Wear-resistant composite material and preparation method thereof, and preparation method of carbon steel hardware

Abstract

The present application relates to the technical field of electric power hardware, and proposes a wear-resistant composite material and a preparation method thereof, and a preparation method of carbon steel hardware. The wear-resistant composite material includes an iron-nickel-chromium-silicon-boron alloy, and a mixture formed by micron-sized tungsten carbide powder particles and nano-sized tungsten carbide particles; the mixture accounts for 5.3-33.3% of the total volume of the wear-resistant composite material, in which micron-sized tungsten carbide particles account for 80-95% of the total mass, and the remainder is nano-sized tungsten carbide particles. A primary wear-resistant layer is welded on the surface of the hardware body using a welding rod of the wear-resistant composite material, a wear-resistant alloy layer is formed by precision hot pressing using a mold, and the wear-resistant alloy layer is polished to obtain a carbon steel hardware. The carbon steel hardware proposed in the present application has high wear resistance, smooth surface, and high precision, which improves the problems of wear failure and insufficient life of existing hardware, and reduces the maintenance cost of the hardware.

Description

Technical Field

[0001] The present application relates to the technical field of electric power fittings, and in particular to a wear-resistant composite material and a preparation method thereof, and a preparation method of carbon steel fittings. Background Art

[0002] Hardware is a metal accessory that connects and combines various devices in the power system and is widely used in industrial power transmission lines. In the operation of the power system, hardware usually needs to withstand large tensile forces; and in the natural environment, hardware usually needs to withstand the shaking and friction caused by strong winds and other climates. Therefore, hardware will produce a certain amount of wear, making wear and failure the main reason for hardware replacement.

[0003] In the prior art, hardware is generally made of carbon steel materials with good economy, high hardness and high strength, but the wear resistance of carbon steel hardware is insufficient. In areas with windy and sandy climates, the service life of carbon steel hardware is short, the line maintenance frequency is high, and the maintenance cost of the power system is high. Therefore, improving the wear resistance of carbon steel hardware can extend the service life of hardware, reduce operation and maintenance costs, and help energy conservation and emission reduction.

[0004] It can be seen that there is an urgent need for a wear-resistant composite material and a preparation method for improving the wear resistance of carbon steel hardware. Summary of the invention

[0005] In order to solve the above problems, the present application provides a wear-resistant composite material and a preparation method thereof, and a preparation method of carbon steel hardware, which better solve the disadvantage of insufficient wear resistance of existing carbon steel hardware.

[0006] This application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a wear-resistant composite material, comprising: an iron-nickel-chromium-silicon-boron alloy, and a mixture formed by micron-sized tungsten carbide particles and nano-sized tungsten carbide particles;

[0008] The mixture accounts for 5.3-33.3% of the total volume of the wear-resistant composite material;

[0009] In the mixture, micron-sized tungsten carbide particles account for 80-95% of the total mass of the mixture, and the remainder is nano-sized tungsten carbide particles.

[0010] Optionally, the iron-nickel-chromium-silicon-boron alloy comprises the following components by mass percentage:

[0011] C0.6~1%;

[0012] Si1.5~2%;

[0013] B3~4%;

[0014] Cr13~16%;

[0015] Ni11~15%;

[0016] Fe balance.

[0017] Optionally, the particle size of the micron-sized tungsten carbide particles is 100-300 μm, and the particle size of the nano-sized tungsten carbide particles is 50-100 nm.

[0018] In a second aspect, the present application provides a method for preparing a wear-resistant composite material, comprising:

[0019] The hollow welding rod tube is made of iron-nickel-chromium-silicon-boron alloy; the volume of the hollow part accounts for 5.3-33.3% of the total volume of the welding rod tube;

[0020] A mixture of micron-sized tungsten carbide particles and nano-sized tungsten carbide particles is filled in the hollow part; wherein, in the mixture, the micron-sized tungsten carbide particles account for 80-95% of the total mass of the mixture, and the remainder is nano-sized tungsten carbide particles.

[0021] Optionally, the iron-nickel-chromium-silicon-boron alloy comprises the following components by mass percentage:

[0022] C0.6~1%;

[0023] Si1.5~2%;

[0024] B3~4%;

[0025] Cr13~16%;

[0026] Ni11~15%;

[0027] Fe balance.

