Production process of 6063 curtain wall decoration line aluminum profile

Abstract

The invention discloses a production process of a 6063 curtain wall decoration line aluminum profile, and belongs to the field of aluminum profile preparation. By using a compounded refining agent, the quality of a melt can be controlled, impurities and air holes are reduced, then by accurately controlling heating parameters of an aluminum bar, the internal structure of the aluminum bar is more uniform, generation of pores and cracks is reduced, and the quality of the aluminum profile is improved. And then, through control over extrusion treatment process parameters, the foaming defect caused by gas residues in the extrusion process is reduced. In addition, through precise regulation and control of technological parameters, internal structure grains are refined, and the application mechanical property of the profile is further improved. In addition, through optimization of the die, a high-temperature-resistant lubricating coating is formed on the inner wall of the die cavity, friction resistance can be remarkably reduced, the surface smoothness of the profile is indirectly improved, and then improvement of the quality of the profile, reduction of loss and improvement of the yield are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to a preparation method of an aluminum alloy material, in particular to a production process of a 6063 curtain wall decorative profiled aluminum material. BACKGROUND

[0002] The curtain wall decorative profiled aluminum material is an important component of the building facade, and needs to have the characteristics of lightweight, high strength, corrosion resistance, and beautiful surface. The 6063 aluminum alloy becomes a commonly used material for curtain wall decorative profiles due to its good extrusion performance, moderate strength, and excellent surface treatment adaptability. The main alloying elements of the 6063 aluminum alloy are magnesium and silicon, and the 6063 aluminum alloy has excellent processing performance, excellent weldability, extrusion, and plating, good corrosion resistance, toughness, easy polishing, coloring film, and excellent anodic oxidation effect, and is a typical extrusion alloy. However, in the prior art, when the 6063 curtain wall decorative profiled aluminum material is produced, due to unreasonable design of the die, the die and the extrusion cylinder are poorly centered or the die working belt is designed asymmetrically, which causes a difference in metal flow speed and causes defects such as tail shrinkage, twisting, and planar gap. For example, the hollow profile is prone to poor welding or closing problems due to improper design of the shunt die. In addition, the overall process parameter control is unstable, such as high extrusion temperature or high speed, which easily causes thermal cracks, and uneven temperature causes inconsistent cooling shrinkage, resulting in bending, twisting, or surface scratches; when the extrusion force is insufficient, the profile also has the problem of incomplete filling, affecting the dimensional accuracy.

[0003] In addition, with the increasing requirements for the performance of aluminum alloy profiles in industrial production, the current actual production of 6063 curtain wall decorative profiled aluminum material has poor extrusion forming property and insufficient strength, which is difficult to meet the requirements of wind pressure resistance and durability of high-rise building curtain walls, and therefore, the production process of the 6063 curtain wall decorative profiled aluminum material needs to be optimized to meet market demand. SUMMARY

[0004] Therefore, in order to solve one of the above problems, the present application provides a production process of a 6063 curtain wall decorative profiled aluminum material, and the specific technical scheme is as follows:

[0005] A production process of a 6063 curtain wall decorative profiled aluminum material, the production process comprising the following steps:

[0006] S1: The raw materials for preparing the 6063 curtain wall decorative profiled aluminum material are dosed according to the weight percentage, and then added to a smelting furnace for smelting treatment. After refining, slagging, online degassing, and filtering processes, casting treatment is performed to obtain an aluminum rod;

[0007] S2: The aluminum rod is heated, and the mold heating temperature is 480℃~500℃, the mold heating time is 6h~24h, the extrusion cylinder heating temperature is 400℃~420℃, and the aluminum rod loading temperature is 450℃~480℃.

[0008] S3: The aluminum rod processed in step S2 is placed in the extrusion cylinder of the extrusion press for extrusion processing. The extrusion processing parameters are as follows: the initial pressing speed of the first rod is 0.5 nm / s, the speed of the main cylinder is (1.5~1.8) nm / s, the discharge speed is (2.2~2.6) m / min, the discharge length is (20~25) m, and the residual thickness is (18~20) nm.

[0009] S4: The profile after step S3 is quenched, and the process parameters for quenching are: outlet temperature of (500~540)℃, air cooling speed controlled at 30m / s~50m / s, and the temperature after cooling ≤250℃.

