittleness, especially temper brittleness. In this patent, the Mn content is preferably controlled at 0.31-0.45wt%. Within this range, better hardness and wear resistance can be obtained, and the amount of precious metals such as Mo can be reduced.

[0053] Mo can improve the hardenability of steel, refine its microstructure, and enhance its strength and hardness. However, Mo promotes decarburization, shrinks the austenite phase region, introduces a ferrite phase, reduces toughness, and decreases thermal conductivity. Furthermore, Mo is expensive. In this patent, the Mo content is 0.25-1.25 wt%. Through the combination of other elements such as Cr, Si, Mn, V, and C, the Mo content is controlled at a low level, reducing the cost of the wear-resistant alloy.

[0054] Cr can induce the formation of a passivation film of ferrochromium oxide in carbon steel in oxidizing media, which is firmly bonded to the matrix structure, thereby increasing wear resistance and corrosion resistance. Furthermore, Cr can reduce the stacking fault energy of alloys. However, excessively high Cr content can lead to the precipitation of α-Cr. This patent recommends controlling the Cr content to 6.5-11.35 wt% to ensure that Cr exists in a solid solution state in the matrix. Simultaneously, the combination of Cr and Mo can reduce the amount of Mo used, thus lowering costs.

[0055] V can form hard, stable VC carbide particles, strengthening grain boundaries and intergranular spaces. It can also act as a grain refiner, reducing grain size and improving toughness and heat treatment performance. However, the formation of VC reduces alloying density, thereby decreasing hardness. In this patent, the V content is controlled between 7.15 and 12.65 wt%. Within this range, in addition to forming carbides with C, V can be compounded with other elements to solve cracking problems during 3D printing and welding, and reduce the amount of precious metals such as Mo used.

[0056] This application employs DED 3D printing processes such as LMD or LENS to achieve the 3D printing of the wear-resistant alloy composition. LMD is Laser Metal Deposition, and LENS is Laser Engineered Net Shaping. Referring to Figure 3, DED 3D printing uses coaxial feed powder material. Taking powder as an example, during the forming process, the wear-resistant alloy composition powder 2 is uniformly gathered onto the working plane of the workpiece 4 through a nozzle. Simultaneously, the laser beam 1 is coaxially coupled with the powder material and outputs, and the laser beam 1 is also focused on the powder material gathering point. The laser beam 1 heats the surface of the workpiece 4 to form a molten pool 3. The wear-resistant alloy composition powder 2 is sprayed into the molten pool 3, cladding and depositing. By moving the worktable or nozzle, the deposited clad entity can be obtained. Unexpectedly, the wear-resistant alloy composition of this application, combined with the above-mentioned DED 3D printing process, solves the problem of poor weldability of high C (above 0.9wt%) alloys. However, this composition cannot yet be used for SLM laser additive manufacturing because it is prone to cracking and cannot be formed under the conditions of this process. The specific principle is not yet clear.

[0057] Example 1

[0058] In this embodiment, the wear-resistant alloy composition is 200-mesh powder, and its weight composition is as follows:

[0059] C 0.95wt%,

[0060] Si 0.7wt%,

[0061] Mn 0.33wt%,

[0062] Cr 7wt%,

[0063] Mo 0.45wt%,

[0064] V 7.5wt%,

[0065] The remainder is Fe.

[0066] Using #45 steel as the substrate, a wear-resistant alloy layer is formed on the surface of the substrate using the LMD process. The LMD process is as follows:

[0067] A wear-resistant alloy composition is coated onto the substrate surface, and the wear-resistant alloy composition is sintered using the LMD (Laser Density Modulation) process to form a wear-resistant alloy layer. The LMD cladding width is 1 mm, the laser power is 3000 W, the overlap is 0.8 mm, and the cladding thickness of each layer is 1.5 mm.

