A high-strength metal connector material and preparation method thereof

Abstract

The present invention relates to the technical field of metal materials, specifically to a high-strength metal connector material and a preparation method thereof; the high-strength metal connector material is composed of the following raw materials by weight: 30 to 40 parts of tungsten powder, 3 to 6 parts of nickel powder, 1 to 2.5 parts of high entropy alloy powder, 1 to 3 parts of enhanced carbon nanospheres, 1 to 3 parts of silicon carbide powder and 1 to 4 parts of composite powder; tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder are put into a mixing device for mixing, and then the obtained mixture is cold isostatically pressed and then sintered to obtain a finished high-strength metal connector material. The high-strength metal connector material prepared by the present invention not only has good mechanical properties, but also has excellent corrosion resistance, which effectively guarantees its quality.

Description

Technical Field

[0001] The invention relates to the technical field of metal materials, and in particular to a high-strength metal connector material and a preparation method thereof. Background Art

[0002] With the rapid development of modern industry, such as aerospace, automobile manufacturing, mechanical equipment and other fields, the requirements for structural strength, stability and reliability are getting higher and higher. As the key element connecting various components, the performance of metal connectors directly affects the quality and safety of the entire structure. In the aerospace field, aircraft face extreme temperatures, pressures and complex mechanical environments. Metal connectors need to have high strength and good corrosion resistance to ensure flight safety and stability; in the automobile manufacturing industry, in order to improve the performance and fuel efficiency of automobiles, metal connectors are required to withstand the high power output of the engine and complex driving vibrations.

[0003] Traditional metal connector materials, such as ordinary carbon steel and low alloy steel, have certain strength and cost advantages, but they have gradually exposed many shortcomings in the face of increasingly stringent industrial needs. Ordinary carbon steel has relatively low strength and toughness, and is prone to deformation and fracture in high-strength application scenarios; although low alloy steel has improved in strength, its performance still cannot meet the requirements in some special environments.

[0004] Based on this, the present invention provides a high-strength metal connector material and a preparation method thereof to solve the above-mentioned technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a high-strength metal connector material and a preparation method thereof. The prepared high-strength metal connector material not only has good mechanical properties, but also has excellent corrosion resistance, effectively ensuring its quality.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The first aspect of the present invention provides a high-strength metal connector material, which is composed of the following raw materials in parts by weight: 30 to 40 parts of tungsten powder, 3 to 6 parts of nickel powder, 1 to 2.5 parts of high entropy alloy powder, 1 to 3 parts of reinforced carbon nanospheres, 1 to 3 parts of silicon carbide powder and 1 to 4 parts of composite powder.

[0008] The present invention is further configured as follows: the high entropy alloy powder is composed of the following raw materials in parts by weight: 10 to 20 parts of cobalt powder, 8 to 15 parts of chromium powder, 10 to 18 parts of iron powder, 8 to 12 parts of manganese powder and 3 to 7 parts of scandium powder;

[0009] The preparation process of the high entropy alloy powder is as follows:

[0010] Accurately weigh cobalt powder, chromium powder, iron powder, manganese powder and scandium powder and set aside;

[0011] Cobalt powder, chromium powder, iron powder, manganese powder and scandium powder are ball-milled in a planetary high-energy ball mill to obtain high entropy alloy powder.

[0012] The present invention is further configured as follows: the ball-to-material ratio of the ball mill is 8-10:1, the rotation speed of the ball mill is 200-300 r / min, and the ball milling time is 12-14 h.

[0013] The present invention is further configured as follows: the preparation process of the enhanced carbon nanospheres is as follows:

[0014] The hollow carbon nanospheres are placed in N,N-dimethylformamide at a dosage ratio of 0.01 to 0.06 g / mL and ultrasonically treated for 30 to 40 minutes, and 8.5 to 10.5% of the mass of the hollow carbon nanospheres is added thereto, and the ultrasonic treatment is continued for 100 to 120 minutes at 30 to 40° C.;

[0015] After completion, the obtained composite liquid is dripped with palladium nitrate solution at 500-600 r / min, and then ammonia water is added thereto until the pH value is 8-9, and the mixture is allowed to stand for 180-200 min;

[0016] The obtained precipitate is centrifuged at 8000-10000 r / min for 10-20 min, then washed with deionized water for 2-4 times, and finally placed at 60-80° C. and dried for 16-20 h to obtain enhanced carbon nanospheres.

