Al-Ce-Mg aluminum alloy for metal 3D printing and preparation method of Al-Ce-Mg aluminum alloy

Abstract

The invention discloses an Al-Ce-Mg aluminum alloy for metal 3D printing. The Al-Ce-Mg aluminum alloy comprises the following raw materials in parts by weight: 8-12 parts of Ce powder, 5-8 parts of Mg powder, 35-40 parts of Al powder, 2-5 parts of Sn powder, 1-3 parts of B powder, 3-5 parts of a yttrium adjusting modifier and 2-4 parts of an interphase modifier. According to the Al-Ce-Mg aluminum alloy, the Ce powder, the Mg powder and the Al powder serve as base materials, the Sn powder and the B powder are added to serve as functional auxiliaries, meanwhile, the yttrium adjusting modifier and the inter-phase modifier which are added cooperate and have a synergistic effect, the strength and abrasion resistance of the aluminum alloy of the product are improved in a coordinated mode, and the acid corrosion resistance stability of the product is excellent.

Description

Technical Field

[0001] The present invention relates to the technical field of metal 3D printing, and in particular to an Al-Ce-Mg aluminum alloy for metal 3D printing and a preparation method thereof. Background Art

[0002] Metal additive manufacturing technology (also known as 3D printing technology) is a technology that uses bondable materials such as metal powder to construct objects by printing layer by layer. Due to the low density and high specific mechanical properties of aluminum alloys, people have developed a strong interest in aluminum alloys in the field of additive manufacturing.

[0003] The strength and wear resistance of the aluminum alloy used in the prior art are difficult to improve in a coordinated manner, and the acid corrosion resistance of the product is poor, which limits the use efficiency of the product. Based on this, the present invention further improves it. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide an Al-Ce-Mg aluminum alloy 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: The present invention provides an Al-Ce-Mg aluminum alloy for metal 3D printing, wherein the Al-Ce-Mg aluminum alloy comprises the following raw materials in parts by weight:

[0006] 8-12 parts of Ce powder, 5-8 parts of Mg powder, 35-40 parts of Al powder, 2-5 parts of Sn powder, 1-3 parts of B powder, 3-5 parts of yttrium regulating modifier, and 2-4 parts of interphase modifier.

[0007] Preferably, the preparation method of the yttrium regulating modifier is:

[0008] S01: thermally modifying the graphene to obtain a thermally modified graphene body;

[0009] S02: immersing the thermally modified graphene body into a modification liquid having an amount of 3-5 times the total amount of the thermally modified graphene body, stirring and modifying the body, and after the stirring is completed, washing with water and drying the body to obtain a modified graphene agent;

[0010] Add 2-4 parts of silane coupling agent and 1-3 parts of sodium citrate to 4-7 parts of chitosan solution, and then add 2-3 parts of carboxymethyl cellulose and mix well to obtain a modified solution;

[0011] S03: adding 2-4 parts of 5% by mass yttrium nitrate solution to 5-7 parts of 4-7% by mass sodium alginate solution, and then adding 1-3 parts of nano-silica sol and 1-3 parts of urea to mix well to obtain yttrium solution;

[0012] S04: The modified graphene agent and yttrium adjustment liquid are mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1000-1500 r / min for 2 hours. After the ball-milling is completed, the mixture is washed with water and dried to obtain a yttrium adjustment modifier.

[0013] Preferably, the silane coupling agent is silane coupling agent KH560; and the mass fraction of the chitosan solution is 2-5%.

[0014] Preferably, the stirring speed of the stirring modification treatment is 450-750 r / min, and the stirring time is 20-30 min.

[0015] Preferably, the specific operation steps of the thermal improvement treatment are:

[0016] First, heat to 150-160°C at a rate of 1-3°C / min, keep warm for 5-10 minutes, then heat to 250-260°C at a rate of 2-5°C / min, keep warm for 5 minutes, and finally air cool to room temperature.