[0028] Optionally, the particle size of the micron-sized tungsten carbide particles is 100-300 μm, and the particle size of the nano-sized tungsten carbide particles is 50-100 nm.

[0029] In a third aspect, the present application also provides a method for preparing a carbon steel hardware, comprising:

[0030] A hardware body is provided; wherein the easily-worn area of ​​the hardware body has a serrated working surface;

[0031] A welding rod of a wear-resistant composite material is provided; wherein the wear-resistant composite material is prepared according to the above-mentioned preparation method of the wear-resistant composite material;

[0032] Welding: Use welding rod to weld on the serrated working surface to form a primary wear-resistant layer;

[0033] Precision molding: Using a mold corresponding to the serrated working surface, the primary wear-resistant layer is precisely hot-pressed to form a wear-resistant alloy layer;

[0034] Grinding: Grinding the wear-resistant alloy layer to obtain carbon steel hardware.

[0035] Optionally, a hardware body is provided, including:

[0036] A new hardware body, wherein a serrated working surface is reserved in the easily worn area of ​​the hardware body;

[0037] or,

[0038] The easily-worn area of ​​the original hardware is machined to form a serrated working surface to obtain the hardware body;

[0039] Among them, the thickness of the serrated working surface is 0.5~3mm.

[0040] Optional, welding, including:

[0041] Use flame welding or plasma spray welding to form a primary wear-resistant layer;

[0042] Among them, the thickness of the primary wear-resistant layer is 0.5~4mm.

[0043] Optional, precision molding, including:

[0044] Preheating the hardware body after forming the primary wear-resistant layer; wherein the preheating temperature is 250~300℃;

[0045] The primary wear-resistant layer is precisely hot-pressed by using a mold; wherein the hot-pressing temperature is 950-1200° C., the hot-pressing pressure is 30-40 MPa, and a material overflow groove is provided at a contact portion between the mold and the primary wear-resistant layer.

[0046] At least one of the above technical solutions adopted in this application can achieve the following beneficial effects:

[0047] The present application uses a welding rod of a wear-resistant composite material to weld a primary wear-resistant layer on the surface of the hardware body, and micron-sized tungsten carbide particles and nano-sized tungsten carbide particles are filled in the hollow part of the welding rod tube of the iron-nickel-chromium-silicon-boron alloy. During welding, the wear resistance of the surface of the carbon steel hardware is improved through the matrix toughening of the iron-nickel-chromium-silicon-boron alloy and the strengthening effect of the tungsten carbide particles. The present application uses a mold for precision hot pressing, which can process the wear-resistant composite material into a precise structure that matches the size of the hardware body, thereby improving the accuracy and surface finish of the carbon steel hardware. The wear-resistant composite material of the present application undergoes plastic deformation during the precision hot pressing process, and the surface structure is refined and the dislocation is increased, thereby further improving the wear resistance of the surface of the carbon steel hardware. The present application uses a serrated shape to connect the wear-resistant composite material to the hardware body, which increases the bonding area between the two and improves the bonding strength between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0049] Figure 1 A schematic flow chart showing a method for preparing a wear-resistant composite material according to an embodiment of the present application;

[0050] Figure 2 A schematic flow chart showing a method for preparing a carbon steel fitting according to an embodiment of the present application;

[0051] Figure 3 A schematic diagram showing a hardware body provided in a method for preparing a carbon steel hardware according to an embodiment of the present application;

[0052] Figure 4 A schematic diagram showing the formation of a primary wear-resistant layer in a method for preparing a carbon steel hardware according to an embodiment of the present application;

[0053] Figure 5 A schematic diagram showing a mold in a method for preparing a carbon steel hardware according to an embodiment of the present application;

[0054] Figure 6 A first angle schematic diagram showing the formation of a wear-resistant alloy layer in a method for preparing a carbon steel hardware according to an embodiment of the present application;

[0055] Figure 7 A second angle schematic diagram showing the formation of a wear-resistant alloy layer in a method for preparing a carbon steel hardware according to an embodiment of the present application;

[0056] Figure 8 A schematic diagram showing a carbon steel hardware obtained in a method for preparing a carbon steel hardware according to an embodiment of the present application is provided. DETAILED DESCRIPTION

[0057] The exemplary embodiments of the present application will be described in more detail below. However, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to enable the scope of the present application to be fully communicated to those skilled in the art.

