Preparation method of basalt fiber reinforced magnesium alloy material

Abstract

The application relates to a preparation method of a basalt fiber reinforced magnesium alloy material and belongs to the field of metal materials.The preparation method comprises the following steps: roughening, sensitizing, silver plating and nickel plating of basalt fibers in sequence to obtain modified basalt fibers; and mixing the obtained modified basalt fibers and magnesium powder and then performing hot isostatic pressing treatment to obtain a basalt fiber reinforced magnesium alloy material.The preparation method provided by the application adopts a specific treatment process, the performance of the obtained basalt fiber reinforced magnesium alloy material is improved through the hot isostatic pressing after the silver plating and the nickel plating of the basalt fibers, the high-temperature resistance, the specific strength and the specific modulus of the basalt fiber reinforced magnesium alloy material are remarkably improved, and the service performance of the basalt fiber reinforced magnesium alloy material is ensured.

Description

Technical Field

[0001] This invention relates to the field of metallic materials, specifically to a method for preparing basalt fiber reinforced magnesium alloy materials. Background Technology

[0002] Currently, magnesium is commonly used in automotive structural components with high mechanical performance requirements. However, as automotive demands for strength and high-temperature resistance in certain structural components increase, magnesium alone can no longer fully meet these performance requirements. Magnesium-based composite materials, due to their low density, high specific strength, high specific stiffness, good dimensional stability, and excellent casting properties, are among the most promising composite materials for use in today's high-tech fields.

[0003] For example, WO2021035776A1 discloses a method for preparing magnesium-based composite materials, which is carried out according to the following steps: (1) Prepare magnesium ingots as raw materials; prepare salt flux and reinforcement; (2) Place the salt flux in a crucible and heat it to make salt flux melt; add reinforcement; (3) Pour it into a crucible at room temperature and cool it to room temperature to obtain a precursor; (4) Preheat the iron crucible to a red-hot state, add the raw materials and melt at 953-1043K; (5) Put the precursor into the raw material melt, stir and then add refining agent at a temperature of 953-993K and stir to refine. After controlling the temperature, let it stand to form slag and melt; (6) After removing the slag, lower the temperature to 973-982K and cast.

[0004] CN104313423A discloses a method for manufacturing magnesium-based composite wall panel profiles, which aims to solve the problems of easy stalling during the extrusion process and high bending and torsion of the profiles in existing wall panel profile manufacturing. The manufacturing method includes: 1. Melting raw materials in a melting furnace; 2. Adding SiC particles; 3. Casting into magnesium-based composite flat ingots; 4. Cutting the flat ingots; 5. Removing oxide scale; 6. Performing homogenization annealing; 7. Extruding the annealed magnesium-based composite flat ingots; 8. Heating the magnesium-based composite wall panel profiles to 150℃-180℃ and then performing tension straightening; 9. Cutting off the head and tail ends.

[0005] However, current magnesium alloy materials still suffer from poor high-temperature resistance, low tensile strength, and low tensile modulus. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a method for preparing basalt fiber reinforced magnesium alloy materials, so as to solve the defects of poor high temperature resistance, low tensile strength and low tensile modulus of magnesium alloy materials in the prior art.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] This invention provides a method for preparing basalt fiber reinforced magnesium alloy material, the method comprising:

[0009] Basalt fibers are sequentially coarsened, sensitized, silver-plated, and nickel-plated to obtain modified basalt fibers; the thickness of the silver layer obtained by silver plating is 0.1-5 μm; the thickness of the nickel layer obtained by nickel plating is 0.025-0.1 mm.

[0010] The modified basalt fibers and magnesium powder were mixed and subjected to hot isostatic pressing to obtain basalt fiber reinforced magnesium alloy material.

[0011] The preparation method provided by this invention employs a specific processing procedure. By plating basalt fibers with silver and nickel and then performing hot isostatic pressing, the performance of the resulting basalt fiber reinforced magnesium alloy material is improved. This significantly enhances its high-temperature resistance, tensile strength, and tensile modulus, ensuring the performance of the basalt fiber reinforced magnesium alloy material in use.