[0017] Preferably, the preparation method of the interphase modifier is:

[0018] S11: irradiating the nano-silicon dioxide in a proton irradiation box, and obtaining irradiated nano-silicon dioxide after the irradiation is completed;

[0019] S12: Add 2-4 parts of dopamine hydrochloride solution to 4-7 parts of lanthanum chloride solution, and then add 2-3 parts of silane coupling agent KH550 and 2-3 parts of nano-titanium dioxide to mix well to obtain a treatment solution, stir the irradiated nano-silicon dioxide and the treatment solution in a weight ratio of 2:5, wash with water and dry to obtain an interphase modifier.

[0020] Preferably, the irradiation power of the irradiation treatment is 350-400W, and the irradiation time is 20-30min.

[0021] Preferably, the mass fraction of the dopamine hydrochloride solution is 2-5%; the mass fraction of the lanthanum chloride solution is 4-7%.

[0022] Preferably, the stirring speed of the stirring treatment is 550-750 r / min, the stirring time is 30-40 min, and the stirring temperature is 50-55°C.

[0023] The present invention also provides a method for preparing an Al-Ce-Mg aluminum alloy for metal 3D printing, wherein the raw materials are fully mixed, then completely smelted, and then crushed through a 100-mesh sieve to obtain an Al-Ce-Mg aluminum alloy for metal 3D printing.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The Al-Ce-Mg aluminum alloy of the present invention adopts Ce, Mg powder and Al powder as matrix materials, and adds Sn powder and B powder as functional additives. At the same time, yttrium regulating modifier and interphase variable agent are added to cooperate with each other, so that the aluminum alloy strength and wear resistance of the product are improved in a coordinated manner, and the product has excellent acid corrosion resistance and stability. DETAILED DESCRIPTION

[0026] 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.

[0027] The Al-Ce-Mg aluminum alloy for metal 3D printing of this embodiment includes the following raw materials in parts by weight:

[0028] 8-12 parts of Ce powder, 5-8 parts of Mg powder, 35-40 parts of Al powder, 2-5 parts of Sn powder, 1-3 parts of B powder, 3-5 parts of yttrium regulating modifier, and 2-4 parts of interphase modifier.

[0029] The preparation method of the yttrium regulating modifier of this embodiment is:

[0030] S01: thermally modifying the graphene to obtain a thermally modified graphene body;

[0031] S02: immersing the thermally modified graphene body into a modification liquid having an amount of 3-5 times the total amount of the thermally modified graphene body, stirring and modifying the body, and after the stirring is completed, washing with water and drying the body to obtain a modified graphene agent;

[0032] Add 2-4 parts of silane coupling agent and 1-3 parts of sodium citrate to 4-7 parts of chitosan solution, and then add 2-3 parts of carboxymethyl cellulose and mix well to obtain a modified solution;

[0033] S03: adding 2-4 parts of 5% by mass yttrium nitrate solution to 5-7 parts of 4-7% by mass sodium alginate solution, and then adding 1-3 parts of nano-silica sol and 1-3 parts of urea to mix well to obtain yttrium solution;

[0034] S04: The modified graphene agent and yttrium adjustment liquid are mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1000-1500 r / min for 2 hours. After the ball-milling is completed, the mixture is washed with water and dried to obtain a yttrium adjustment modifier.

[0035] The silane coupling agent in this embodiment is silane coupling agent KH560; the mass fraction of the chitosan solution is 2-5%.

[0036] The stirring speed of the stirring modification treatment in this embodiment is 450-750 r / min, and the stirring time is 20-30 min.

[0037] The specific operation steps of the thermal improvement treatment of this embodiment are:

[0038] First, heat to 150-160°C at a rate of 1-3°C / min, keep warm for 5-10 minutes, then heat to 250-260°C at a rate of 2-5°C / min, keep warm for 5 minutes, and finally air cool to room temperature.

