Electric power pipe shell based on 6063 aluminum alloy and preparation method of electric power pipe shell

Abstract

The invention relates to a preparation method of an aluminum profile, in particular to a preparation method of an electric pipe shell based on 6063 aluminum alloy, which comprises the following steps: (S1) proportioning raw materials; (S2) smelting; (S3) refining and standing; (S4) filtering and casting; (S5) carrying out homogenization treatment; (S6) casting rod processing; (S7) heating the cast rod; (S8) casting rod extrusion; (S9) on-line air cooling quenching; (S10) stretching and straightening; and (S11) detecting a finished product. According to the preparation method of the electric power pipe shell based on the 6063 aluminum alloy, the electric conductivity is high.

Description

Technical Field

[0001] The invention relates to a method for preparing an aluminum alloy, and in particular to a method for preparing an electric power pipe shell based on a 6063 aluminum alloy. Background Art

[0002] With the rapid development of the power industry, the performance requirements for power pipes are getting higher and higher. Traditional power pipes are mostly made of steel, which have problems such as heavy weight and easy corrosion. Aluminum alloy pipes are gradually gaining attention due to their advantages such as light weight and strong corrosion resistance. However, the application environment of the geographical system is relatively complex, and some need to be used in harsh environments, so its use status in various environments is a key consideration. The existing pipe shell has poor corrosion resistance and a low practical life. Therefore, this material is improved accordingly. Summary of the invention

[0003] In order to overcome the deficiencies in the prior art and improve the performance of aluminum profiles, the present invention provides a method for preparing an electric power pipe shell based on 6063 aluminum alloy.

[0004] To achieve the above object, the present invention discloses a method for preparing a power pipe shell based on 6063 aluminum alloy, comprising the following steps:

[0005] (S1) Raw material ratio, wherein element Si: 0.30-0.40%, element Fe: ≤0.12%, element Cu: ≤0.02%, element Mn: ≤0.02%, element Mg: 0.48-0.58%, element Cr: ≤0.01%, element Zn: ≤0.01%, element Ti: ≤0.08%, other impurities are not more than 0.04% individually and not more than 0.14% in total, and the rest is element Al;

[0006] (S2) smelting, the raw materials with good proportions are charged into a furnace for smelting, the smelting temperature is controlled at 710-750° C., and the smelting time is 6-7 hours;

[0007] (S3) refining and standing, introducing the melt into a standing furnace, and refining it in the standing furnace with an argon-refining agent mixture for 15 to 20 minutes at a refining temperature of 720 to 740° C.;

[0008] (S4) filtration casting, casting after melt refining, casting temperature 710-730° C., casting after filtration;

[0009] (S5) homogenization treatment, homogenization treatment of the entire cast aluminum rod, homogenization temperature 560 ~ 580 ° C, heat preservation for 12 ~ 14 hours, out of the furnace air cooling, cooling time is 48 ~ 56 hours;

[0010] (S6) Cast rod processing: turning the segregation layer of the outer surface of the cast rod to 5 mm, and the surface roughness is not greater than Ra12.5;

[0011] (S7) heating the cast rods, the temperature of the cast rods being 480-510° C.;

[0012] (S8) Cast rod extrusion, filling the cast rod into the extrusion cylinder, setting the extrusion cylinder temperature to 400-450°C, the mold temperature to 480-500°C, the extrusion speed to 2m±0.5m, and the mold working zone to be controlled within 5mm;

[0013] (S9) Online air cooling quenching: after the profile is extruded from the die hole, the outlet temperature is guaranteed to be above 480°C, and the profile temperature is ≤80°C after air cooling, so that the profile is fully dissolved;

[0014] (S10) Stretch straightening, the outer diameter accuracy of the finished pipe is controlled within ±0.2mm, and the surface finish of the pipe reaches Ra0.4-0.8μm;

[0015] (S11) Finished product inspection.

[0016] Preferably, a large furnace cleaning process is required before smelting, and the aluminum liquid in the furnace is completely drained or cast dry; no less than 10kg of slag remover is sprinkled in, and then the temperature in the furnace is raised to 700°C, and then kept warm for 3-5 minutes, and the slag on the slag line, furnace wall, and furnace bottom is scraped off with a slag shovel and thoroughly cleaned out of the furnace.

