Metal powder alloy material and preparation method thereof

Abstract

The invention relates to the technical field of metal alloy materials, in particular to a metal powder alloy material and a preparation method thereof, and the preparation method comprises the following steps: weighing the following raw materials in parts by weight: 25-30 parts of aluminum powder, 5-7 parts of modified carbon nanotube agent, 4-7 parts of nickel powder, 3-5 parts of manganese powder, 3-5 parts of zirconium powder, 2-4 parts of iron powder, 1-3 parts of copper powder and 3-5 parts of sintering aid. In the raw materials, the aluminum powder serves as a matrix and is matched with alloy elements such as the nickel powder and the manganese powder, a stable intermetallic compound and a solid solution structure can be formed, grains are further refined by adding the zirconium powder, internal defects are reduced, after hot press molding and sintering, the material density is remarkably improved, the problem that high strength and high extension of traditional metal are difficult to consider at the same time is solved, and the service life of the material is prolonged. And the composite material can adapt to scenes with high requirements on comprehensive mechanical properties, such as mechanical structural parts and wear-resistant parts.

Description

Technical Field

[0001] This invention relates to the field of metal alloy materials technology, specifically to a metal powder alloy material and its preparation method. Background Technology

[0002] In modern industry, the performance requirements for metallic materials are increasing, especially in terms of high strength, high elongation, fatigue resistance, and corrosion resistance. Traditional metallic materials often cannot meet these complex performance requirements at the same time, which limits the efficiency of material use. Based on this, the present invention further improves them. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the purpose of this invention is to provide a metal powder alloy material and its preparation method to solve the problems mentioned in the background art.

[0004] The present invention solves the technical problem by adopting the following technical solution:

[0005] This invention provides a method for preparing metal powder alloy materials, comprising the following steps:

[0006] Step 1: Weigh the raw materials according to the following weight parts: 25-30 parts aluminum powder, 5-7 parts modified carbon nanotube agent, 4-7 parts nickel powder, 3-5 parts manganese powder, 3-5 parts zirconium powder, 2-4 parts iron powder, 1-3 parts copper powder, and 3-5 parts sintering aid.

[0007] Step 2: The raw material from Step 1 is hot-pressed into shape and then sintered. After the process is completed, the metal powder alloy material of the present invention is obtained.

[0008] Preferably, the hot pressing pressure is 15-25 MPa, and the pressing time is 1 hour; the sintering temperature for the sintering treatment is 450-500℃, and the sintering time is 1 hour.

[0009] Preferably, the modified carbon nanotube agent is prepared by:

[0010] S01: Preheat carbon nanotubes at 55-60℃ for 1 hour to obtain preheated carbon nanotubes. Add the preheated carbon nanotubes to a modification liquid of 5-8 times the total amount of carbon nanotubes and stir to modify the mixture. After stirring, the modified carbon nanotube liquid is obtained.

[0011] S02: Immerse titanium oxide in yttrium gel solution with 3-5 times the total amount of titanium oxide until fully immersed, then filter and dry to obtain titanium oxide agent; mix 3-5 parts of nano chromium powder, 2-3 parts of titanium oxide agent and 1-2 parts of nano alumina evenly to obtain additive;

[0012] S03: Modified carbon nanotube liquid and additives are ball-milled at a weight ratio of 7:(3-5). After ball milling, the mixture is filtered and dried to obtain modified carbon nanotube agent.

[0013] Preferably, the yttrium sol is prepared by thoroughly mixing nano-silica sol and yttrium nitrate solution at a weight ratio of 3:5.

[0014] Preferably, the stirring speed for the stirring modification treatment is 350-400 r / min, and the stirring time is 1 h; the ball milling speed for the ball milling treatment is 1050-1150 r / min, and the ball milling time is 2 h.

[0015] Preferably, the modified liquid is prepared by:

[0016] S01a: Boron powder, sodium dodecylbenzenesulfonate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of (4-7):(11-15):3 to obtain boron solution;

[0017] S102: Add 1-3 parts of nano-silica and 2-3 parts of lanthanum oxide to 6-10 parts of dopamine hydrochloride solution and stir thoroughly. Finally, add 2-4 parts of boron solution and stir thoroughly to obtain the modified solution.

