Non-magnetic composite hard alloy material and preparation method thereof

Abstract

The invention relates to the technical field of hard alloy, and discloses a non-magnetic composite hard alloy material and a preparation method thereof.The non-magnetic composite hard alloy material is prepared from 70%-80% of tungsten carbide, 10%-12% of nickel, 2%-3% of molybdenum, 4%-5% of titanium, 1.8%-2.2% of vanadium, 1.8%-2.2% of chromium, 2%-3% of niobium, 2%-3% of tantalum and 2%-3% of zirconium. The non-magnetic composite hard alloy material with excellent performance is successfully prepared by adopting a segmented atmosphere sintering process, the hardness and the toughness of the non-magnetic composite hard alloy material are remarkably improved compared with those of a previous product, the service life of the non-magnetic composite hard alloy material in the field of mold manufacturing is greatly prolonged, and the non-magnetic composite hard alloy material is high in strength, good in toughness, wear-resistant, good in thermal shock resistance and high in cost performance. The performance of the non-magnetic composite hard alloy material is superior to that of a traditional hard alloy material, and the requirements of special application scenes can be met.

Description

Technical Field

[0001] The invention relates to the technical field of cemented carbide, in particular to a non-magnetic composite cemented carbide material and a preparation method thereof. Background Art

[0002] With the continuous development of industrial technology, the performance requirements for cemented carbide materials are getting higher and higher. In some special application scenarios, the magnetic properties of traditional cemented carbide may have an adverse effect on the use effect, such as:

[0003] Electromagnetic interference: In the fields of electronic equipment, precision instruments, etc., if the carbide parts have strong magnetism, it may interfere with the normal distribution and transmission of the electromagnetic field, affect the performance and accuracy of the equipment, and cause signal distortion, increased errors, etc. For example, in the manufacture of high-precision electronic circuit boards, if carbide tools with strong magnetism are used, it may interfere with the electromagnetic signal of the circuit and affect product quality.

[0004] Adsorption of impurities: Magnetism may cause cemented carbide materials to absorb surrounding magnetic impurities, such as tiny iron filings, iron powder, etc. The adsorption of these impurities may wear or scratch the surface in contact with them, affecting the processing accuracy and product quality. For example, in the processing of optical lenses, adsorbed impurities may cause scratches on the lens surface.

[0005] Influence on magnetic field-related processes: In some processes that rely on magnetic fields for processing or operation, the magnetism of cemented carbide materials may interfere with the distribution and intensity of the magnetic field, thereby affecting the process effect. For example, in some special magnetron sputtering coating processes, magnetic cemented carbide parts may disrupt the magnetic field, resulting in uneven coating.

[0006] Not suitable for certain special environments: In a strong magnetic field environment or an environment sensitive to magnetism, cemented carbide with strong magnetism may not work properly or may have an adverse effect on the surrounding environment. For example, in a magnetic resonance imaging (MRI) device, magnetic components may interfere with the imaging effect or even damage the device.

[0007] Limited application scope: In some industries with strict restrictions on magnetism, such as aerospace, medical, etc., the magnetism of traditional cemented carbide may make it unable to meet application requirements, thus limiting its scope of use.

[0008] The existing non-magnetic cemented carbide materials still have deficiencies in performance, such as hardness, strength, wear resistance, etc., which cannot fully meet the requirements of certain special application scenarios. To this end, we proposed a non-magnetic composite cemented carbide material and its preparation method. Summary of the invention

[0009] The purpose of the present invention is to provide a non-magnetic composite cemented carbide material and a preparation method thereof, which solves the problems raised in the above background technology.