[0017] The present invention is further configured as follows: the palladium nitrate solution is prepared by mixing palladium nitrate and water in a dosage ratio of 0.01 to 0.03 g / mL.

[0018] The present invention is further configured as follows: the dropwise addition amount of the palladium nitrate solution is 2.5-6.5% of the mass of the composite liquid, and the dropwise addition time is 40-60 minutes.

[0019] The present invention is further configured as follows: the particle size of the silicon carbide powder is 10 to 100 μm.

[0020] The present invention is further configured as follows: the composite powder is formed by mixing titanium powder and aluminum powder in a mass ratio of 0.5 to 0.6:1.

[0021] The second aspect of the present invention: also provides a method for preparing the above-mentioned high-strength metal connector material, comprising the following steps:

[0022] Step 1: Accurately weigh tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder, and put the tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder into a mixing equipment for mixing;

[0023] Step 2: After the mixture is evenly mixed, the mixture is cold isostatically pressed at 200-320 MPa for 50-60 minutes, and then sintered to obtain a high-strength metal connector material product.

[0024] The present invention is further configured as follows: the sintering temperature is 1500-1600° C. and the sintering time is 180-200 min.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] In the present invention, tungsten powder, nickel powder, high entropy alloy powder, reinforced carbon nanospheres, silicon carbide powder and composite powder are used as raw materials. Tungsten powder, nickel powder, high entropy alloy powder, reinforced carbon nanospheres, silicon carbide powder and composite powder are put into a mixing device for mixing, and then the obtained mixed material is cold isostatically pressed and then sintered to obtain a finished high-strength metal connector material. The high-strength metal connector material prepared by the present invention not only has good mechanical properties, but also has excellent corrosion resistance, which effectively guarantees its quality. The high-strength metal connector material and the preparation method thereof provided by the present invention have a broader market prospect and are more suitable for promotion. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0028] The present embodiment provides a high-strength metal connector material, which is composed of the following raw materials in parts by weight: 30 parts of tungsten powder, 3 parts of nickel powder, 1 part of high entropy alloy powder, 1 part of reinforced carbon nanospheres, 1 part of silicon carbide powder and 1 part of composite powder.

[0029] The high entropy alloy powder is composed of the following raw materials by weight: 10 parts of cobalt powder, 8 parts of chromium powder, 10 parts of iron powder, 8 parts of manganese powder and 3 parts of scandium powder;

[0030] In addition, this embodiment also provides a preparation process of a high entropy alloy powder as follows:

[0031] Accurately weigh cobalt powder, chromium powder, iron powder, manganese powder and scandium powder and set aside;

[0032] Cobalt powder, chromium powder, iron powder, manganese powder and scandium powder are ball-milled in a planetary high-energy ball mill to obtain high entropy alloy powder.

[0033] Furthermore, the ball-to-material ratio of the ball mill is 10:1, the rotation speed of the ball mill is 200 r / min, and the ball milling time is 12 h.

[0034] Among them, the preparation process of enhanced carbon nanospheres is as follows:

[0035] The hollow carbon nanospheres were placed in N,N-dimethylformamide at a dosage ratio of 0.01 g / mL and ultrasonically treated for 30 min, and graphene oxide with a mass ratio of 8.5% of the mass of the hollow carbon nanospheres was added thereto, and the ultrasonic treatment was continued for 100 min at 30°C;

[0036] After completion, the obtained composite liquid was dripped with palladium nitrate solution at 500 r / min, and then ammonia water was added to it until the pH value was 8, and then allowed to stand for 180 minutes;

[0037] The obtained precipitate was centrifuged at 8000 r / min for 10 min, then washed twice with deionized water, and finally placed at 60° C. and dried for 16 h to obtain enhanced carbon nanospheres.