[0010] S5: Straighten the profile after step S4, with a straightening rate of 0.5 to 1.5;

[0011] S6: Perform surface treatment on the profile after step S5.

[0012] Furthermore, the raw materials of the 6063 curtain wall decorative aluminum profile include the following components by weight percentage:

[0013] Si: 0.40–0.46%, Fe ≤0.23%, Mn: 0.03–0.06%, Mg: 0.50–0.56%, Cr: 0.01–0.05%, Zn: 0.01–0.04%, Ti: 0.01–0.10%, individual impurities ≤0.05%, total impurities ≤0.15%, balance Al.

[0014] Furthermore, the smelting temperature is 720℃~750℃. When the raw materials are completely melted, a refining agent is added for the first time, and refining is carried out for 10min~20min. After refining, the slag is skimmed off, and the mixture is allowed to stand for 20min~30min. A second refining agent is added, and refining is carried out for 10min~20min. After refining, the slag is skimmed off again. Online degassing uses a dual-rotor system with an argon flow rate of 3.0m³. 3 / h~5.0m 3 / h, chlorine flow rate is 0.02m³ / h. 3 / h~0.06m 3 The rotor speed is 400r / min to 500r / min, and the filtration uses a double-layer filter plate.

[0015] Furthermore, the total amount of the refining agent added accounts for 0.1% to 2% of the melt mass.

[0016] Further, the refining agent is composed of TiCl3 and KPO3 in a mass ratio of (1-5):(1-2).

[0017] Further, the inner surface of the mold needs to be pretreated.

[0018] Further, the pretreatment is to spray the high-temperature-resistant lubricating coating prepared in advance on the inner surface of the mold, and after drying, a high-temperature-resistant lubricating coating is formed on the surface of the mold; wherein the high-temperature-resistant lubricating coating comprises the following raw materials by weight: graphite 10-20 parts, hexagonal boron nitride 7-9 parts, silicon carbide 5-7 parts, zirconium dioxide 6-9 parts, and aluminum phosphate 5-9 parts.

[0019] Further, the high-temperature-resistant lubricating coating is to heat melt the raw materials of the high-temperature-resistant lubricating coating and spray them on the inner wall of the mold cavity, with a thickness of 1-3 mm.

[0020] Further, the surface treatment includes oil removal, acid etching, alkali etching, neutralization, low-temperature anodic oxidation, and sealing treatment.

[0021] Further, the low-temperature anodic oxidation forms an oxide film on the surface of the profile with a thickness of ≥10 μm.

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

[0023] 1. The use of the refining agent can control the quality of the melt, reduce impurities and pores, and through precise control of the heating parameters of the aluminum bar, the internal structure of the aluminum bar is more uniform, the generation of pores and cracks is reduced, the internal defects of the profile are improved, and through control of the extrusion process parameters, the gas residue during extrusion is reduced to reduce the blistering defects. In addition, through precise regulation of the process parameters, the internal structure grain is refined, which also helps to improve the application mechanical properties of the profile.

[0024] 2. The present application can significantly reduce the frictional resistance by forming a high-temperature-resistant lubricating coating on the inner wall of the mold cavity, indirectly improving the surface finish of the profile, thereby helping to improve the quality of the profile, reduce waste, and improve the yield. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in combination with its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the protection scope of the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] A manufacturing process for a 6063 aluminum profile for curtain wall decorative lines according to one embodiment of the present invention includes the following steps:

[0028] S1: The raw materials for preparing 6063 curtain wall decorative aluminum profiles are proportioned according to weight percentage, and then added to the melting furnace for melting. After refining, slag removal, online degassing and filtration, the aluminum rods are cast.

[0029] S2: The aluminum rod is heated, and the mold heating temperature is 480℃~500℃, the mold heating time is 6h~24h, the extrusion cylinder heating temperature is 400℃~420℃, and the aluminum rod loading temperature is 450℃~480℃.

[0030] S3: The aluminum rod processed in step S2 is placed in the extrusion cylinder of the extrusion press for extrusion processing. The extrusion processing parameters are as follows: the initial pressing speed of the first rod is 0.5 nm / s, the speed of the main cylinder is (1.5~1.8) nm / s, the discharge speed is (2.2~2.6) m / min, the discharge length is (20~25) m, and the residual thickness is (18~20) nm.

