A continuous aluminum profile processing technology

Abstract

The present invention discloses a continuous aluminum profile processing technology, which relates to the technical field of aluminum alloy processing. The processing technology of the present invention includes the following steps: S1: Add Al to a melting furnace and heat it to a completely molten state, then continue to add modified fly ash and carry out refining; S2: Continue to add alloy elements and completely melt them to obtain a molten liquid; S3: Cast and form the molten liquid, extrude, cool and quench, and straighten and temper to obtain an aluminum profile. The aluminum profile prepared by this application has the characteristics of excellent mechanical properties and excellent tensile strength at the weld after welding.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum alloy processing, and particularly relates to a continuous aluminum profile processing technology. Background Art

[0002] Green manufacturing is an important part of the construction of ecological civilization. In the field of transportation, the lightweighting of transportation tools is one of the important contents for realizing energy conservation, emission reduction and green development. Aluminum profiles have the advantages of high strength, light weight and corrosion resistance, and can meet the lightweight requirements of the transportation industry. They are widely used metal materials in the fields of aerospace, automobile manufacturing, machinery manufacturing, petrochemical industry, communication equipment, etc. As a metal plastic processing method with few or no cutting, extrusion has great superiority compared with forming processes such as free forging and film forging. Generally speaking, extruded parts have high accuracy, high surface finish, and the material utilization rate is significantly higher than other processing methods. At present, technologies such as forward extrusion, backward extrusion, and hydrostatic extrusion have been widely used in aluminum processing, and corresponding extrusion equipment has also emerged one after another.

[0003] In the continuous extrusion production of hollow aluminum profiles, the end-to-end connection of the front and rear two billets will result in transverse welds inside the profiles. The tensile fracture points in the transverse weld area are basically at the transverse welds. The fracture type of the material at the weld is mostly brittle fracture. The plasticity, strength and toughness of the material at the transverse weld are significantly lower than those of normal profiles. Through research and analysis of the evolution process of the grain shape, special grain boundaries and micro-texture in the transverse weld area of the profiles, it is found that in the early stage of the weld, the weld is wider, the new material area is mostly equiaxed grains, and the old material area is mostly elongated grains. Moreover, the recrystallization degree at the transverse weld is incomplete, mostly coarse grains and small-angle grain boundaries, which seriously affect the texture components and mechanical properties of the material. If the transverse weld area is not cut enough, it will be used as a normal profile, which will inevitably cause harm. If it is cut excessively, it will lead to a reduction in production efficiency and waste of materials. Summary of the Invention

[0004] The purpose of the present invention is to provide a continuous aluminum profile processing technology to solve the following technical problems:

[0005] In the continuously extruded aluminum profiles prepared by the existing technology, the welds at the joints are high-incidence areas of tensile fracture, and the plasticity, strength and toughness of the material at the transverse weld are significantly lower than those of normal profiles.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A continuous aluminum profile processing technology includes the following steps:

[0008] S1: Add Al to the furnace and heat it to a completely molten state, then continue to add modified fly ash and carry out refining;

[0009] S2: Continuously add alloying elements and completely melt them to obtain a molten liquid;

[0010] S3: Cast and mold the molten liquid, extrude, cool and quench, and straighten and temper to obtain an aluminum profile.

[0011] As a further solution of the present invention: The alloying elements include Zn, Mg, Cu, Cr, Fe, Ti, Si, Mn, Er.

[0012] As a further solution of the present invention: In S2, the alloying elements are added in the order of decreasing metal melting point.

[0013] As a further solution of the present invention: The mass percentages of aluminum and alloying elements are: Zn: 5.7 - 5.8%, Mg: 2.1 - 2.2%, Cu: 1.2 - 1.3%, Cr: 0.19 - 0.21%, Er: 0.18 - 0.21%, Fe ≤ 0.25%, Ti ≤ 0.18%, Si ≤ 0.25%, Mn ≤ 0.15%, the balance is Al, and the sum of the mass percentages of aluminum and alloying elements is 100%.