[0039] The preparation method of the phase modifier of this embodiment is:

[0040] S11: irradiating the nano-silicon dioxide in a proton irradiation box, and obtaining irradiated nano-silicon dioxide after the irradiation is completed;

[0041] S12: Add 2-4 parts of dopamine hydrochloride solution to 4-7 parts of lanthanum chloride solution, and then add 2-3 parts of silane coupling agent KH550 and 2-3 parts of nano-titanium dioxide to mix well to obtain a treatment solution, stir the irradiated nano-silicon dioxide and the treatment solution in a weight ratio of 2:5, wash with water and dry to obtain an interphase modifier.

[0042] The irradiation power of the irradiation treatment in this embodiment is 350-400W, and the irradiation time is 20-30min.

[0043] The mass fraction of the dopamine hydrochloride solution in this embodiment is 2-5%; the mass fraction of the lanthanum chloride solution is 4-7%.

[0044] The stirring speed of the stirring process in this embodiment is 550-750 r / min, the stirring time is 30-40 min, and the stirring temperature is 50-55°C.

[0045] In the method for preparing an Al-Ce-Mg aluminum alloy for metal 3D printing of the present embodiment, the raw materials are fully mixed, then completely smelted, and then crushed through a 100-mesh sieve to obtain an Al-Ce-Mg aluminum alloy for metal 3D printing.

[0046] Example 1.

[0047] The Al-Ce-Mg aluminum alloy for metal 3D printing of this embodiment includes the following raw materials in parts by weight:

[0048] 8 parts of Ce powder, 5 parts of Mg powder, 35 parts of Al powder, 2 parts of Sn powder, 1 part of B powder, 3 parts of yttrium regulating modifier, and 2 parts of interphase modifier.

[0049] The preparation method of the yttrium regulating modifier of this embodiment is:

[0050] S01: thermally modifying the graphene to obtain a thermally modified graphene body;

[0051] S02: immersing the thermally modified graphene body into a modification liquid having a volume 3 times the total volume of the thermally modified graphene body, stirring and modifying the body, and after the stirring is completed, washing with water and drying the body to obtain a modified graphene agent;

[0052] Add 2 parts of silane coupling agent and 1 part of sodium citrate to 4 parts of chitosan solution, and then add 2 parts of carboxymethyl cellulose and mix thoroughly to obtain a modified solution;

[0053] S03: adding 2 parts of 5% by mass yttrium nitrate solution to 5 parts of 4% by mass sodium alginate solution, and then adding 1 part of nano silica sol and 1 part of urea to mix well to obtain yttrium solution;

[0054] S04: The modified graphene agent and yttrium adjustment liquid are mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1000 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a yttrium adjustment modifier.

[0055] The silane coupling agent in this embodiment is silane coupling agent KH560; the mass fraction of the chitosan solution is 2%.

[0056] The stirring speed of the stirring modification treatment in this embodiment is 450 r / min, and the stirring time is 20 min.

[0057] The specific operation steps of the thermal improvement treatment of this embodiment are:

[0058] First, heat to 150°C at a rate of 1°C / min, keep warm for 5 min, then heat to 250°C at a rate of 2°C / min, keep warm for 5 min, and finally air cool to room temperature.

[0059] The preparation method of the phase modifier of this embodiment is:

[0060] S11: irradiating the nano-silicon dioxide in a proton irradiation box, and obtaining irradiated nano-silicon dioxide after the irradiation is completed;

[0061] S12: Add 2 parts of dopamine hydrochloride solution to 4 parts of lanthanum chloride solution, then add 2 parts of silane coupling agent KH550 and 2 parts of nano-titanium dioxide to mix well to obtain a treatment solution, stir the irradiated nano-silicon dioxide and the treatment solution in a weight ratio of 2:5, wash with water and dry to obtain an interphase modifier.

[0062] The irradiation power of the irradiation treatment in this embodiment is 350W, and the irradiation time is 20 minutes.

[0063] The mass fraction of the dopamine hydrochloride solution in this embodiment is 2%; the mass fraction of the lanthanum chloride solution is 4%.

[0064] The stirring speed of the stirring process in this embodiment is 550 r / min, the stirring time is 30 min, and the stirring temperature is 50°C.