[0031] S4: The profile after step S3 is quenched, and the process parameters for quenching are: outlet temperature of (500~540)℃, air cooling speed controlled at 30m / s~50m / s, and the temperature after cooling ≤250℃.

[0032] S5: Straighten the profile after step S4, with a straightening rate of 0.5 to 1.5;

[0033] S6: Perform surface treatment on the profile after step S5.

[0034] In one embodiment, the raw material of the 6063 curtain wall decorative aluminum profile includes the following components by weight percentage:

[0035] Si: 0.40–0.46%, Fe ≤0.23%, Mn: 0.03–0.06%, Mg: 0.50–0.56%, Cr: 0.01–0.05%, Zn: 0.01–0.04%, Ti: 0.01–0.10%, individual impurities ≤0.05%, total impurities ≤0.15%, balance Al.

[0036] In one embodiment, the melting process is carried out at a temperature of 720℃~750℃. When all the raw materials have melted, a refining agent is added for the first time, and refining is performed for 10min~20min. After refining, the slag is skimmed off, and the mixture is allowed to stand for 20min~30min. A second refining agent is added, and refining is performed for 10min~20min. After refining, the slag is skimmed off again. Online degassing is performed using a dual-rotor system with an argon flow rate of 3.0m³. 3 / h~5.0m 3 / h, chlorine flow rate is 0.02m³ / h. 3 / h~0.06m 3 The rotor speed is 400r / min to 500r / min, and the filtration uses a double-layer filter plate.

[0037] In one embodiment, the total amount of the refining agent added accounts for 0.1% to 2% of the melt mass.

[0038] In one embodiment, the refining agent consists of TiCl3 and KPO3 in a mass ratio of (1-5):(1-2).

[0039] In one embodiment, the inner surface of the mold needs to be pretreated.

[0040] In one embodiment, the pretreatment is as follows: the high-temperature resistant lubricating coating prepared in advance is sprayed onto the inner surface of the mold, and after drying, a high-temperature resistant lubricating coating is formed on the surface of the mold; wherein the high-temperature resistant lubricating coating comprises the following raw materials in parts by weight: 10-20 parts graphite, 7-9 parts hexagonal boron nitride, 5-7 parts silicon carbide, 6-9 parts zirconium dioxide, and 5-9 parts aluminum phosphate.

[0041] In one embodiment, the high-temperature resistant lubricating coating is made by hot-melting the raw material of the high-temperature resistant lubricating coating and spraying it onto the inner wall of the mold cavity, with a thickness of 1mm to 3mm.

[0042] In one embodiment, the surface treatment includes degreasing, acid etching, alkali etching, neutralization, low-temperature anodizing, and pore sealing.

[0043] In one embodiment, the low-temperature anodizing results in an oxide film thickness ≥10μm formed on the profile surface.

[0044] Through process optimization, the above solution can produce 6063 aluminum profiles for curtain wall decorative lines with low loss, high yield, and excellent mechanical properties.

[0045] The implementation schemes of the present invention will now be described in detail with reference to specific embodiments.

[0046] Example 1:

[0047] The raw materials for 6063 curtain wall decorative aluminum profiles include the following components by weight percentage:

[0048] Si: 0.42%, Fe: 0.15%, Mn: 0.04%, Mg: 0.52%, Cr: 0.03%, Zn: 0.02%, Ti: 0.01%, individual impurities ≤0.05%, total impurities ≤0.15%, balance Al;

[0049] A manufacturing process for 6063 aluminum profiles used for curtain wall decorative lines, the manufacturing process comprising the following steps:

[0050] S1: The raw materials for preparing 6063 aluminum profiles for curtain wall decorative lines are batched according to weight percentage and then added to a melting furnace for melting at 740℃. When all the raw materials are melted, 0.5% of the refining agent (composed of TiCl3 and KPO3 in a mass ratio of 3:2) is added for the first time, and refining is carried out for 15 minutes. After refining, the slag is removed, and the mixture is allowed to stand for 20 minutes. Then, 1% of the refining agent (composed of TiCl3 and KPO3 in a mass ratio of 3:2) is added for the second time, and refining is carried out for 20 minutes. After refining, the slag is removed again. Online degassing is performed using a dual-rotor system with an argon flow rate of 3.0 m³ / h. 3 / h, chlorine flow rate is 0.06m 3 / h, the rotor speed is 500r / min, the filtration adopts double-layer filter plate filtration, and the casting process is used to obtain aluminum rods;

[0051] S2: The aluminum rod is heated, and the mold heating temperature is 480°C, the mold heating time is 15 hours, the extrusion cylinder heating temperature is 420°C, and the aluminum rod loading temperature is 460°C.