[0038] Furthermore, the palladium nitrate solution is prepared by mixing palladium nitrate and water in a dosage ratio of 0.01 g / mL.

[0039] The amount of palladium nitrate solution added was 2.5% of the mass of the composite solution, and the addition time was 40 minutes.

[0040] In this embodiment, it should be noted that the hollow carbon nanospheres were purchased from Nanjing Jike Biotechnology Co., Ltd., and the graphene oxide was purchased from Qingdao Yanhai Carbon Materials Co., Ltd.

[0041] The particle size of the silicon carbide powder is 10 μm.

[0042] The composite powder is formed by mixing titanium powder and aluminum powder in a mass ratio of 0.5:1.

[0043] In addition, this embodiment also provides a method for preparing the above-mentioned high-strength metal connector material, comprising the following steps:

[0044] Step 1: Accurately weigh tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder, and put the tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder into a mixing equipment for mixing;

[0045] Step 2: After the mixture is evenly mixed, the mixture is cold isostatically pressed at 200 MPa for 50 minutes, and then sintered to obtain a high-strength metal connector material product, wherein the sintering temperature is 1500° C. and the sintering time is 180 minutes. Example 2

[0046] The present embodiment provides a high-strength metal connector material, which is composed of the following raw materials in parts by weight: 32 parts of tungsten powder, 4 parts of nickel powder, 1.5 parts of high entropy alloy powder, 2 parts of reinforced carbon nanospheres, 12 parts of silicon carbide powder and 2 parts of composite powder.

[0047] The high entropy alloy powder is composed of the following raw materials by weight: 11 parts of cobalt powder, 9 parts of chromium powder, 11 parts of iron powder, 9 parts of manganese powder and 4 parts of scandium powder;

[0048] In addition, this embodiment also provides a preparation process of a high entropy alloy powder as follows:

[0049] Accurately weigh cobalt powder, chromium powder, iron powder, manganese powder and scandium powder and set aside;

[0050] Cobalt powder, chromium powder, iron powder, manganese powder and scandium powder are ball-milled in a planetary high-energy ball mill to obtain high entropy alloy powder.

[0051] Furthermore, the ball-to-material ratio of the ball mill is 9:1, the rotation speed of the ball mill is 210 r / min, and the ball milling time is 13 h.

[0052] Among them, the preparation process of enhanced carbon nanospheres is as follows:

[0053] The hollow carbon nanospheres were placed in N,N-dimethylformamide at a dosage of 0.02 g / mL and ultrasonically treated for 32 min, and graphene oxide with a mass percentage of 8.7% of the hollow carbon nanospheres was added thereto, and the ultrasonic treatment was continued for 105 min at 32°C;

[0054] After completion, the obtained composite liquid was dripped with palladium nitrate solution at 510 r / min, and then ammonia water was added to it until the pH value was 8, and then allowed to stand for 185 min;

[0055] The obtained precipitate was centrifuged at 8500 r / min for 11 min, then washed with deionized water for 3 times, and finally dried at 62° C. for 17 h to obtain enhanced carbon nanospheres.

[0056] Furthermore, the palladium nitrate solution is prepared by mixing palladium nitrate and water in a dosage ratio of 0.02 g / mL.

[0057] The amount of palladium nitrate solution added was 3.5% of the mass of the composite solution, and the addition time was 45 minutes.

[0058] In this embodiment, it should be noted that the hollow carbon nanospheres were purchased from Nanjing Jike Biotechnology Co., Ltd., and the graphene oxide was purchased from Qingdao Yanhai Carbon Materials Co., Ltd.

[0059] The particle size of the silicon carbide powder is 20 μm.

[0060] The composite powder is formed by mixing titanium powder and aluminum powder in a mass ratio of 0.5:1.

