Metal powder alloy material and method for producing the same

Abstract

The application relates to the technical field of metal alloy materials, in particular to a metal powder alloy material and a preparation method thereof, which comprises the following steps: weighing raw materials according to weight parts: 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 material, the aluminum powder serves as a matrix, is matched with alloying elements such as the nickel powder and the manganese powder, can form a stable intermetallic compound and a solid solution structure, the addition of the zirconium powder further refines grains and reduces internal defects, after hot-pressing and sintering, the material density is obviously improved, the pain point that traditional metals are difficult to simultaneously have high strength and high elongation is solved, and the metal powder alloy material can be suitable for scenes with high requirements on comprehensive mechanical properties such as mechanical structural parts and wear-resistant parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal alloy materials, in particular to a metal powder alloy material and a preparation method thereof. BACKGROUND

[0002] In modern industry, the performance requirements of metal materials are increasingly improved, especially in high strength, high elongation, fatigue resistance and corrosion resistance, and the traditional metal materials are often difficult to meet these complex performance requirements at the same time, which limits the use efficiency of the materials, based on which, the present application is further improved. SUMMARY

[0003] In view of the defects of the prior art, the purpose of the present application is to provide a metal powder alloy material and a preparation method thereof to solve the problems raised in the background art.

[0004] The technical problem solved by the present application adopts the following technical scheme:

[0005] The present application provides a preparation method of a metal powder alloy material, comprising the following steps:

[0006] Step one: weigh the raw materials according to the weight parts: 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 and 1-3 parts of copper powder, and 3-5 parts of sintering aid;

[0007] Step two: hot pressing the raw materials of step one, and then sintering treatment, after the treatment is completed, the metal powder alloy material of the present application is obtained.

[0008] Preferably, the pressure of the hot pressing is 15-25 MPa, and the pressure is 1 h; the sintering temperature of the sintering treatment is 450-500 DEG C, and the sintering is 1 h.

[0009] Preferably, the preparation method of the modified carbon nanotube agent is:

[0010] S01: preheat the carbon nanotubes at 55-60 DEG C for 1 h to obtain preheated carbon nanotubes, and then add the preheated carbon nanotubes to a modified liquid which is 5-8 times the total amount of carbon nanotubes, and stir to modify, after the stirring is completed, a modified carbon nanotube liquid is obtained;

[0011] S02: immerse the titanium oxide into a yttrium glue liquid which is 3-5 times the total amount of titanium oxide, and then filter and dry to obtain a titanium oxide agent; blend 3-5 parts of nano chromium powder, 2-3 parts of the titanium oxide agent and 1-2 parts of nano aluminum oxide uniformly to obtain an additive;

[0012] S03: the modified carbon nanotube liquid, the additive are ball milled according to the weight ratio 7: (3-5), after ball milling, filtration and drying, the modified carbon nanotube agent is obtained.

[0013] Preferably, the yttrium glue liquid is prepared by uniformly mixing nanosilica sol and yttrium nitrate solution according to the weight ratio 3:5.

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

[0015] Preferably, the preparation method of the modified liquid is as follows:

[0016] S01a: the boron powder, the sodium dodecyl benzene sulfonate solution and the silane coupling agent KH550 are uniformly blended according to the weight ratio (4-7) : (11-15) : 3 to obtain a boron liquid;

[0017] S102: 1-3 parts of nanosilica and 2-3 parts of lanthanum oxide are uniformly blended and added into 6-10 parts of a dopamine hydrochloride solution to stir sufficiently, and finally 2-4 parts of the boron liquid are added to stir sufficiently to obtain a modified liquid.

[0018] Preferably, the mass fraction of the sodium dodecyl benzene sulfonate solution is 12-15%, and the mass fraction of the dopamine hydrochloride solution is 3-5%.

[0019] Preferably, the preparation method of the sintering aid is as follows: 2-3 parts of bismuth oxide, 1-3 parts of calcium fluoride and 2-3 parts of magnesium oxide are uniformly blended to obtain a sintering aid.