[0014] As a further solution of the present invention: The volume addition amount of modified fly ash is 15 - 25% of the total volume of the aluminum profile.

[0015] As a further solution of the present invention: The preparation method of modified fly ash includes the following steps:

[0016] A1: Immerse fly ash particles in a 5 - 10wt% hydrochloric acid solution for 1 - 3h to obtain impurity - removed fly ash;

[0017] A2: Mix Er(NO)3·5H2O, glacial acetic acid, and dimethyl ether evenly, and then continue to add acetylacetone to obtain a deposition solution;

[0018] A3: Immerse the impurity - removed fly ash in the deposition solution, filter, dry the solid, and then calcine to obtain modified fly ash.

[0019] As a further solution of the present invention: The fly ash particles are obtained by mixing fly ash with a particle size of 100 - 200um and fly ash with a particle size of 0.5 - 40um at a mass ratio of 1:1 - 2.

[0020] As a further solution of the present invention: The mass ratio of Er(NO)3·5H2O, glacial acetic acid, dimethyl ether, and acetylacetone is 1:7 - 30:7 - 30:0.35 - 3.5.

[0021] As a further solution of the present invention: The solid - liquid ratio of the impurity - removed fly ash to the deposition solution is 1g:2 - 5mL.

[0022] As a further solution of the present invention: The specific steps for calcining the solid after drying in A3 are as follows: Place it in an oven at 120 - 150 °C and dry for 0.1 - 0.5 h; then place it in a muffle furnace at 400 - 500 °C and calcine for 0.1 - 0.5 h.

[0023] Advantages of the present invention:

[0024] (1) In this application, fly ash particles are obtained by mixing two sizes of fly ash, and Er2O3 is deposited on the surface of the purified fly ash by chemical deposition method to obtain modified fly ash. The modified fly ash is added to the aluminum alloy raw material, which has the effect of refining the grains of the aluminum profile. Moreover, with the later extrusion process, the uniformity of the distribution of fly ash particles in the matrix can be effectively improved, the number of pores can be reduced, and the interfacial bonding strength can be extremely high. At the same time, the pressure is increased to refine the grains of the matrix part in the composite material.

[0025] (2) The modified fly ash added in this application has a high melting point and high impedance, which affects the arc shape and causes arc drift. It can increase the heat input to the weld per unit time, increase the weld penetration depth, refine the grains of the weld, improve the mechanical properties of the weld, and endow the weld with excellent tensile strength. Description of the drawings

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the sample selection position in the tensile strength test of the performance detection of the present invention;

[0028] Figure 2 It is a schematic diagram of the tensile specimen size in the tensile strength test of the performance detection of the present invention. Specific embodiments

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Example 1

[0031] The preparation method of the modified fly ash includes the following steps:

[0032] A1: Mix 50 g of fly ash with a particle size of 100 - 200 um and 50 g of fly ash with a particle size of 0.5 - 40 um by mass to obtain fly ash particles;

[0033] A2: Immerse 100 g of fly ash particles in a 5 wt% hydrochloric acid solution for 1 h to obtain impurity-removed fly ash;

[0034] A3: Mix 20 g of Er(NO)3·5H2O, 140 g of glacial acetic acid, and 140 g of dimethyl ether evenly, and then add 7 g of acetylacetone to obtain a deposition solution;

[0035] A4: Immerse 100 g of impurity-removed fly ash in 200 mL of the deposition solution, filter, and then place the solid in an oven at 120 °C for drying for 0.1 h; then place it in a muffle furnace at 400 °C for calcination for 0.1 h to obtain modified fly ash.