[0017] Preferably, the casting process is filtered using a 50 ppi ceramic foam filter plate.

[0018] Preferably, after the cast rods are processed and passed low-magnification and high-magnification inspections, they are cut and then heated.

[0019] Preferably, the cast rods are heated by an electromagnetic induction furnace.

[0020] The present invention has the following technical effects:

[0021] 1. This alloy material has good electrical conductivity, mechanical strength and corrosion resistance. Compared with traditional iron or copper materials, it has higher performance and lower cost. It can be used for a long time under various environmental conditions without corrosion, extending the service life of the product. It is more suitable for the production of power pipe shells.

[0022] 2. The method for preparing the electric power pipe shell of the present invention is simple and efficient, and can produce high-quality electric power pipe shells quickly and in large quantities through precise extrusion molding and subsequent heat treatment processes.

[0023] 3. The prepared power pipe shell is light and high in strength, has good conductivity and corrosion resistance, and can significantly improve the safety and efficiency of the power transmission system.

[0024] 4. The recycling rate of 6063 aluminum alloy is high and its impact on the environment is small, which is in line with the current green and environmental protection development trend. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the end surface pattern of the product in Example 2;

[0027] Figure 2 The edge pattern of the end surface of the product in Example 2;

[0028] Figure 3 This is the pattern at 1 / 2 of the end surface of the product in Example 2;

[0029] Figure 4 This is the pattern at the center of the product in Example 2. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with embodiments; the examples given are only used to explain the present invention; they are not used to limit the scope of the present invention.

[0031] A method for preparing a power pipe shell based on 6063 aluminum alloy comprises the following steps:

[0032] (S1) Raw material ratio: the raw material ratio is carried out according to the following Table 1.

[0033] Table 1 The content of corresponding elements in each embodiment

[0034] Si Fe Cu Mn Mg Cr Zn Ti Al Impurities Example 1 0.3 0.12 0.02 0.02 0.58 0.01 0.01 0.08 0.9874 0.12 Example 2 0.32 0.1 0.01 0.01 0.52 0.008 0.008 0.08 0.98752 0.12 Example 3 0.4 0.09 0.01 0.01 0.48 0.008 0.008 0.08 0.98632 0.12

[0035] (S2) Smelting: Before smelting, a large furnace cleaning process is required. The aluminum liquid in the furnace is completely drained or cast dry; no less than 10kg of slag remover is sprinkled in, and then the temperature in the furnace is raised to 700℃, and then kept warm for 3-5 minutes. The slag on the slag line, furnace wall and furnace bottom is shoveled off with a slag shovel, and the slag is completely cleared out of the furnace; the raw materials with good proportions are loaded into the furnace for smelting, and the smelting temperature is controlled at 710-750℃, and the smelting time is 6-7 hours.

[0036] (S3) Refining and standing: The melt is introduced into a standing furnace, and is refined in the standing furnace using an argon gas-refining agent mixture for 15 to 20 minutes at a refining temperature of 720 to 740°C.

[0037] (S4) Filtration casting: casting is performed after melt refining, the casting temperature is 710-730° C., and a 50 ppi foam ceramic filter plate is used for filtration during the casting process, and casting is performed after filtration.

[0038] (S5) homogenization treatment: homogenization treatment is performed on the entire cast aluminum rod at a homogenization temperature of 560-580° C. for 12-14 hours, and air cooling is performed after the rod is taken out of the furnace for 48-56 hours.

[0039] (S6) Cast rod processing: the outer surface of the cast rod is turned to have a segregation layer of 5 mm, and the surface roughness is not greater than Ra12.5.

[0040] (S7) Cast rod heating: the cast rods are heated by an electromagnetic induction furnace. After the cast rods are processed and passed low-power and high-power inspections, they are cut and then heated. The temperature of the cast rods is 480-510°C.

[0041] (S8) Cast rod extrusion: fill the cast rod into the extrusion barrel, set the extrusion barrel temperature to 400-450°C, the mold temperature to 480-500°C, the extrusion speed to 2m±0.5m, and the mold working zone to be controlled within 5mm.