[0012] As a preferred embodiment of the present invention, the length of the basalt fiber is ≤5mm.

[0013] Preferably, the diameter of the basalt fiber is 10-20 μm.

[0014] As a preferred technical solution of the present invention, the roughening treatment is to treat the basalt fibers with an alkaline solution.

[0015] Preferably, the alkaline solution includes sodium hydroxide solution and / or potassium hydroxide solution.

[0016] Preferably, the mass concentration of the alkaline solution is 65-75%.

[0017] As a preferred technical solution of the present invention, the roughening temperature is 80-90℃.

[0018] Preferably, the roughening time is 1-2 hours.

[0019] As a preferred technical solution of the present invention, the sensitization is performed by treating the basalt fibers obtained from the roughening treatment with a tin salt solution.

[0020] Preferably, the mass concentration of tin salt in the tin salt solution is 60-80 g / L.

[0021] Preferably, the mass concentration of hydrochloric acid in the tin salt solution is 4-5%.

[0022] As a preferred embodiment of the present invention, the sensitization treatment time is 30-60 minutes.

[0023] As a preferred technical solution of the present invention, the silver plating method includes chemical silver plating.

[0024] As a preferred technical solution of the present invention, the nickel plating method includes electroplating nickel.

[0025] As a preferred technical solution of the present invention, the mass ratio of the modified basalt fiber to magnesium powder is 1:(1-1.5).

[0026] As a preferred technical solution of the present invention, the operating temperature of the hot isostatic pressing is 400-500℃.

[0027] Preferably, the operating pressure of the hot isostatic pressing is 130-150 MPa.

[0028] Preferably, the heat preservation and pressure holding time for hot isostatic pressing is 2-2.5 hours.

[0029] Compared with existing technical solutions, the present invention has the following beneficial effects:

[0030] The solution provided by this invention first chemically plating silver onto the fiber, and then using the silver-coated fiber as an electrode for electroplating, so that the surface of the basalt fiber is covered with a metal element with stronger bonding force, increasing the fusion with magnesium, thereby improving the strength, wear resistance and other properties of basalt fiber reinforced magnesium alloy; the high temperature resistance can reach above 300℃, the tensile strength is ≥300MPa, and the tensile modulus is ≥3250MPa. Detailed Implementation

[0031] To better illustrate the present invention and facilitate understanding of its technical solutions, typical but non-limiting embodiments of the present invention are as follows:

[0032] This embodiment provides a method for preparing basalt fiber reinforced magnesium alloy material, the method comprising:

[0033] Basalt fibers were sequentially roughened, sensitized, silver-plated, and nickel-plated to obtain modified basalt fibers.

[0034] The modified basalt fibers and magnesium powder were mixed and subjected to hot isostatic pressing to obtain basalt fiber reinforced magnesium alloy material.

[0035] Specifically, the length of the basalt fiber is ≤5mm, for example, it can be 5mm, 4.5mm, 4mm, 3.5mm, 3mm, 2.5mm, 2mm, 1.5mm, 1mm or 0.5mm, etc., but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0036] Specifically, the diameter of the basalt fiber is 10-20 μm, for example, it can be 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm or 20 μm, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0037] Before coarsening, the basalt fibers are soaked in acetone solution for 1-2 hours to remove glue, followed by washing and drying for later use.

[0038] Specifically, the roughening treatment involves treating the basalt fibers with an alkaline solution.

[0039] Specifically, the alkaline solution includes sodium hydroxide solution and / or potassium hydroxide solution.