[0010] To achieve the above object, the present invention provides the following technical solution: a method for preparing a non-magnetic composite hard alloy material, wherein the non-magnetic composite hard alloy material is prepared from the following component proportions:

[0011] Tungsten carbide: 70-80%, nickel: 10-12%, molybdenum: 2-3%, titanium: 4-5%, vanadium: 1.8-2.2%, chromium: 1.8-2.2%, niobium: 2-3%, tantalum: 2-3%, zirconium: 2-3%;

[0012] The preparation method comprises the following steps:

[0013] S1. Ingredients

[0014] Take tungsten carbide, nickel, molybdenum, titanium, vanadium, chromium, niobium, tantalum and zirconium according to the above composition ratio;

[0015] S2, ball mill

[0016] The weighed raw materials are placed in a ball mill for ball milling, and the ball milling medium is anhydrous ethanol;

[0017] S3. Drying

[0018] The ball-milled material is dried to remove anhydrous ethanol;

[0019] S4. Suppression

[0020] The dried material is placed in a mold and pressed at a pressure of 100-200MPa;

[0021] S5. Sintering

[0022] The pressed green body is placed in a sintering furnace for sintering.

[0023] Preferably, the particle size of the tungsten carbide is 2.0-5.0 μm, the particle size of the nickel is 1.5-3.5 μm; the particle size of the molybdenum is 1.8-3.5 μm; the particle size of the titanium is 1.0-3.0 μm; the particle size of the vanadium, chromium, niobium, tantalum and zirconium is 1.5-3.5 μm.

[0024] Preferably, in S1 and S2, tungsten carbide, nickel, molybdenum, titanium, vanadium, chromium, niobium, tantalum and zirconium are ball-milled and mixed evenly, and then mixed with anhydrous ethanol at a mixing temperature of 900-1050° C. for 10-20 hours.

[0025] Preferably, in S2, the material after ball milling is dried and heated to remove anhydrous ethanol in the material.

[0026] Preferably, after S3 is completed, the dried material is placed in a mold and punched to shape the material, and the punching time is 3-5 hours.

[0027] Preferably, after the S4 completes the stamping of the material, the pressed green body needs to be placed in a sintering furnace to obtain a carbon-poor pre-sintered matrix. During the sintering process, the sintering temperature is 1300-1500°C. The sintering temperature, time and atmosphere are precisely controlled. Sintering in a vacuum or inert atmosphere helps to reduce the effects of oxidation and impurities, thereby reducing magnetism. Step-by-step sintering or slow heating is used to promote the homogenization of the organizational structure and reduce the formation of magnetic phases.

[0028] Preferably, in S5, the carbon-poor pre-sintered matrix obtained after the green body is sintered is kept warm for 1-3 hours, and the sintered cemented carbide is cryogenically treated to change the microstructure of the material, which helps to reduce magnetism.

[0029] Preferably, the dryer comprises a mounting plate, a supporting leg is fixedly mounted on the bottom of the mounting plate, a drying assembly is arranged at the bottom of the mounting plate, the drying assembly comprises a vibration mechanism fixedly mounted on the bottom of the mounting plate, the vibration mechanism comprises a motor 1 fixedly mounted on the bottom of the mounting plate, an output shaft 1 is fixedly mounted on the output end of the motor 1, a gear is fixedly mounted on the outer wall of the other end of the output shaft 1, a side wall of the gear is meshed with a gear ring, a rotating ring is fixedly mounted on the inner wall of the gear ring, the bottom inner wall of the rotating ring is slidably connected to a limited position block, the The other end of the limit block is fixedly installed with an L-shaped support block, and the other end of the L-shaped support block is fixedly connected to the bottom of the mounting plate, a protrusion one is fixedly installed on the top of the rotating ring, and a protrusion two is slidably connected to the top of the protrusion one, and a drying cylinder is fixedly installed on the top of the protrusion two, and the bottom of the drying cylinder is connected to a discharge hopper, and a valve is fixedly installed on the bottom outer wall of the discharge hopper, and the top of the drying cylinder is connected to a feed hopper, and a fixing ring is fixed to the outer wall of the middle part of the drying cylinder, and a sliding block is fixedly installed on the outer wall of the fixing ring, and the inner wall of the sliding block slides The movable connection limit column, the bottom of the limit column is fixedly connected to the top of the mounting plate, the bottom of the slider is fixedly connected to a buffer spring, and the other end of the buffer spring is fixedly connected to the top of the mounting plate. By arranging a vibration mechanism, when it is necessary to feed the material into the dryer for drying, the operator can put the material into the drying drum through the feed hopper, and realize the drying of the material through the drying drum. In the process of drying the material inside the drying drum, the operator can turn on the motor 1 to cause the output shaft 1 to rotate. In the process of the output shaft 1 rotating, the gear will rotate, and in the process of the gear rotating, it will mesh with the gear ring, causing the outer wall of the limit block surrounded by the rotating ring to rotate, causing the protrusion 1 to rotate, and in the process of the protrusion 1 rotating, it will squeeze the protrusion 2, so as to cause the drying drum to move upward. Under the buffering effect of the slider, the limit column and the buffer spring on the drying drum, the vibration of the drying drum will be realized in the process of the protrusion 1 and the protrusion 2 squeezing, so as to prevent the material from accumulating and affecting the drying effect in the process of drying the material inside the drying drum, so as to improve the drying effect of the material.

