Preparation method of metal / high-toughness resin-based composite material

Abstract

The invention provides a preparation method of a metal / high-toughness resin-based composite material. The preparation method comprises the following steps: preparing micron-sized spherical particles from steel, aluminum alloy and titanium alloy through an atomization method; the spherical particles are placed in a water-based cleaning agent to be cleaned; the cleaned micron-sized spherical particles of the steel, the aluminum alloy and the titanium alloy are subjected to laser forming to form the porous metal component; stress relief annealing treatment is conducted on the formed porous metal component; cleaning the porous metal component; mixing the resin, the curing agent and the carbon fiber reinforced phase in proportion, uniformly stirring, carrying out vacuum defoaming, removing bubbles, adding the carbon fibers, stirring to ensure that the carbon fibers are uniformly dispersed in the resin, and adding the coupling agent; and the mixed resin is injected into the porous metal component to be cured, and polishing and repairing are conducted according to requirements. The problems of metal light weight, corrosion-resistant protection, crack resistance and the like are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal and resin-based composite material preparation, and particularly relates to a preparation method of metal / high-toughness resin-based composite material. BACKGROUND

[0002] In the development of society, metal materials and resin-based composite materials are widely used in the fields of aerospace, automobile manufacturing, etc. Compared with resin-based composite materials, metal materials usually have a greater density, and thus have a greater weight, which hinders the development of lightweight materials. Metals are also prone to corrosion in humid environments and need additional protective treatment, such as painting, to protect them. In addition, metals are prone to crack under load, and high-toughness resin-based composite materials can inhibit crack propagation and improve the crack resistance of materials. However, metal materials usually have higher strength and stiffness, and are suitable for bearing high load stress. At the same time, metal materials have relatively low costs in large-scale production, are suitable for high-yield applications, and are easy to recycle and reuse. By combining the advantages of metal materials and high-toughness resin-based composite materials, i.e., metal materials providing strength and high-toughness resin-based composite materials reducing weight, the combination of high strength and lightweight is achieved.

[0003] The development of additive manufacturing technology (3D printing) provides an opportunity for the combination of the two materials and also solves the problem of poor adhesion of metal and resin-based composite materials. The principle of this method is to use additive manufacturing technology to prepare metal materials into a porous structure, then clean the surface impurities of the porous metal structure and dry the metal component, and then inject resin-based composite materials into the porous metal material by vacuum impregnation, so that the porous metal material component plays the role of "skeleton". SUMMARY

[0004] The present application provides a preparation method of metal / high-toughness resin-based composite material, which solves the problems of metal lightweight, corrosion protection, and crack resistance, and also solves the problem of poor adhesion of metal components and resin-based composite materials.

[0005] To solve the above technical problems, the present application provides a preparation method of metal / high-toughness resin-based composite material, which comprises the following steps: S1: preparing micron-sized spherical particles of steel, aluminum alloy, and titanium alloy by atomization; S2: placing the micron-sized spherical particles of steel, aluminum alloy, and titanium alloy in a water-based cleaning agent for ultrasonic cleaning, and then performing filtration treatment after cooling to room temperature, and finally performing vacuum drying on the micron-sized spherical particles; S3: laser forming a porous metal component from the cleaned micron-sized spherical particles of steel, aluminum alloy, and titanium alloy, and using a computer to slice the three-dimensional graphics; S4: Stress-relief annealing is performed on the formed porous metal components. When the temperature is cooled to a certain temperature in the furnace, the components are removed from the furnace and air-cooled to room temperature. S5: Place the porous metal component in a mixed solution of acetone and anhydrous ethanol, clean it with ultrasonic waves to remove oil and impurities, then dry the metal component, put the cleaned metal component back into the anhydrous ethanol solution, and then put it into a drying oven for drying. S6: Mix resin, curing agent, and carbon fiber reinforcing phase in proportion, stir evenly, degas under vacuum to remove air bubbles, add carbon fiber, stir to ensure that carbon fiber is evenly dispersed in resin, and add coupling agent. S7: Place the porous metal component into the vacuum chamber, evacuate the vacuum, inject the mixed resin into the porous metal component, ensuring that the resin completely submerges the porous metal component, and finally release the vacuum. Use atmospheric pressure to allow the resin to penetrate into the pores, then heat and cure the resin, ensuring that the resin is completely cured, remove excess resin, and perform polishing and repair as required.

[0006] Furthermore, the particle size of the spherical particles is 25-35 micrometers.

[0007] Furthermore, in step S2, the cleaning temperature is 45℃-65℃, and the cleaning time is 1h-2h.

[0008] Furthermore, in S3, the laser power is 250W-800W, the scanning speed is 300mm / s-1000mm / s, and the scanning strategy is a bow-shaped movement.

[0009] Furthermore, in S4, the stress-relief annealing temperature is 600℃-650℃, the holding time is 2h-5h, and the furnace is cooled to 260℃-300℃ before air cooling.

[0010] Furthermore, in S5, the volume ratio of acetone to anhydrous ethanol is 1.5:98.5.

[0011] Furthermore, the carbon fiber content in the resin in S6 ranges from 30% to 65%.

[0012] Furthermore, in S7, the heating temperature is 60℃-150℃, and the curing time is 0.5h-8h.

[0013] The above-described one or more technical solutions of the present invention have at least one or more of the following technical effects: This invention achieves lightweighting of metal structural components, combining high strength and lightweight; the addition of high-toughness resin composite material inhibits the initiation and propagation of cracks; effectively protects metal materials from corrosion, and solves the problem of weak adhesion between metal and resin-based composite materials. Attached Figure Description

[0014] Figure 1 : Schematic diagram of the porous metal structure of the present invention. Detailed Implementation

[0015] This invention provides a method for preparing a metal / high-toughness resin-based composite material, which solves problems such as lightweight metal, corrosion protection, and crack resistance, while also addressing the issue of weak adhesion between metal components and resin-based composite materials.