[0040] Specifically, the mass concentration of the alkaline solution is 65-75%, for example, it can be 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74% or 75%, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0041] Specifically, the roughening temperature is 80-90℃, for example, it can be 80℃, 82℃, 84℃, 86℃, 88℃ or 90℃, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0042] Specifically, the coarsening time is 1-2 hours, for example, it can be 1 hour, 1.2 hours, 1.4 hours, 1.6 hours, 1.8 hours or 2 hours, but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0043] Specifically, the sensitization involves treating the basalt fibers obtained from the roughening process with a tin salt solution;

[0044] Specifically, the mass concentration of tin salt in the tin salt solution is 60-80 g / L, for example, it can be 60 g / L, 62 g / L, 64 g / L, 66 g / L, 68 g / L, 70 g / L, 72 g / L, 74 g / L, 76 g / L, 78 g / L or 80 g / L, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0045] Specifically, the mass concentration of hydrochloric acid in the tin salt solution is 4-5%, for example, it can be 4%, 4.2%, 4.4%, 4.6%, 4.8% or 5%, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0046] In this invention, the tin salt solution includes tin salt and hydrochloric acid, which is an acidic solution of tin salt. The tin salt can be selected from commonly used tin salts in the art, such as stannous chloride.

[0047] Specifically, the sensitization treatment time is 30-60 minutes, for example, it can be 30 minutes, 35 minutes, 40 minutes, 45 minutes, 50 minutes, 55 minutes or 60 minutes, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0048] In this invention, the silver plating and nickel plating methods do not affect the performance of the resulting reinforced magnesium alloy material, but it is necessary to ensure that the thickness of the plating layer meets the limits of this invention in order to ensure the preparation of high-performance reinforced magnesium alloy material.

[0049] Specifically, the silver plating method includes chemical silver plating, or other methods in the art, such as sputtering, vapor deposition, electroplating, etc.

[0050] Specifically, the thickness of the silver layer obtained by silver plating is 0.1-5μm, for example, it can be 0.1μm, 0.2μm, 0.4μm, 0.6μm, 0.8μm, 1μm, 1.5μm, 2μm, 2.5μm, 3μm, 3.5μm, 4μm, 4.5μm or 4.5μm, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0051] For example, the chemical silver plating process is as follows: an oxidizing solution and a reducing solution are prepared, and then the sensitized basalt fibers are placed in a mixed solution of the oxidizing solution and the reducing solution for treatment.

[0052] The mass concentration of diamminesilver(I) nitrate in the oxidizing solution is 10-30%, for example, it can be 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28% or 30%, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0053] The mass concentration of sodium hydroxide in the oxidizing solution is 20-25 g / L, for example, it can be 20 g / L, 21 g / L, 22 g / L, 23 g / L, 24 g / L or 25 g / L, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0054] The glucose concentration in the reducing solution is 8-10 g / L, for example, it can be 8 g / L, 8.2 g / L, 8.4 g / L, 8.6 g / L, 8.8 g / L, 9 g / L, 9.2 g / L, 9.4 g / L, 9.6 g / L, 9.8 g / L or 10 g / L, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0055] The mass concentration of ethanol in the reducing solution is 20-30 g / L, for example, it can be 20 g / L, 22 g / L, 24 g / L, 26 g / L, 28 g / L or 30 g / L, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0056] The sodium thiosulfate in the reducing solution has a mass concentration of 15-20 g / L, such as 15 g / L, 16 g / L, 17 g / L, 18 g / L, 19 g / L or 20 g / L, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0057] The volume ratio of the oxidizing solution to the reducing solution in the mixed solution is (0.5-0.6):1, for example, it can be 0.5:1, 0.52:1, 0.54:1, 0.56:1, 0.58:1 or 0.6:1, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0058] The electroless silver plating time is 30-80 minutes, for example, it can be 30 minutes, 35 minutes, 40 minutes, 45 minutes, 50 minutes, 55 minutes, 60 minutes, 65 minutes, 70 minutes, 75 minutes or 80 minutes, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0059] Specifically, the nickel plating method includes electroplating, but can also be other methods in the art, such as sputtering, vapor deposition, electroless plating, etc.

[0060] Specifically, the thickness of the nickel layer obtained by nickel plating is 0.025-0.1 mm, for example, it can be 0.025 mm, 0.03 mm, 0.035 mm, 0.04 mm, 0.045 mm, 0.05 mm, 0.055 mm, 0.06 mm, 0.065 mm, 0.07 mm, 0.075 mm, 0.08 mm, 0.085 mm, 0.09 mm, 0.095 mm or 0.1 mm, but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0061] For example, the electroplating solution used in nickel plating includes: 180-230 g / L nickel sulfate, 50-60 g / L nickel chloride and 28-35 g / L boric acid.