[0020] The application also provides a metal powder alloy material prepared by the preparation method of the metal powder alloy material.

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

[0022] In the raw material of the application, the aluminum powder serves as a matrix, and is combined with alloying elements such as nickel powder and manganese powder to form stable intermetallic compounds and solid solution structures; the addition of zirconium powder further refines the crystal grains and reduces internal defects; after hot pressing and sintering, the material density is significantly improved, thereby solving the pain point that traditional metals are difficult to have both high strength and high elongation, and the application can adapt to scenes with high requirements for comprehensive mechanical properties, such as mechanical structural parts and wear-resistant parts.

[0023] The introduction of the modified carbon nanotube agent is a core innovation: after the carbon nanotube is treated by a modification liquid (containing boron powder, nano silicon dioxide, lanthanum oxide, etc.), the surface activity is improved, the carbon nanotube can be uniformly dispersed in the alloy matrix to form a "fiber reinforced" structure, the initiation and propagation of fatigue cracks are effectively inhibited, and the fatigue life of the material is improved; the nano chromium powder, the titanium oxide agent (yttrium doped modification) and the nano aluminum oxide in the modified carbon nanotube agent can form a dense oxidation protective film on the surface of the material; meanwhile, the trace addition of copper powder and iron powder can adjust the matrix potential and reduce the electrochemical corrosion rate; the sintering aid (bismuth oxide, calcium fluoride, magnesium oxide) can reduce the sintering temperature (450-500 DEG C, which is 100-150 DEG C lower than the traditional aluminum alloy sintering temperature), shorten the sintering time, and reduce the abnormal grain growth in the sintering process, thereby reducing the energy consumption while ensuring the consistency of the material performance.

[0024] The preparation process (preheating-modification liquid treatment-ball milling) of the modified carbon nanotube agent realizes multiple function integration: the modification of yttrium glue (nano silicon sol + yttrium nitrate) on titanium oxide can enhance the interfacial bonding force of titanium oxide with the carbon nanotube and the alloy matrix; the synergistic effect of boron liquid (boron powder + sodium dodecyl benzene sulfonate + silane coupling agent KH550) and dopamine hydrochloride can improve the dispersibility of the carbon nanotube and introduce antioxidant and corrosion-resistant components, so that a single modifier can realize the triple functions of "strengthening, anti-fatigue and corrosion resistance", thereby simplifying the raw material system and improving the performance stacking effect. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0026] The preparation method of the metal powder alloy material in the embodiment includes the following steps:

[0027] Step one: the raw materials are weighed according to the weight parts: 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;

[0028] Step two: the raw materials in step one are hot-pressed and sintered, and the metal powder alloy material in the present application is obtained after the treatment is completed.

[0029] The hot-pressing pressure of the embodiment is 15-25 MPa, and the pressure is 1 h; the sintering temperature of the sintering treatment is 450-500 DEG C, and the sintering is 1 h.

[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 one: according to the weight parts of raw materials: 25 parts of aluminum powder, 5 parts of modified carbon nanotube agent, 4 parts of nickel powder, 3 parts of manganese powder, 3 parts of zirconium powder, 2 parts of iron powder and 1 part of copper powder, and 3 parts of sintering aid;

[0045] Step two: hot-pressing the raw materials of step one, and then sintering treatment, to obtain the metal powder alloy material of the present application.

[0046] The hot-pressing pressure of the present embodiment is 15 MPa, and the pressure is 1 h; the sintering temperature of the sintering treatment is 450℃, and the sintering is 1 h.

[0047] The preparation method of the modified carbon nanotube agent of the present embodiment is:

[0048] S01: preheat the carbon nanotubes at 55℃ for 1 h to obtain preheated carbon nanotubes, and then add the preheated carbon nanotubes into a modified liquid which is 5 times the total amount of carbon nanotubes, and stir for modification treatment, and then obtain the modified carbon nanotube liquid;

[0049] S02: immerse the titanium oxide into a yttrium colloidal solution which is 3 times the total amount of titanium oxide, and then filter and dry to obtain a titanium oxide agent; blend 3 parts of nanometer chromium powder, 2 parts of the titanium oxide agent and 1 part of nanometer aluminum oxide uniformly to obtain an additive;

[0050] S03: ball mill the modified carbon nanotube liquid and the additive according to a weight ratio of 7:3, and then filter and dry to obtain the modified carbon nanotube agent.

