A TiC particle reinforced aluminum alloy powder for metal 3D printing and a preparation method thereof

Abstract

The present invention relates to a TiC particle reinforced aluminum alloy powder for metal 3D printing, wherein the aluminum alloy powder comprises an aluminum alloy matrix, and 5-10% of the total amount of the aluminum alloy powder is further added to the aluminum alloy matrix to obtain an aluminum alloy body, and the aluminum alloy body is further treated with a modifying liquid to obtain the TiC particle reinforced aluminum alloy powder. The TiC particle reinforced aluminum alloy powder of the present invention adopts the method of adding modified TiC powder to the aluminum alloy matrix and then treating with a modifying liquid, and the raw materials are coordinated and coordinated to enhance the synergy, so that the aluminum alloy fracture performance of the product is excellent, and the heat resistance, impact resistance stability, and acid corrosion stability of the product are remarkable.

Description

Technical Field

[0001] The present invention relates to the technical field of adsorbent materials, and in particular to a TiC particle reinforced aluminum alloy powder for metal 3D printing and a preparation method thereof. Background Art

[0002] Aluminum alloy has the advantages of low density, high specific strength and specific modulus, corrosion resistance, and good thermal conductivity. It has become a lightweight alloy powder material widely used in the field of 3D printing. Metal additive manufacturing technology (also known as 3D printing technology) is a technology that uses metal powder and other bondable materials to construct objects by printing layer by layer.

[0003] The aluminum alloy prepared in the prior art has poor fracture performance, and the product has poor heat resistance and impact resistance stability, as well as low acid corrosion stability, which further limits the performance effect of the product. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a TiC particle reinforced aluminum alloy powder for metal 3D printing and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] The present invention provides a TiC particle reinforced aluminum alloy powder for metal 3D printing. The aluminum alloy powder comprises an aluminum alloy matrix, to which 5-10% of the total amount of the aluminum alloy powder is added modified TiC powder to obtain an aluminum alloy body, and the aluminum alloy body is further treated with a modifying liquid to obtain the TiC particle reinforced aluminum alloy powder.

[0007] Preferably, the preparation method of the modified TiC powder is:

[0008] S01: The TiC powder is first heat-treated at 55-60° C. for 10-15 minutes, and then immersed in a lanthanum chloride solution for immersion treatment. After the immersion is completed, the powder is filtered and dried to obtain a lanthanum-doped TiC powder;

[0009] S02: Add 1-3 parts of silane coupling agent KH560 to 3-5 parts of 5% sodium lignin sulfonate solution, and then add 2-4 parts of dopamine hydrochloride solution and 2-3 parts of nano silicon dioxide to fully mix and obtain an improver;

[0010] S03: The lanthanum-doped TiC powder and the improver are mixed in a weight ratio of 5:3 and subjected to ball milling. After the ball milling is completed, the mixture is washed with water and dried to obtain modified TiC powder.

[0011] TiC powder is thermally modified and then combined with lanthanum chloride solution to optimize its activity performance. It is then improved with a modifier and the raw materials are coordinated and synergistic. TiC powder and nano-silicon dioxide work together to enhance product performance.

[0012] Preferably, the immersion ultrasonic power of the immersion treatment is 350-400W, and the immersion time is 20-30min; the ball milling speed of the mixing ball milling treatment is 1000-1500r / min, and the ball milling is 2h.

[0013] Preferably, the mass fraction of the lanthanum chloride solution is 2-5%; the mass fraction of the dopamine hydrochloride solution is 4-7%.

[0014] Preferably, the mass ratio of the lanthanum chloride solution to the TiC powder is (5-7):2.

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

[0016] S11: placing the silicon carbide whiskers in a sufficient amount of sodium citrate solution, and then adding 5-10% of the total amount of the silicon carbide whiskers with a phosphate buffer solution, and mixing well to obtain a silicon carbide whisker solution;

[0017] S12: 1-3 parts of graphene, 2-4 parts of silane coupling agent KH550, and 2-4 parts of carboxymethyl cellulose are fully blended to obtain an additive, and the additive and silicon carbide whisker liquid are fully mixed in a weight ratio of 2:5 to obtain a modified liquid.