[0052] The inner surface of the mold needs to be pretreated. The pretreatment involves hot-melting a pre-prepared high-temperature resistant lubricating coating and spraying it onto the inner surface of the mold. After drying, a high-temperature resistant lubricating coating with a thickness of 2 mm is formed on the surface of the mold. The high-temperature resistant lubricating coating comprises the following raw materials in parts by weight: 15 parts graphite, 8 parts hexagonal boron nitride, 7 parts silicon carbide, 9 parts zirconium dioxide, and 6 parts aluminum phosphate.

[0053] S3: The aluminum rod processed in step S2 is placed in the extrusion cylinder of the extrusion press for extrusion processing. The extrusion processing parameters are: the initial pressing speed of the first rod is 0.5 nm / s, the main cylinder speed is 1.6 nm / s, the discharge speed is 2.4 m / min, the discharge length is 25 m, and the residual thickness is 20 nm.

[0054] S4: The profile after step S3 is quenched, and the quenching process parameters are: outlet temperature of 520℃, air cooling speed controlled at 40m / s, and the temperature after cooling ≤250℃.

[0055] S5: Straighten the profile after step S4, with a straightening rate of 1.5;

[0056] S6: Perform surface treatment on the profile after step S5, including degreasing, acid etching, alkali etching, neutralization, low-temperature anodizing and sealing treatment, so that the oxide film thickness formed on the profile surface is ≥10μm.

[0057] Example 2:

[0058] The raw materials for 6063 curtain wall decorative aluminum profiles include the following components by weight percentage:

[0059] Si: 0.45%, Fe: 0.16%, Mn: 0.03%, Mg: 0.53%, Cr: 0.04%, Zn: 0.02%, Ti: 0.01%, individual impurities ≤0.05%, total impurities ≤0.15%, balance Al;

[0060] A manufacturing process for 6063 aluminum profiles used for curtain wall decorative lines, the manufacturing process comprising the following steps:

[0061] S1: The raw materials for preparing 6063 aluminum profiles for curtain wall decorative lines are batched according to weight percentage and then added to a melting furnace for melting at 740℃. When all the raw materials are melted, 0.6% of the refining agent (composed of TiCl3 and KPO3 in a mass ratio of 4:1) is added for the first time, and refining is carried out for 15 minutes. After refining, slag is removed, and the mixture is allowed to stand for 20 minutes. Then, 1% of the refining agent (composed of TiCl3 and KPO3 in a mass ratio of 4:1) is added for the second time, and refining is carried out for 20 minutes. After refining, slag is removed again. Online degassing is performed using a dual-rotor system with an argon flow rate of 5.0 m³ / h. 3 / h, chlorine flow rate is 0.06m 3 / h, the rotor speed is 400r / min, the filtration adopts double-layer filter plate filtration, and the casting process is used to obtain aluminum rods;

[0062] S2: The aluminum rod is heated, and the mold heating temperature is 490°C, the mold heating time is 12 hours, the extrusion cylinder heating temperature is 400°C, and the aluminum rod loading temperature is 450°C.

[0063] The inner surface of the mold needs to be pretreated. The pretreatment involves hot-melting a pre-prepared high-temperature resistant lubricating coating and spraying it onto the inner surface of the mold. After drying, a high-temperature resistant lubricating coating with a thickness of 2 mm is formed on the surface of the mold. The high-temperature resistant lubricating coating comprises the following raw materials in parts by weight: 16 parts graphite, 7 parts hexagonal boron nitride, 6 parts silicon carbide, 8 parts zirconium dioxide, and 7 parts aluminum phosphate.