[0030] The drying drum is provided with a toggle mechanism inside. By providing a vibration mechanism, the first and second convex blocks can be squeezed to achieve vibration of the drying drum, so as to vibrate the material inside the drying drum and improve the drying effect of the drying drum on the material. By providing a toggle mechanism, the toggle plate can be rotated to achieve toggle of the material inside the drying drum and improve the drying effect of the material.

[0031] Preferably, the toggle mechanism includes a second motor fixedly mounted on the top of the drying cylinder, an output shaft second being fixedly mounted on the output end of the second motor, the second output shaft second movably passes through the top of the drying cylinder and extends to the interior of the drying cylinder, a U-shaped plate is fixedly mounted on the outer wall of the second output shaft, and a toggle plate is fixedly mounted on the inner wall of the U-shaped plate. By setting up the toggle mechanism, during the process of drying the material, the operator can turn on the second motor, thereby causing the second output shaft to rotate, causing the U-shaped plate to rotate, causing the toggle plate to rotate, causing the toggle plate to toggle the material inside the drying cylinder, and causing the inside of the drying cylinder to achieve uniform drying of the material.

[0032] Preferably, the outer wall of the drying cylinder is slidably connected to the inner wall of the mounting plate, and the inner wall of the mounting plate is matched with the outer wall of the drying cylinder. This arrangement facilitates the sliding of the drying cylinder inside the mounting plate.

[0033] Preferably, the non-magnetic composite cemented carbide material is prepared by any of the above methods.

[0034] The present invention provides a non-magnetic composite hard alloy material and a preparation method thereof. The non-magnetic composite hard alloy material and the preparation method thereof have the following beneficial effects:

[0035] (1) The non-magnetic composite cemented carbide material of the present invention has extremely low magnetism and can meet the requirements of use in special magnetic field environments, such as applications in electronic equipment, precision instruments, strong magnetic field environments, and the like.

[0036] (2) By optimizing the composition and preparation process, the hardness, strength and wear resistance of the material are significantly improved. The hardness can reach 95HR, the strength can reach 4500MPa, and the wear resistance is increased by 40% compared with traditional cemented carbide.

[0037] (3) The material has good processing properties and can be widely used in mold manufacturing, mechanical processing, aerospace, medical and other fields, providing these fields with a material option with better performance. The preparation method of the present invention is simple in process, easy to operate and control, and is conducive to large-scale production.

[0038] (4) By setting a vibration mechanism, when it is necessary to feed the material into the dryer for drying, the operator can put the material into the drying drum through the feed hopper, and dry the material through the drying drum. In the process of drying the material in the drying drum, the operator can turn on the motor 1 to cause the output shaft 1 to rotate. In the process of the output shaft 1 rotating, the gear will rotate, and in the process of the gear rotating, it will mesh with the gear ring, causing the outer wall of the limit block surrounded by the rotating ring to rotate, causing the protrusion 1 to rotate, and in the process of the protrusion 1 rotating, it will squeeze the protrusion 2, causing the drying drum to move upward. Under the buffering effect of the slider, the limit column and the buffer spring on the drying drum, the drying drum will vibrate in the process of the protrusion 1 and the protrusion 2 squeezing each other, so as to prevent the material from accumulating and affecting the drying effect in the process of drying the material in the drying drum, so as to improve the drying effect of the material.