[0068] Heat treatment at 200℃ for 2 hours to eliminate thermal stress. Example 2

[0069] In this embodiment, the wear-resistant alloy composition is a welding wire with a diameter of 1.75 mm, and its weight composition is as follows:

[0070] C 1.45wt%,

[0071] Si 1.07wt%,

[0072] Mn 0.35wt%,

[0073] Cr 7.5wt%,

[0074] Mo 0.35wt%,

[0075] V 8.5wt%,

[0076] The remainder is Fe.

[0077] Using #45 steel as the substrate, a wear-resistant alloy layer is formed on the surface of the substrate using the LMD process. The LMD process is as follows:

[0078] Preheat the substrate to 180°C.

[0079] A wear-resistant alloy composition is coated onto the substrate surface, and the wear-resistant alloy composition is sintered using the LMD process to form a wear-resistant alloy layer. The LMD cladding width is 2mm, the laser power is 2500W, the overlap is 1mm, and the cladding thickness of each layer is 1.5mm.

[0080] Heat treatment at 200℃ for 3 hours to eliminate thermal stress. Example 3

[0081] In this embodiment, the wear-resistant alloy composition is 200-mesh powder, and its weight composition is as follows:

[0082] C 2.25wt%,

[0083] Si 0.63wt%,

[0084] Mn 0.38wt%,

[0085] Cr 7.7wt%,

[0086] Mo 0.39wt%,

[0087] V 8.2wt%,

[0088] The remainder is Fe.

[0089] Using #45 steel as the substrate, a wear-resistant alloy layer is formed on the substrate surface using the LENS process. The LENS process is as follows:

[0090] A wear-resistant alloy composition is coated onto the substrate surface, and then sintered using the LENS process to form a wear-resistant alloy layer. The LMD cladding width is 2mm, the laser power is 2000W, the overlap is 1.2mm, and the cladding thickness of each layer is 1.5mm.

[0091] Heat treatment at 200℃ for 2 hours to eliminate thermal stress.

[0092] Table 1. Hardness test results of alloys obtained in Examples 1-3

[0093]

[0094] It can be seen that this application can achieve MP-9V hardness without special heat treatment processes, and the processing technology is simpler. Moreover, it can maintain its hardness and prevent cracking even in multi-layer 3D printing, and it has good bonding with the #45 steel matrix, solving the problem of poor welding performance of high C alloys. Example 4

[0095] In this embodiment, the wear-resistant alloy composition is 150-mesh powder, and its weight composition is as follows:

[0096] C 1.55wt%,

[0097] Si 1.23wt%,

[0098] Mn 0.41wt%,

[0099] Cr 9.2wt%,

[0100] Mo 0.42wt%,

[0101] V 8.5wt%,

[0102] The remainder is Fe.

[0103] Using GGG70L steel as the substrate, a wear-resistant alloy layer is formed on the substrate surface using the LENS process. The LENS process is as follows:

[0104] A wear-resistant alloy composition is coated onto the substrate surface, and then sintered using the LENS process to form a wear-resistant alloy layer. The LENS cladding width is 1.5 mm, the laser power is 2000 W, the overlap is 1.2 mm, and the thickness of each cladding layer is 1.3 mm.

[0105] Heat treatment at 200℃ for 3 hours to eliminate thermal stress.

[0106] Example 5

[0107] In this embodiment, the wear-resistant alloy composition is 250-mesh powder, and its weight composition is as follows:

[0108] C 1.75wt%,

[0109] Si 0.91wt%,

[0110] Mn 0.36wt%,

[0111] Cr 7.7wt%,

[0112] Mo 0.32wt%,

[0113] V 12.3wt%,

[0114] The remainder is Fe.

[0115] Using GGG70L steel as the substrate, a wear-resistant alloy layer is formed on the substrate surface using the LMD process. The LMD process is as follows:

[0116] The wear-resistant alloy composition is coated on the substrate surface, and the wear-resistant alloy composition is sintered using the LMD process to form a wear-resistant alloy layer. The LMD cladding width is 2.2mm, the laser power is 1500W, the overlap is 1.3mm, and the cladding thickness of each layer is 1.5mm.