[0064] S3: The aluminum rod processed in step S2 is placed in the extrusion cylinder of the extruder for extrusion processing, and the extrusion processing parameters are: the initial pressing speed of the first rod is 0.5nm / s, the main cylinder speed is 1.8nm / s, the discharge speed is 2.4m / min, the discharge length is 25m, and the residual thickness is 20nm.

[0065] S4: The profile after step S3 is quenched, and the quenching process parameters are: outlet temperature of 520℃, air cooling speed controlled at 40m / s, and the temperature after cooling ≤250℃.

[0066] S5: Straighten the profile after step S4, with a straightening rate of 1.5;

[0067] S6: Perform surface treatment on the profile after step S5, including degreasing, acid etching, alkali etching, neutralization, low-temperature anodizing and sealing treatment, so that the oxide film thickness formed on the profile surface is ≥10μm.

[0068] Example 3:

[0069] The raw materials for 6063 curtain wall decorative aluminum profiles include the following components by weight percentage:

[0070] Si: 0.44%, Fe: 0.15%, Mn: 0.05%, Mg: 0.51%, Cr: 0.05%, Zn: 0.01-0.04%, Ti: 0.02%, individual impurities ≤0.05%, total impurities ≤0.15%, balance Al;

[0071] A manufacturing process for 6063 aluminum profiles used for curtain wall decorative lines, the manufacturing process comprising the following steps:

[0072] S1: The raw materials for preparing 6063 aluminum profiles for curtain wall decorative lines are batched according to weight percentage and then added to a melting furnace for melting at 740℃. When all the raw materials are melted, 0.8% of the refining agent (composed of TiCl3 and KPO3 in a mass ratio of 3:2) is added for the first time, and refining is carried out for 20 minutes. After refining, slag is removed, and the mixture is allowed to stand for 30 minutes. Then, 0.5% of the refining agent (composed of TiCl3 and KPO3 in a mass ratio of 3:2) is added for the second time, and refining is carried out for 15 minutes. After refining, slag is removed again. Online degassing is performed using a dual-rotor system with an argon flow rate of 4.0 m³ / h. 3 / h, chlorine flow rate is 0.06m 3 / h, the rotor speed is 500r / min, the filtration adopts double-layer filter plate filtration, and the casting process is used to obtain aluminum rods;

[0073] S2: The aluminum rod is heated, and the mold heating temperature is 500°C, the mold heating time is 12 hours, the extrusion cylinder heating temperature is 420°C, and the aluminum rod loading temperature is 460°C.

[0074] The inner surface of the mold needs to be pretreated. The pretreatment involves hot-melting a pre-prepared high-temperature resistant lubricating coating and spraying it onto the inner surface of the mold. After drying, a high-temperature resistant lubricating coating with a thickness of 2 mm is formed on the surface of the mold. The high-temperature resistant lubricating coating comprises the following raw materials in parts by weight: 18 parts graphite, 8 parts hexagonal boron nitride, 7 parts silicon carbide, 6 parts zirconium dioxide, and 8 parts aluminum phosphate.

[0075] S3: The aluminum rod processed in step S2 is placed in the extrusion cylinder of the extruder for extrusion processing, and the extrusion processing parameters are: the initial pressing speed of the first rod is 0.5nm / s, the main cylinder speed is 1.6nm / s, the discharge speed is 2.2m / min, the discharge length is 25m, and the residual thickness is 20nm.

[0076] S4: The profile after step S3 is quenched, and the quenching process parameters are: the outlet temperature is 520℃, the air speed of air cooling is controlled at 50m / s, and the temperature after cooling is ≤250℃.

[0077] S5: Straighten the profile after step S4, with a straightening rate of 1.5;

[0078] S6: Perform surface treatment on the profile after step S5, including degreasing, acid etching, alkali etching, neutralization, low-temperature anodizing and sealing treatment, so that the oxide film thickness formed on the profile surface is ≥10μm.

[0079] Comparative Example 1:

[0080] The difference between Comparative Example 1 and Example 3 is that no refining agent was added a second time in Comparative Example 1, but otherwise it is the same as Example 3.

[0081] Comparative Example 2:

[0082] The difference between Comparative Example 2 and Example 3 is that the refining agent in Comparative Example 2 is a single TiCl3, while the other aspects are the same as in Example 3.