[0036] Example 2

[0037] The preparation method of modified fly ash includes the following steps:

[0038] A1: Mix 50 g of fly ash particles with a particle size of 100 - 200 μm and 50 g of fly ash particles with a particle size of 0.5 - 40 μm by mass to obtain fly ash particles;

[0039] A2: Immerse 100 g of fly ash particles in a 5 wt% hydrochloric acid solution for 1 h to obtain impurity-removed fly ash;

[0040] A3: Mix 20 g of Er(NO)3·5H2O, 200 g of glacial acetic acid, and 200 g of dimethyl ether evenly, and then add 10 g of acetylacetone to obtain a deposition solution;

[0041] A4: Immerse 100 g of impurity-removed fly ash in 300 mL of the deposition solution, filter, and then place the solid in an oven at 120 °C for drying for 0.1 h; then place it in a muffle furnace at 400 °C for calcination for 0.1 h to obtain modified fly ash.

[0042] Example 3

[0043] The preparation method of modified fly ash includes the following steps:

[0044] A1: Mix 50 g of fly ash particles with a particle size of 100 - 200 μm and 50 g of fly ash particles with a particle size of 0.5 - 40 μm by mass to obtain fly ash particles;

[0045] A2: Immerse 100 g of fly ash particles in a 5 wt% hydrochloric acid solution for 1 h to obtain impurity-removed fly ash;

[0046] A3: Mix 20 g of Er(NO)3·5H2O, 300 g of glacial acetic acid, and 300 g of dimethyl ether evenly, and then add 20 g of acetylacetone to obtain a deposition solution;

[0047] A4: Immerse 100 g of impurity-removed fly ash in 400 mL of deposition solution. After filtration, place the solid in an oven at 120 °C and dry for 0.1 h; then place it in a muffle furnace at 400 °C and calcine for 0.1 h to obtain modified fly ash.

[0048] Example 4

[0049] A continuous aluminum profile processing process includes the following steps:

[0050] S1: Weigh raw materials with the following mass percentages: Zn: 5.7%, Mg: 2.1%, Cu: 1.3%, Cr: 0.21%, Er: 0.21%, Fe: 0.05%, Ti: 0.08%, Si: 0.05%, Mn: 0.05%, Al: 90.25%;

[0051] S2: Add Al to a furnace and heat it to a completely molten state, then continue to add 15 vt% of the modified fly ash prepared in Example 1 and conduct refining;

[0052] S3: Continue to add the remaining elements in the order of decreasing metal melting point and completely melt them to obtain a molten liquid;

[0053] S4: Cast the molten liquid into shape: Continuously cast the molten aluminum alloy through a casting mold at a casting temperature of 780 °C, and forcibly cool the high-temperature solid or semi-solid aluminum alloy ingot after casting to 500 - 600 °C, then keep it warm for 1 - 8 h to obtain an aluminum alloy ingot;

[0054] S5: Extrusion: Install the heat-insulated aluminum alloy ingot on an extruder and forcibly cool it to 400 - 500 °C, then extrude a specific-shaped aluminum profile through the extruder die. The extrusion speed is 20 m / min and the pressure is 75 MPa to obtain a high-temperature profile;

[0055] S6: Cooling and quenching: Air-cool the high-temperature profile to 100 - 200 °C and quench it in water at 0 - 5 °C for 1 - 3 min to obtain a quenched profile;

[0056] S7: Straightening and tempering: Blow dry the surface moisture of the quenched profile, conduct straightening treatment at room temperature and keep it warm at 120 - 130 °C for 2 - 3 h, and then air-cool it naturally to room temperature to obtain an aluminum profile.

[0057] Example 5

[0058] A continuous aluminum profile processing process includes the following steps:

[0059] S1: Weigh the raw materials with the following mass percentages: Zn: 5.7%, Mg: 2.1%, Cu: 1.3%, Cr: 0.21%, Er: 0.21%, Fe: 0.05%, Ti: 0.08%, Si: 0.05%, Mn: 0.05%, Al: 90.25%;

[0060] S2: Add Al to the furnace and heat it to a completely molten state, then continue to add 15 vt% of the modified fly ash prepared in Example 2 and carry out refining;

[0061] S3: Continue to add the remaining elements in the order of decreasing metal melting points and completely melt them to obtain a molten liquid;