[0051] The yttrium colloidal solution of the present embodiment is prepared by uniformly mixing nanometer silicon sol and yttrium nitrate solution according to a weight ratio of 3:5.

[0052] The stirring speed of the stirring modification treatment of the present embodiment is 350 r / min, and the stirring time is 1 h; the ball milling speed of the ball milling treatment is 1050 r / min, and the ball milling time is 2 h.

[0053] The preparation method of the modified liquid of the present embodiment is:

[0054] S01a: blend boron powder, sodium dodecyl benzene sulfonate solution and silane coupling agent KH550 uniformly according to a weight ratio of 4:11:3 to obtain a boron liquid;

[0055] S102: blend 1 part of nanometer silicon dioxide and 2 parts of lanthanum oxide into 6 parts of a dopamine hydrochloride solution and stir thoroughly, and then add 2 parts of the boron liquid and stir thoroughly to obtain the modified liquid.

[0056] The mass fraction of the sodium dodecyl benzene sulfonate solution of the present embodiment is 12%; the mass fraction of the dopamine hydrochloride solution is 3%.

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

[0058] The metal powder alloy material prepared by the preparation method of the metal powder alloy material of the embodiment.

[0059] Embodiment 2.

[0060] The preparation method of the metal powder alloy material of the embodiment comprises the following steps:

[0061] Step one: the raw materials are weighed according to the weight parts: 30 parts of aluminum powder, 7 parts of modified carbon nanotube agent, 7 parts of nickel powder, 5 parts of manganese powder, 5 parts of zirconium powder, 4 parts of iron powder, 3 parts of copper powder and 5 parts of sintering aid;

[0062] Step two: the raw materials in step one are hot-pressed and then sintered, and the metal powder alloy material of the embodiment is obtained after the treatment.

[0063] The hot-pressing pressure of the embodiment is 25 MPa, and the pressure is maintained for 1 hour; the sintering temperature of the sintering treatment is 500 DEG C, and the sintering is maintained for 1 hour.

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

[0065] S01: the carbon nanotubes are preheated at 60 DEG C for 1 hour to obtain preheated carbon nanotubes; the preheated carbon nanotubes are added into a modified liquid which is 8 times the total amount of the carbon nanotubes, and stirred for modification treatment; after the stirring is completed, a modified carbon nanotube liquid is obtained;

[0066] S02: the titanium oxide is immersed in a yttrium glue liquid which is 5 times the total amount of the titanium oxide, and then is filtered and dried to obtain a titanium oxide agent; 5 parts of nano-chromium powder, 3 parts of the titanium oxide agent and 2 parts of nano-alumina are uniformly blended to obtain an additive;

[0067] S03: the modified carbon nanotube liquid and the additive are ball milled according to a weight ratio of 7:5; after the ball milling is completed, the mixture is filtered and dried to obtain a modified carbon nanotube agent.

[0068] The yttrium glue liquid of the embodiment is prepared by uniformly mixing a nano-silica sol and a yttrium nitrate solution according to a weight ratio of 3:5.

[0069] The stirring speed of the stirring modification treatment of the embodiment is 400 r / min, and the stirring is maintained for 1 hour; the ball milling speed of the ball milling treatment is 1150 r / min, and the ball milling is maintained for 2 hours.

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

[0071] S01a: the boron powder, sodium dodecyl benzene sulfonate solution and silane coupling agent KH550 are uniformly blended according to a weight ratio of 7:15:3 to obtain a boron solution;

[0072] S102: 3 parts of nano-silicon dioxide and 3 parts of lanthanum oxide are blended and added into 10 parts of a dopamine hydrochloride solution to stir sufficiently, and then 4 parts of the boron solution are added to stir sufficiently to obtain a modified solution.