[0018] Preferably, the mass fraction of the sodium citrate solution is 2-5%; and the pH value of the phosphate buffer solution is 5.0.

[0019] The use of graphene combined with silicon carbide whiskers can enhance the alloy interface effect and optimize grain activity through the blending of the raw materials, thereby increasing the density of the organizational structure and improving the performance of the product.

[0020] A method for preparing TiC particle reinforced aluminum alloy powder for metal 3D printing comprises the following steps: adding 5-10% of the total amount of aluminum alloy powder into an aluminum alloy matrix, smelting the powder completely, cooling and shaping the powder, crushing the powder to a size of 100 meshes, and finally ultrasonically modifying the powder in a sufficient amount of modifying liquid. After the modification is completed, the powder is dried.

[0021] Preferably, the power of the ultrasonic modification is 350-400 W, and the ultrasonic time is 20-30 min.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The TiC particle reinforced aluminum alloy powder of the present invention is prepared by adding modified TiC powder into an aluminum alloy matrix and then treating it with a modifying liquid. The raw materials are coordinated and synergized to achieve excellent aluminum alloy fracture performance. The product also has significant effects on heat resistance, impact resistance stability, and acid corrosion stability. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. 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.

[0025] The present embodiment provides a TiC particle reinforced aluminum alloy powder for metal 3D printing, wherein the aluminum alloy powder comprises an aluminum alloy matrix, to which modified TiC powder accounting for 5-10% of the total amount of the aluminum alloy powder is added to obtain an aluminum alloy body, and the aluminum alloy body is further treated with a modifying liquid to obtain a TiC particle reinforced aluminum alloy powder.

[0026] The preparation method of the modified TiC powder of this embodiment is:

[0027] S01: The TiC powder is first heat-treated at 55-60° C. for 10-15 minutes, and then immersed in a lanthanum chloride solution for immersion treatment. After the immersion is completed, the powder is filtered and dried to obtain a lanthanum-doped TiC powder;

[0028] S02: Add 1-3 parts of silane coupling agent KH560 to 3-5 parts of 5% sodium lignin sulfonate solution, and then add 2-4 parts of dopamine hydrochloride solution and 2-3 parts of nano silicon dioxide to fully mix and obtain an improver;

[0029] S03: The lanthanum-doped TiC powder and the improver are mixed in a weight ratio of 5:3 and subjected to ball milling. After the ball milling is completed, the mixture is washed with water and dried to obtain modified TiC powder.

[0030] The immersion ultrasonic power of the immersion treatment in this embodiment is 350-400W, and the immersion time is 20-30min; the ball milling speed of the mixing ball milling treatment is 1000-1500r / min, and the ball milling is 2h.

[0031] The mass fraction of the lanthanum chloride solution in this embodiment is 2-5%; the mass fraction of the dopamine hydrochloride solution is 4-7%.

[0032] The mass ratio of the lanthanum chloride solution and the TiC powder in this embodiment is (5-7):2.

[0033] The preparation method of the modified liquid of this embodiment is:

[0034] S11: placing the silicon carbide whiskers in a sufficient amount of sodium citrate solution, and then adding 5-10% of the total amount of the silicon carbide whiskers with a phosphate buffer solution, and mixing well to obtain a silicon carbide whisker solution;

[0035] S12: 1-3 parts of graphene, 2-4 parts of silane coupling agent KH550, and 2-4 parts of carboxymethyl cellulose are fully blended to obtain an additive, and the additive and silicon carbide whisker liquid are fully mixed in a weight ratio of 2:5 to obtain a modified liquid.

[0036] The mass fraction of the sodium citrate solution in this embodiment is 2-5%; the pH value of the phosphate buffer solution is 5.0.

[0037] The present embodiment provides a method for preparing TiC particle reinforced aluminum alloy powder for metal 3D printing, comprising adding 5-10% of the total amount of aluminum alloy powder to an aluminum alloy matrix, smelting the powder completely, cooling the powder to set the powder, crushing the powder to a size of 100 mesh, and finally ultrasonically modifying the powder in a sufficient amount of modifying liquid. After the modification is completed, the powder is dried.

