High-wear-resistance drill bit and preparation process thereof

Abstract

The application relates to the technical field of drill bits, in particular to a high-wear-resistance drill bit and a preparation process thereof. The application obtains a pretreated drill bit by sequentially performing cleaning, polishing and sand blasting treatment on a drill bit base body; the high-wear-resistance drill bit is obtained by forming a wear-resistant layer through a magnetic field assisted laser cladding process and cladding wear-resistant material on the surface of the pretreated drill bit; the wear-resistant material comprises the following components in percentage by mass: Ni: 8-12%, nickel-plated silicon carbide: 0.3-1.0%, WC: 0.5-2.0%, Cr: 22-25%, Mo: 1-3%, Mn: 0.3-0.8%, Si: 0.5-1.0%, C: 0.3-0.5%, B: 1-2%, and the balance is Fe.

Description

Technical Field

[0001] This invention relates to the field of drill bit technology, specifically to a high wear-resistant drill bit and its manufacturing process. Background Technology

[0002] With the continuous development of industrial production, especially in the fields of oil, natural gas, and mining, higher requirements are being placed on the wear resistance and service life of drill bits. As a key tool in drilling operations, the performance of high-wear-resistant drill bits directly affects operational efficiency and economic benefits. In recent years, with the advancement of materials science and engineering technology, the materials and manufacturing processes of high-wear-resistant drill bits have been extensively studied.

[0003] High-wear-resistant drill bits are typically made of high-performance materials such as cemented carbide, ceramics, and composite materials, which possess excellent wear resistance, thermal shock resistance, and strength. Common manufacturing processes include powder metallurgy, laser cladding, and thermal spraying. The application of these technologies has significantly improved the wear resistance and service life of drill bits.

[0004] Traditional heat treatment processes (such as integral quenching and tempering) are prone to uneven heating and varying cooling rates in drill bits with complex geometries. This results in inconsistent hardness across different parts of the drill bit, insufficient wear resistance in localized areas, and even cracks or deformation, affecting the drill bit's service life. In composite material drill bits, the interfacial bonding strength between diamond and the metal matrix is ​​crucial. In existing technologies, some drill bits suffer from weak interfacial bonding, leading to diamond particle shedding under high-speed rotation or high impact loads, reducing wear resistance and reliability. While surface strengthening processes such as carburizing and nitriding can improve surface hardness, they suffer from limited penetration depth and uneven strengthening effects. Furthermore, under high-wear conditions, the surface strengthening layer is prone to wear and peeling, failing to provide sustained wear protection.

[0005] Therefore, we propose a high wear-resistant drill bit and its manufacturing process. Summary of the Invention

[0006] The purpose of this invention is to provide a high wear-resistant drill bit and its manufacturing process to solve the problems raised in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A manufacturing process for a high wear-resistant drill bit includes the following steps:

[0009] The drill bit substrate is taken and subjected to cleaning, grinding, and sandblasting treatments in sequence to obtain a pre-treated drill bit. A wear-resistant material is then clad onto the surface of the pre-treated drill bit using a magnetic field-assisted laser cladding process to form a wear-resistant layer, resulting in a high-wear-resistant drill bit. The wear-resistant material comprises the following components by mass percentage: Ni: 8-12%, nickel-plated silicon carbide 0.3-1.0%, WC: 0.5-2.0%, Cr: 22-25%, Mo: 1-3%, Mn: 0.3-0.8%, Si: 0.5-1.0%, C: 0.3-0.5%, B: 1-2%, with the balance being Fe.

[0010] Furthermore, the preparation method of the nickel-plated silicon carbide is as follows:

[0011] Silicon carbide is placed in hydrofluoric acid for roughening for 10-20 minutes, then ultrasonically sensitized in a sensitizing solution for 20-30 minutes, activated in an activation solution for 20-30 minutes, and finally electrolessly nickel-plated in a plating solution. After vacuum filtration, washing, and drying, nickel-plated silicon carbide is obtained.

[0012] Furthermore, the concentration of the hydrofluoric acid solution is 10 wt%.