[0062] S4: Cast and shape the molten liquid: Continuously cast and shape the molten aluminum alloy through a casting mold at a casting temperature of 780 °C, and forcibly cool the high-temperature solid or semi-solid aluminum alloy ingot after casting and shaping to 500 - 600 °C, then keep it warm for 1 - 8 h to obtain an aluminum alloy ingot;

[0063] S5: Extrusion: Install the heat-insulated aluminum alloy ingot on an extruder and forcibly cool it to 400 - 500 °C, then extrude specific-shaped aluminum profiles through the extruder die at an extrusion speed of 20 m / min and a pressure of 75 MPa to obtain high-temperature profiles;

[0064] S6: Cooling and quenching: Air-cool the high-temperature profiles to 100 - 200 °C and then quench them in water at 0 - 5 °C for 1 - 3 min to obtain quenched profiles;

[0065] S7: Straightening and tempering: Blow dry the surface moisture of the quenched profiles, carry out straightening treatment at room temperature and keep them warm at 120 - 130 °C for 2 - 3 h, and then air-cool them naturally to room temperature to obtain aluminum profiles.

[0066] Example 6

[0067] A continuous aluminum profile processing process, including the following steps:

[0068] S1: Weigh the raw materials with the following mass percentages: Zn: 5.7%, Mg: 2.1%, Cu: 1.3%, Cr: 0.21%, Er: 0.21%, Fe: 0.05%, Ti: 0.08%, Si: 0.05%, Mn: 0.05%, Al: 90.25%;

[0069] S2: Add Al to the furnace and heat it to a completely molten state, then continue to add 15 vt% of the modified fly ash prepared in Example 3 and carry out refining;

[0070] S3: Continuously add the remaining elements in the order of decreasing metal melting point and completely melt them to obtain a molten liquid;

[0071] S4: Cast the molten liquid into shape: Continuously cast the molten aluminum alloy through a casting mold at a pouring temperature of 780 °C, and forcibly cool the high-temperature solid or semi-solid aluminum alloy ingot after casting to 500 - 600 °C, then keep it warm for 1 - 8 h to obtain an aluminum alloy ingot;

[0072] S5: Extrusion: Install the heat-insulated aluminum alloy ingot on an extruder and forcibly cool it to 400 - 500 °C, then extrude a specific-shaped aluminum profile through the extruder die at an extrusion speed of 20 m / min and a pressure of 75 MPa to obtain a high-temperature profile;

[0073] S6: Cooling and quenching: Air-cool the high-temperature profile to 100 - 200 °C and quench it in water at 0 - 5 °C for 1 - 3 min to obtain a quenched profile;

[0074] S7: Straightening and tempering: Blow dry the surface moisture of the quenched profile, perform straightening treatment at room temperature and keep it warm at 120 - 130 °C for 2 - 3 h, and then air-cool it naturally to room temperature to obtain an aluminum profile.

[0075] Comparative Example 1

[0076] A continuous aluminum profile processing process includes the following steps:

[0077] S1: Weigh raw materials with the following mass percentages: Zn: 5.7%, Mg: 2.1%, Cu: 1.3%, Cr: 0.21%, Er: 0.21%, Fe: 0.05%, Ti: 0.08%, Si: 0.05%, Mn: 0.05%, Al: 90.25%;

[0078] S2: Add Al to a furnace and heat it to a completely molten state for refining;

[0079] S3: Continuously add the remaining elements in the order of decreasing metal melting point and completely melt them to obtain a molten liquid;

[0080] S4: Cast the molten liquid into shape: Continuously cast the molten aluminum alloy through a casting mold at a pouring temperature of 780 °C, and forcibly cool the high-temperature solid or semi-solid aluminum alloy ingot after casting to 500 - 600 °C, then keep it warm for 1 - 8 h to obtain an aluminum alloy ingot;

[0081] S5: Extrusion: Install the heat-insulated aluminum alloy ingot on the extruder and forcibly cool it down to 400 - 500 °C, then extrude specific-shaped aluminum profiles through the extruder die. The extrusion speed is 20 m / min and the pressure is 75 MPa to obtain high-temperature profiles;

[0082] S6: Cooling and quenching: Air-cool the high-temperature profiles to 100 - 200 °C, then quench them in water at 0 - 5 °C for 1 - 3 minutes to obtain quenched profiles;

[0083] S7: Straightening and tempering: Blow dry the surface moisture of the quenched profiles, perform straightening treatment at room temperature, and keep them at 120 - 130 °C for 2 - 3 hours, then air-cool naturally to room temperature to obtain aluminum profiles.