[0018] Preferably, the sodium dodecylbenzenesulfonate solution has a mass fraction of 12-15%; and the dopamine hydrochloride solution has a mass fraction of 3-5%.

[0019] Preferably, the sintering aid is prepared by mixing 2-3 parts of bismuth oxide, 1-3 parts of calcium fluoride and 2-3 parts of magnesium oxide evenly to obtain the sintering aid.

[0020] The present invention also provides a method for preparing metal powder alloy materials.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] In this invention, aluminum powder serves as the matrix, and when combined with alloying elements such as nickel powder and manganese powder, it forms a stable intermetallic compound and solid solution structure. The addition of zirconium powder further refines the grains and reduces internal defects. After hot pressing and sintering, the material density is significantly improved, solving the pain point of traditional metals where "high strength and high elongation are difficult to achieve simultaneously." This invention is suitable for applications requiring high comprehensive mechanical properties, such as mechanical structural parts and wear-resistant components.

[0023] The introduction of modified carbon nanotube agents is the core innovation: after treatment with a modifying liquid (containing boron powder, nano-silica, lanthanum oxide, etc.), the surface activity of carbon nanotubes is enhanced, allowing them to be uniformly dispersed in the alloy matrix to form a "fiber-reinforced" structure. This effectively inhibits the initiation and propagation of fatigue cracks, thus improving the fatigue life of the material. The nano-chromium powder, titanium dioxide (yttrium-doped and modified), and nano-alumina in the modified carbon nanotube agents can form a dense oxide protective film on the material surface. At the same time, the trace addition of copper and iron powders can adjust the matrix potential and reduce the electrochemical corrosion rate. The sintering aids (a compound of bismuth oxide, calcium fluoride, and magnesium oxide) can lower the sintering temperature (450-500℃, which is 100-150℃ lower than the traditional aluminum alloy sintering temperature), shorten the sintering time, and reduce abnormal grain growth during the sintering process, thereby reducing energy consumption while ensuring the consistency of material performance.

[0024] The preparation process of modified carbon nanotube agents (preheating - treatment of modified liquid - ball milling with additives) achieves multiple integrated functions: the modification of titanium dioxide by yttrium sol (nano silica sol + yttrium nitrate) can enhance its interfacial bonding with carbon nanotubes and alloy matrices; the synergistic effect of boron liquid (boron powder + sodium dodecylbenzenesulfonate + silane coupling agent KH550) and dopamine hydrochloride can not only improve the dispersibility of carbon nanotubes, but also introduce antioxidant and anti-corrosion components, so that a single modifier can simultaneously achieve the triple functions of "enhancement, fatigue resistance and corrosion resistance", simplifying the raw material system while improving the performance superposition effect. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This embodiment provides a method for preparing a metal powder alloy material, comprising the following steps:

[0027] Step 1: Weigh the raw materials according to the following weight parts: 25-30 parts aluminum powder, 5-7 parts modified carbon nanotube agent, 4-7 parts nickel powder, 3-5 parts manganese powder, 3-5 parts zirconium powder, 2-4 parts iron powder, 1-3 parts copper powder, and 3-5 parts sintering aid.

[0028] Step 2: The raw material from Step 1 is hot-pressed into shape and then sintered. After the process is completed, the metal powder alloy material of the present invention is obtained.

[0029] In this embodiment, the hot pressing pressure is 15-25 MPa, and the pressing time is 1 hour; the sintering temperature for the sintering treatment is 450-500℃, and the sintering time is 1 hour.

[0030] The preparation method of the modified carbon nanotube agent in this embodiment is as follows:

[0031] S01: Preheat carbon nanotubes at 55-60℃ for 1 hour to obtain preheated carbon nanotubes. Add the preheated carbon nanotubes to a modification liquid of 5-8 times the total amount of carbon nanotubes and stir to modify the mixture. After stirring, the modified carbon nanotube liquid is obtained.

[0032] S02: Immerse titanium oxide in yttrium gel solution with 3-5 times the total amount of titanium oxide until fully immersed, then filter and dry to obtain titanium oxide agent; mix 3-5 parts of nano chromium powder, 2-3 parts of titanium oxide agent and 1-2 parts of nano alumina evenly to obtain additive;

[0033] S03: Modified carbon nanotube liquid and additives are ball-milled at a weight ratio of 7:(3-5). After ball milling, the mixture is filtered and dried to obtain modified carbon nanotube agent.