[0062] In this invention, the concentration of nickel sulfate in the electroplating solution used for nickel plating is 180-230 g / L, for example, it can be 180 g / L, 190 g / L, 200 g / L, 210 g / L, 220 g / L or 230 g / L, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0063] In this invention, the concentration of nickel chloride in the electroplating solution used for nickel plating is 50-60 g / L, for example, it can be 50 g / L, 52 g / L, 54 g / L, 56 g / L, 58 g / L or 60 g / L, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0064] In this invention, the concentration of boric acid in the electroplating solution used for nickel electroplating is 28-35 g / L, for example, it can be 28 g / L, 29 g / L, 30 g / L, 31 g / L, 32 g / L, 33 g / L, 34 g / L or 35 g / L, etc., but is not limited to the listed values, and other unlisted values ​​within this range are also acceptable.

[0065] In this invention, the current density during nickel electroplating is 40-60 A / dm². 2 For example, it could be 40A / dm 2 42A / dm 2 44A / dm 2 46A / dm 2 48A / dm 2 50A / dm 2 52A / dm 2 54A / dm 2 56A / dm 2 58A / dm 2 Or 60A / dm 2 The values ​​may include, but are not limited to, the listed values; other unlisted values ​​within this range also meet the requirements.

[0066] In this invention, the electroplating temperature for nickel is 25-30°C, for example, it can be 25°C, 26°C, 27°C, 28°C, 29°C or 30°C, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0067] In this invention, the electroplating time for nickel is 10-30 minutes, for example, it can be 10 minutes, 15 minutes, 20 minutes, 25 minutes or 30 minutes, but it is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0068] Specifically, the mass ratio of the modified basalt fiber to magnesium powder is 1:(1-1.5), for example, it can be 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.4 or 1:1.5, but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0069] In this invention, the average particle size of the magnesium powder can be reasonably selected according to the art. For example, the average particle size of the magnesium powder in this invention is selected as 5-10μm, such as 5μm, 6μm, 7μm, 8μm, 9μm or 10μm, etc., but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0070] Specifically, the operating temperature of the hot isostatic pressing is 400-500℃, for example, it can be 400℃, 420℃, 440℃, 460℃, 480℃ or 500℃, etc., but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0071] Specifically, the operating pressure of the hot isostatic pressing is 130-150 MPa, for example, it can be 130 MPa, 132 MPa, 134 MPa, 136 MPa, 138 MPa, 140 MPa, 142 MPa, 144 MPa, 146 MPa, 148 MPa or 150 MPa, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0072] Specifically, the heat preservation and pressure holding time of the hot isostatic pressing is 2-2.5h, for example, it can be 2h, 2.1h, 2.2h, 2.3h, 2.4h or 2.5h, but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0073] Furthermore, to illustrate the superiority of the preparation method of basalt fiber reinforced magnesium alloy material provided by the present invention, the following specific embodiments are provided for description:

[0074] The silver plating process in the following embodiments is as follows:

[0075] An oxidizing solution and a reducing solution are prepared, and then the sensitized basalt fibers are placed in the mixed solution of the oxidizing solution and the reducing solution for treatment. The treatment time is selected according to the coating thickness.

[0076] The mass concentration of diamminesilver(I) nitrate in the oxidizing solution is 20%; the mass concentration of sodium hydroxide in the oxidizing solution is 22 g / L.

[0077] The reducing solution has a glucose concentration of 9 g / L; the reducing solution has an ethanol concentration of 25 g / L; and the reducing solution has a sodium thiosulfate concentration of 18 g / L.

[0078] The volume ratio of the oxidizing solution to the reducing solution in the mixed solution is 0.55:1;

[0079] The nickel plating process is carried out by electroplating, wherein the electroplating solution used in the nickel plating includes: 200 g / L nickel sulfate, 55 g / L nickel chloride, and 30 g / L boric acid; the current density in the nickel plating is 50 A / dm³. 2 The electroplating temperature for nickel is 30℃, and the electroplating time is selected according to the thickness of the coating.