[0039] (5) By setting up a toggle mechanism, during the process of drying the material, the operator can turn on the motor 2 to cause the output shaft 2 to rotate, the U-shaped plate to rotate, the toggle plate to rotate, and the toggle plate to toggle the material inside the drying cylinder, so that the material inside the drying cylinder can be evenly dried. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a preparation flow chart of the present invention;

[0041] Figure 2 It is a three-dimensional structural schematic diagram of the drying machine in the present invention;

[0042] Figure 3 It is a structural schematic diagram of a drying component of the drying machine in the present invention;

[0043] Figure 4 It is a structural schematic diagram of the vibration mechanism of the dryer in the present invention;

[0044] Figure 5 It is a structural schematic diagram of the toggle mechanism of the drying mechanism in the present invention.

[0045] In the figure: 1. mounting plate; 2. supporting leg; 3. drying assembly; 31. vibration mechanism; 311. motor 1; 312. output shaft 1; 313. gear; 314. gear ring; 315. rotating ring; 316. limit block; 317. L-shaped supporting block; 318. protrusion 1; 319. protrusion 2; 3110. drying cylinder; 3111. discharge hopper; 3112. valve; 3113. fixing ring; 3114. slider; 3115. limit column; 3116. buffer spring; 3117. feed hopper; 32. toggle mechanism; 321. motor 2; 322. output shaft 2; 323. U-shaped plate; 324. toggle plate. DETAILED DESCRIPTION

[0046] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the following is a specific implementation of the present invention.

[0047] Example 1

[0048] The non-magnetic composite hard alloy material provided by the present invention is prepared from the following components in proportion:

[0049] Composition: 70% tungsten carbide, 12% nickel, 2% molybdenum, 5% titanium, 1.8% vanadium, 2.2% chromium, 2% niobium, 3% tantalum, 2% zirconium

[0050] Preparation method:

[0051] Ingredients: Weigh the raw materials according to the above proportions.

[0052] Ball milling: ball milling for 15 hours in a ball mill, the ball milling medium is anhydrous ethanol.

[0053] Drying: Drying treatment removes anhydrous ethanol.

[0054] Pressing: Pressing at a pressure of 150 MPa.

[0055] Sintering: Sinter at 1400℃ and keep warm for 2 hours.

[0056] Example 2

[0057] The non-magnetic composite hard alloy material provided by the present invention is prepared from the following components in proportion:

[0058] Composition: 75% tungsten carbide, 10% nickel, 3% molybdenum, 4% titanium, 2% vanadium, 2% chromium, 3% niobium, 2% tantalum, 3% zirconium

[0059] Preparation method:

[0060] Ingredients: Weigh the raw materials according to the above proportions.

[0061] Ball milling: ball mill for 18 hours in a ball mill, and the ball milling medium is anhydrous ethanol.

[0062] Drying: Drying treatment removes anhydrous ethanol.

[0063] Pressing: Pressing at a pressure of 180 MPa.

[0064] Sintering: Sinter at 1450℃ and keep warm for 2.5 hours.

[0065] Example 3

[0066] The non-magnetic composite hard alloy material provided by the present invention is prepared from the following components in proportion:

[0067] Composition: 80% tungsten carbide, 10% nickel, 2% molybdenum, 4% titanium, 2% vanadium, 1.8% chromium, 2% niobium, 2% tantalum (Ta), 2.2% zirconium

[0068] Preparation method:

[0069] Ingredients: Weigh the raw materials according to the above proportions.

[0070] Ball milling: ball milling for 20 hours in a ball mill, the ball milling medium is anhydrous ethanol.

[0071] Drying: Drying treatment removes anhydrous ethanol.

[0072] Pressing: Pressing at a pressure of 200 MPa.

[0073] Sintering: Sinter at 1500℃ and keep warm for 3 hours.