[0013] Furthermore, the sensitizing solution comprises: 10-20 g / L stannous chloride and 20-50 mL / L hydrochloric acid.

[0014] Furthermore, the components of the activation solution are: palladium chloride 0.2-0.5 g / L and hydrochloric acid 5-10 mL / L.

[0015] Furthermore, the plating solution comprises: nickel sulfate hexahydrate 25-35 g / L, anhydrous sodium acetate 20-30 g / L, sodium hypophosphite 20-30 g / L, sodium citrate 10-20 g / L, magnetic molybdenum disulfide 2-6 g / L, and a pH of 4-5.

[0016] Furthermore, the preparation method of the magnetic molybdenum disulfide is as follows:

[0017] Sodium molybdate, L-cysteine, and deionized water were mixed evenly, and magnetic iron oxide and graphene oxide solutions were added. The mixture was ultrasonically dispersed for 20-40 minutes, and the pH of the system was adjusted to 6.0-6.5. Then, the mixture was placed in a stainless steel reactor with a polytetrafluoroethylene liner and hydrothermally treated at 180-200℃ for 24-36 hours. After naturally cooling to room temperature, the solid product was collected by centrifugation, washed, and dried to obtain magnetic molybdenum disulfide.

[0018] Further, the mass ratio of sodium molybdate, L-cysteine ​​and deionized water is 1:(1.0-1.5):(50-70).

[0019] Furthermore, the mass ratio of sodium molybdate, magnetic iron oxide, and graphene oxide solution is 1:(0.3-0.5):(80-100), the concentration of graphene oxide solution is 2-5 mg / mL, and the solvent is deionized water.

[0020] Furthermore, the magnetic field-assisted laser cladding process conditions are as follows: laser power 1000-1500W, scanning speed 200-500mm / min, spot diameter 2-4mm, argon flow rate 10-15L / min, magnetic field strength 10-20T, and powder feeding speed 25-35g / min.

[0021] Furthermore, the thickness of the wear-resistant layer is 0.2-2 mm.

[0022] Furthermore, the drill bit body includes a drill shank and a drill body with multiple stepped sections, with a transitional cutting edge for reaming provided between adjacent stepped sections, and an outwardly convex arc section provided at the connection between the transitional cutting edge and the larger diameter stepped section.

[0023] Furthermore, the transition cutting edge includes a first cutting edge segment near the smaller diameter stepped segment and a convex arc segment near the larger diameter stepped segment. The first cutting edge segment is a straight line segment or a concave arc segment. The first cutting edge segment and the convex arc segment are smoothly and tangentially connected.

[0024] In the aforementioned technical solutions, the transition cutting edge of a traditional step drill uses a straight line or an inwardly concave arc connection, resulting in an abrupt fold line at the junction of the large end of the cutting edge and the outer cylindrical surface. This easily leads to stress concentration, low strength, and drill bit damage at this location. This invention optimizes the connection area with an outwardly convex arc cutting edge, achieving a smooth transition and eliminating fold lines and sharp corners. This allows for even distribution of stress and cutting force, significantly improving the cutting edge's impact resistance and wear resistance.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] This invention discloses a high-wear-resistant drill bit and its manufacturing process. A wear-resistant material is obtained by compounding Ni, nickel-plated silicon carbide, WC, Cr, Mo, Mn, Si, C, B, and Fe. The nickel-plated silicon carbide is chemically plated to form a magnetic molybdenum disulfide-nickel composite coating with varying contents. This significantly improves the wettability and interfacial bonding strength between silicon carbide particles and the metal substrate, effectively preventing particle agglomeration and detachment. Furthermore, the layered structure and magnetic modulation effect of molybdenum disulfide enhance the friction-reducing and wear-resistant stability of the coating. Simultaneously, silicon carbide, molybdenum disulfide, and tungsten carbide work synergistically to further enhance the material's wear resistance. This results in the drill bit exhibiting stronger wear resistance in high-intensity wear environments. Finally, this invention uses magnetic field-assisted laser cladding of the wear-resistant material on the pre-treated drill bit surface to form a wear-resistant layer. The magnetic field refines the cladding layer grains, reduces defects such as pores and cracks, and improves the coating density and interfacial metallurgical bonding strength. This ensures a strong bond between the wear-resistant layer and the drill bit substrate, preventing peeling and extending the drill bit's service life. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the high wear-resistant drill bit in this invention;