[0038] The power of ultrasonic modification in this embodiment is 350-400W, and the ultrasonic time is 20-30min.

[0039] Example 1.

[0040] The present embodiment provides a TiC particle reinforced aluminum alloy powder for metal 3D printing, wherein the aluminum alloy powder comprises an aluminum alloy matrix, to which modified TiC powder accounting for 5-10% of the total amount of the aluminum alloy powder is added to obtain an aluminum alloy body, and the aluminum alloy body is further treated with a modifying liquid to obtain a TiC particle reinforced aluminum alloy powder.

[0041] The preparation method of the modified TiC powder of this embodiment is:

[0042] S01: The TiC powder is first heat-treated at 55° C. for 10 minutes, and then immersed in a lanthanum chloride solution for immersion treatment. After the immersion is completed, the powder is filtered and dried to obtain a lanthanum-doped TiC powder;

[0043] S02: Add 1 part of silane coupling agent KH560 to 3 parts of 5% sodium lignin sulfonate solution, and then add 2 parts of dopamine hydrochloride solution and 2 parts of nano-silicon dioxide to fully mix and obtain an improver;

[0044] S03: The lanthanum-doped TiC powder and the improver are mixed in a weight ratio of 5:3 and subjected to ball milling. After the ball milling is completed, the mixture is washed with water and dried to obtain modified TiC powder.

[0045] The immersion ultrasonic power of the immersion treatment in this embodiment is 350W, and the immersion time is 20min; the ball milling speed of the mixing ball milling treatment is 1000r / min, and the ball milling is 2h.

[0046] The mass fraction of the lanthanum chloride solution in this embodiment is 2%; the mass fraction of the dopamine hydrochloride solution is 4%.

[0047] The mass ratio of the lanthanum chloride solution to the TiC powder in this embodiment is 5:2.

[0048] The preparation method of the modified liquid of this embodiment is:

[0049] S11: placing the silicon carbide whiskers in a sufficient amount of sodium citrate solution, and then adding a phosphate buffer solution of 5% of the total amount of the silicon carbide whiskers, and mixing well to obtain a silicon carbide whisker solution;

[0050] S12: 1 part of graphene, 2 parts of silane coupling agent KH550, and 2 parts of carboxymethyl cellulose are fully blended to obtain an additive, and the additive and silicon carbide whisker liquid are fully mixed in a weight ratio of 2:5 to obtain a modified liquid.

[0051] The mass fraction of the sodium citrate solution in this embodiment is 2%; the pH value of the phosphate buffer solution is 5.0.

[0052] The present embodiment provides a method for preparing TiC particle reinforced aluminum alloy powder for metal 3D printing, comprising adding 5% of the total amount of aluminum alloy powder to an aluminum alloy matrix, smelting the powder completely, cooling the powder to set the powder, crushing the powder to a size of 100 mesh, and finally ultrasonically modifying the powder in a sufficient amount of modifying liquid, drying the powder after modification is completed.

[0053] The power of ultrasonic modification in this embodiment is 350W, and the ultrasonic time is 20min.

[0054] Example 2.

[0055] The present embodiment provides a TiC particle reinforced aluminum alloy powder for metal 3D printing, wherein the aluminum alloy powder comprises an aluminum alloy matrix, to which modified TiC powder accounting for 5-10% of the total amount of the aluminum alloy powder is added to obtain an aluminum alloy body, and the aluminum alloy body is further treated with a modifying liquid to obtain a TiC particle reinforced aluminum alloy powder.