[0084] Comparative Example 2

[0085] A continuous aluminum profile processing process includes the following steps:

[0086] S1: Weigh raw materials with the following mass percentages: Zn: 5.7%, Mg: 2.1%, Cu: 1.3%, Cr: 0.21%, Er: 0.21%, Fe: 0.05%, Ti: 0.08%, Si: 0.05%, Mn: 0.05%, Al: 90.25%;

[0087] S2: Add Al to the furnace and heat it to a completely molten state, then continue to add 15 vt% of the fly ash particles used in Example 1 for refining;

[0088] S3: Continue to add the remaining elements in the order of decreasing metal melting points and completely melt them to obtain a molten liquid;

[0089] S4: Cast the molten liquid into shape: Continuously cast the molten aluminum alloy through a casting die at a casting temperature of 780 °C, and forcibly cool the high-temperature solid or semi-solid aluminum alloy ingot after casting to 500 - 600 °C, then keep it warm for 1 - 8 hours to obtain an aluminum alloy ingot;

[0090] S5: Extrusion: Install the heat-insulated aluminum alloy ingot on the extruder and forcibly cool it down to 400 - 500 °C, then extrude specific-shaped aluminum profiles through the extruder die. The extrusion speed is 20 m / min and the pressure is 75 MPa to obtain high-temperature profiles;

[0091] S6: Cooling and quenching: Air-cool the high-temperature profiles to 100 - 200 °C, then quench them in water at 0 - 5 °C for 1 - 3 minutes to obtain quenched profiles;

[0092] S7: Straightening and tempering: Blow dry the moisture on the surface of the profiled material after quenching, perform straightening treatment at room temperature, keep it warm at 120 - 130 °C for 2 - 3 h, and air cool it naturally to room temperature to obtain the aluminum profiled material.

[0093] Comparative Example 3

[0094] A continuous aluminum profiled material processing process includes the following steps:

[0095] S1: Weigh raw materials with the following mass percentages: Zn: 5.7%, Mg: 2.1%, Cu: 1.3%, Cr: 0.21%, Er: 0.21%, Fe: 0.05%, Ti: 0.08%, Si: 0.05%, Mn: 0.05%, Al: 90.25%;

[0096] S2: Add Al to the furnace and heat it to a completely molten state, then continue to add 15 vt% fly ash with a particle size of 100 - 200 um for refining;

[0097] S3: Continue to add the remaining elements in the order of decreasing metal melting point and completely melt them to obtain a molten liquid;

[0098] S4: Cast the molten liquid into shape: Continuously cast the molten aluminum alloy through a casting mold at a casting temperature of 780 °C, and forcibly cool the high-temperature solid or semi-solid aluminum alloy ingot after casting to 500 - 600 °C, then keep it warm for 1 - 8 h to obtain the aluminum alloy ingot;

[0099] S5: Extrusion: Install the aluminum alloy ingot after heat preservation treatment on the extruder and forcibly cool it to 400 - 500 °C, then extrude a specific-shaped aluminum profiled material through the extruder die. The extrusion speed is 20 m / min and the pressure is 75 MPa to obtain a high-temperature profiled material;

[0100] S6: Cooling and quenching: Air-cool the high-temperature profiled material to 100 - 200 °C and put it into water at 0 - 5 °C for quenching. The quenching time is 1 - 3 min to obtain the quenched profiled material;

[0101] S7: Straightening and tempering: Blow dry the moisture on the surface of the profiled material after quenching, perform straightening treatment at room temperature, keep it warm at 120 - 130 °C for 2 - 3 h, and air cool it naturally to room temperature to obtain the aluminum profiled material.