[0029] Figure 2 for Figure 1 Enlarged schematic diagram of part A (the first cutting edge is an arc);

[0030] Figure 3 for Figure 1 Enlarged schematic diagram of section A (the first cutting edge is a straight line);

[0031] Figure 4 and Figure 5 for Figure 1 Enlarged schematic diagram of section A (excluding the first cutting edge);

[0032] The numbers in the diagram are: 1-drill shank, 2-drill body, 21-step section, 22-cutting edge, 211-larger diameter step section, 212-smaller diameter step section, 221-outer convex arc section, 222-first cutting edge section. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that there are no special restrictions on the manufacturers of the raw materials involved in this invention. Exemplarily, these include (in this embodiment) the drill bit matrix: material is high-speed steel 4241; Ni: particle size is 200 mesh; Cr: particle size is 300 mesh; Mo: particle size is 250 mesh; Mn: particle size is 250 mesh; Si: model is S108981; C: model is C109965; B: model is B105884; Fe: model is Brofos-Tfe-W15; graphene oxide: model is XF002-2; silicon carbide: model is XFJ30.

[0035] Example 1: A manufacturing process for a high wear-resistant drill bit, comprising the following steps:

[0036] Take the drill bit base and put it into a 40kHz ultrasonic cleaner. Soak it in acetone for 15 minutes, then grind it. Use 150μm alumina sand and sandblast it for 30 seconds at 0.4MPa pressure to obtain a pre-treated drill bit.

[0037] Ni, nickel-plated silicon carbide, WC, Cr, Mo, Mn, Si, C, B, and Fe are mixed, ball-milled, and passed through a 200-mesh sieve to obtain a wear-resistant material. The wear-resistant material comprises the following components by mass percentage: Ni: 8%, nickel-plated silicon carbide: 0.3%, WC: 0.5%, Cr: 22%, Mo: 1%, Mn: 0.3%, Si: 0.5%, C: 0.3%, B: 1%, with the balance being Fe.

[0038] Using a magnetic field-assisted laser cladding process, with a laser power of 1000W, a scanning speed of 200mm / min, a spot diameter of 2mm, an argon flow rate of 10L / min, a magnetic field strength of 10T, and a powder feeding speed of 25g / min, wear-resistant materials are clad onto the surface of a pre-treated drill bit to form a wear-resistant layer, resulting in a high wear-resistant drill bit.

[0039] The preparation method of nickel-plated silicon carbide is as follows:

[0040] Silicon carbide was placed in 10wt% hydrofluoric acid and roughened for 10 min. After vacuum filtration, it was ultrasonically sensitized in a sensitizing solution for 20 min. The sensitizing solution consisted of 10 g / L stannous chloride and 20 mL / L hydrochloric acid. After vacuum filtration and washing, it was activated in an activation solution for 20 min. The activation solution consisted of 0.2 g / L palladium chloride and 5 mL / L hydrochloric acid. After vacuum filtration, washing, and drying, it was finally placed in a plating solution for electroless nickel plating. After vacuum filtration, washing, and drying, nickel-plated silicon carbide was obtained. The plating solution consisted of 25 g / L nickel sulfate hexahydrate, 20 g / L anhydrous sodium acetate, 20 g / L sodium hypophosphite, 10 g / L sodium citrate, and 2 g / L magnetic molybdenum disulfide, with a pH of 4.