[0061] In addition, this embodiment also provides a method for preparing the above-mentioned high-strength metal connector material, comprising the following steps:

[0062] Step 1: Accurately weigh tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder, and put the tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder into a mixing equipment for mixing;

[0063] Step 2: After the mixture is evenly mixed, the mixture is cold isostatically pressed for 20 minutes at 210 MPa, and then sintered to obtain a high-strength metal connector material product, wherein the sintering temperature is 1510° C. and the time is 185 minutes. Example 3

[0064] The preparation method of the high-strength metal connector material provided in this embodiment is basically the same as that in Embodiment 1, except that: the specific raw material composition and the specific preparation method of the high-strength metal connector material in this embodiment are different; the specific raw material composition and the specific preparation method of the high-strength metal connector material in this embodiment are as follows:

[0065] A high-strength metal connector material is composed of the following raw materials in parts by weight: 35 parts of tungsten powder, 4 parts of nickel powder, 2 parts of high-entropy alloy powder, 2 parts of reinforced carbon nanospheres, 2 parts of silicon carbide powder and 3 parts of composite powder.

[0066] The high entropy alloy powder is composed of the following raw materials by weight: 15 parts of cobalt powder, 11 parts of chromium powder, 14 parts of iron powder, 10 parts of manganese powder and 5 parts of scandium powder;

[0067] In addition, this embodiment also provides a preparation process of a high entropy alloy powder as follows:

[0068] Accurately weigh cobalt powder, chromium powder, iron powder, manganese powder and scandium powder and set aside;

[0069] Cobalt powder, chromium powder, iron powder, manganese powder and scandium powder are ball-milled in a planetary high-energy ball mill to obtain high entropy alloy powder.

[0070] Furthermore, the ball-to-material ratio of the ball mill is 8:1, the rotation speed of the ball mill is 250 r / min, and the ball milling time is 13 h.

[0071] Among them, the preparation process of enhanced carbon nanospheres is as follows:

[0072] The hollow carbon nanospheres were placed in N,N-dimethylformamide at a dosage ratio of 0.04 g / mL and ultrasonically treated for 35 min, and graphene oxide with a weight percentage of 9.5% of the weight of the hollow carbon nanospheres was added thereto, and the ultrasonic treatment was continued for 110 min at 35°C;

[0073] After completion, the obtained composite liquid was dripped with palladium nitrate solution at 550 r / min, and then ammonia water was added to it until the pH value was 9, and then it was left to stand for 190 min.

[0074] The obtained precipitate was centrifuged at 9000 r / min for 15 min, then washed with deionized water for 3 times, and finally dried at 70° C. for 18 h to obtain enhanced carbon nanospheres.

[0075] Furthermore, the palladium nitrate solution is prepared by mixing palladium nitrate and water in a dosage ratio of 0.02 g / mL.

[0076] The amount of palladium nitrate solution added was 4.5% of the mass of the composite solution, and the addition time was 50 minutes.

[0077] In this embodiment, it should be noted that the hollow carbon nanospheres were purchased from Nanjing Jike Biotechnology Co., Ltd., and the graphene oxide was purchased from Qingdao Yanhai Carbon Materials Co., Ltd.

[0078] The particle size of the silicon carbide powder is 50 μm.

[0079] The composite powder is formed by mixing titanium powder and aluminum powder in a mass ratio of 0.6:1.

[0080] In addition, this embodiment also provides a method for preparing the above-mentioned high-strength metal connector material, comprising the following steps:

[0081] Step 1: Accurately weigh tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder, and put the tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder into a mixing equipment for mixing;

[0082] Step 2: After the mixture is evenly mixed, the mixture is cold isostatically pressed at 260 MPa for 55 minutes, and then sintered to obtain a high-strength metal connector material product, wherein the sintering temperature is 1550° C. and the time is 190 minutes. Example 4

[0083] The preparation method of the high-strength metal connector material provided in this embodiment is basically the same as that in Embodiment 1, except that: the specific raw material composition and the specific preparation method of the high-strength metal connector material in this embodiment are different; the specific raw material composition and the specific preparation method of the high-strength metal connector material in this embodiment are as follows:

[0084] A high-strength metal connector material is composed of the following raw materials in parts by weight: 38 parts of tungsten powder, 5 parts of nickel powder, 2 parts of high-entropy alloy powder, 2 parts of reinforced carbon nanospheres, 2 parts of silicon carbide powder and 3 parts of composite powder.