[0080] Example 1

[0081] This embodiment provides a method for preparing basalt fiber reinforced magnesium alloy material, the method comprising:

[0082] Basalt fibers were sequentially roughened, sensitized, silver-plated, and nickel-plated to obtain modified basalt fibers.

[0083] The modified basalt fibers and magnesium powder were mixed and then subjected to hot isostatic pressing to obtain basalt fiber reinforced magnesium alloy material.

[0084] The basalt fiber has a length of 5 mm and a diameter of 15 μm.

[0085] The roughening treatment involves treating basalt fibers with an alkaline solution; the alkaline solution is sodium hydroxide; the mass concentration of the alkaline solution is 72%; the roughening temperature is 84℃; and the roughening time is 1.4 hours.

[0086] The sensitization process involves treating the roughened basalt fibers with a tin salt solution; the tin salt (stannous chloride) in the tin salt solution has a mass concentration of 70 g / L; the hydrochloric acid in the tin salt solution has a mass concentration of 4.3%; and the sensitization treatment time is 45 min.

[0087] The silver plating method is chemical silver plating; the thickness of the silver layer obtained by the silver plating is 2 μm.

[0088] The nickel plating method is electroplating; the thickness of the nickel layer obtained by the nickel plating is 0.05 mm;

[0089] The mass ratio of the modified basalt fiber to magnesium powder (average particle size of 7 μm) is 1:1; the operating temperature of the hot isostatic pressing is 450℃; the operating pressure of the hot isostatic pressing is 135 MPa; and the heat preservation and pressure holding time of the hot isostatic pressing is 2.4 h.

[0090] The properties of the obtained basalt fiber reinforced magnesium alloy are detailed in Table 1.

[0091] Example 2

[0092] This embodiment provides a method for preparing basalt fiber reinforced magnesium alloy material, the method comprising:

[0093] Basalt fibers were sequentially roughened, sensitized, silver-plated, and nickel-plated to obtain modified basalt fibers.

[0094] The modified basalt fibers and magnesium powder were mixed and then subjected to hot isostatic pressing to obtain basalt fiber reinforced magnesium alloy material.

[0095] The basalt fiber has a length of 4 mm and a diameter of 17 μm.

[0096] The roughening treatment involves treating basalt fibers with an alkaline solution; the alkaline solution is potassium hydroxide solution; the mass concentration of the alkaline solution is 68%; the roughening temperature is 86℃; and the roughening time is 1.5 hours.

[0097] The sensitization process involves treating the roughened basalt fibers with a tin salt solution; the tin salt (stannous chloride) in the tin salt solution has a mass concentration of 75 g / L; the hydrochloric acid in the tin salt solution has a mass concentration of 4.5%; and the sensitization treatment time is 40 min.

[0098] The silver plating method is chemical silver plating; the thickness of the silver layer obtained by the silver plating is 3μm.

[0099] The nickel plating method is electroplating; the thickness of the nickel layer obtained by the nickel plating is 0.08 mm;

[0100] The mass ratio of the modified basalt fiber to magnesium powder (average particle size of 8μm) is 1:1; the operating temperature of the hot isostatic pressing is 480℃; the operating pressure of the hot isostatic pressing is 140MPa; and the heat preservation and pressure holding time of the hot isostatic pressing is 2.2h.

[0101] The properties of the obtained basalt fiber reinforced magnesium alloy are detailed in Table 1.

[0102] Example 3

[0103] This embodiment provides a method for preparing basalt fiber reinforced magnesium alloy material, the method comprising:

[0104] Basalt fibers were sequentially roughened, sensitized, silver-plated, and nickel-plated to obtain modified basalt fibers.

[0105] The modified basalt fibers and magnesium powder were mixed and then subjected to hot isostatic pressing to obtain basalt fiber reinforced magnesium alloy material.