[0065] In the method for preparing an Al-Ce-Mg aluminum alloy for metal 3D printing of the present embodiment, the raw materials are fully mixed, then completely smelted, and then crushed through a 100-mesh sieve to obtain an Al-Ce-Mg aluminum alloy for metal 3D printing.

[0066] Example 2.

[0067] The Al-Ce-Mg aluminum alloy for metal 3D printing of this embodiment includes the following raw materials in parts by weight:

[0068] 12 parts of Ce powder, 8 parts of Mg powder, 40 parts of Al powder, 5 parts of Sn powder, 3 parts of B powder, 5 parts of yttrium regulating modifier, and 4 parts of interphase modifier.

[0069] The preparation method of the yttrium regulating modifier of this embodiment is:

[0070] S01: thermally modifying the graphene to obtain a thermally modified graphene body;

[0071] S02: immersing the thermally modified graphene body into a modification liquid having a volume 5 times the total volume of the thermally modified graphene body, stirring and modifying the body, and after the stirring is completed, washing with water and drying the body to obtain a modified graphene agent;

[0072] 4 parts of silane coupling agent and 3 parts of sodium citrate were added to 7 parts of chitosan solution, and then 3 parts of carboxymethyl cellulose were added and mixed thoroughly to obtain a modified solution;

[0073] S03: adding 4 parts of 5% by mass yttrium nitrate solution to 7 parts of 7% by mass sodium alginate solution, and then adding 3 parts of nano-silica sol and 3 parts of urea to mix well to obtain yttrium solution;

[0074] S04: The modified graphene agent and yttrium adjustment liquid are mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 hours. After the ball-milling is completed, the mixture is washed with water and dried to obtain a yttrium adjustment modifier.

[0075] The silane coupling agent in this embodiment is silane coupling agent KH560; the mass fraction of the chitosan solution is 5%.

[0076] The stirring speed of the stirring modification treatment in this embodiment is 750 r / min, and the stirring time is 30 min.

[0077] The specific operation steps of the thermal improvement treatment of this embodiment are:

[0078] First, heat to 160°C at a rate of 3°C / min, keep warm for 10 min, then heat to 260°C at a rate of 5°C / min, keep warm for 5 min, and finally air cool to room temperature.

[0079] The preparation method of the phase modifier of this embodiment is:

[0080] S11: irradiating the nano-silicon dioxide in a proton irradiation box, and obtaining irradiated nano-silicon dioxide after the irradiation is completed;

[0081] S12: Add 4 parts of dopamine hydrochloride solution to 7 parts of lanthanum chloride solution, then add 3 parts of silane coupling agent KH550 and 3 parts of nano-titanium dioxide to mix well to obtain a treatment solution, stir the irradiated nano-silicon dioxide and the treatment solution in a weight ratio of 2:5, wash with water and dry to obtain an interphase modifier.

[0082] The irradiation power of the irradiation treatment in this embodiment is 400W, and the irradiation time is 30 minutes.

[0083] The mass fraction of the dopamine hydrochloride solution in this embodiment is 5%; the mass fraction of the lanthanum chloride solution is 7%.

[0084] The stirring speed of the stirring process in this embodiment is 750 r / min, the stirring time is 40 min, and the stirring temperature is 55°C.

[0085] In the method for preparing an Al-Ce-Mg aluminum alloy for metal 3D printing of the present embodiment, the raw materials are fully mixed, then completely smelted, and then crushed through a 100-mesh sieve to obtain an Al-Ce-Mg aluminum alloy for metal 3D printing.

[0086] Example 3.

[0087] The Al-Ce-Mg aluminum alloy for metal 3D printing of this embodiment includes the following raw materials in parts by weight:

[0088] 10 parts of Ce powder, 6.5 parts of Mg powder, 37.5 parts of Al powder, 3.5 parts of Sn powder, 2 parts of B powder, 4 parts of yttrium regulating modifier, and 3 parts of interphase modifier.