[0085] The high entropy alloy powder is composed of the following raw materials by weight: 18 parts of cobalt powder, 14 parts of chromium powder, 17 parts of iron powder, 11 parts of manganese powder and 6 parts of scandium powder;

[0086] In addition, this embodiment also provides a preparation process of a high entropy alloy powder as follows:

[0087] Accurately weigh cobalt powder, chromium powder, iron powder, manganese powder and scandium powder and set aside;

[0088] Cobalt powder, chromium powder, iron powder, manganese powder and scandium powder are ball-milled in a planetary high-energy ball mill to obtain high entropy alloy powder.

[0089] Furthermore, the ball-to-material ratio of the ball mill is 10:1, the rotation speed of the ball mill is 280 r / min, and the ball milling time is 13 h.

[0090] Among them, the preparation process of enhanced carbon nanospheres is as follows:

[0091] The hollow carbon nanospheres were placed in N,N-dimethylformamide at a dosage of 0.05 g / mL and ultrasonically treated for 38 min, and graphene oxide with a weight percentage of 9.5% of the weight of the hollow carbon nanospheres was added thereto, and the ultrasonic treatment was continued for 115 min at 38° C.;

[0092] After completion, the obtained composite liquid was dripped with palladium nitrate solution at 590 r / min, and then ammonia water was added to it until the pH value was 9, and then allowed to stand for 195 min;

[0093] The obtained precipitate was centrifuged at 9500 r / min for 18 min, then washed with deionized water for 3 times, and finally dried at 78° C. for 19 h to obtain enhanced carbon nanospheres.

[0094] Furthermore, the palladium nitrate solution is prepared by mixing palladium nitrate and water in a dosage ratio of 0.03 g / mL.

[0095] The amount of palladium nitrate solution added was 5.5% of the mass of the composite solution, and the addition time was 55 minutes.

[0096] In this embodiment, it should be noted that the hollow carbon nanospheres were purchased from Nanjing Jike Biotechnology Co., Ltd., and the graphene oxide was purchased from Qingdao Yanhai Carbon Materials Co., Ltd.

[0097] The particle size of the silicon carbide powder is 90 μm.

[0098] The composite powder is formed by mixing titanium powder and aluminum powder in a mass ratio of 0.6:1.

[0099] In addition, this embodiment also provides a method for preparing the above-mentioned high-strength metal connector material, comprising the following steps:

[0100] Step 1: Accurately weigh tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder, and put the tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder into a mixing equipment for mixing;

[0101] Step 2: After the mixture is evenly mixed, the mixture is cold isostatically pressed at 300 MPa for 57 minutes, and then sintered to obtain a high-strength metal connector material product, wherein the sintering temperature is 1555° C. and the time is 195 minutes. Example 5

[0102] The preparation method of the high-strength metal connector material provided in this embodiment is basically the same as that in Embodiment 1, except that: the specific raw material composition and the specific preparation method of the high-strength metal connector material in this embodiment are different; the specific raw material composition and the specific preparation method of the high-strength metal connector material in this embodiment are as follows:

[0103] A high-strength metal connector material is composed of the following raw materials in parts by weight: 40 parts of tungsten powder, 6 parts of nickel powder, 2.5 parts of high-entropy alloy powder, 3 parts of reinforced carbon nanospheres, 3 parts of silicon carbide powder and 4 parts of composite powder.

[0104] The high entropy alloy powder is composed of the following raw materials by weight: 20 parts of cobalt powder, 15 parts of chromium powder, 18 parts of iron powder, 12 parts of manganese powder and 7 parts of scandium powder;

[0105] In addition, this embodiment also provides a preparation process of a high entropy alloy powder as follows:

[0106] Accurately weigh cobalt powder, chromium powder, iron powder, manganese powder and scandium powder and set aside;

[0107] Cobalt powder, chromium powder, iron powder, manganese powder and scandium powder are ball-milled in a planetary high-energy ball mill to obtain high entropy alloy powder.

[0108] Furthermore, the ball-to-material ratio of the ball mill is 8:1, the rotation speed of the ball mill is 300 r / min, and the ball milling time is 14 h.