[0016] The technical solutions of 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 of the embodiments obtained. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art are within the scope of protection of the present invention.

[0017] A method for preparing a metal / high-toughness resin-based composite material includes the following steps: S1: Prepare spherical particles of 25-35 micrometers by atomization of steel, aluminum alloy, and titanium alloy; S2: Micron-sized spherical particles of steel, aluminum alloy, and titanium alloy are placed in a water-based cleaning agent for ultrasonic cleaning, cooled to room temperature, filtered, and finally vacuum dried; the cleaning temperature is 45℃-65℃, and the cleaning time is 1h-2h. S3: Laser-forming porous metal components from cleaned, micron-sized spherical particles of steel, aluminum alloy, and titanium alloy, such as... Figure 1 As shown, the three-dimensional graphic is sliced ​​using a computer. During the forming process, 99.99% pure argon gas is used for protection to prevent oxidation. The laser power is 250W-800W, the scanning speed is 300mm / s-1000mm / s, and the scanning strategy is a bow-shaped movement. S4: Stress-relief annealing is performed on the formed porous metal components. When the temperature is cooled to a certain temperature in the furnace, the components are removed from the furnace and air-cooled to room temperature. The stress-relief annealing temperature is 600℃-650℃, the holding time is 2h-5h, and the components are air-cooled after being cooled to 260℃-300℃ in the furnace. S5: Place the porous metal component in a mixed solution of acetone and anhydrous ethanol, clean it with ultrasonic waves to remove oil and impurities, then dry the metal component, and place the cleaned metal component back into the anhydrous ethanol solution, and then put it into a drying oven for drying treatment; the volume ratio of acetone to anhydrous ethanol is 1.5:98.5. S6: Mix resin, curing agent, and carbon fiber reinforcement phase in proportion, stir evenly, degas under vacuum to remove air bubbles, add carbon fiber, stir to ensure the carbon fiber is evenly dispersed in the resin, and add coupling agent; the carbon fiber content in the resin ranges from 30% to 65%. S7: Place the porous metal component into the vacuum chamber, evacuate the vacuum, inject the mixed resin into the porous metal component, ensuring that the resin completely submerges the porous metal component, and finally release the vacuum. Use atmospheric pressure to allow the resin to penetrate into the pores, then heat and cure the resin at a temperature of 60℃-150℃ for 0.5h-8h, ensuring that the resin is completely cured. Remove excess resin and perform grinding and repair as required.

Claims

1. A method for preparing a metal / high-toughness resin-based composite material, characterized in that, Includes the following steps: S1: Micron-sized spherical particles are prepared from steel, aluminum alloy, and titanium alloy by atomization. S2: Micron-sized spherical particles of steel, aluminum alloy, and titanium alloy are placed in a water-based cleaning agent for ultrasonic cleaning, cooled to room temperature, filtered, and finally vacuum dried. S3: The cleaned steel, aluminum alloy, and titanium alloy micron-sized spherical particles are laser-formed into porous metal components, and the three-dimensional graphics are sliced ​​using a computer. S4: Stress-relief annealing is performed on the formed porous metal components. When the temperature is cooled to a certain temperature in the furnace, the components are removed from the furnace and air-cooled to room temperature. S5: Place the porous metal component in a mixed solution of acetone and anhydrous ethanol, clean it with ultrasonic waves to remove oil and impurities, then dry the metal component, put the cleaned metal component back into the anhydrous ethanol solution, and then put it into a drying oven for drying. S6: Mix resin, curing agent, and carbon fiber reinforcing phase in proportion, stir evenly, degas under vacuum to remove air bubbles, add carbon fiber, stir to ensure that carbon fiber is evenly dispersed in resin, and add coupling agent. S7: Place the porous metal component into the vacuum chamber, evacuate the vacuum, inject the mixed resin into the porous metal component, ensuring that the resin completely submerges the porous metal component, and finally release the vacuum. Use atmospheric pressure to allow the resin to penetrate into the pores, then heat and cure the resin, ensuring that the resin is completely cured, remove excess resin, and perform polishing and repair as required.

2. The method for preparing the metal / high-toughness resin-based composite material according to claim 1, characterized in that: The spherical particles have a diameter of 25-35 micrometers.

3. The method for preparing the metal / high-toughness resin-based composite material according to claim 1, characterized in that: The cleaning temperature in S2 is 45℃-65℃, and the cleaning time is 1h-2h.

4. The method for preparing the metal / high-toughness resin-based composite material according to claim 1, characterized in that: The laser power in S3 is 250W-800W, the scanning speed is 300mm / s-1000mm / s, and the scanning strategy is a bow-shaped movement.

5. The method for preparing the metal / high-toughness resin-based composite material according to claim 1, characterized in that: In the S4 process, the stress-relief annealing temperature is 600℃-650℃, the holding time is 2h-5h, and the furnace is cooled to 260℃-300℃ before air cooling.

6. The method for preparing the metal / high-toughness resin-based composite material according to claim 1, characterized in that: The volume ratio of acetone to anhydrous ethanol in S5 is 1.5:98.

5.

7. The method for preparing the metal / high-toughness resin-based composite material according to claim 1, characterized in that: The carbon fiber content in the resin in S6 ranges from 30% to 65%.

8. The method for preparing the metal / high-toughness resin-based composite material according to claim 1, characterized in that: The heating temperature in S7 is 60℃-150℃, and the curing time is 0.5h-8h.

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