[0074] Function of each ingredient:

[0075] Tungsten carbide: As the main component of cemented carbide, it provides high hardness and wear resistance.

[0076] Nickel: acts as a bonding phase to improve the toughness and strength of the material.

[0077] Molybdenum: can improve the strength and thermal stability of the material.

[0078] Titanium: has good strength and corrosion resistance, improves the performance of cemented carbide.

[0079] Vanadium: can improve the hardness and wear resistance of cemented carbide.

[0080] Chromium: helps to enhance the corrosion and oxidation resistance of cemented carbide.

[0081] Niobium: can improve the high temperature performance and strength of the material.

[0082] Tantalum: It can effectively refine grains and improve the strength and toughness of materials.

[0083] Zirconium: Can improve the performance of cemented carbide to a certain extent.

[0084] Example 4

[0085] On the basis of Example 1, Example 2 and Example 3, a preferred embodiment of a non-magnetic composite cemented carbide material and a preparation method thereof provided by the present invention is as follows: Figures 1 to 5As shown: the dryer includes a mounting plate 1, a supporting leg 2 is fixedly installed at the bottom of the mounting plate 1, a drying assembly 3 is arranged at the bottom of the mounting plate 1, the drying assembly 3 includes a vibration mechanism 31 fixedly installed at the bottom of the mounting plate 1, the vibration mechanism 31 includes a motor 311 fixedly installed at the bottom of the mounting plate 1, an output shaft 312 is fixedly installed at the output end of the motor 311, a gear 313 is fixedly installed on the outer wall of the other end of the output shaft 312, a side wall of the gear 313 is meshed with a gear ring 314, a rotating ring 315 is fixedly installed on the inner wall of the gear ring 314, a limiting block 316 is slidably connected to the bottom inner wall of the rotating ring 315, an L-shaped support block 317 is fixedly installed on the other end of the limiting block 316, the other end of the L-shaped support block 317 is fixedly connected to the bottom of the mounting plate 1, and the top of the rotating ring 315 A protrusion 318 is fixedly installed on the top of the protrusion 1 318, a protrusion 2 319 is slidably connected to the top of the protrusion 2 319, a drying cylinder 3110 is fixedly installed on the top of the protrusion 2 319, a discharge hopper 3111 is connected to the bottom of the drying cylinder 3110, a valve 3112 is fixedly installed on the bottom outer wall of the discharge hopper 3111, a feed hopper 3117 is connected to the top of the drying cylinder 3110, a fixing ring 3113 is fixed to the outer wall of the middle part of the drying cylinder 3110, a slider 3114 is fixedly installed on the outer wall of the fixing ring 3113, a limiting column 3115 is slidably connected to the inner wall of the slider 3114, the bottom of the limiting column 3115 is fixedly connected to the top of the mounting plate 1, a buffer spring 3116 is fixedly connected to the bottom of the slider 3114, and the other end of the buffer spring 3116 is fixedly connected to the top of the mounting plate 1;

[0086] The drying drum 3110 is provided with a toggle mechanism 32 inside. By providing a vibration mechanism 31, extrusion can be generated by the protrusion 1 318 and the protrusion 2 319 to realize the vibration of the drying drum 3110, so as to vibrate the material inside the drying drum 3110 and improve the drying effect of the drying drum 3110 on the material. By providing the toggle mechanism 32, the toggle plate 324 can be rotated to realize the toggle of the material inside the drying drum 3110 and improve the drying effect of the material.

[0087] In this embodiment, by setting the vibration mechanism 31, when it is necessary to feed the material into the dryer for drying, the operator can put the material into the drying cylinder 3110 through the feed hopper 3117, and dry the material through the drying cylinder 3110. During the process of drying the material in the drying cylinder 3110, the operator can turn on the motor 1 311 to cause the output shaft 1 312 to rotate. During the rotation of the output shaft 1 312, the gear 313 will rotate. During the rotation of the gear 313, it will mesh with the gear ring 314, causing the rotating ring 31 The outer wall of the limiting block 316 around the inner wall rotates, causing the protrusion 1 318 to rotate. During the rotation of the protrusion 1 318, the protrusion 2 319 is squeezed, causing the drying cylinder 3110 to move upward. Under the buffering effect of the slider 3114, the limiting column 3115 and the buffer spring 3116 on the drying cylinder 3110, the drying cylinder 3110 vibrates during the squeezing of the protrusion 1 318 against the protrusion 2 319, so as to prevent the material from being piled up and affecting the drying effect during the drying process inside the drying cylinder 3110, so as to improve the drying effect of the material.