[0109] Among them, the preparation process of enhanced carbon nanospheres is as follows:

[0110] The hollow carbon nanospheres were placed in N,N-dimethylformamide at a dosage ratio of 0.06 g / mL and ultrasonically treated for 40 min, and graphene oxide with a weight ratio of 10.5% of the weight of the hollow carbon nanospheres was added thereto, and the ultrasonic treatment was continued for 120 min at 40°C;

[0111] After completion, the obtained composite liquid was dripped with palladium nitrate solution at 600 r / min, and then ammonia water was added to it until the pH value was 9, and then it was left to stand for 200 min;

[0112] The obtained precipitate was centrifuged at 10000 r / min for 20 min, then washed with deionized water for 4 times, and finally dried at 80° C. for 20 h to obtain enhanced carbon nanospheres.

[0113] Furthermore, the palladium nitrate solution is prepared by mixing palladium nitrate and water in a dosage ratio of 0.03 g / mL.

[0114] The amount of palladium nitrate solution added was 6.5% of the mass of the composite solution, and the addition time was 60 minutes.

[0115] In this embodiment, it should be noted that the hollow carbon nanospheres were purchased from Nanjing Jike Biotechnology Co., Ltd., and the graphene oxide was purchased from Qingdao Yanhai Carbon Materials Co., Ltd.

[0116] The particle size of the silicon carbide powder is 100 μm.

[0117] The composite powder is formed by mixing titanium powder and aluminum powder in a mass ratio of 0.6:1.

[0118] In addition, this embodiment also provides a method for preparing the above-mentioned high-strength metal connector material, comprising the following steps:

[0119] Step 1: Accurately weigh tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder, and put the tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder into a mixing equipment for mixing;

[0120] Step 2: After the mixture is evenly mixed, the mixture is cold isostatically pressed at 320 MPa for 60 minutes, and then sintered to obtain a high-strength metal connector material product, wherein the sintering temperature is 1600° C. and the time is 200 minutes. Comparative Example 1

[0121] The difference from Example 1 is that this example does not contain high entropy alloy powder. Comparative Example 2

[0122] The difference from Example 1 is that the high entropy alloy powder in this example is composed of the following raw materials in parts by weight: 20 parts of cobalt powder, 18 parts of iron powder and 12 parts of manganese powder. Comparative Example 3

[0123] The difference from Example 1 is that in this example, an equal amount of hollow carbon nanospheres are used instead of reinforced carbon nanospheres. Comparative Example 4

[0124] The difference from Example 1 is that the composite powder in this example is composed of titanium powder and aluminum powder in a ratio of 0.4:1. Comparative Example 5

[0125] The difference from Example 1 is that the composite powder in this example is composed of titanium powder and aluminum powder in a ratio of 0.7:1.

[0126] Performance test: The high-strength metal connector material samples provided in Examples 1 to 5 and Comparative Examples 1 to 5 are marked as Examples 1 to 5 and Comparative Examples 1 to 5, respectively; and the relevant properties of the high-strength metal connector materials provided in Examples 1 to 5 and Comparative Examples 1 to 5 are tested as follows:

[0127] 1. Mechanical test: The test method is to use WDW-50 electronic universal testing machine to test tensile strength and elongation. 2. Corrosion resistance test: The test method is to use room temperature (25℃) immersion corrosion test, the corrosive medium is 3.5wt% NaCl solution; the corrosion sample is a disc-shaped alloy sample with a size of Φ15mm×3mm; the corrosion time is 24h. The weight loss of the alloy sample before and after corrosion is measured, and the annual corrosion rate of the alloy sample (unit: mm / a) is calculated based on the surface area of ​​the alloy sample.

[0128] The obtained test data are recorded in Table 1 and Table 2 below:

[0129] Table 1 Mechanical properties test results of each group of high-strength metal connector materials

[0130]

[0131] Table 2 Corrosion resistance test results of each group of high-strength metal connector materials

[0132]

[0133] By comparing and analyzing the relevant data in Table 1 and Table 2, it can be seen that the high-strength metal connector material prepared by the present invention not only has good mechanical properties, but also has excellent corrosion resistance, effectively ensuring its quality. This shows that the high-strength metal connector material and the preparation method thereof provided by the present invention have a broader market prospect and are more suitable for promotion.