[0042] (S9) Online air cooling quenching: after the profile is extruded from the die hole, the outlet temperature is guaranteed to be above 480°C. The profile is cooled by bellows. After cooling, the profile temperature is ≤80°C, so that the profile is fully dissolved.

[0043] (S10) Stretch straightening, the outer diameter accuracy of the finished pipe is controlled within ±0.2mm, and the surface finish of the pipe reaches Ra0.4-0.8μm;

[0044] (S11) Finished product inspection: inspection of size, composition, performance, high magnification, low magnification and related corrosion tests.

[0045] After the preparation is completed, low-magnification detection is first performed, and the grain size is level 1. Then, performance tests are performed on the products in the above-mentioned Examples 1 to 3, as shown in Table 2.

[0046] Table 2 Product performance in each embodiment

[0047]

[0048] In actual use, the performance of the product is required to be a tensile strength of 130-170 MPa, a yield strength of 55-90 MPa, and an elongation of 15-25%. It can be seen that the products obtained in each embodiment meet the requirements.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing a power pipe shell based on 6063 aluminum alloy, characterized in that: The following steps are involved: (S1) Raw material ratio, wherein element Si: 0.30-0.40%, element Fe: ≤0.12%, element Cu: ≤0.02%, element Mn: ≤0.02%, element Mg: 0.48-0.58%, element Cr: ≤0.01%, element Zn: ≤0.01%, element Ti: ≤0.08%, other impurities are not more than 0.04% individually and not more than 0.14% in total, and the rest is element Al; (S2) smelting, the raw materials with good proportions are charged into a furnace for smelting, the smelting temperature is controlled at 710-750° C., and the smelting time is 6-7 hours; (S3) refining and standing, introducing the melt into a standing furnace, and refining it in the standing furnace with an argon-refining agent mixture for 15 to 20 minutes at a refining temperature of 720 to 740° C.; (S4) filtration casting, casting after melt refining, casting temperature 710-730° C., casting after filtration; (S5) homogenization treatment, homogenization treatment of the entire cast aluminum rod, homogenization temperature 560 ~ 580 ° C, heat preservation for 12 ~ 14 hours, out of the furnace air cooling, cooling time is 48 ~ 56 hours; (S6) Cast rod processing: turning the segregation layer of the outer surface of the cast rod to 5 mm, and the surface roughness is not greater than Ra12.5; (S7) heating the cast rods, the temperature of the cast rods being 480-510° C.; (S8) Cast rod extrusion, filling the cast rod into the extrusion cylinder, setting the extrusion cylinder temperature to 400-450°C, the mold temperature to 480-500°C, the extrusion speed to 2m±0.5m, and the mold working zone to be controlled within 5mm; (S9) Online air cooling quenching: after the profile is extruded from the die hole, the outlet temperature is guaranteed to be above 480°C, and the profile temperature is ≤80°C after air cooling, so that the profile is fully dissolved; (S10) Stretch straightening, the outer diameter accuracy of the finished pipe is controlled within ±0.2mm, and the surface finish of the pipe reaches Ra0.4-0.8μm; (S11) Finished product inspection.

2. The method for preparing a power pipe shell based on 6063 aluminum alloy according to claim 1, characterized in that: Before smelting, a large furnace cleaning process is required. The aluminum liquid in the furnace must be completely drained or cast dry; no less than 10kg of slag remover is sprinkled in, and then the temperature in the furnace is raised to 700℃, kept warm for 3-5 minutes, and the slag on the slag line, furnace wall, and furnace bottom is scraped off with a slag shovel, and completely cleared out of the furnace.

3. The method for preparing a power pipe shell based on 6063 aluminum alloy according to claim 1, characterized in that: The casting process was filtered using a 50ppi ceramic foam filter plate.

4. The method for preparing a power pipe shell based on 6063 aluminum alloy according to claim 1, characterized in that: After the casting rods are processed and passed the low-magnification and high-magnification inspections, they are cut and then heated.

5. The method for preparing a power pipe shell based on 6063 aluminum alloy according to claim 1, characterized in that: The cast rods are heated in an electromagnetic induction furnace.

6. An electric power pipe shell obtained by the preparation method according to any one of claims 1 to 5.

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