[0056] The preparation method of the modified TiC powder of this embodiment is:

[0057] S01: The TiC powder is first heat-treated at 60° C. for 15 minutes, and then immersed in a lanthanum chloride solution for immersion treatment. After the immersion is completed, the powder is filtered and dried to obtain a lanthanum-doped TiC powder;

[0058] S02: Add 3 parts of silane coupling agent KH560 to 5 parts of 5% sodium lignin sulfonate solution, and then add 4 parts of dopamine hydrochloride solution and 3 parts of nano-silicon dioxide to fully mix and obtain an improver;

[0059] S03: The lanthanum-doped TiC powder and the improver are mixed in a weight ratio of 5:3 and subjected to ball milling. After the ball milling is completed, the mixture is washed with water and dried to obtain modified TiC powder.

[0060] The immersion ultrasonic power of the immersion treatment in this embodiment is 400W, and the immersion time is 30min; the ball milling speed of the mixing ball milling treatment is 1500r / min, and the ball milling is 2h.

[0061] The mass fraction of the lanthanum chloride solution in this embodiment is 5%; the mass fraction of the dopamine hydrochloride solution is 7%.

[0062] The mass ratio of the lanthanum chloride solution to the TiC powder in this embodiment is 7:2.

[0063] The preparation method of the modified liquid of this embodiment is:

[0064] S11: placing the silicon carbide whiskers in a sufficient amount of sodium citrate solution, and then adding a phosphate buffer solution of 10% of the total amount of the silicon carbide whiskers, and mixing well to obtain a silicon carbide whisker solution;

[0065] S12: 3 parts of graphene, 4 parts of silane coupling agent KH550, and 4 parts of carboxymethyl cellulose are fully blended to obtain an additive, and the additive and silicon carbide whisker liquid are fully mixed in a weight ratio of 2:5 to obtain a modified liquid.

[0066] The mass fraction of the sodium citrate solution in this embodiment is 5%; the pH value of the phosphate buffer solution is 5.0.

[0067] The present embodiment provides a method for preparing TiC particle reinforced aluminum alloy powder for metal 3D printing, comprising adding 10% of the total amount of aluminum alloy powder to an aluminum alloy matrix, smelting the powder completely, cooling the powder to set the powder, crushing the powder to a size of 100 mesh, and finally ultrasonically modifying the powder in a sufficient amount of modifying liquid, drying the powder after modification is completed.

[0068] The power of ultrasonic modification in this embodiment is 400W, and the ultrasonic time is 30min.

[0069] Example 3.

[0070] The present embodiment provides a TiC particle reinforced aluminum alloy powder for metal 3D printing, wherein the aluminum alloy powder comprises an aluminum alloy matrix, to which modified TiC powder accounting for 10% of the total amount of the aluminum alloy powder is added to obtain an aluminum alloy body, and the aluminum alloy body is further treated with a modifying liquid to obtain a TiC particle reinforced aluminum alloy powder.

[0071] The preparation method of the modified TiC powder of this embodiment is:

[0072] S01: The TiC powder is first heat-treated at 60° C. for 15 minutes, and then immersed in a lanthanum chloride solution for immersion treatment. After the immersion is completed, the powder is filtered and dried to obtain a lanthanum-doped TiC powder;

[0073] S02: Add 3 parts of silane coupling agent KH560 to 5 parts of 5% sodium lignin sulfonate solution, and then add 4 parts of dopamine hydrochloride solution and 3 parts of nano-silicon dioxide to fully mix and obtain an improver;

[0074] S03: The lanthanum-doped TiC powder and the improver are mixed in a weight ratio of 5:3 and subjected to ball milling. After the ball milling is completed, the mixture is washed with water and dried to obtain modified TiC powder.

[0075] The immersion ultrasonic power of the immersion treatment in this embodiment is 400W, and the immersion time is 30min; the ball milling speed of the mixing ball milling treatment is 1500r / min, and the ball milling is 2h.

[0076] The mass fraction of the lanthanum chloride solution in this embodiment is 5%; the mass fraction of the dopamine hydrochloride solution is 7%.

[0077] The mass ratio of the lanthanum chloride solution to the TiC powder in this embodiment is 7:2.