[0089] The preparation method of the yttrium regulating modifier of this embodiment is:

[0090] S01: thermally modifying the graphene to obtain a thermally modified graphene body;

[0091] S02: immersing the thermally modified graphene body into a modification liquid having an amount of 3-5 times the total amount of the thermally modified graphene body, stirring and modifying the body, and after the stirring is completed, washing with water and drying the body to obtain a modified graphene agent;

[0092] 3 parts of silane coupling agent and 2 parts of sodium citrate were added to 5.5 parts of chitosan solution, and then 2.5 parts of carboxymethyl cellulose were added and mixed thoroughly to obtain a modified solution;

[0093] S03: adding 3 parts of 5% by mass yttrium nitrate solution to 6 parts of 5.5% by mass sodium alginate solution, and then adding 2 parts of nano-silica sol and 2 parts of urea to mix well to obtain yttrium solution;

[0094] S04: The modified graphene agent and yttrium adjustment liquid are mixed in a weight ratio of 5:3, and the mixture is ball-milled at a speed of 1250 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a yttrium adjustment modifier.

[0095] The silane coupling agent in this embodiment is silane coupling agent KH560; the mass fraction of the chitosan solution is 3.5%.

[0096] The stirring speed of the stirring modification treatment in this embodiment is 550 r / min, and the stirring time is 25 min.

[0097] The specific operation steps of the thermal improvement treatment of this embodiment are:

[0098] First, the temperature was raised to 155°C at a rate of 2°C / min and kept at that temperature for 7.5min. Then, the temperature was raised to 255°C at a rate of 3.5°C / min and kept at that temperature for 5min. Finally, the mixture was air-cooled to room temperature.

[0099] The preparation method of the phase modifier of this embodiment is:

[0100] S11: irradiating the nano-silicon dioxide in a proton irradiation box, and obtaining irradiated nano-silicon dioxide after the irradiation is completed;

[0101] S12: Add 3 parts of dopamine hydrochloride solution to 5.5 parts of lanthanum chloride solution, then add 2.5 parts of silane coupling agent KH550 and 2.5 parts of nano-titanium dioxide to mix well to obtain a treatment solution, stir the irradiated nano-silicon dioxide and the treatment solution in a weight ratio of 2:5, wash with water and dry to obtain an interphase modifier.

[0102] The irradiation power of the irradiation treatment in this embodiment is 370W, and the irradiation time is 25 minutes.

[0103] The mass fraction of the dopamine hydrochloride solution in this embodiment is 3.5%; the mass fraction of the lanthanum chloride solution is 5.5%.

[0104] The stirring speed of the stirring process in this embodiment is 600 r / min, the stirring time is 35 min, and the stirring temperature is 52.5°C.

[0105] In the method for preparing an Al-Ce-Mg aluminum alloy for metal 3D printing of the present embodiment, the raw materials are fully mixed, then completely smelted, and then crushed through a 100-mesh sieve to obtain an Al-Ce-Mg aluminum alloy for metal 3D printing.

[0106] Example 4.

[0107] The Al-Ce-Mg aluminum alloy for metal 3D printing of this embodiment includes the following raw materials in parts by weight:

[0108] 9 parts of Ce powder, 6 parts of Mg powder, 36 parts of Al powder, 3 parts of Sn powder, 2 parts of B powder, 4 parts of yttrium regulating modifier, and 3 parts of interphase change agent.

[0109] The preparation method of the yttrium regulating modifier of this embodiment is:

[0110] S01: thermally modifying the graphene to obtain a thermally modified graphene body;

[0111] S02: immersing the thermally modified graphene body into a modification liquid having an amount of 3-5 times the total amount of the thermally modified graphene body, stirring and modifying the body, and after the stirring is completed, washing with water and drying the body to obtain a modified graphene agent;

[0112] 3 parts of silane coupling agent and 2 parts of sodium citrate were added to 5 parts of chitosan solution, and then 2 parts of carboxymethyl cellulose were added and mixed thoroughly to obtain a modified solution;

[0113] S03: adding 3 parts of 5% by mass yttrium nitrate solution to 6 parts of 4-7% by mass sodium alginate solution, and then adding 2 parts of nano-silica sol and 2 parts of urea to mix well to obtain yttrium solution;

[0114] S04: The modified graphene agent and yttrium adjustment liquid are mixed in a weight ratio of 5:3, and the mixture is ball-milled at a speed of 1250 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a yttrium adjustment modifier.