[0058] The disclosure of the present invention provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described in the present invention. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0059] Generally, the terms may be understood at least in part based on the usage of the above invention. For example, the term "one or more" used in the present invention depends at least in part on the above invention, and may be used to describe any component, structure or feature in a singular form, or may be used to describe a combination of components, structures or features in a plural form. Similarly, terms such as "one", "an" or "the" may also be understood at least in part based on the above invention as conveying singular usage or conveying plural usage. In addition, the term "based on..." may be understood as not necessarily intended to convey a set of exclusive factors, but may alternatively, at least in part depending on the context, allow for the presence of additional factors that do not necessarily have to be explicitly described.

[0060] It should be noted that, in the description of the present application, the meanings of the terms "on", "over", "above", "over", etc. should be interpreted in the broadest way, meaning that the description containing these terms is interpreted as "the component can be set on another component in direct contact, or there can be intermediate components or layers between the components."

[0061] For ease of description, the present application may also use spatially relative terms such as "under", "beneath", "below", "under", "upper", "lower", etc. to describe the relationship of one component to another component shown in the drawings. In addition to the orientations described in the drawings, the spatially relative terms are also intended to cover different orientations of the device in use or operation. The device can be oriented in other ways, and the spatially relative descriptions used in the present application can be interpreted accordingly.

[0062] The embodiment of the present application provides a wear-resistant composite material. The wear-resistant composite material includes: an iron-nickel-chromium-silicon-boron alloy, and a mixture of micron-sized tungsten carbide particles and nano-sized tungsten carbide particles; the mixture accounts for 5.3-33.3% of the total volume of the wear-resistant composite material; in the mixture, the micron-sized tungsten carbide particles account for 80-95% of the total mass of the mixture, and the remainder is nano-sized tungsten carbide particles.

[0063] In some embodiments, the iron-nickel-chromium-silicon-boron alloy includes the following components by mass percentage:

[0064] C0.6~1%;

[0065] Si1.5~2%;

[0066] B3~4%;

[0067] Cr13~16%;

[0068] Ni11~15%;

[0069] Fe balance.

[0070] In some embodiments, the particle size of the micron-sized tungsten carbide particles is 100-300 μm, and the particle size of the nano-sized tungsten carbide particles is 50-100 nm.

[0071] The embodiment of the present application also provides a method for preparing a wear-resistant composite material, which is used to prepare the wear-resistant composite material in the above embodiment. Figure 1 The schematic diagram of the process of preparing the wear-resistant composite material proposed in one embodiment of the present application is shown. Figure 1 , the preparation method comprises the following steps:

[0072] Step S101, preparing a hollow welding rod tube using an iron-nickel-chromium-silicon-boron alloy; wherein the volume of the hollow portion accounts for 5.3-33.3% of the total volume of the welding rod tube;

[0073] Step S102, filling the hollow portion with a mixture of micron-sized tungsten carbide particles and nano-sized tungsten carbide particles; wherein, in the mixture, the micron-sized tungsten carbide particles account for 80-95% of the total mass of the mixture, and the remainder is nano-sized tungsten carbide particles.

[0074] In some embodiments, the iron-nickel-chromium-silicon-boron alloy includes the following components by mass percentage:

[0075] C0.6~1%;

[0076] Si1.5~2%;

[0077] B3~4%;

[0078] Cr13~16%;

[0079] Ni11~15%;

[0080] Fe balance.

[0081] In some embodiments, the particle size of the micron-sized tungsten carbide particles is 100-300 μm, and the particle size of the nano-sized tungsten carbide particles is 50-100 nm.

[0082] The embodiment of the present application also provides a method for preparing carbon steel hardware, which is used to prepare carbon steel hardware using the wear-resistant composite material prepared in the above embodiment. Figure 2 The schematic diagram of the process of preparing a carbon steel fitting according to an embodiment of the present application is shown. Figure 2 , the preparation method comprises the following steps:

[0083] S201, providing a hardware body; wherein the easily-worn area of ​​the hardware body has a serrated working surface;

[0084] S202, providing a welding rod of a wear-resistant composite material; wherein the wear-resistant composite material is prepared according to the preparation method of the wear-resistant composite material in the above embodiment;

[0085] S203, welding: welding on the serrated working surface using a welding rod to form a primary wear-resistant layer;

[0086] S204, precision molding: using a mold corresponding to the serrated working surface, the primary wear-resistant layer is precisely hot-pressed to form a wear-resistant alloy layer;

[0087] S205, grinding: grinding the wear-resistant alloy layer to obtain carbon steel hardware.