[0034] In this embodiment, the yttrium sol solution is obtained by thoroughly mixing nano-silica sol and yttrium nitrate solution at a weight ratio of 3:5.

[0035] In this embodiment, the stirring speed for the stirring modification treatment is 350-400 r / min, and the stirring time is 1 h; the ball milling treatment is performed at a speed of 1050-1150 r / min for 2 h.

[0036] The preparation method of the modified liquid in this embodiment is as follows:

[0037] S01a: Boron powder, sodium dodecylbenzenesulfonate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of (4-7):(11-15):3 to obtain boron solution;

[0038] S102: Add 1-3 parts of nano-silica and 2-3 parts of lanthanum oxide to 6-10 parts of dopamine hydrochloride solution and stir thoroughly. Finally, add 2-4 parts of boron solution and stir thoroughly to obtain the modified solution.

[0039] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 12-15%; the dopamine hydrochloride solution has a mass fraction of 3-5%.

[0040] The preparation method of the sintering aid in this embodiment is as follows: 2-3 parts of bismuth oxide, 1-3 parts of calcium fluoride and 2-3 parts of magnesium oxide are mixed evenly to obtain the sintering aid.

[0041] This embodiment describes a method for preparing metal powder alloy materials.

[0042] Example 1.

[0043] This embodiment provides a method for preparing a metal powder alloy material, comprising the following steps:

[0044] Step 1: Weigh the raw materials according to the following weight proportions: 25 parts aluminum powder, 5 parts modified carbon nanotube agent, 4 parts nickel powder, 3 parts manganese powder, 3 parts zirconium powder, 2 parts iron powder, 1 part copper powder, and 3 parts sintering aid.

[0045] Step 2: The raw material from Step 1 is hot-pressed into shape and then sintered. After the process is completed, the metal powder alloy material of the present invention is obtained.

[0046] In this embodiment, the hot pressing pressure is 15 MPa, and the pressing time is 1 hour; the sintering temperature for the sintering treatment is 450°C, and the sintering time is 1 hour.

[0047] The preparation method of the modified carbon nanotube agent in this embodiment is as follows:

[0048] S01: Preheat carbon nanotubes at 55°C for 1 hour to obtain preheated carbon nanotubes. Add the preheated carbon nanotubes to a modification liquid with a volume of 5 times the total volume of carbon nanotubes and stir to modify the mixture. After stirring, the modified carbon nanotube liquid is obtained.

[0049] S02: Immerse titanium oxide in yttrium colloid solution with a volume of 3 times the total amount of titanium oxide until fully immersed, then filter and dry to obtain titanium oxide agent; mix 3 parts of nano chromium powder, 2 parts of titanium oxide agent and 1 part of nano alumina evenly to obtain additive;

[0050] S03: Modified carbon nanotube liquid and additives are ball-milled at a weight ratio of 7:3. After ball milling, the mixture is filtered and dried to obtain modified carbon nanotube agent.

[0051] In this embodiment, the yttrium sol solution is obtained by thoroughly mixing nano-silica sol and yttrium nitrate solution at a weight ratio of 3:5.

[0052] In this embodiment, the stirring speed for the stirring modification treatment is 350 r / min, and the stirring time is 1 h; the ball milling treatment is performed at a speed of 1050 r / min for 2 h.

[0053] The preparation method of the modified liquid in this embodiment is as follows:

[0054] S01a: Boron powder, sodium dodecylbenzenesulfonate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of 4:11:3 to obtain boron solution;

[0055] S102: Add 1 part of nano-silica and 2 parts of lanthanum oxide to 6 parts of dopamine hydrochloride solution and stir thoroughly. Finally, add 2 parts of boron solution and stir thoroughly to obtain the modified solution.

[0056] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 12%; the dopamine hydrochloride solution has a mass fraction of 3%.

[0057] The preparation method of the sintering aid in this embodiment is as follows: 2 parts of bismuth oxide, 1 part of calcium fluoride and 2 parts of magnesium oxide are mixed evenly to obtain the sintering aid.

[0058] This embodiment describes a method for preparing metal powder alloy materials.