[0041] The preparation method of magnetic molybdenum disulfide is as follows:

[0042] 2g sodium molybdate, 2g L-cysteine ​​and 100g deionized water were mixed evenly, 0.6g magnetic iron(III) oxide and 200g 2mg / mL graphene oxide solution were added, and the mixture was ultrasonically dispersed for 20min. The pH of the system was adjusted to 6.0, and then the mixture was placed in a stainless steel reactor with a polytetrafluoroethylene liner. The reactor was hydrothermally treated at 180℃ for 24h, and then naturally cooled to room temperature. The solid product was collected by centrifugation, washed and dried to obtain magnetic molybdenum disulfide.

[0043] Example 2: A manufacturing process for a high wear-resistant drill bit, comprising the following steps:

[0044] Take the drill bit base and put it into a 40kHz ultrasonic cleaner. Soak it in acetone for 20 minutes, then grind it. Use 200μm alumina sand and sandblast it for 50 seconds at 0.5MPa pressure to obtain a pre-treated drill bit.

[0045] Ni, nickel-plated silicon carbide, WC, Cr, Mo, Mn, Si, C, B, and Fe are mixed, ball-milled, and passed through a 200-mesh sieve to obtain a wear-resistant material. The wear-resistant material comprises the following components by mass percentage: Ni: 10%, nickel-plated silicon carbide: 0.5%, WC: 1%, Cr: 24%, Mo: 2%, Mn: 0.5%, Si: 0.8%, C: 0.4%, B: 1.5%, with the balance being Fe.

[0046] Using a magnetic field-assisted laser cladding process, with a laser power of 1200W, a scanning speed of 400mm / min, a spot diameter of 3mm, an argon flow rate of 12L / min, a magnetic field strength of 15T, and a powder feeding speed of 30g / min, wear-resistant materials are clad onto the surface of a pre-treated drill bit to form a wear-resistant layer, resulting in a high wear-resistant drill bit.

[0047] The preparation method of nickel-plated silicon carbide is as follows:

[0048] Silicon carbide was placed in 10wt% hydrofluoric acid and roughened for 15 min. After vacuum filtration, it was ultrasonically sensitized in a sensitizing solution for 25 min. The sensitizing solution consisted of 15 g / L stannous chloride and 30 mL / L hydrochloric acid. After vacuum filtration and washing, it was activated in an activation solution for 25 min. The activation solution consisted of 0.3 g / L palladium chloride and 8 mL / L hydrochloric acid. After vacuum filtration, washing, and drying, it was finally placed in a plating solution for electroless nickel plating. After vacuum filtration, washing, and drying, nickel-plated silicon carbide was obtained. The plating solution consisted of 30 g / L nickel sulfate hexahydrate, 25 g / L anhydrous sodium acetate, 25 g / L sodium hypophosphite, 15 g / L sodium citrate, 4 g / L magnetic molybdenum disulfide, and a pH of 4.5.

[0049] The preparation method of magnetic molybdenum disulfide is as follows:

[0050] 4g sodium molybdate, 5g L-cysteine ​​and 240g deionized water were mixed evenly, and 1.6g magnetic iron oxide and 280g 3mg / mL graphene oxide solution were added. The mixture was ultrasonically dispersed for 30min, and the pH of the system was adjusted to 6.2. Then it was placed in a stainless steel reactor with a polytetrafluoroethylene liner and hydrothermally treated at 190℃ for 30h. After naturally cooling to room temperature, the solid product was collected by centrifugation, washed and dried to obtain magnetic molybdenum disulfide.

[0051] Example 3: A manufacturing process for a high wear-resistant drill bit, comprising the following processes:

[0052] Take the drill bit base and put it into a 40kHz ultrasonic cleaner. Soak it in acetone for 30 minutes, then grind it. Use 250μm alumina sand and sandblast it for 60 seconds at 0.6MPa pressure to obtain a pre-treated drill bit.

[0053] Ni, nickel-plated silicon carbide, WC, Cr, Mo, Mn, Si, C, B, and Fe are mixed, ball-milled, and passed through a 200-mesh sieve to obtain a wear-resistant material. The wear-resistant material comprises the following components by mass percentage: Ni: 12%, nickel-plated silicon carbide 1.0%, WC: 2.0%, Cr: 25%, Mo: 3%, Mn: 0.8%, Si: 1.0%, C: 0.5%, B: 2%, with the balance being Fe.