[0078] The preparation method of the modified liquid of this embodiment is:

[0079] S11: placing the silicon carbide whiskers in a sufficient amount of sodium citrate solution, and then adding a phosphate buffer solution of 10% of the total amount of the silicon carbide whiskers, and mixing well to obtain a silicon carbide whisker solution;

[0080] S12: 3 parts of graphene, 4 parts of silane coupling agent KH550, and 4 parts of carboxymethyl cellulose are fully blended to obtain an additive, and the additive and silicon carbide whisker liquid are fully mixed in a weight ratio of 2:5 to obtain a modified liquid.

[0081] The mass fraction of the sodium citrate solution in this embodiment is 5%; the pH value of the phosphate buffer solution is 5.0.

[0082] The present embodiment provides a method for preparing TiC particle reinforced aluminum alloy powder for metal 3D printing, comprising adding 10% of the total amount of aluminum alloy powder to an aluminum alloy matrix, smelting the powder completely, cooling the powder to set the powder, crushing the powder to a size of 100 mesh, and finally ultrasonically modifying the powder in a sufficient amount of modifying liquid, drying the powder after modification is completed.

[0083] The power of ultrasonic modification in this embodiment is 400W, and the ultrasonic time is 30min.

[0084] Example 4.

[0085] The present embodiment provides a TiC particle reinforced aluminum alloy powder for metal 3D printing, wherein the aluminum alloy powder comprises an aluminum alloy matrix, to which modified TiC powder accounting for 6% of the total amount of the aluminum alloy powder is added to obtain an aluminum alloy body, and the aluminum alloy body is further treated with a modifying liquid to obtain a TiC particle reinforced aluminum alloy powder.

[0086] The preparation method of the modified TiC powder of this embodiment is:

[0087] S01: The TiC powder is first heat-treated at 56° C. for 12 minutes, and then immersed in a lanthanum chloride solution for immersion treatment. After the immersion is completed, the powder is filtered and dried to obtain a lanthanum-doped TiC powder;

[0088] S02: Add 2 parts of silane coupling agent KH560 to 4 parts of 5% sodium lignin sulfonate solution, and then add 3 parts of dopamine hydrochloride solution and 2 parts of nano silicon dioxide to fully mix and obtain an improver;

[0089] S03: The lanthanum-doped TiC powder and the improver are mixed in a weight ratio of 5:3 and subjected to ball milling. After the ball milling is completed, the mixture is washed with water and dried to obtain modified TiC powder.

[0090] The immersion ultrasonic power of the immersion treatment in this embodiment is 360W, and the immersion time is 22min; the ball milling speed of the mixing ball milling treatment is 1230r / min, and the ball milling is 2h.

[0091] The mass fraction of the lanthanum chloride solution in this embodiment is 3%; the mass fraction of the dopamine hydrochloride solution is 5%.

[0092] The mass ratio of the lanthanum chloride solution to the TiC powder in this embodiment is 6:2.

[0093] The preparation method of the modified liquid of this embodiment is:

[0094] S11: placing the silicon carbide whiskers in a sufficient amount of sodium citrate solution, and then adding a phosphate buffer solution of 6% of the total amount of the silicon carbide whiskers, and mixing well to obtain a silicon carbide whisker solution;

[0095] S12: 2 parts of graphene, 3 parts of silane coupling agent KH550, and 3 parts of carboxymethyl cellulose are fully blended to obtain an additive, and the additive and silicon carbide whisker liquid are fully mixed in a weight ratio of 2:5 to obtain a modified liquid.

[0096] The mass fraction of the sodium citrate solution in this embodiment is 3%; the pH value of the phosphate buffer solution is 5.0.

[0097] The present embodiment provides a method for preparing TiC particle reinforced aluminum alloy powder for metal 3D printing, comprising adding 6% of the total amount of aluminum alloy powder to an aluminum alloy matrix, smelting the powder completely, cooling and shaping the powder, crushing the powder to a size of 100 mesh, and finally ultrasonically modifying the powder in a sufficient amount of modifying liquid, drying the powder after modification is completed.

[0098] The power of ultrasonic modification in this embodiment is 360W, and the ultrasonic time is 22min.

[0099] Example 5.