[0102] Comparative Example 4

[0103] A continuous aluminum profiled material processing process includes the following steps:

[0104] S1: Weigh raw materials with the following mass percentages: Zn: 5.7%, Mg: 2.1%, Cu: 1.3%, Cr: 0.21%, Er: 0.21%, Fe: 0.05%, Ti: 0.08%, Si: 0.05%, Mn: 0.05%, Al: 90.25%;

[0105] S2: Add Al to a furnace and heat it to a fully molten state. Then continue to add 15 vt% fly ash with a particle size of 0.5 - 40 μm and conduct refining;

[0106] S3: Continue to add the remaining elements in the order of decreasing metal melting points and fully melt them to obtain a molten liquid;

[0107] S4: Cast the molten liquid into shape: Continuously cast the molten aluminum alloy through a casting mold at a casting temperature of 780 °C. Then, forcibly cool the high-temperature solid or semi-solid aluminum alloy ingot after casting to 500 - 600 °C and keep it warm for 1 - 8 h to obtain an aluminum alloy ingot;

[0108] S5: Extrusion: Install the heat-insulated aluminum alloy ingot on an extruder and forcibly cool it to 400 - 500 °C. Then, extrude specific-shaped aluminum profiles through the extruder die at an extrusion speed of 20 m / min and a pressure of 75 MPa to obtain high-temperature profiles;

[0109] S6: Cooling and quenching: Air-cool the high-temperature profiles to 100 - 200 °C and then quench them in water at 0 - 5 °C for 1 - 3 min to obtain quenched profiles;

[0110] S7: Straightening and tempering: Blow dry the surface moisture of the quenched profiles, conduct straightening treatment at room temperature, and keep them warm at 120 - 130 °C for 2 - 3 h, then naturally air-cool to room temperature to obtain aluminum profiles.

[0111] Performance testing

[0112] (1) Hardness: Measured using a digital Brinell hardness tester model 320HBS - 3000 produced by Laizhou Huayin Testing Instrument Co., Ltd. Under a load of 62.5 N, make 6 points on the surface of each specimen and take the average value as the hardness record of the material. The test results are shown in Table 1;

[0113]

[0114] As can be seen from Table 1, the aluminum profiles prepared in this application have the advantage of high hardness.

[0115] (2) Tensile strength:

[0116] Two alloys prepared in Example 4 were welded by active GTAW to obtain Specimen 4-4; two alloys prepared in Example 5 were welded by active GTAW to obtain Specimen 5-5; two alloys prepared in Example 6 were welded by active GTAW to obtain Specimen 6-6; two alloys prepared in Comparative Example 1 were welded by active GTAW to obtain Specimen 1-1; two alloys prepared in Comparative Example 2 were welded by active GTAW to obtain Specimen 2-2; two alloys prepared in Comparative Example 3 were welded by active GTAW to obtain Specimen 3-3; two alloys prepared in Comparative Example 4 were welded by active GTAW to obtain Specimen 4'-4'.

[0117] Active GTAW: welding current 150 A, tungsten electrode diameter 2.0 mm, welding speed 1.83 mm / s, arc length 3.5 mm, argon gas flow rate 6 L / mm, tungsten electrode tip angle 45°, tungsten electrode material is cerium tungsten electrode;

[0118] A microcomputer-controlled electronic universal testing machine was used. The main parameters of the universal testing machine were: maximum test force 300 KN, effective tensile space 600 mm, and main machine power supply 5 KW.