[0059] Example 2.

[0060] This embodiment provides a method for preparing a metal powder alloy material, comprising the following steps:

[0061] Step 1: Weigh the raw materials according to the following weight proportions: 30 parts aluminum powder, 7 parts modified carbon nanotube agent, 7 parts nickel powder, 5 parts manganese powder, 5 parts zirconium powder, 4 parts iron powder, 3 parts copper powder, and 5 parts sintering aid.

[0062] Step 2: The raw material from Step 1 is hot-pressed into shape and then sintered. After the process is completed, the metal powder alloy material of the present invention is obtained.

[0063] In this embodiment, the hot pressing pressure is 25 MPa, and the pressing time is 1 hour; the sintering temperature for the sintering treatment is 500℃, and the sintering time is 1 hour.

[0064] The preparation method of the modified carbon nanotube agent in this embodiment is as follows:

[0065] S01: Preheat carbon nanotubes at 60℃ for 1 hour to obtain preheated carbon nanotubes. Add the preheated carbon nanotubes to a modification liquid with a volume of 8 times the total volume of carbon nanotubes and stir to modify the mixture. After stirring, the modified carbon nanotube liquid is obtained.

[0066] S02: Immerse titanium oxide in yttrium colloid solution with 5 times the total amount of titanium oxide until fully immersed, then filter and dry to obtain titanium oxide agent; mix 5 parts of nano chromium powder, 3 parts of titanium oxide agent and 2 parts of nano alumina evenly to obtain additive;

[0067] S03: Modified carbon nanotube liquid and additives are ball-milled at a weight ratio of 7:5. After ball milling, the mixture is filtered and dried to obtain modified carbon nanotube agent.

[0068] In this embodiment, the yttrium sol solution is obtained by thoroughly mixing nano-silica sol and yttrium nitrate solution at a weight ratio of 3:5.

[0069] In this embodiment, the stirring speed for the stirring modification treatment is 400 r / min, and the stirring time is 1 h; the ball milling treatment is performed at a ball milling speed of 1150 r / min for 2 h.

[0070] The preparation method of the modified liquid in this embodiment is as follows:

[0071] S01a: Boron powder, sodium dodecylbenzenesulfonate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of 7:15:3 to obtain boron solution;

[0072] S102: Add 3 parts of nano-silica and 3 parts of lanthanum oxide to 10 parts of dopamine hydrochloride solution and stir thoroughly. Finally, add 4 parts of boron solution and stir thoroughly to obtain the modified solution.

[0073] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 15%; the dopamine hydrochloride solution has a mass fraction of 5%.

[0074] The preparation method of the sintering aid in this embodiment is as follows: 3 parts of bismuth oxide, 3 parts of calcium fluoride and 3 parts of magnesium oxide are mixed evenly to obtain the sintering aid.

[0075] This embodiment describes a method for preparing metal powder alloy materials.

[0076] Example 3.

[0077] This embodiment provides a method for preparing a metal powder alloy material, comprising the following steps:

[0078] Step 1: Weigh the raw materials according to the following weight parts: 27.5 parts aluminum powder, 6 parts modified carbon nanotube agent, 5.5 parts nickel powder, 4 parts manganese powder, 4 parts zirconium powder, 3 parts iron powder, 2 parts copper powder, and 4 parts sintering aid.

[0079] Step 2: The raw material from Step 1 is hot-pressed into shape and then sintered. After the process is completed, the metal powder alloy material of the present invention is obtained.

[0080] In this embodiment, the hot pressing pressure is 20 MPa, and the pressing time is 1 hour; the sintering temperature for the sintering treatment is 475°C, and the sintering time is 1 hour.

[0081] The preparation method of the modified carbon nanotube agent in this embodiment is as follows:

[0082] S01: Preheat carbon nanotubes at 57°C for 1 hour to obtain preheated carbon nanotubes. Add the preheated carbon nanotubes to a modification liquid with a volume of 6.5 times the total volume of carbon nanotubes and stir to modify the mixture. After stirring, the modified carbon nanotube liquid is obtained.