[0106] The basalt fiber has a length of 2 mm and a diameter of 10 μm.

[0107] The roughening treatment involves treating basalt fibers with an alkaline solution; the alkaline solution is potassium hydroxide solution; the mass concentration of the alkaline solution is 65%; the roughening temperature is 90℃; and the roughening time is 1 hour.

[0108] The sensitization process involves treating the roughened basalt fibers with a tin salt solution; the tin salt (stannous chloride) in the tin salt solution has a mass concentration of 80 g / L; the hydrochloric acid in the tin salt solution has a mass concentration of 4%; and the sensitization treatment time is 30 min.

[0109] The silver plating method is chemical silver plating; the thickness of the silver layer obtained by the silver plating is 5 μm.

[0110] The nickel plating method is electroplating; the thickness of the nickel layer obtained by the nickel plating is 0.1 mm;

[0111] The mass ratio of the modified basalt fiber to magnesium powder (average particle size of 5 μm) is 1:1.2; the operating temperature of the hot isostatic pressing is 500℃; the operating pressure of the hot isostatic pressing is 130 MPa; and the heat preservation and pressure holding time of the hot isostatic pressing is 2.5 h.

[0112] The properties of the obtained basalt fiber reinforced magnesium alloy are detailed in Table 1.

[0113] Example 4

[0114] This embodiment provides a method for preparing basalt fiber reinforced magnesium alloy material, the method comprising:

[0115] Basalt fibers were sequentially roughened, sensitized, silver-plated, and nickel-plated to obtain modified basalt fibers.

[0116] The modified basalt fibers and magnesium powder were mixed and then subjected to hot isostatic pressing to obtain basalt fiber reinforced magnesium alloy material.

[0117] The basalt fiber has a length of 5 mm and a diameter of 20 μm.

[0118] The roughening treatment involves treating basalt fibers with an alkaline solution; the alkaline solution is potassium hydroxide solution; the mass concentration of the alkaline solution is 75%; the roughening temperature is 80℃; and the roughening time is 2 hours.

[0119] The sensitization process involves treating the roughened basalt fibers with a tin salt solution; the tin salt (stannous chloride) in the tin salt solution has a mass concentration of 60 g / L; the hydrochloric acid in the tin salt solution has a mass concentration of 5%; and the sensitization treatment time is 60 min.

[0120] The silver plating method is chemical silver plating; the thickness of the silver layer obtained by the silver plating is 0.1 μm;

[0121] The nickel plating method is electroplating; the thickness of the nickel layer obtained by the nickel plating is 0.025 mm;

[0122] The mass ratio of the modified basalt fiber to magnesium powder (average particle size of 10 μm) is 1:1.5; the operating temperature of the hot isostatic pressing is 400℃; the operating pressure of the hot isostatic pressing is 150 MPa; and the heat preservation and pressure holding time of the hot isostatic pressing is 2 hours.

[0123] The properties of the obtained basalt fiber reinforced magnesium alloy are detailed in Table 1.

[0124] Comparative Example 1

[0125] The only difference from Example 1 is that silver plating is not performed. The properties of the resulting basalt fiber reinforced magnesium alloy material are detailed in Table 1.

[0126] Comparative Example 2

[0127] The only difference from Example 1 is that nickel plating is not performed. The properties of the resulting basalt fiber reinforced magnesium alloy are detailed in Table 1.

[0128] Comparative Example 3

[0129] The only difference from Example 1 is that the silver plating layer is replaced with a copper layer of equal thickness. The properties of the resulting basalt fiber reinforced magnesium alloy material are detailed in Table 1.

[0130] Comparative Example 4

[0131] The only difference from Example 1 is that the nickel plating layer is replaced with a copper layer of equal thickness. The properties of the resulting basalt fiber reinforced magnesium alloy material are detailed in Table 1.

[0132] Comparative Example 5

[0133] The only difference from Example 1 is that a 10-minute immersion in a silane coupling agent was used between sensitization and silver plating. The properties of the resulting basalt fiber reinforced magnesium alloy are detailed in Table 1.