[0119] The sampling positions of the profiles were as Figure 1 shown. Five specimens were taken at the initial, middle, and late stages of the formation of the No. I transverse weld respectively. One specimen T1 was taken at the initial stage of the weld formation, at the position of 987 mm from the stop line; two specimens T2 and T3 were taken at the middle stage of the weld formation, at the positions of 1133 mm and 1394 mm from the stop line respectively; two specimens T4 and T5 were taken at the late stage of the weld formation, at the positions of 1578 mm and 1702 mm from the stop line respectively. To compare with the normal profiles, specimen T6 was taken at the normal profile. At the selected positions, materials with a shape of 18 mm×109 mm were cut from the aluminum profiles by wire cutting.

[0120] In this test, the tensile specimens were prepared according to the dimensional standards specified by the Beijing General Research Institute of Nonferrous Metals. The shape of the specimens was as Figure 2 shown. The specimen consisted of three parts: clamping, parallel, and transition. The length of the clamping part of the tensile specimen was 16 mm, and the length of the parallel part was 68 mm. To reduce the influence caused by stress concentration, the transition part was smoothly connected with an arc with a radius of 4 mm. After the specimen preparation was completed, it was placed in the microcomputer-controlled sub-universal testing machine and a tensile test was carried out. The test results are shown in Table 2;

[0121]

[0122] As can be seen from Table 2, after welding, the tensile strength of the aluminum profiles prepared in this application is excellent.

[0123] The above has described an embodiment of the present invention in detail, but the above content is only a preferred embodiment of the present invention and cannot be considered as defining the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A continuous aluminum profile processing technology, characterized in that, It includes the following steps: S1: Add Al into a furnace and heat it to a completely molten state, then continue to add modified fly ash and conduct refining; S2: Continuously add alloying elements and completely melt them to obtain a molten liquid; S3: Cast, extrude, cool and quench, and straighten and temper the molten liquid to obtain an aluminum profile; The preparation method of the modified fly ash includes the following steps: A1: Immerse fly ash particles in a 5-10wt% hydrochloric acid solution for 1-3h to obtain impurity-removed fly ash; A2: Mix Er(NO)3·5H2O, glacial acetic acid, and dimethyl ether evenly, and then continue to add acetylacetone to obtain a deposition solution; A3: Immerse the impurity-removed fly ash in the deposition solution, filter, dry the solid, and then calcine it to obtain modified fly ash.

2. The continuous aluminum profile processing technology according to claim 1, characterized in that, The alloying elements include Zn, Mg, Cu, Cr, Fe, Ti, Si, Mn, and Er.

3. A continuous aluminum profile processing process according to claim 2, characterized in that, In S2, the alloying elements are added in the order of decreasing metal melting point.

4. A continuous aluminum profile processing process according to claim 2, characterized in that, The mass percentages of aluminum and alloying elements are as follows: Zn: 5.7-5.8%, Mg: 2.1-2.2%, Cu: 1.2-1.3%, Cr: 0.19-0.21%, Er: 0.18-0.21%, Fe≤0.25%, Ti≤0.18%, Si≤0.25%, Mn≤0.15%, and the balance is Al. The sum of the mass percentages of aluminum and alloying elements is 100%.

5. A continuous aluminum profile processing process according to claim 1, characterized in that, The volume addition amount of the modified fly ash is 15-25% of the total volume of the aluminum profile.

6. A continuous aluminum profile processing process according to claim 1, characterized in that, The fly ash particles are obtained by mixing fly ash with a particle size of 100-200um and fly ash with a particle size of 0.5-4um in a mass ratio of 1:1-2.

7. A continuous aluminum profile processing process according to claim 1, characterized in that The mass ratio of Er(NO)3·5H2O, glacial acetic acid, dimethyl ether, and acetylacetone is 1:7-30:7-30:0.35-3.

5.

8. A continuous aluminum profile processing process according to claim 1, characterized in that The solid-liquid ratio of the impurity-removed fly ash to the deposition solution is 1g:2-5mL.

9. A continuous aluminum profile processing process according to claim 1, characterized in that The specific steps of drying and calcining the solid in A3 are as follows: Place it in an oven at 120-150°C and dry for 0.1-0.5h; then place it in a muffle furnace at 400-500°C and calcine for 0.1-0.5h.

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