[0100] The present embodiment provides a TiC particle reinforced aluminum alloy powder for metal 3D printing, wherein the aluminum alloy powder comprises an aluminum alloy matrix, to which modified TiC powder accounting for 9% of the total amount of the aluminum alloy powder is added to obtain an aluminum alloy body, and the aluminum alloy body is further treated with a modifying liquid to obtain a TiC particle reinforced aluminum alloy powder.

[0101] The preparation method of the modified TiC powder of this embodiment is:

[0102] S01: The TiC powder is first heat-treated at 56° C. for 12 minutes, and then immersed in a lanthanum chloride solution for immersion treatment. After the immersion is completed, the powder is filtered and dried to obtain a lanthanum-doped TiC powder;

[0103] S02: Add 2 parts of silane coupling agent KH560 to 4 parts of 5% sodium lignin sulfonate solution, and then add 3 parts of dopamine hydrochloride solution and 3 parts of nano-silicon dioxide to fully mix and obtain an improver;

[0104] S03: The lanthanum-doped TiC powder and the improver are mixed in a weight ratio of 5:3 and subjected to ball milling. After the ball milling is completed, the mixture is washed with water and dried to obtain modified TiC powder.

[0105] The immersion ultrasonic power of the immersion treatment in this embodiment is 390W, and the immersion time is 28min; the ball milling speed of the mixing ball milling treatment is 1450r / min, and the ball milling is 2h.

[0106] The mass fraction of the lanthanum chloride solution in this embodiment is 4%; the mass fraction of the dopamine hydrochloride solution is 6%.

[0107] The mass ratio of the lanthanum chloride solution to the TiC powder in this embodiment is 6:2.

[0108] The preparation method of the modified liquid of this embodiment is:

[0109] S11: placing the silicon carbide whiskers in a sufficient amount of sodium citrate solution, and then adding a phosphate buffer solution of 6% of the total amount of the silicon carbide whiskers, and mixing well to obtain a silicon carbide whisker solution;

[0110] S12: 2 parts of graphene, 3 parts of silane coupling agent KH550, and 3 parts of carboxymethyl cellulose are fully blended to obtain an additive, and the additive and silicon carbide whisker liquid are fully mixed in a weight ratio of 2:5 to obtain a modified liquid.

[0111] The mass fraction of the sodium citrate solution in this embodiment is 4%; the pH value of the phosphate buffer solution is 5.0.

[0112] The present embodiment provides a method for preparing TiC particle reinforced aluminum alloy powder for metal 3D printing, comprising adding 8% of the total amount of aluminum alloy powder to an aluminum alloy matrix, smelting the powder completely, cooling the powder to set the powder, crushing the powder to a size of 100 mesh, and finally ultrasonically modifying the powder in a sufficient amount of modifying liquid, drying the powder after modification is completed.

[0113] The power of ultrasonic modification in this embodiment is 350-400W, and the ultrasonic time is 20-30min.

[0114] Comparative Example 1.

[0115] The difference from Example 3 is that no modified TiC powder is added.

[0116] Comparative Example 2.

[0117] The difference from Example 3 is that no improver is used in the modified TiC powder.

[0118] Comparative Example 3.

[0119] The difference from Example 3 is that no dopamine hydrochloride solution or nano silicon dioxide is added to the improver.

[0120] Comparative Example 4.

[0121] The difference from Example 3 is that the S01 step is not used in the modified TiC powder.

[0122] Comparative Example 5.

[0123] The difference from Example 3 is that no modification liquid treatment was used.

[0124] Comparative Example 6.

[0125] The difference from Example 3 is that no additive is added to the modified liquid.

[0126] The products of Examples 1-5 and Comparative Examples 1-6 of the present invention were placed in a 2% hydrochloric acid mist for 24 hours and in a 10 J / cm 2 The impact toughness was impacted for 24 hours to test the product's heat resistance and impact resistance. The performance test results are as follows.