[0088] Furthermore, the toggle mechanism 32 includes a motor 321 fixedly mounted on the top of the drying cylinder 3110, an output shaft 322 is fixedly mounted on the output end of the motor 321, the output shaft 322 movably passes through the top of the drying cylinder 3110 and extends to the interior of the drying cylinder 3110, a U-shaped plate 323 is fixedly mounted on the outer wall of the output shaft 322, and a toggle plate 324 is fixedly mounted on the inner wall of the U-shaped plate 323. By setting the toggle mechanism 32, during the process of drying the material, the operator can turn on the motor 321 to cause the output shaft 322 to rotate, cause the U-shaped plate 323 to rotate, cause the toggle plate 324 to rotate, cause the toggle plate 324 to toggle the material inside the drying cylinder 3110, and cause the inside of the drying cylinder 3110 to achieve uniform drying of the material.

[0089] Furthermore, the outer wall of the drying cylinder 3110 is slidably connected to the inner wall of the mounting plate 1 , and the inner wall of the mounting plate 1 is matched with the outer wall of the drying cylinder 3110 . This arrangement facilitates the sliding of the drying cylinder 3110 inside the mounting plate 1 .

[0090] The performance of the non-magnetic composite cemented carbide material prepared in the above embodiments is tested, and the results show that its performance is better than that of the traditional cemented carbide material and can meet the requirements of special application scenarios.

[0091] In the present invention, unless otherwise clearly specified and limited, the terms such as installation, connection, connection, fixing, etc. should be understood in a broad sense, for example, it can be fixed connection, detachable connection, or integrated, mechanical connection, electrical connection, direct connection, or indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0092] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for preparing a non-magnetic composite hard alloy material, wherein the non-magnetic composite hard alloy material is prepared from the following components in proportion: Tungsten carbide: 70-80%, nickel: 10-12%, molybdenum: 2-3%, titanium: 4-5%, vanadium: 1.8-2.2%, chromium: 1.8-2.2%, niobium: 2-3%, tantalum: 2-3%, zirconium: 2-3%; Features: The preparation method comprises the following steps: S1. Ingredients Take tungsten carbide, nickel, molybdenum, titanium, vanadium, chromium, niobium, tantalum and zirconium according to the above composition ratio; S2, ball mill The weighed raw materials are placed in a ball mill for ball milling, and the ball milling medium is anhydrous ethanol; S3. Drying The ball-milled material is dried to remove anhydrous ethanol; S4. Suppression The dried material is placed in a mold and pressed at a pressure of 100-200MPa; S5. Sintering The pressed green body is placed in a sintering furnace for sintering.

2. The method for preparing a non-magnetic composite hard alloy material according to claim 1, characterized in that: The particle size of the tungsten carbide is 2.0-5.0 μm, the particle size of the nickel is 1.5-3.5 μm; the particle size of the molybdenum is 1.8-3.5 μm; the particle size of the titanium is 1.0-3.0 μm; the particle size of the vanadium, chromium, niobium, tantalum and zirconium is 1.5-3.5 μm.

3. The method for preparing a non-magnetic composite hard alloy material according to claim 1, characterized in that: In S1 and S2, tungsten carbide, nickel, molybdenum, titanium, vanadium, chromium, niobium, tantalum and zirconium are ball-milled and mixed evenly, and then mixed with anhydrous ethanol at a mixing temperature of 900-1050° C. for 10-20 hours.