[0054] Using a magnetic field-assisted laser cladding process, with a laser power of 1500W, a scanning speed of 500mm / min, a spot diameter of 4mm, an argon flow rate of 15L / min, a magnetic field strength of 20T, and a powder feeding speed of 35g / min, wear-resistant materials are clad onto the surface of a pre-treated drill bit to form a wear-resistant layer, resulting in a high wear-resistant drill bit.

[0055] The preparation method of nickel-plated silicon carbide is as follows:

[0056] Silicon carbide was placed in 10wt% hydrofluoric acid and roughened for 20 min. After vacuum filtration, it was ultrasonically sensitized in a sensitizing solution for 30 min. The sensitizing solution consisted of 20 g / L stannous chloride and 50 mL / L hydrochloric acid. After vacuum filtration and washing, it was activated in an activation solution for 30 min. The activation solution consisted of 0.5 g / L palladium chloride and 10 mL / L hydrochloric acid. After vacuum filtration, washing, and drying, it was finally placed in a plating solution for electroless nickel plating. After vacuum filtration, washing, and drying, nickel-plated silicon carbide was obtained. The plating solution consisted of 35 g / L nickel sulfate hexahydrate, 30 g / L anhydrous sodium acetate, 30 g / L sodium hypophosphite, 20 g / L sodium citrate, 6 g / L magnetic molybdenum disulfide, and pH 5.

[0057] The preparation method of magnetic molybdenum disulfide is as follows:

[0058] 6g of sodium molybdate, 9g of L-cysteine, and 420g of deionized water were mixed evenly. 3g of magnetic iron(III) oxide and 480g of 5mg / mL graphene oxide solution were added, and the mixture was ultrasonically dispersed for 40min. The pH of the system was adjusted to 6.5, and then the mixture was placed in a stainless steel reactor with a polytetrafluoroethylene liner. The reactor was hydrothermally treated at 200℃ for 36h, and then naturally cooled to room temperature. The solid product was collected by centrifugation, washed, and dried to obtain magnetic molybdenum disulfide.

[0059] Comparative Example 1: A manufacturing process for a high wear-resistant drill bit, comprising the following steps:

[0060] Take the drill bit base and put it into a 40kHz ultrasonic cleaner. Soak it in acetone for 20 minutes, then grind it. Use 200μm alumina sand and sandblast it for 50 seconds at 0.5MPa pressure to obtain a pre-treated drill bit.

[0061] Ni, WC, Cr, Mo, Mn, Si, C, B and Fe are mixed, ball-milled and passed through a 200-mesh sieve to obtain a wear-resistant material. The wear-resistant material comprises the following components by mass percentage: Ni: 10%, WC: 1%, Cr: 24%, Mo: 2%, Mn: 0.5%, Si: 0.8%, C: 0.4%, B: 1.5%, with the balance being Fe.

[0062] Using a magnetic field-assisted laser cladding process, with a laser power of 1200W, a scanning speed of 400mm / min, a spot diameter of 3mm, an argon flow rate of 12L / min, a magnetic field strength of 20T, and a powder feeding speed of 2.0g / s, wear-resistant materials are clad onto the surface of a pre-treated drill bit to form a wear-resistant layer, resulting in a high wear-resistant drill bit.

[0063] Based on Example 2, Comparative Example 1 did not introduce nickel-plated silicon carbide, and the remaining process steps and reaction parameters were the same as in Example 2.

[0064] Comparative Example 2: A manufacturing process for a high wear-resistant drill bit, comprising the following processes:

[0065] Take the drill bit base and put it into a 40kHz ultrasonic cleaner. Soak it in acetone for 20 minutes, then grind it. Use 200μm alumina sand and sandblast it for 50 seconds at 0.5MPa pressure to obtain a pre-treated drill bit.