[0134] In this invention, the tensile strength and tensile modulus properties of basalt fiber reinforced magnesium alloy materials are in accordance with the national standard GB / T1040; the high temperature resistance test method is as follows: take a sample with a size of 100mm×100mm, place it in a muffle furnace and set the temperature for 3h. If the sample does not soften or delaminate after being taken out, it is considered qualified.

[0135] Table 1

[0136] High temperature resistance Tensile strength tensile modulus Example 1 350℃ 350MPa 3750MPa Example 2 350℃ 330MPa 3400MPa Example 3 300℃ 300MPa 3250MPa Example 4 400℃ 430MPa 4200MPa Comparative Example 1 180℃ 280MPa 3210MPa Comparative Example 2 170℃ 340MPa 3620MPa Comparative Example 3 270℃ 275MPa 3200MPa Comparative Example 4 275℃ 280MPa 3170MPa Comparative Example 5 295℃ 320MPa 3650MPa

[0137] As can be seen from the results of the above embodiments and comparative examples, the preparation method provided by the present invention adopts a specific processing procedure. By plating basalt fibers with silver and nickel and then performing hot isostatic pressing, the performance of the obtained basalt fiber reinforced magnesium alloy material is improved. The high temperature resistance, specific strength and specific modulus are significantly improved, ensuring the performance of the basalt fiber reinforced magnesium alloy material.

[0138] The present invention is described in detail through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for the components used in the present invention, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0139] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0140] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0141] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A method for preparing basalt fiber reinforced magnesium alloy material, characterized in that, The preparation method includes: Basalt fibers are sequentially coarsened, sensitized, silver-plated, and nickel-plated to obtain modified basalt fibers; the thickness of the silver layer obtained by silver plating is 0.1-5 μm; the thickness of the nickel layer obtained by nickel plating is 0.025-0.1 mm. The modified basalt fibers and magnesium powder were mixed and subjected to hot isostatic pressing to obtain basalt fiber reinforced magnesium alloy material.

2. The method for preparing basalt fiber reinforced magnesium alloy material as described in claim 1, characterized in that, The length of the basalt fiber is ≤5mm; The diameter of the basalt fibers is 10-20 μm.

3. The method for preparing basalt fiber reinforced magnesium alloy material as described in claim 1 or 2, characterized in that, The roughening treatment involves treating the basalt fibers with an alkaline solution. The alkaline solution includes sodium hydroxide solution and / or potassium hydroxide alkaline solution; The mass concentration of the alkaline solution is 65-75%.

4. The method for preparing basalt fiber reinforced magnesium alloy material as described in claim 1, characterized in that, The roughening temperature is 80-90℃; The coarsening time is 1-2 hours.

5. The method for preparing basalt fiber reinforced magnesium alloy material as described in claim 1 or 4, characterized in that, The sensitization involves treating the basalt fibers obtained from the roughening process with a tin salt solution; the tin salt solution is an acidic solution of tin salt, comprising tin salt and hydrochloric acid; The tin salt solution has a tin salt concentration of 60-80 g / L. The mass concentration of hydrochloric acid in the tin salt solution is 4-5%.

6. The method for preparing basalt fiber reinforced magnesium alloy material as described in claim 1, characterized in that, The sensitization treatment time is 30-60 minutes.

7. The method for preparing basalt fiber reinforced magnesium alloy material as described in claim 1 or 6, characterized in that, The silver plating method includes chemical silver plating.

8. The method for preparing basalt fiber reinforced magnesium alloy material as described in claim 7, characterized in that, The nickel plating method includes electroplating.

9. The method for preparing basalt fiber reinforced magnesium alloy material as described in claim 1 or 8, characterized in that, The mass ratio of the modified basalt fiber to magnesium powder is 1:(1-1.5).

10. The method for preparing basalt fiber reinforced magnesium alloy material as described in claim 9, characterized in that, The operating temperature of the hot isostatic pressing is 400-500℃; The operating pressure for hot isostatic pressing is 130-150 MPa; The heat preservation and pressure holding time for hot isostatic pressing is 2-2.5 hours.