[0083] Comparative Example 3:

[0084] The difference between Comparative Example 3 and Example 3 is that sodium chloride refining agent was used in Comparative Example 3 instead of the refining agent of this application (composed of TiCl3 and KPO3 in a mass ratio of 3:2), while the rest is the same as Example 3.

[0085] Comparative Example 4:

[0086] The difference between Comparative Example 4 and Example 3 is that the heating process parameters for the aluminum rod are different in Comparative Example 4, while the other parameters are the same as in Example 3. The heating parameters for the aluminum rod in Comparative Example 4 are: mold heating temperature of 420°C, mold heating time of 5 hours, extrusion cylinder heating temperature of 400°C, and aluminum rod loading temperature of 420°C.

[0087] Comparative Example 5:

[0088] Compared with Example 3, Comparative Example 5 differs in that the extrusion process parameters are different, while the other parameters are the same as those in Example 3. The extrusion process parameters in Comparative Example 5 are: the initial bar pressing speed is 1 nm / s, the main cylinder speed is 2.0 nm / s, the discharge speed is 3 m / min, the discharge length is 20 m, and the residual thickness is 20 nm.

[0089] Comparative Example 6:

[0090] Compared with Example 3, the mold in Comparative Example 6 was not pretreated (i.e., the high-temperature resistant lubricating coating was sprayed onto the inner surface of the mold after hot melting), but otherwise it was the same as Example 3.

[0091] I. The appearance and yield of the samples prepared by the production processes of Examples 1 to 3 and the comparative samples prepared by the production processes of Comparative Examples 1 to 5 were evaluated and recorded. The results are shown in Table 1 below.

[0092] Table 1: Appearance Evaluation and Yield

[0093]

[0094]

[0095] As can be seen from Table 1, the 6063 aluminum profile for curtain wall decorative lines produced by the manufacturing process of the present invention has high surface flatness, no peeling, no scratches, no bubbles, and no color difference, which meets the GB / T5237.5 standard and has excellent application performance. Furthermore, the production process of this invention has a high overall pass rate, which helps to reduce production losses. Specifically, compared with Example 3, Comparative Examples 1 to 3 use different refining agents, but their pass rates are not as high as Example 3. This indicates that refining and refining the melt reduces impurities, promotes internal structure uniformity, improves melt flow, reduces defects, and increases the pass rate. In Comparative Example 4, the heating parameters of the aluminum rod are different, but the pass rate is worse than Example 3. This indicates that optimizing the heating parameters of the aluminum rod can promote internal structure uniformity of the melt, improve mechanical properties, and thus reduce subsequent extrusion defects. In Comparative Example 5, the extrusion process parameters are different, but the pass rate is worse than Example 3. This indicates that optimizing the extrusion process parameters ensures complete extrusion filling, reduces the generation of porosity and cracks, improves internal defects, and increases the pass rate. In Comparative Example 6, no lubrication treatment was performed on the inside of the mold, resulting in greater friction in the mold than in Example 3. Mold pretreatment reduces mold wear and helps to improve the surface finish of the profile.

[0096] II. Mechanical properties were tested on the 6063 aluminum profiles for curtain wall decorative lines obtained by the production processes of Examples 1-3 and the comparative samples of 6063 aluminum profiles for curtain wall decorative lines obtained by the production processes of Comparative Examples 1-6. The results are shown in Table 2 below.

[0097] Table 2: Mechanical Properties

[0098] Group Yield strength / Mpa Tensile strength / Mpa Elongation at break / % Exfoliation corrosion rating Example 1 151 185 12 EA Example 2 153 186 13 EA Example 3 155 189 13 EA Comparative Example 1 112 150 10 EA Comparative Example 2 120 156 12 EA Comparative Example 3 159 175 13 EB Comparative Example 4 148 177 11 EB Comparative Example 5 139 168 10 EB Comparative Example 6 146 175 12 EA

[0099] Analysis of the data in Table 2 shows that this invention, through optimization of the production process, can obtain 6063-T5 aluminum profiles for curtain wall decorative lines with excellent mechanical properties. By controlling the quality of the melt and reducing impurities and porosity, and by precisely controlling the heating parameters of the aluminum rod, the internal structure of the aluminum rod becomes more uniform, reducing the generation of pores and cracks and improving the internal defects of the profile. Finally, by controlling the extrusion process parameters, the bubbling defects caused by residual gas during extrusion are reduced. Refining and refining can significantly improve the application mechanical properties of the profile. Furthermore, pre-treatment of the mold helps to improve the quality of the profile.