[0117] Example 6

[0118] In this embodiment, the wear-resistant alloy composition is 200-mesh powder, and its weight composition is as follows:

[0119] C 1.21wt%,

[0120] Si 0.77wt%,

[0121] Mn 0.33wt%,

[0122] Cr 10.2wt%,

[0123] Mo 0.36wt%,

[0124] V 10.3wt%,

[0125] The remainder is Fe.

[0126] Using GGG70L steel as the substrate, a wear-resistant alloy layer is formed on the substrate surface using the LMD process. The LMD process is as follows:

[0127] A wear-resistant alloy composition is coated onto the substrate surface, and the wear-resistant alloy composition is sintered using the LMD process to form a wear-resistant alloy layer. The LMD cladding width is 1.8 mm, the laser power is 3000 W, the overlap is 1.2 mm, and the cladding thickness of each layer is 1.6 mm.

[0128] Heat treatment at 200℃ for 3 hours to eliminate thermal stress.

[0129] Table 2. Hardness test results of alloys obtained in Examples 3-6

[0130]

[0131] It can be seen that 3D printing on a GGG70L steel substrate can achieve a hardness comparable to MP-9V without requiring special heat treatment. Furthermore, it exhibits good bonding with the substrate, excellent weldability, and no cracking occurred during multi-layer 3D printing, while maintaining its good hardness, thus solving the problem of poor weldability of high-C alloy steel.

[0132] Example 7

[0133] In this embodiment, the wear-resistant alloy composition is 200-mesh powder, and its weight composition is as follows:

[0134] C 1.15wt%,

[0135] Si 0.82wt%,

[0136] Mn 0.35wt%,

[0137] Cr 8.5wt%,

[0138] Mo 0.35wt%,

[0139] V 9.5wt%,

[0140] The remainder is Fe.

[0141] The wear-resistant alloy composition is formed on the surface of the substrate using the LMD process. The LMD process is as follows:

[0142] The wear-resistant alloy composition is covered on the surface of the support structure, and the wear-resistant alloy composition is sintered using the LMD process to form a wear-resistant alloy layer. The LMD cladding width is 2mm, the laser power is 3000W, the overlap is 1.2mm, and the cladding thickness of each layer is 1.5mm.

[0143] The obtained wear-resistant alloy was subjected to friction and wear tests, including friction and wear tests under normal temperature (25℃) and high temperature (400℃) conditions.

[0144] Table 3. Results of friction and wear tests

[0145]

[0146] As can be seen from Table 3 and Figures 1 and 2, the wear-resistant alloy obtained by this invention has an average friction coefficient of only about 0.37 at room temperature and an average friction coefficient of only about 0.26 at high temperature, exhibiting excellent wear resistance.

[0147] In summary, this application eliminates the need for powder metallurgy processing and special heat treatment processes required for MP-9V. Utilizing the widely adopted DED 3D printing technology, it achieves hardness and wear resistance comparable to MP-9V, with a simpler and easier-to-operate processing method. Furthermore, this application solves the problems of poor weldability and easy cracking in high-C content alloys through specific element ratios, enabling the welding and 3D printing of high-hardness, high-wear-resistant alloy steels.

[0148] The products obtained in the above embodiments of this application can also be tempered to further improve some mechanical properties, such as toughness.

[0149] The specific embodiments of the present invention have been described in detail above, but they are merely examples, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, all equivalent transformations and modifications made without departing from the spirit and scope of the present invention should be covered within the scope of the present invention.

Claims

1. A wear-resistant alloy composition, characterized in that, include: Based on the total weight of the wear-resistant alloy assembly, it comprises the following components: C 0.9 - 2.65% by mass Si 0.58 - 1.35% by mass Mn 0.31 - 0.45% by mass Cr 6.5 - 11.35% by mass Mo 0.25 - 1.25% by mass V 7.15 - 12.65% by weight The remainder consists of Fe and unavoidable impurities.