[0088] In some embodiments, step S201, providing a hardware body includes: manufacturing a new hardware body, wherein a serrated working surface is reserved in a wear-prone area of ​​the hardware body; or, forming a serrated working surface in a wear-prone area of ​​the original hardware by machining to obtain the hardware body.

[0089] The hardware body can be provided in two ways. One is to make a new hardware body, and a working surface of a certain shape and / or size is reserved in the easily worn area of ​​the new hardware body, and the working surface is serrated. The other is to further process the original hardware body, and to form a working surface of a certain shape and / or size in the easily worn area by machining and reducing the material in the easily worn area of ​​the original hardware body, and the working surface is serrated.

[0090] The certain shape and / or size may be pre-designed, and the wear-prone areas may be determined by analyzing the wear big data of carbon steel hardware, thereby pre-designing and determining the certain shape and / or size.

[0091] The serrated working surface formed in the easily worn area is used to provide welding space for the welding rod of the wear-resistant composite material. The serrated connection between the wear-resistant composite material and the hardware body increases the bonding area and bonding strength between the two.

[0092] Preferably, the thickness of the serrated working surface is 0.5-3 mm. It should be noted that the thickness here refers to the height difference between the highest point and the lowest point of the serrated working surface.

[0093] In some embodiments, step S202, providing a welding rod of a wear-resistant composite material includes: preparing a hollow welding rod tube using an iron-nickel-chromium-silicon-boron alloy; wherein the volume of the hollow portion accounts for 5.3-33.3% of the total volume of the welding rod tube; filling the hollow portion with a mixture of micron-sized tungsten carbide particles and nano-sized tungsten carbide particles; wherein, in the mixture, the micron-sized tungsten carbide particles account for 80-95% of the total mass of the mixture, and the remainder is nano-sized tungsten carbide particles.

[0094] Preferably, the iron-nickel-chromium-silicon-boron alloy comprises the following components by mass percentage:

[0095] C0.6~1%;

[0096] Si1.5~2%;

[0097] B3~4%;

[0098] Cr13~16%;

[0099] Ni11~15%;

[0100] Fe balance.

[0101] Preferably, the particle size of the micron-sized tungsten carbide particles is 100-300 μm, and the particle size of the nano-sized tungsten carbide particles is 50-100 nm.

[0102] In some embodiments, step S203, welding includes: welding using a flame welding process or a plasma spray welding process to form a primary wear-resistant layer; wherein the thickness of the primary wear-resistant layer is 0.5-4 mm.

[0103] The primary wear-resistant layer is welded on the serrated working surface using the welding rod of the wear-resistant composite material. The welding process can be oxygen-acetylene welding or plasma spray welding. After welding, the tungsten carbide particles in the wear-resistant composite material are dispersed in the iron-nickel-chromium-silicon-boron alloy matrix. The micron-sized tungsten carbide particles can improve the strength and hardness of the primary wear-resistant layer, and the nano-sized tungsten carbide particles can refine the grains of the matrix to strengthen the matrix.

[0104] Preferably, the thickness of the primary wear-resistant layer is 0.5-4 mm. It should be noted that the thickness here indicates the height difference between the highest point and the lowest point of the primary wear-resistant layer.

[0105] In some embodiments, step S204, precision molding includes: preheating the hardware body after forming the primary wear-resistant layer; wherein the preheating temperature is 250~300℃; using a mold to perform precision hot pressing on the primary wear-resistant layer; wherein the hot pressing temperature is 950~1200℃, the hot pressing pressure is 30~40Mpa, and the part where the mold contacts the primary wear-resistant layer has a material overflow groove.

[0106] The surface of the welded primary wear-resistant layer is uneven and needs to be deformed by precision forming.

[0107] The die can be made of carbon steel forging die steel material, and the shape and / or size of the die can be designed according to the shape and / or size of the serrated working surface. A material overflow groove is provided at the contact portion between the die and the primary wear-resistant layer to guide excess wear-resistant composite material during precision molding.