[0115] The silane coupling agent in this embodiment is silane coupling agent KH560; the mass fraction of the chitosan solution is 3%.

[0116] The stirring speed of the stirring modification treatment in this embodiment is 500 r / min, and the stirring time is 22 min.

[0117] The specific operation steps of the thermal improvement treatment of this embodiment are:

[0118] First, the temperature was raised to 152°C at a rate of 2°C / min and kept at that temperature for 6 min. Then, the temperature was raised to 252°C at a rate of 3°C / min and kept at that temperature for 5 min. Finally, the mixture was air-cooled to room temperature.

[0119] The preparation method of the phase modifier of this embodiment is:

[0120] S11: irradiating the nano-silicon dioxide in a proton irradiation box, and obtaining irradiated nano-silicon dioxide after the irradiation is completed;

[0121] S12: Add 3 parts of dopamine hydrochloride solution to 5 parts of lanthanum chloride solution, then add 3 parts of silane coupling agent KH550 and 2 parts of nano titanium dioxide to mix well to obtain a treatment solution, stir the irradiated nano silicon dioxide and the treatment solution in a weight ratio of 2:5, wash with water and dry to obtain an interphase modifier.

[0122] The irradiation power of the irradiation treatment in this embodiment is 360W, and the irradiation time is 22 minutes.

[0123] The mass fraction of the dopamine hydrochloride solution in this embodiment is 3%; the mass fraction of the lanthanum chloride solution is 5%.

[0124] The stirring speed of the stirring process in this embodiment is 580 r / min, the stirring time is 32 min, and the stirring temperature is 52°C.

[0125] In the method for preparing an Al-Ce-Mg aluminum alloy for metal 3D printing of the present embodiment, the raw materials are fully mixed, then completely smelted, and then crushed through a 100-mesh sieve to obtain an Al-Ce-Mg aluminum alloy for metal 3D printing.

[0126] Comparative Example 1.

[0127] The difference from Example 3 is that no yttrium regulating modifier is added.

[0128] Comparative Example 2.

[0129] The difference from Example 3 is that S01 treatment is not used in the yttrium regulating modifier.

[0130] Comparative Example 3.

[0131] The difference from Example 3 is that no modifying liquid is added to the yttrium regulating modifier for stirring.

[0132] Comparative Example 4.

[0133] The difference from Example 3 is that yttrium solution treatment is not used.

[0134] Comparative Example 5.

[0135] The difference from Example 3 is that no yttrium nitrate solution and urea are added to the yttrium conditioning solution.

[0136] Comparative Example 6.

[0137] The difference from Example 3 is that no phase change agent is added.

[0138] Comparative Example 7.

[0139] The difference from Example 3 is that no treatment liquid is added to the phase change agent.

[0140] The product performances of Examples 1-4 and Comparative Examples 1-7 of the present invention were tested under conventional conditions, and placed in 2% hydrochloric acid mist conditions for 24 hours to test the acid corrosion resistance of the products. The test results are as follows.

[0141]

[0142] It can be seen from Examples 1-4 and Comparative Examples 1-7 that the products of Examples 1-4 of the present invention have excellent tensile strength, excellent product wear rate effect, and excellent product performance stability under acid corrosion conditions;

[0143] When neither the yttrium modifier nor the interphase modifier is added to the product, the tensile strength and wear rate of the product have a significant deterioration trend. When the two are used in combination, the performance of the product is most significant.

[0144] The performance of the products tended to deteriorate when the yttrium regulating modifier was not treated with S01, the modifying liquid was not added to the yttrium regulating modifier for stirring, the yttrium regulating liquid was not treated, the yttrium nitrate solution and urea were not added to the yttrium regulating liquid, and the treating liquid was not added to the phase denaturant. Only the yttrium regulating modifier and the phase denaturant 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.

[0145] 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.