2. The wear-resistant alloy composition according to claim 1, characterized in that, Based on the total weight of the wear-resistant alloy combination, the C content is preferably 1-2.5% by mass, more preferably 1.25-2.3% by mass, even more preferably 1.5-2% by mass, and even more preferably 1.65-1.8% by mass.

3. The wear-resistant alloy composition according to claim 1, characterized in that, Based on the total weight of the wear-resistant alloy combination, the Si content is preferably 0.6-1.3% by mass, more preferably 0.7-1.2% by mass, more preferably 0.8-1.15% by mass, and even more preferably 0.9-1% by mass.

4. The wear-resistant alloy composition according to claim 1, characterized in that, Based on the total weight of the wear-resistant alloy combination, the Mn content is preferably 0.33-0.42% by mass, more preferably 0.35-0.4% by mass, and even more preferably 0.36-0.38% by mass.

5. The wear-resistant alloy composition according to claim 1, characterized in that, Based on the total weight of the wear-resistant alloy combination, the Cr content is preferably 6.7-11.2% by mass, more preferably 6.9-11% by mass, more preferably 7-10.5% by mass, more preferably 7.2-10% by mass, more preferably 7.5-9.5% by mass, more preferably 7.7-9% by mass, and more preferably 8-9% by mass.

6. The wear-resistant alloy composition according to claim 1, characterized in that, Based on the total weight of the wear-resistant alloy combination, the Mo content is preferably 0.3-1.22% by mass, more preferably 0.35-1.2% by mass, more preferably 0.38-1.18% by mass, more preferably 0.4-1.15% by mass, more preferably 0.45-1.1% by mass, more preferably 0.5-1% by mass, more preferably 0.6-0.9% by mass, and more preferably 0.7-0.8% by mass.

7. The wear-resistant alloy composition according to claim 1, characterized in that, Based on the total weight of the wear-resistant alloy combination, the V content is preferably 7.2-12.6% by mass, more preferably 7.5-12.5% ​​by mass, more preferably 7.8-12.3% by mass, more preferably 8-12% by mass, more preferably 8.2-12.8% by mass, more preferably 8.5-12.5% ​​by mass, more preferably 8.7-12.2% by mass, more preferably 9-12% by mass, such as 9.5% by mass, 10% by mass, 10.5% by mass, 11% by mass, and 11.5% by mass.

8. The wear-resistant alloy composition according to claim 1, characterized in that, The wear-resistant alloy composition is in the form of powder or wire. More preferably, the average particle size of the powder is 20-500 mesh, more preferably 50-200 mesh; more preferably, the diameter of the wire is ≤5mm, more preferably ≤4mm, more preferably ≤3.5mm, for example, 1μm-3.5mm, more preferably 10μm-3mm, more preferably 20μm-2.5mm, more preferably 50μm-2mm, more preferably 100μm-1.7mm.

9. The application of the wear-resistant alloy composition according to claim 1, characterized in that, include: The wear-resistant alloy composition is formed on the surface of a substrate using 3D printing technology.

10. The application according to claim 9, characterized in that, The 3D printing process is selected from DED technology, for example, it can be selected from SLM or LENS; Preferably, the 3D printing laser power of the LMD or LENS is at least 1000W, more preferably at least 1500W, more preferably at least 2000W, or at least 3000W, for example at least 4000W; Preferably, the 3D printing cladding thickness of the LMD or LENS is 0.01-3 mm / layer, more preferably 0.05-2.8 mm / layer, more preferably 0.1-2.5 mm / layer, more preferably 0.5-2.2 mm / layer, more preferably 0.8-2 mm / layer, more preferably 1-1.8 mm / layer, and more preferably 1.2-1.5 mm / layer; Preferably, the cladding width of the 3D printed LMD or LENS is 0.05-5mm, more preferably 0.1-4mm, more preferably 0.5-3mm, more preferably 1-2.5mm, and more preferably 1.5-2mm; Preferably, the overlap range of the 3D printed LMD or LENS is controlled to be ≤2.5mm, more preferably ≤2mm, more preferably ≤1.8mm, more preferably ≤1.5mm, and more preferably ≤1.2mm.

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