[0108] During precision molding, the hardware body after the primary wear-resistant layer is formed is preheated, and the preheated primary wear-resistant layer is hot pressed by a mold to form a wear-resistant alloy layer. The surface of the wear-resistant alloy layer is smooth and has high precision. The obtained wear-resistant alloy layer has undergone plastic deformation, the surface structure has been refined, and the dislocation has been increased, thereby improving the wear resistance.

[0109] Preferably, the preheating temperature is 250-300° C., the hot pressing temperature is 950-1200° C., and the hot pressing pressure is 30-40 MPa.

[0110] In some embodiments, step S205, grinding includes: grinding by hand or by using a grinder.

[0111] After removing the mold, the excess wear-resistant composite material connected to the hardware body is polished and smoothed to obtain a high-precision, smooth-surfaced, wear-resistant carbon steel hardware.

[0112] Figures 3 to 8 The process steps of the preparation method of carbon steel hardware are shown in FIG. Figures 3 to 8 In the figure, 1 represents the original hardware, 2 represents the material reduction, 3 represents the serrated working surface, 4 represents the primary wear-resistant layer, 5 represents the mold, 6 represents the material overflow groove, 7 represents the excess wear-resistant composite material, and 8 represents the carbon steel hardware.

[0113] Reference Figures 3 to 8 A method for preparing carbon steel hardware is described.

[0114] Figure 3 A schematic diagram of providing a hardware body is shown.

[0115] The wear-prone area of ​​the original hardware 1 is machined to remove material 2 to obtain a serrated working surface 3.

[0116] Figure 4 A schematic diagram of forming a primary wear-resistant layer is shown.

[0117] The primary wear-resistant layer 4 is obtained by welding on the serrated working surface 3 using a welding rod of the wear-resistant composite material.

[0118] Figure 5 A schematic diagram of the mold is shown.

[0119] The shape and / or size of the mold 5 matches the serrated working surface 3 , and a material overflow groove 6 is provided at the contact portion between the mold 5 and the primary wear-resistant layer 4 .

[0120] Figure 6 A first angle schematic diagram showing the formation of a wear-resistant alloy layer is shown. Figure 7 A second angle schematic diagram of forming a wear-resistant alloy layer is shown.

[0121] The primary wear-resistant layer 4 is precisely hot-pressed by using the mold 5 , so that the excess wear-resistant composite material 7 is guided through the material overflow groove 6 .

[0122] Figure 8 A schematic diagram of obtaining carbon steel hardware is shown.

[0123] The excess wear-resistant composite material 7 is polished to obtain a carbon steel fitting 8 .

[0124] Specific examples are given below.

[0125] Embodiment 1

[0126] Provide hardware body:

[0127] The hardware body is a newly manufactured carbon steel right-angle hanging plate, and a serrated working surface of a preset shape and / or size is reserved in the easily worn area of ​​the carbon steel right-angle hanging plate, and the thickness of the serrated working surface is 0.5 mm.

[0128] Welding rods with wear-resistant composite materials are available:

[0129] The welding rod of the wear-resistant composite material is made of iron-nickel-chromium-silicon-boron alloy to prepare a hollow welding rod tube, and a mixture of micron-sized tungsten carbide particles and nano-sized tungsten carbide particles is filled in the hollow part, and the mixture accounts for 25% of the total volume of the welding rod tube. In the mixture, micron-sized tungsten carbide particles account for 80% of the total mass of the mixture, and the rest is nano-sized tungsten carbide particles.

[0130] welding:

[0131] Oxy-acetylene welding is performed on the serrated working surface using welding rods to form a primary wear-resistant layer with a thickness of 0.5~1mm.

[0132] Precision molding:

[0133] The carbon steel right-angle hanging plate after forming the primary wear-resistant layer is preheated at a temperature of 250°C. The primary wear-resistant layer is precisely hot-pressed using a mold at a temperature of 950°C and a pressure of 40Mpa. The contact area between the mold and the primary wear-resistant layer has a material overflow groove to form a wear-resistant alloy layer.

[0134] Sanding:

[0135] The wear-resistant alloy layer is manually polished to obtain carbon steel hardware.