[0073] The mass fraction of the sodium dodecyl benzene sulfonate solution in the embodiment is 15%; and the mass fraction of the dopamine hydrochloride solution is 5%.

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

[0075] The metal powder alloy material prepared by the preparation method of the metal powder alloy material in the embodiment.

[0076] Embodiment 3.

[0077] The preparation method of the metal powder alloy material in the embodiment comprises the following steps:

[0078] Step one: the raw materials are weighed according to the weight parts: 27.5 parts of aluminum powder, 6 parts of a modified carbon nanotube agent, 5.5 parts of nickel powder, 4 parts of manganese powder, 4 parts of zirconium powder, 3 parts of iron powder, 2 parts of copper powder and 4 parts of a sintering aid;

[0079] Step two: the raw materials in step one are hot-pressed and then sintered, and the metal powder alloy material in the embodiment is obtained after the treatment.

[0080] The hot-pressing pressure in the embodiment is 20 MPa, and the pressure is maintained for 1 h; the sintering temperature of the sintering treatment is 475 ℃, and the sintering is maintained for 1 h.

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

[0082] S01: the carbon nanotubes are preheated for 1 h at 57 to obtain preheated carbon nanotubes, and the preheated carbon nanotubes are added into a modified solution with a total amount of 6.5 times that of the carbon nanotubes to stir and modify, and the modified carbon nanotube solution is obtained after the stirring.

[0083] S02: the titanium oxide is immersed in a yttrium glue solution with a total amount of 4 times that of the titanium oxide to immerse sufficiently, and then is extracted and dried to obtain a titanium oxide agent; 4 parts of nano-chromium powder, 2.5 parts of the titanium oxide agent and 1.5 parts of nano-aluminum oxide are uniformly blended to obtain an additive.

[0084] S03: the modified carbon nanotube solution and the additive are ball milled according to a weight ratio of 7:4, and the modified carbon nanotube agent is obtained after the ball milling, extraction and drying.

[0085] The yttrium glue solution of the embodiment is prepared by mixing nano-silica sol and yttrium nitrate solution in a weight ratio of 3:5.

[0086] The stirring speed of the stirring modification treatment of the embodiment is 375 r / min, and the stirring time is 1 h; the ball milling speed of the ball milling treatment is 1100 r / min, and the ball milling time is 2 h.

[0087] The preparation method of the modification liquid of the embodiment is as follows:

[0088] S01a: uniformly blend boron powder, sodium dodecyl benzene sulfonate solution and silane coupling agent KH550 in a weight ratio of 5.5:13:3 to obtain a boron liquid;

[0089] S102: blend 2 parts of nano-silicon dioxide and 2.5 parts of lanthanum oxide into 8 parts of a dopamine hydrochloride solution and stir until fully mixed, and then add 3 parts of the boron liquid and stir until fully mixed to obtain a modification liquid.

[0090] The mass fraction of the sodium dodecyl benzene sulfonate solution of the embodiment is 13.5%; and the mass fraction of the dopamine hydrochloride solution is 4%.

[0091] The preparation method of the sintering aid of the embodiment is as follows: uniformly blend 2.5 parts of bismuth oxide, 2 parts of calcium fluoride and 2.5 parts of magnesium oxide to obtain a sintering aid.

[0092] The metal powder alloy material prepared by the preparation method of the metal powder alloy material of the embodiment.

[0093] Embodiment 4.

[0094] The preparation method of the metal powder alloy material of the embodiment comprises the following steps:

[0095] Step one: weigh the raw materials according to the weight parts: 26 parts of aluminum powder, 6 parts of modified carbon nanotube agent, 5 parts of nickel powder, 4 parts of manganese powder, 4 parts of zirconium powder, 3 parts of iron powder, 2 parts of copper powder and 4 parts of sintering aid;

[0096] Step two: hot-press the raw materials of step one, and then perform sintering treatment, to obtain the metal powder alloy material of the embodiment.