[0134] In the present invention, tungsten powder, nickel powder, high entropy alloy powder, reinforced carbon nanospheres, silicon carbide powder and composite powder are used as raw materials, tungsten powder, nickel powder, high entropy alloy powder, reinforced carbon nanospheres, silicon carbide powder and composite powder are put into a mixing device for mixing, and then the obtained mixed material is cold isostatically pressed and then sintered to obtain a high-strength metal connector material finished product. The high-strength metal connector material prepared by the present invention not only has good mechanical properties, but also has excellent corrosion resistance, which effectively guarantees its quality.

[0135] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0136] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-strength metal connector material, characterized in that: The invention is composed of the following raw materials in parts by weight: 30 to 40 parts of tungsten powder, 3 to 6 parts of nickel powder, 1 to 2.5 parts of high entropy alloy powder, 1 to 3 parts of reinforced carbon nanospheres, 1 to 3 parts of silicon carbide powder and 1 to 4 parts of composite powder; The high entropy alloy powder is composed of the following raw materials in parts by weight: 10 to 20 parts of cobalt powder, 8 to 15 parts of chromium powder, 10 to 18 parts of iron powder, 8 to 12 parts of manganese powder and 3 to 7 parts of scandium powder; The preparation process of the enhanced carbon nanospheres is as follows: The hollow carbon nanospheres are placed in N,N-dimethylformamide at a dosage ratio of 0.01 to 0.06 g / mL and ultrasonically treated for 30 to 40 minutes, and 8.5 to 10.5% of the mass of the hollow carbon nanospheres is added thereto, and the ultrasonic treatment is continued for 100 to 120 minutes at 30 to 40° C.; After completion, the obtained composite liquid is dripped with palladium nitrate solution at 500-600 r / min, and then ammonia water is added thereto until the pH value is 8-9, and the mixture is allowed to stand for 180-200 min; The obtained precipitate is centrifuged at 8000-10000 r / min for 10-20 min, then washed with deionized water for 2-4 times, and finally placed at 60-80° C. and dried for 16-20 h to obtain enhanced carbon nanospheres; The composite powder is formed by mixing titanium powder and aluminum powder in a mass ratio of 0.5 to 0.6:

1.

2. A high-strength metal connector material according to claim 1, characterized in that: The preparation process of the high entropy alloy powder is as follows: Accurately weigh cobalt powder, chromium powder, iron powder, manganese powder and scandium powder and set aside; Cobalt powder, chromium powder, iron powder, manganese powder and scandium powder are ball-milled in a planetary high-energy ball mill to obtain high entropy alloy powder.

3. A high-strength metal connector material according to claim 2, characterized in that: The ball-to-material ratio of the ball mill is 8-10:1, the rotation speed of the ball mill is 200-300 r / min, and the ball milling time is 12-14 hours.

4. A high-strength metal connector material according to claim 1, characterized in that: The palladium nitrate solution is prepared by mixing palladium nitrate and water in a dosage ratio of 0.01 to 0.03 g / mL.

5. The high-strength metal connector material according to claim 1, characterized in that: The amount of the palladium nitrate solution added is 2.5-6.5% of the mass of the composite liquid, and the adding time is 40-60 minutes.

6. A high-strength metal connector material according to claim 1, characterized in that: The particle size of the silicon carbide powder is 10 to 100 μm.

7. A method for preparing a high-strength metal connector material according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Accurately weigh tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder, and put the tungsten powder, nickel powder, high entropy alloy powder, enhanced carbon nanospheres, silicon carbide powder and composite powder into a mixing equipment for mixing; Step 2: After the mixture is evenly mixed, the mixture is cold isostatically pressed at 200-320 MPa for 50-60 minutes, and then sintered to obtain a high-strength metal connector material product.

8. The method for preparing a high-strength metal connector material according to claim 7, characterized in that: The sintering temperature is 1500-1600° C. and the sintering time is 180-200 minutes.

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