[0066] Ni, nickel-plated silicon carbide, WC, Cr, Mo, Mn, Si, C, B, and Fe are mixed, ball-milled, and passed through a 200-mesh sieve to obtain a wear-resistant material. The wear-resistant material comprises the following components by mass percentage: Ni: 10%, nickel-plated silicon carbide: 0.5%, WC: 1%, Cr: 24%, Mo: 2%, Mn: 0.5%, Si: 0.8%, C: 0.4%, B: 1.5%, with the balance being Fe.

[0067] Using a magnetic field-assisted laser cladding process, with a laser power of 1200W, a scanning speed of 400mm / min, a spot diameter of 3mm, an argon flow rate of 12L / min, a magnetic field strength of 20T, and a powder feeding speed of 2.0g / s, wear-resistant materials are clad onto the surface of a pre-treated drill bit to form a wear-resistant layer, resulting in a high wear-resistant drill bit.

[0068] The preparation method of nickel-plated silicon carbide is as follows:

[0069] Silicon carbide was placed in 10wt% hydrofluoric acid and roughened for 15 min. After vacuum filtration, it was ultrasonically sensitized in a sensitizing solution for 25 min. The sensitizing solution consisted of 15 g / L stannous chloride and 30 mL / L hydrochloric acid. After vacuum filtration and washing, it was activated in an activation solution for 25 min. The activation solution consisted of 0.3 g / L palladium chloride and 8 mL / L hydrochloric acid. After vacuum filtration, washing, and drying, it was finally placed in a plating solution for electroless nickel plating. After vacuum filtration, washing, and drying, nickel-plated silicon carbide was obtained. The plating solution consisted of 30 g / L nickel sulfate hexahydrate, 25 g / L anhydrous sodium acetate, 25 g / L sodium hypophosphite, and 15 g / L sodium citrate, with a pH of 4.5.

[0070] Based on Example 2, magnetic molybdenum disulfide was not introduced in Comparative Example 2, but the remaining process steps and reaction parameters were the same as in Example 2.

[0071] Comparative Example 3: A manufacturing process for a high wear-resistant drill bit, comprising the following processes:

[0072] Based on Example 2, no magnetic field assistance was applied in Comparative Example 3, while the remaining process steps and reaction parameters were the same as in Example 2.

[0073] Comparative Example 4: A manufacturing process for a high wear-resistant drill bit, comprising the following processes:

[0074] Based on Example 2, Comparative Example 4 replaced the wear-resistant material with the same mass of commercially available iron-based self-fluxing alloy powder (grade Fe30, particle size 200 mesh), and the remaining process steps and reaction parameters were the same as in Example 2.

[0075] Experiment: High wear-resistant drill bits obtained in Examples 1-3 and Comparative Examples 1-4 were used to prepare samples. Their performance was tested and the test results were recorded.

[0076] Wear resistance test: Referencing GB / T12444-2006 standard, the wear test was conducted using a ring-block wear test. On an MM-200 friction and wear testing machine, a GCr15 steel grinding ring (HRC62-64) was paired with the ring. The test load was set to 200 N, the rotation speed to 400 rpm, and the time to 30 min. The wear amount was measured and the data recorded using an electronic balance.

[0077] Coating adhesion strength test: A WS-2005 scratch tester was used, with a maximum test load of 100 N, a loading rate of 50 N / min, a diamond indenter cone angle of 120 degrees, and a radius of 0.2 mm. The test used a sudden increase in acoustic emission signal and a simultaneous fluctuation in the coefficient of friction exceeding 15% as the failure criteria for coating cracking and peeling. The critical load values ​​corresponding to coating failure for each group of samples were collected and recorded.

[0078] The test results are shown in Table 1.

[0079] Table 1 Test results of relevant performance of high wear-resistant drill bits

[0080]

[0081] Based on the data in the table above, the following conclusions can be clearly drawn:

[0082] Combined with Examples 1-3 and Comparative Examples 1-4, it can be seen that the high wear-resistant drill bit prepared by the present invention has excellent wear resistance. At the same time, the present invention uses magnetic field-assisted laser cladding process to prepare a composite wear-resistant coating on the pretreated surface of the drill bit, which effectively improves the microstructure of the coating, strengthens the bonding effect between the wear-resistant layer and the drill bit substrate, and has higher bonding strength. The coating is not easy to crack or peel off, thereby effectively extending the service life of the drill bit.