[0100] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A manufacturing process for 6063 aluminum profiles used for curtain wall decorative lines, characterized in that, The production process includes the following steps: S1: The raw materials for preparing 6063 curtain wall decorative aluminum profiles are proportioned according to weight percentage, and then added to the melting furnace for melting. After refining, slag removal, online degassing and filtration, the aluminum rods are cast. S2: The aluminum rod is heated, and the mold heating temperature is 480℃~500℃, the mold heating time is 6h~24h, the extrusion cylinder heating temperature is 400℃~420℃, and the aluminum rod loading temperature is 450℃~480℃. S3: The aluminum rod processed in step S2 is placed in the extrusion cylinder of the extrusion press for extrusion processing. The extrusion processing parameters are as follows: the initial pressing speed of the first rod is 0.5 nm / s, the speed of the main cylinder is (1.5~1.8) nm / s, the discharge speed is (2.2~2.6) m / min, the discharge length is (20~25) m, and the residual thickness is (18~20) nm. S4: The profile after step S3 is quenched, and the process parameters for quenching are: outlet temperature of (500~540)℃, air cooling speed controlled at 30m / s~50m / s, and the temperature after cooling ≤250℃. S5: Straighten the profile after step S4, with a straightening rate of 0.5 to 1.5; S6: Perform surface treatment on the profile after step S5.

2. The production process according to claim 1, characterized in that, The raw materials for the 6063 curtain wall decorative aluminum profiles include the following components by weight percentage: Si: 0.40–0.46%, Fe ≤0.23%, Mn: 0.03–0.06%, Mg: 0.50–0.56%, Cr: 0.01–0.05%, Zn: 0.01–0.04%, Ti: 0.01–0.10%, individual impurities ≤0.05%, total impurities ≤0.15%, balance Al.

3. The production process according to claim 1, characterized in that, The smelting process is carried out at a temperature of 720℃~750℃. When all the raw materials have melted, a refining agent is added for the first time, and refining is carried out for 10min~20min. After refining, the slag is skimmed off, and the mixture is allowed to stand for 20min~30min. A second refining agent is added, and refining is carried out for 10min~20min. After refining, the slag is skimmed off again. Online degassing is performed using a dual-rotor system with an argon flow rate of 3.0m³. 3 / h~5.0m 3 / h, chlorine flow rate is 0.02m³ / h. 3 / h~0.06m 3 The rotor speed is 400r / min to 500r / min, and the filtration uses a double-layer filter plate.

4. The production process according to claim 3, characterized in that, The total amount of the refining agent added accounts for 0.1% to 2% of the melt mass.

5. The production process according to claim 4, characterized in that, The refining agent is composed of TiCl3 and KPO3 in a mass ratio of (1-5):(1-2).

6. The production process according to claim 1, characterized in that, The inner surface of the mold needs to be pretreated.

7. The production process according to claim 6, characterized in that, The pretreatment is as follows: the high-temperature resistant lubricating coating prepared in advance is sprayed onto the inner surface of the mold, and after drying, a high-temperature resistant lubricating coating is formed on the surface of the mold; wherein, the high-temperature resistant lubricating coating comprises the following raw materials in parts by weight: 10-20 parts of graphite, 7-9 parts of hexagonal boron nitride, 5-7 parts of silicon carbide, 6-9 parts of zirconium dioxide, and 5-9 parts of aluminum phosphate.

8. The production process according to claim 7, characterized in that, The high-temperature resistant lubricating coating is made by hot-melting the raw material of the high-temperature resistant lubricating coating and spraying it onto the inner wall of the mold cavity, with a thickness of 1mm to 3mm.

9. The production process according to claim 1, characterized in that, The surface treatment includes degreasing, acid etching, alkali etching, neutralization, low-temperature anodizing, and pore sealing.

10. The production process according to claim 9, characterized in that, The low-temperature anodizing process results in an oxide film thickness ≥10μm on the profile surface.

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