4. The method for preparing a non-magnetic composite hard alloy material according to claim 1, characterized in that: In S3, the material after ball milling is put into a dryer, and the material is repeatedly dried by the dryer to remove the anhydrous ethanol in the material, so as to dry the material after ball milling. Then, the dried material is put into a mold for stamping to shape the material, and the stamping time is 3-5 hours. After the stamping of the material is completed in S4, the pressed green body needs to be put into a sintering furnace to obtain a carbon-poor pre-sintered matrix. During the sintering process, the sintering temperature is 1300-1500°C. The sintering temperature, time and atmosphere are accurately controlled. Sintering in a vacuum or inert atmosphere helps to reduce the influence of oxidation and impurities, thereby reducing magnetism. Step-by-step sintering or slow heating is used to promote the homogenization of the organizational structure and reduce the formation of magnetic phases. In S5, the carbon-poor pre-sintered matrix obtained after the green body is sintered is kept warm for 1-3 hours. The sintered cemented carbide is deep-cold treated to change the microstructure of the material, which helps to reduce magnetism.

5. The method for preparing a non-magnetic composite hard alloy material according to claim 4, characterized in that: The dryer comprises a mounting plate (1), a supporting leg (2) is fixedly mounted on the bottom of the mounting plate (1), a drying assembly (3) is arranged on the bottom of the mounting plate (1), the drying assembly (3) comprises a vibration mechanism (31) fixedly mounted on the bottom of the mounting plate (1), the vibration mechanism (31) comprises a motor (311) fixedly mounted on the bottom of the mounting plate (1), an output shaft (312) is fixedly mounted on the output end of the motor (311), and the output shaft (312) ) is fixedly mounted on the outer wall of the other end of the mounting plate (1), a gear (313) is meshed with a gear ring (314) on the side wall of the gear (313), a rotating ring (315) is fixedly mounted on the inner wall of the gear ring (314), a limiting block (316) is slidably connected to the bottom inner wall of the rotating ring (315), an L-shaped supporting block (317) is fixedly mounted on the other end of the limiting block (316), the other end of the L-shaped supporting block (317) is fixedly connected to the bottom of the mounting plate (1), and the rotating ring (31 5) is fixedly installed with a protrusion 1 (318) on the top, the top of the protrusion 1 (318) is slidably connected with a protrusion 2 (319), the top of the protrusion 2 (319) is fixedly installed with a drying cylinder (3110), the bottom of the drying cylinder (3110) is connected to a discharge hopper (3111), the bottom outer wall of the discharge hopper (3111) is fixedly installed with a valve (3112), the top of the drying cylinder (3110) is connected to a feed hopper (3117), and the drying cylinder A fixing ring (3113) is fixed to the outer wall of the middle part (3110), a slider (3114) is fixedly installed on the outer wall of the fixing ring (3113), the inner wall of the slider (3114) is slidably connected to a limiting column (3115), the bottom of the limiting column (3115) is fixedly connected to the top of the mounting plate (1), the bottom of the slider (3114) is fixedly connected to a buffer spring (3116), and the other end of the buffer spring (3116) is fixedly connected to the top of the mounting plate (1); A toggle mechanism (32) is provided inside the drying cylinder (3110).

6. The method for preparing a non-magnetic composite hard alloy material according to claim 5, characterized in that: The toggle mechanism (32) comprises a second motor (321) fixedly mounted on the top of the drying cylinder (3110); a second output shaft (322) is fixedly mounted on the output end of the second motor (321); the second output shaft (322) movably passes through the top of the drying cylinder (3110) and extends to the interior of the drying cylinder (3110); a U-shaped plate (323) is fixedly mounted on the outer wall of the second output shaft (322); and a toggle plate (324) is fixedly mounted on the inner wall of the U-shaped plate (323).

7. The method for preparing a non-magnetic composite hard alloy material according to claim 5, characterized in that: The outer wall of the drying cylinder (3110) is slidably connected to the inner wall of the mounting plate (1), and the inner wall of the mounting plate (1) is adapted to the outer wall of the drying cylinder (3110).

8. A non-magnetic composite hard alloy material, characterized in that: The non-magnetic composite hard alloy material is prepared by any one of the methods in claims 1-7.

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