[0097] The hot-pressing pressure of the hot-pressing of the embodiment is 17 MPa, and the pressure time is 1 h; the sintering temperature of the sintering treatment is 460℃, and the sintering time is 1 h.

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

[0099] S01: carbon nanotubes are preheated at 56℃ for 1h to obtain preheated carbon nanotubes, and the preheated carbon nanotubes are added to a modified liquid of 6 times the total amount of carbon nanotubes for stirring modification treatment, and after stirring, a modified carbon nanotube liquid is obtained;

[0100] S02: titanium oxide is immersed in a yttrium glue liquid of 4 times the total amount of titanium oxide for sufficient immersion, and then is filtered and dried to obtain a titanium oxide agent; 4 parts of nanometer chromium powder, 2 parts of the titanium oxide agent and 1 part of nanometer aluminum oxide are uniformly blended to obtain an additive;

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

[0102] The yttrium glue liquid of the embodiment is prepared by uniformly mixing nanometer silicon sol and yttrium nitrate solution at a weight ratio of 3:5.

[0103] The stirring speed of the stirring modification treatment of the embodiment is 360r / min, and the stirring time is 1h; the ball milling speed of the ball milling treatment is 1100r / min, and the ball milling time is 2h.

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

[0105] S01a: boron powder, sodium dodecyl benzene sulfonate solution and silane coupling agent KH550 are uniformly blended at a weight ratio of 5:12:3 to obtain a boron liquid;

[0106] S102: 2 parts of nanometer silicon dioxide and 2 parts of lanthanum oxide are blended and added to 7 parts of a dopamine hydrochloride solution for sufficient stirring, and finally 3 parts of the boron liquid are added and stirred to obtain a modified liquid.

[0107] The mass fraction of the sodium dodecyl benzene sulfonate solution of the embodiment is 13%; and the mass fraction of the dopamine hydrochloride solution is 4%.

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

[0109] The metal powder alloy material prepared by the preparation method of the metal powder alloy material of the embodiment.

[0110] Embodiment 5.

[0111] The preparation method of the metal powder alloy material of the embodiment comprises the following steps:

[0112] Step one: the raw materials are weighed according to the weight parts: 29 parts of aluminum powder, 6 parts of modified carbon nanotube agent, 6 parts of nickel powder, 4 parts of manganese powder, 4 parts of zirconium powder, 3 parts of iron powder, 2 parts of copper powder and 4 parts of sintering aid;

[0113] Step two: hot-pressing the raw material of step one, then sintering treatment, and obtaining the metal powder alloy material of the present application after the treatment.

[0114] The hot-pressing pressure of the present embodiment is 22 MPa, and the pressure is maintained for 1 h; the sintering temperature of the sintering treatment is 490℃, and the sintering is maintained for 1 h.

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

[0116] S01: preheat the carbon nanotubes at 58℃ for 1 h to obtain preheated carbon nanotubes, and then add the preheated carbon nanotubes into a modifier solution with a quantity of 7 times that of the total carbon nanotubes for stirring and modification treatment, and obtain modified carbon nanotube solution after the stirring is completed;

[0117] S02: immerse the titanium oxide into a yttrium colloidal solution with a quantity of 4 times that of the total titanium oxide for sufficient immersion, and then perform suction filtration and drying to obtain a titanium oxide agent; and uniformly blend 4 parts of nanometer chromium powder, 2 parts of the titanium oxide agent, and 1.6 parts of nanometer aluminum oxide to obtain an additive.

[0118] S03: ball mill the modified carbon nanotube solution and the additive according to a weight ratio of 7:4, and obtain a modified carbon nanotube agent after the ball milling is completed, suction filtration, and drying.

[0119] The yttrium colloidal solution of the present embodiment is prepared by uniformly mixing nanometer silicon sol and yttrium nitrate solution according to a weight ratio of 3:5.

[0120] The stirring speed of the stirring and modification treatment of the present embodiment is 380 r / min, and the stirring is maintained for 1 h; the ball milling speed of the ball milling treatment is 1100 r / min, and the ball milling is maintained for 2 h.