[0083] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A manufacturing process for a high wear-resistant drill bit, characterized in that: Includes the following steps: The drill bit substrate is taken and subjected to cleaning, grinding, and sandblasting treatments in sequence to obtain a pretreated drill bit. A wear-resistant material is then clad onto the surface of the pretreated drill bit using a magnetic field-assisted laser cladding process to form a wear-resistant layer, resulting in a high-wear-resistant drill bit. The wear-resistant material comprises the following components by mass percentage: Ni: 8-12%, nickel-plated silicon carbide 0.3-1.0%, WC: 0.5-2.0%, Cr: 22-25%, Mo: 1-3%, Mn: 0.3-0.8%, Si: 0.5-1.0%, C: 0.3-0.5%, B: 1-2%, with the balance being Fe.

2. The manufacturing process of a high wear-resistant drill bit according to claim 1, characterized in that: The method for preparing the nickel-plated silicon carbide is as follows: Silicon carbide is placed in hydrofluoric acid for roughening for 10-20 minutes, then ultrasonically sensitized in a sensitizing solution for 20-30 minutes, activated in an activation solution for 20-30 minutes, and finally electrolessly nickel-plated in a plating solution. After vacuum filtration, washing, and drying, nickel-plated silicon carbide is obtained.

3. The manufacturing process of a high wear-resistant drill bit according to claim 1, characterized in that: The activation solution consists of: palladium chloride 0.2-0.5 g / L and hydrochloric acid 5-10 mL / L.

4. The manufacturing process of a high wear-resistant drill bit according to claim 1, characterized in that: The plating solution consists of: nickel sulfate hexahydrate 25-35 g / L, anhydrous sodium acetate 20-30 g / L, sodium hypophosphite 20-30 g / L, sodium citrate 10-20 g / L, magnetic molybdenum disulfide 2-6 g / L, and a pH of 4-5.

5. The manufacturing process of a high wear-resistant drill bit according to claim 1, characterized in that: The magnetic molybdenum disulfide is prepared as follows: Sodium molybdate, L-cysteine, and deionized water were mixed evenly, and magnetic iron oxide and graphene oxide solutions were added. The mixture was ultrasonically dispersed for 20-40 minutes, and the pH of the system was adjusted to 6.0-6.

5. Then, the mixture was placed in a stainless steel reactor with a polytetrafluoroethylene liner and hydrothermally treated at 180-200℃ for 24-36 hours. After naturally cooling to room temperature, the solid product was collected by centrifugation, washed, and dried to obtain magnetic molybdenum disulfide.

6. The manufacturing process of a high wear-resistant drill bit according to claim 1, characterized in that: The magnetic field-assisted laser cladding process conditions are as follows: laser power 1000-1500W, scanning speed 200-500mm / min, spot diameter 2-4mm, argon flow rate 10-15L / min, magnetic field strength 10-20T, and powder feeding speed 25-35g / min.

7. The manufacturing process of a high wear-resistant drill bit according to claim 1, characterized in that: The drill bit body includes a drill shank (1) and a drill body (2) having multiple stepped sections (21). A transitional cutting edge (22) for enlarging holes is provided between adjacent stepped sections (21), and an outwardly convex arc section (221) is provided at the connection between the transitional cutting edge (22) and the larger diameter stepped section (211).

8. The manufacturing process of a high wear-resistant drill bit according to claim 7, characterized in that: The transition cutting edge (22) includes a first cutting edge segment (222) near the smaller diameter stepped segment (212) and a convex arc segment (221) near the larger diameter stepped segment (211). The first cutting edge segment (222) is a straight line segment or a concave arc segment. The first cutting edge segment (222) and the convex arc segment (221) are smoothly and tangentially connected.

9. The manufacturing process of a high wear-resistant drill bit according to claim 7, characterized in that: The radius R of the convex arc segment (221) is set in the range of 0.5mm to 3.0mm.

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