[0127]

[0128] It can be seen from Examples 1-5 and Comparative Examples 1-6 that the products of Examples 1-5 of the present invention have excellent elongation at break, and the products can quickly withstand hydrochloric acid mist conditions, and have significant heat resistance and impact resistance stability effects;

[0129] When the product does not contain modified TiC powder or does not use modified liquid, the acid corrosion resistance, heat resistance and impact resistance of the product will deteriorate significantly. When the two are used in combination, the performance of the product is most significant.

[0130] The modified TiC powder was not treated with a modifier, no dopamine hydrochloride solution or nano-silicon dioxide was added to the modifier, the modified TiC powder was not treated in step S01, and no additives were added to the modifying liquid. The performance of the products showed a trend of deterioration. Only the modified TiC powder and modifying liquid obtained by the method of the present invention had the most significant product performance effect. Other methods were not as obvious as the effect of the present invention.

[0131] 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0132] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A TiC particle reinforced aluminum alloy powder for metal 3D printing, the aluminum alloy powder comprising an aluminum alloy matrix, characterized in that: The aluminum alloy matrix is ​​further added with modified TiC powder accounting for 5-10% of the total amount of the aluminum alloy powder, and an aluminum alloy body is obtained by smelting. The aluminum alloy body is subjected to ultrasonic modification treatment with a modifying liquid to obtain TiC particle-reinforced aluminum alloy powder. The preparation method of the modified TiC powder is as follows: S01: The TiC powder is first heat-treated at 55-60° C. for 10-15 minutes, and then immersed in a lanthanum chloride solution for immersion treatment. After the immersion is completed, the powder is filtered and dried to obtain a lanthanum-doped TiC powder; S02: Add 1-3 parts of silane coupling agent KH560 to 3-5 parts of 5% sodium lignin sulfonate solution, and then add 2-4 parts of dopamine hydrochloride solution and 2-3 parts of nano-silicon dioxide to fully mix and obtain an improver; S03: mixing the lanthanum-doped TiC powder and the improver in a weight ratio of 5:3 and subjecting them to ball milling. After the ball milling is completed, washing and drying are performed to obtain modified TiC powder; The preparation method of the modified liquid is: S11: placing the silicon carbide whiskers in a sufficient amount of sodium citrate solution, and then adding 5-10% of the total amount of the silicon carbide whiskers with a phosphate buffer solution, and mixing well to obtain a silicon carbide whisker solution; S12: 1-3 parts of graphene, 2-4 parts of silane coupling agent KH550, and 2-4 parts of carboxymethyl cellulose are fully blended to obtain an additive, and the additive and silicon carbide whisker liquid are fully mixed in a weight ratio of 2:5 to obtain a modified liquid.

2. The TiC particle reinforced aluminum alloy powder for metal 3D printing according to claim 1, characterized in that: The immersion ultrasonic power of the immersion treatment is 350-400W, and the immersion time is 20-30min; the ball milling speed of the mixing ball milling treatment is 1000-1500r / min, and the ball milling is 2h.

3. The TiC particle reinforced aluminum alloy powder for metal 3D printing according to claim 1, characterized in that: The mass fraction of the lanthanum chloride solution is 2-5%; the mass fraction of the dopamine hydrochloride solution is 4-7%.

4. The TiC particle reinforced aluminum alloy powder for metal 3D printing according to claim 3, characterized in that: The mass ratio of the lanthanum chloride solution and the TiC powder is (5-7):

2.

5. The TiC particle reinforced aluminum alloy powder for metal 3D printing according to claim 1, characterized in that: The mass fraction of the sodium citrate solution is 2-5%; the pH value of the phosphate buffer solution is 5.

0.

6. A method for preparing TiC particle reinforced aluminum alloy powder for metal 3D printing according to any one of claims 1 to 5, characterized in that: Add 5-10% of the total amount of aluminum alloy powder to the aluminum alloy matrix, melt it completely, cool it to shape, crush it to 100 mesh, and finally ultrasonically modify it in a sufficient amount of modifying liquid. After the modification is completed, dry it.

7. The method for preparing TiC particle reinforced aluminum alloy powder for metal 3D printing according to claim 6, characterized in that: The power of the ultrasonic modification is 350-400W, and the ultrasonic time is 20-30min.

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