[0136] Embodiment 2

[0137] Provide hardware body:

[0138] The hardware body is the original carbon steel right-angle hanging plate. The easily worn area of ​​the carbon steel right-angle hanging plate is machined and reduced to form a serrated working surface of a preset shape and / or size. The thickness of the serrated working surface is 3 mm.

[0139] Welding rods with wear-resistant composite materials are available:

[0140] The welding rod of wear-resistant composite material is made of iron-nickel-chromium-silicon-boron alloy to prepare the hollow welding rod tube, and the hollow part is filled with a mixture of micron-sized tungsten carbide particles and nano-sized tungsten carbide particles, and the mixture accounts for 5% of the total volume of the welding rod tube. In the mixture, micron-sized tungsten carbide particles account for 95% of the total mass of the mixture, and the rest is nano-sized tungsten carbide particles.

[0141] welding:

[0142] Plasma spray welding is performed on the serrated working surface using welding rods to form a primary wear-resistant layer with a thickness of 2.5~4mm.

[0143] Precision molding:

[0144] The carbon steel right-angle hanging plate after forming the primary wear-resistant layer is preheated at 300°C. The primary wear-resistant layer is precisely hot-pressed by a mold at a temperature of 1200°C and a pressure of 30Mpa. The contact part between the mold and the primary wear-resistant layer has a material overflow groove to form a wear-resistant alloy layer.

[0145] Sanding:

[0146] The grinder grinds the wear-resistant alloy layer to obtain carbon steel hardware.

[0147] The above is only a specific implementation of the present application. Under the above teachings of the present application, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of the present application, and the protection scope of the present application shall be based on the protection scope of the claims.

[0148] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination.

Claims

1. A method for preparing a carbon steel hardware, characterized in that: include: A hardware body is provided; wherein the easily-worn area of ​​the hardware body has a serrated working surface; A welding rod of a wear-resistant composite material is provided; wherein the wear-resistant composite material is prepared according to a preparation method of the wear-resistant composite material; Welding; welding on the serrated working surface using the welding rod to form a primary wear-resistant layer; Precision molding; using a mold corresponding to the serrated working surface, the primary wear-resistant layer is precisely hot-pressed to form a wear-resistant alloy layer; Grinding; Grinding the wear-resistant alloy layer to obtain the carbon steel hardware; Wherein, the preparation method of the wear-resistant composite material comprises: A hollow welding rod tube is prepared by using an iron-nickel-chromium-silicon-boron alloy; wherein the volume of the hollow part accounts for 5.3-33.3% of the total volume of the welding rod tube; The hollow portion is filled with a mixture of micron-sized tungsten carbide particles and nano-sized tungsten carbide particles; wherein, in the mixture, the micron-sized tungsten carbide particles account for 80-95% of the total mass of the mixture, and the remainder is the nano-sized tungsten carbide particles.

2. The method for preparing carbon steel hardware according to claim 1, characterized in that: The provision of a hardware body comprises: The hardware body is newly manufactured, wherein the serrated working surface is reserved in the easily-worn area of ​​the hardware body; or, The easily-worn area of ​​the original hardware is machined to form the serrated working surface, thereby obtaining the hardware body; Wherein, the thickness of the serrated working surface is 0.5~3mm.

3. The method for preparing carbon steel hardware according to claim 1, characterized in that: The welding comprises: Using flame welding or plasma spray welding to form the primary wear-resistant layer; Wherein, the thickness of the primary wear-resistant layer is 0.5~4mm.

4. The method for preparing carbon steel hardware according to claim 1, characterized in that: The precision molding comprises: Preheating the hardware body after forming the primary wear-resistant layer; wherein the preheating temperature is 250-300°C; The primary wear-resistant layer is precisely hot-pressed by using the mold; wherein the hot-pressing temperature is 950-1200° C., the hot-pressing pressure is 30-40 MPa, and a material overflow groove is provided at a contact portion between the mold and the primary wear-resistant layer.

5. The method for preparing carbon steel hardware according to claim 1, characterized in that: The iron-nickel-chromium-silicon-boron alloy comprises the following components by mass percentage: C0.6~1%； Si1.5~2%; B3~4%； Cr13~16%； Ni11~15%; Fe balance.

6. The method for preparing carbon steel hardware according to claim 1, characterized in that: The particle size of the micron-sized tungsten carbide particles is 100-300 μm, and the particle size of the nano-sized tungsten carbide particles is 50-100 nm.

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