[0146] 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 metal 3D printed Al-Ce-Mg aluminum alloy, characterized in that: The Al-Ce-Mg aluminum alloy comprises the following raw materials in parts by weight: 8-12 parts of Ce powder, 5-8 parts of Mg powder, 35-40 parts of Al powder, 2-5 parts of Sn powder, 1-3 parts of B powder, 3-5 parts of yttrium regulating modifier, and 2-4 parts of interphase modifier.

2. The Al-Ce-Mg aluminum alloy for metal 3D printing according to claim 1, characterized in that: The preparation method of the yttrium regulating modifier is: S01: thermally modifying the graphene to obtain a thermally modified graphene body; S02: immersing the thermally modified graphene body into a modification liquid having an amount of 3-5 times the total amount of the thermally modified graphene body, stirring and modifying the body, and after the stirring is completed, washing with water and drying the body to obtain a modified graphene agent; Add 2-4 parts of silane coupling agent and 1-3 parts of sodium citrate to 4-7 parts of chitosan solution, and then add 2-3 parts of carboxymethyl cellulose and mix well to obtain a modified solution; S03: adding 2-4 parts of 5% by mass yttrium nitrate solution to 5-7 parts of 4-7% by mass sodium alginate solution, and then adding 1-3 parts of nano-silica sol and 1-3 parts of urea to mix well to obtain yttrium solution; S04: The modified graphene agent and yttrium adjustment liquid are mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1000-1500 r / min for 2 hours. After the ball-milling is completed, the mixture is washed with water and dried to obtain a yttrium adjustment modifier.

3. The Al-Ce-Mg aluminum alloy for metal 3D printing according to claim 2, characterized in that: The silane coupling agent is silane coupling agent KH560; the mass fraction of the chitosan solution is 2-5%.

4. The Al-Ce-Mg aluminum alloy for metal 3D printing according to claim 2, characterized in that: The stirring speed of the stirring modification treatment is 450-750 r / min, and the stirring time is 20-30 min.

5. The Al-Ce-Mg aluminum alloy for metal 3D printing according to claim 2, characterized in that: The specific operation steps of the thermal improvement treatment are: First, heat to 150-160°C at a rate of 1-3°C / min, keep warm for 5-10 minutes, then heat to 250-260°C at a rate of 2-5°C / min, keep warm for 5 minutes, and finally air cool to room temperature.

6. The Al-Ce-Mg aluminum alloy for metal 3D printing according to claim 1, characterized in that: The preparation method of the interphase modifier is: S11: irradiating the nano-silicon dioxide in a proton irradiation box, and obtaining irradiated nano-silicon dioxide after the irradiation is completed; S12: Add 2-4 parts of dopamine hydrochloride solution to 4-7 parts of lanthanum chloride solution, and then add 2-3 parts of silane coupling agent KH550 and 2-3 parts of nano-titanium dioxide to mix well to obtain a treatment solution, stir the irradiated nano-silicon dioxide and the treatment solution in a weight ratio of 2:5, wash with water and dry to obtain an interphase modifier.

7. The Al-Ce-Mg aluminum alloy for metal 3D printing according to claim 6, characterized in that: The irradiation power of the irradiation treatment is 350-400W, and the irradiation time is 20-30min.

8. The Al-Ce-Mg aluminum alloy for metal 3D printing according to claim 6, characterized in that: The mass fraction of the dopamine hydrochloride solution is 2-5%; the mass fraction of the lanthanum chloride solution is 4-7%.

9. The Al-Ce-Mg aluminum alloy for metal 3D printing according to claim 6, characterized in that: The stirring speed of the stirring treatment is 550-750 r / min, the stirring time is 30-40 min, and the stirring temperature is 50-55° C.

10. A method for preparing an Al-Ce-Mg aluminum alloy by metal 3D printing according to any one of claims 1 to 9, characterized in that: The raw materials are mixed thoroughly, then melted completely, and then crushed through a 100-mesh sieve to obtain the Al-Ce-Mg aluminum alloy for metal 3D printing.

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