[0083] S02: Immerse titanium oxide in yttrium colloid solution with 4 times the total amount of titanium oxide until fully immersed, then filter and dry to obtain titanium oxide agent; mix 4 parts of nano chromium powder, 2.5 parts of titanium oxide agent and 1.5 parts of nano alumina evenly to obtain additive;

[0084] S03: Modified carbon nanotube liquid and additives are ball-milled at a weight ratio of 7:4. After ball milling, the mixture is filtered and dried to obtain modified carbon nanotube agent.

[0085] In this embodiment, the yttrium sol solution is obtained by thoroughly mixing nano-silica sol and yttrium nitrate solution at a weight ratio of 3:5.

[0086] In this embodiment, the stirring speed for the stirring modification treatment is 375 r / min, and the stirring time is 1 h; the ball milling treatment is performed at a speed of 1100 r / min for 2 h.

[0087] The preparation method of the modified liquid in this embodiment is as follows:

[0088] S01a: Boron powder, sodium dodecylbenzenesulfonate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of 5.5:13:3 to obtain boron solution;

[0089] S102: Add 2 parts of nano-silica and 2.5 parts of lanthanum oxide to 8 parts of dopamine hydrochloride solution and stir thoroughly. Finally, add 3 parts of boron solution and stir thoroughly to obtain the modified solution.

[0090] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 13.5%; the dopamine hydrochloride solution has a mass fraction of 4%.

[0091] The sintering aid in this embodiment is prepared by mixing 2.5 parts of bismuth oxide, 2 parts of calcium fluoride and 2.5 parts of magnesium oxide evenly to obtain the sintering aid.

[0092] This embodiment describes a method for preparing metal powder alloy materials.

[0093] Example 4.

[0094] This embodiment provides a method for preparing a metal powder alloy material, comprising the following steps:

[0095] Step 1: Weigh the raw materials according to the following weight proportions: 26 parts aluminum powder, 6 parts modified carbon nanotube agent, 5 parts nickel powder, 4 parts manganese powder, 4 parts zirconium powder, 3 parts iron powder, 2 parts copper powder, and 4 parts sintering aid.

[0096] Step 2: The raw material from Step 1 is hot-pressed into shape and then sintered. After the process is completed, the metal powder alloy material of the present invention is obtained.

[0097] In this embodiment, the hot pressing pressure is 17 MPa, and the pressing time is 1 hour; the sintering temperature for the sintering treatment is 460°C, and the sintering time is 1 hour.

[0098] The preparation method of the modified carbon nanotube agent in this embodiment is as follows:

[0099] S01: Preheat carbon nanotubes at 56℃ for 1 hour to obtain preheated carbon nanotubes. Add the preheated carbon nanotubes to a modification liquid with a volume of 6 times the total volume of carbon nanotubes and stir to modify the mixture. After stirring, the modified carbon nanotube liquid is obtained.

[0100] S02: Immerse titanium oxide in yttrium colloid solution with 4 times the total amount of titanium oxide until fully immersed, then filter and dry to obtain titanium oxide agent; mix 4 parts of nano chromium powder, 2 parts of titanium oxide agent and 1 part of nano alumina evenly to obtain additive;

[0101] S03: Modified carbon nanotube liquid and additives are ball-milled at a weight ratio of 7:4. After ball milling, the mixture is filtered and dried to obtain modified carbon nanotube agent.

[0102] In this embodiment, the yttrium sol solution is obtained by thoroughly mixing nano-silica sol and yttrium nitrate solution at a weight ratio of 3:5.

[0103] In this embodiment, the stirring speed for the stirring modification treatment is 360 r / min, and the stirring time is 1 h; the ball milling treatment is performed at a speed of 1100 r / min for 2 h.

[0104] The preparation method of the modified liquid in this embodiment is as follows:

[0105] S01a: Boron powder, sodium dodecylbenzenesulfonate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of 5:12:3 to obtain boron solution;

[0106] S102: Add 2 parts of nano-silica and 2 parts of lanthanum oxide to 7 parts of dopamine hydrochloride solution and stir thoroughly. Finally, add 3 parts of boron solution and stir thoroughly to obtain the modified solution.

[0107] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 13%; the dopamine hydrochloride solution has a mass fraction of 4%.

[0108] The preparation method of the sintering aid in this embodiment is as follows: 2 parts of bismuth oxide, 2 parts of calcium fluoride and 3 parts of magnesium oxide are mixed evenly to obtain the sintering aid.