[0121] The preparation method of the modifier solution of the present embodiment is as follows:

[0122] S01a: uniformly blend boron powder, sodium dodecyl benzene sulfonate solution, and silane coupling agent KH550 according to a weight ratio of 5:13:3 to obtain a boron solution.

[0123] S102: uniformly blend 2 parts of nanometer silicon dioxide and 3 parts of lanthanum oxide, and then add them into 9 parts of a dopamine hydrochloride solution for sufficient stirring, and finally add 3 parts of the boron solution for sufficient stirring to obtain a modifier solution.

[0124] The mass fraction of the sodium dodecyl benzene sulfonate solution of the present embodiment is 14%; and the mass fraction of the dopamine hydrochloride solution is 4%.

[0125] The preparation method of the sintering aid of the present embodiment is as follows: uniformly blend 2 parts of bismuth oxide, 2 parts of calcium fluoride, and 3 parts of magnesium oxide to obtain a sintering aid.

[0126] The metal powder alloy material prepared by the preparation method of the metal powder alloy material of the embodiment.

[0127] Comparative Example 1.

[0128] Different from Example 3 is that the modified carbon nanotube agent is not added.

[0129] Comparative Example 2.

[0130] Different from Example 3 is that the additive is not added in the preparation of the modified carbon nanotube agent.

[0131] Comparative Example 3.

[0132] Different from Example 3 is that the titanium oxide agent is not added in the additive.

[0133] Comparative Example 4.

[0134] Different from Example 3 is that the modified liquid is not added in the preparation of the modified carbon nanotube agent.

[0135] Comparative Example 5.

[0136] Different from Example 3 is that the boron liquid is not added in the modified liquid.

[0137] Comparative Example 6.

[0138] Different from Example 3 is that the preparation method of the modified liquid is different, and the nano silicon dioxide and lanthanum oxide are not added.

[0139] The performance tests of Examples 1-5 and Comparative Examples 1-6, and the average corrosion rate is measured after being placed in a salt spray formed by a NaCl solution with a concentration of 5wt% for 8h and then placed for 16h, the fatigue resistance is tested according to the standard GB / T3075-2020, the sample is vibrated for 300000 times under 150Mpa, the vibration frequency is 120Hz, the elastic modulus of the sample is tested before and after the fatigue resistance test, and the fatigue resistance is represented by the elastic modulus loss rate, wherein the elastic modulus loss rate=(elastic modulus before fatigue test-elastic modulus after fatigue test) / elastic modulus before fatigue test*100%, the higher the elastic modulus loss rate is, the worse the fatigue resistance of the alloy is, and the test results are as follows

[0140]

[0141] From Examples 1-5 and Comparative Examples 1-6, it can be seen that the product of the application can realize the coordinated improvement of the compressive strength, elongation and fatigue resistance, and the effect of the product corrosion resistance is remarkable.

[0142] The performance of the product is significantly poor without adding the modified carbon nanotube agent, the modified carbon nanotube agent is prepared without adding an additive, the additive is prepared without adding a titanium oxide agent, the modified carbon nanotube agent is prepared without adding a modification liquid, the modification liquid is prepared without adding a boron liquid, the preparation method of the modification liquid is different, and the performance of the product has a poor trend without adding nano-silicon dioxide and lanthanum oxide, and the performance of the product is most significant only by using the raw material of the product prepared by the method.

[0143] It will be obvious to a person skilled in the art that, without departing from the spirit or essential characteristics of the application, the present application can be implemented in other specific forms. The present examples are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the specification as such. All changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

[0144] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description is made in this way only for the sake of clarity, and a person skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that can be understood by a person 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 is obtained. 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. The yttrium sol solution is obtained by thoroughly mixing nano-silica sol and yttrium nitrate solution at a weight ratio of 3:

5. 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. 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; the mass fraction of the sodium dodecylbenzenesulfonate solution is 12-15%; and the mass fraction of the dopamine hydrochloride solution is 3-5%.

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 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.

4. The metal powder alloy material prepared by the method for preparing a metal powder alloy material according to any one of claims 1-3.

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