[0109] This embodiment describes a method for preparing metal powder alloy materials.

[0110] Example 5.

[0111] This embodiment provides a method for preparing a metal powder alloy material, comprising the following steps:

[0112] Step 1: Weigh the raw materials according to the following weight proportions: 29 parts aluminum powder, 6 parts modified carbon nanotube agent, 6 parts nickel powder, 4 parts manganese powder, 4 parts zirconium powder, 3 parts iron powder, 2 parts copper powder, and 4 parts sintering aid.

[0113] Step 2: The raw material from Step 1 is hot-pressed into shape and then sintered. After the process is completed, the metal powder alloy material of the present invention is obtained.

[0114] In this embodiment, the hot pressing pressure is 22 MPa, and the pressing time is 1 hour; the sintering temperature for the sintering treatment is 490°C, and the sintering time is 1 hour.

[0115] The preparation method of the modified carbon nanotube agent in this embodiment is as follows:

[0116] S01: Preheat carbon nanotubes at 58°C for 1 hour to obtain preheated carbon nanotubes. Add the preheated carbon nanotubes to a modification liquid with a volume of 7 times the total volume of carbon nanotubes and stir to modify the mixture. After stirring, the modified carbon nanotube liquid is obtained.

[0117] S02: Immerse titanium oxide in yttrium gel solution with 4 times the total amount of titanium oxide until fully immersed, then filter and dry to obtain titanium oxide agent; mix 4 parts of nano chromium powder, 2 parts of titanium oxide agent and 1.6 parts of nano alumina evenly to obtain additive;

[0118] S03: Modified carbon nanotube liquid and additives are ball-milled at a weight ratio of 7:4. After ball milling, the mixture is filtered and dried to obtain modified carbon nanotube agent.

[0119] In this embodiment, the yttrium sol solution is obtained by thoroughly mixing nano-silica sol and yttrium nitrate solution at a weight ratio of 3:5.

[0120] In this embodiment, the stirring speed for the stirring modification treatment is 380 r / min, and the stirring time is 1 h; the ball milling treatment is performed at a speed of 1100 r / min for 2 h.

[0121] The preparation method of the modified liquid in this embodiment is as follows:

[0122] S01a: Boron powder, sodium dodecylbenzenesulfonate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of 5:13:3 to obtain boron solution;

[0123] S102: Add 2 parts of nano-silica and 3 parts of lanthanum oxide to 9 parts of dopamine hydrochloride solution and stir thoroughly. Finally, add 3 parts of boron solution and stir thoroughly to obtain the modified solution.

[0124] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 14%; the dopamine hydrochloride solution has a mass fraction of 4%.

[0125] The preparation method of the sintering aid in this embodiment is as follows: 2 parts of bismuth oxide, 2 parts of calcium fluoride and 3 parts of magnesium oxide are mixed evenly to obtain the sintering aid.

[0126] This embodiment describes a method for preparing metal powder alloy materials.

[0127] Comparative Example 1.

[0128] Unlike Example 3, no modified carbon nanotube agent was added.

[0129] Comparative Example 2.

[0130] Unlike Example 3, no additives were added during the preparation of the modified carbon nanotube agent.

[0131] Comparative Example 3.

[0132] Unlike Example 3, no titanium dioxide was added to the additive.

[0133] Comparative Example 4.

[0134] Unlike Example 3, no modifying liquid was added during the preparation of the modified carbon nanotube agent.

[0135] Comparative Example 5.

[0136] Unlike Example 3, boron solution was not added to the modified solution.

[0137] Comparative Example 6.

[0138] Unlike Example 3, the preparation method of the modified liquid is different, and nano-silica and lanthanum oxide were not added.

[0139] Performance tests were conducted in Examples 1-5 and Comparative Examples 1-6. The average corrosion rate was measured after 8 hours in a salt spray solution (5 wt% NaCl) followed by 16 hours. Fatigue resistance was tested according to standard GB / T3075-2020, involving 300,000 vibrations at 150 MPa and a vibration frequency of 120 Hz. The elastic modulus of the specimens was measured before and after the fatigue test. Fatigue resistance was expressed as the elastic modulus loss rate, where the elastic modulus loss rate = (elastic modulus before fatigue test - elastic modulus after fatigue test) / elastic modulus before fatigue test * 100%. A higher elastic modulus loss rate indicates poorer fatigue resistance of the alloy. The test results are as follows.

[0140]

[0141] As can be seen from Examples 1-5 and Comparative Examples 1-6, the product of the present invention can achieve coordinated improvement in compressive strength, elongation and fatigue resistance, while the product has significant corrosion resistance and stability.

[0142] The product's performance deteriorates significantly when no modified carbon nanotube agent is added. Furthermore, the modified carbon nanotube agent is not prepared with any additives, titanium dioxide is not included in the additives, and a modifying liquid is not added to the modified carbon nanotube agent. Additionally, boron solution is not added to the modifying liquid, and the product's performance deteriorates regardless of the preparation method of the modifying liquid. Only the raw materials obtained using the method of this invention exhibit the most significant performance improvement.

[0143] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0144] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for preparing a metal powder alloy material, characterized in that, Includes the following steps: Step 1: Weigh the raw materials according to the following weight parts: 25-30 parts aluminum powder, 5-7 parts modified carbon nanotube agent, 4-7 parts nickel powder, 3-5 parts manganese powder, 3-5 parts zirconium powder, 2-4 parts iron powder, 1-3 parts copper powder, and 3-5 parts sintering aid. Step 2: The raw material from Step 1 is hot-pressed into shape and then sintered. After the process is completed, the metal powder alloy material of the present invention is obtained.

2. The method for preparing a metal powder alloy material according to claim 1, characterized in that, The hot pressing pressure is 15-25 MPa, and the pressing time is 1 hour; the sintering temperature for the sintering treatment is 450-500℃, and the sintering time is 1 hour.

3. The method for preparing a metal powder alloy material according to claim 1, characterized in that, The preparation method of the modified carbon nanotube agent is as follows: S01: Preheat carbon nanotubes at 55-60℃ for 1 hour to obtain preheated carbon nanotubes. Add the preheated carbon nanotubes to a modification liquid of 5-8 times the total amount of carbon nanotubes and stir to modify the mixture. After stirring, the modified carbon nanotube liquid is obtained. S02: Immerse titanium oxide in yttrium gel solution with 3-5 times the total amount of titanium oxide until fully immersed, then filter and dry to obtain titanium oxide agent; mix 3-5 parts of nano chromium powder, 2-3 parts of titanium oxide agent and 1-2 parts of nano alumina evenly to obtain additive; S03: Modified carbon nanotube liquid and additives are ball-milled at a weight ratio of 7:(3-5). After ball milling, the mixture is filtered and dried to obtain modified carbon nanotube agent.

4. The method for preparing a metal powder alloy material according to claim 3, characterized in that, The yttrium sol solution is obtained by thoroughly mixing nano-silica sol and yttrium nitrate solution at a weight ratio of 3:

5.

5. The method for preparing a metal powder alloy material according to claim 3, characterized in that, The stirring speed for the stirring modification treatment is 350-400 r / min, and the stirring time is 1 h; the ball milling speed for the ball milling treatment is 1050-1150 r / min, and the ball milling time is 2 h.

6. The method for preparing a metal powder alloy material according to claim 3, characterized in that, The modified liquid is prepared by: S01a: Boron powder, sodium dodecylbenzenesulfonate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of (4-7):(11-15):3 to obtain boron solution; S102: Add 1-3 parts of nano-silica and 2-3 parts of lanthanum oxide to 6-10 parts of dopamine hydrochloride solution and stir thoroughly. Finally, add 2-4 parts of boron solution and stir thoroughly to obtain the modified solution.

7. The method for preparing a metal powder alloy material according to claim 6, characterized in that, The sodium dodecylbenzenesulfonate solution has a mass fraction of 12-15%; the dopamine hydrochloride solution has a mass fraction of 3-5%.

8. The method for preparing a metal powder alloy material according to claim 1, characterized in that, The sintering aid is prepared by mixing 2-3 parts of bismuth oxide, 1-3 parts of calcium fluoride and 2-3 parts of magnesium oxide evenly to obtain the sintering aid.

9. The metal powder alloy material prepared by the method for preparing a metal powder alloy material according to any one of claims 1-8.

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