CN109628774B - Production method of medium-strength non-aging aluminum alloy round aluminum rod for electrician - Google Patents
Production method of medium-strength non-aging aluminum alloy round aluminum rod for electrician Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
- C22B9/055—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ while the metal is circulating, e.g. combined with filtration
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
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Abstract
The invention discloses a production method of a round aluminum rod for medium-strength non-aging aluminum alloy electrician, which comprises the steps of aluminum liquid alloying, aluminum alloy melt homogenization, primary purification, secondary purification and standing, grain refinement and filtration, tertiary purification and casting, rolling and the like. According to the invention, a certain content of copper, magnesium, boron and rare earth elements are added into electrolytic aluminum liquid to improve the strength of the alloy and meet the conductivity of the alloy; the production method of the invention adopts three times of purification and three times of filtration, improves the purity of the melt and ensures the quality of the original aluminum bar.
Description
Technical Field
The invention relates to the technical field of aluminum alloy, in particular to a production method of a round aluminum rod for medium-strength non-aging aluminum alloy electricians.
Background
With the rapid increase of the power demand of electric power and electric appliances, the national requirement on the power transmission amount of a power transmission line is higher and higher, but the power transmission line in China still mainly adopts an overhead steel-cored aluminum strand, and the power transmission amount of the power transmission line is greatly limited due to poor heat resistance and low conductivity of the steel-cored aluminum strand. The heat-resistant aluminum alloy electrical round rod is an important primary material of an aluminum alloy wire, and is made into the heat-resistant aluminum alloy wire after wire drawing treatment, and the heat-resistant aluminum alloy wire has excellent heat resistance and good electrical and mechanical properties. The heat-resistant aluminum alloy conductor is mainly used on newly-built high-voltage and ultrahigh-voltage overhead lines as a large-capacity wire, a large-current ground wire, a large-span wire and a large-current bus used in a transformer substation, and in addition, the heat-resistant aluminum alloy wire is also used in old overhead line transformation, so that the capacity of the line can be increased by more than 50% only by replacing the wire without changing the height of an iron tower and replacing a line corridor, thereby obtaining good technical and economic effects. However, the aluminum ore resources in China have high silicon content, are not beneficial to the production of electrical aluminum rods, and have the problems of unstable quality of the supplied products and low yield.
Disclosure of Invention
The invention aims to overcome the defects and provide a production method of a medium-strength non-aging aluminum alloy round aluminum rod for electricians.
In order to achieve the purpose, the invention is implemented according to the following technical scheme:
the production method of the round aluminum rod for the medium-strength non-aging aluminum alloy electrician comprises the following steps:
s1, alloying of aluminum liquid
Adding electrolytic aluminum liquid with the aluminum content of more than 99.5 percent into the smelting furnace, and controlling the temperature between 730 and 760 ℃; and then adding the following elements in percentage by mass to the aluminum liquid in the smelting furnace: 0.12-0.14% of copper, 0.10-0.12% of magnesium, 0.02-0.10% of boron and 0.20-0.30% of rare earth; obtaining a primary aluminum alloy melt;
s2 homogenizing aluminum alloy melt
Keeping the temperature of the smelting furnace at 730-760 ℃, stirring the primary aluminum alloy melt in the smelting furnace by using an electromagnetic stirrer for 30-40 min, and ensuring the uniform temperature of the melt in the smelting furnace and the uniform components of all alloy elements; obtaining an aluminum alloy melt;
s3, primary purification
After step S2, blowing a common refining agent to the aluminum alloy melt in the smelting furnace by using argon gas, and degassing and deslagging the melt; the usage amount of the refining agent is 1.5kg/t, and the blowing time is 10 min;
s4, secondary purification and standing
Introducing the aluminum alloy melt subjected to primary purification in the step S3 into a standing furnace, blowing a common refining agent to the uniform aluminum alloy melt in the standing furnace by using argon, and degassing and deslagging the melt; the usage amount of the refining agent is 2.0kg/t, and the blowing time is 15 min; after the blowing is finished, carrying out standing treatment on the uniform aluminum alloy melt in the standing furnace, wherein the standing time is controlled to be 20-40 min;
s5, grain refinement and filtration
Carrying out online grain refinement treatment on the aluminum alloy melt in the step S4, and then carrying out online degassing and filtering deslagging to make the components of the aluminum alloy melt more uniform; obtaining qualified aluminum alloy liquid;
s6, third purification and casting
Casting the aluminum alloy liquid obtained in the step S5, and further degassing and deslagging the melt by adopting a double-rotor degassing device in the casting process; the double-rotor degassing device adopts argon gas for degassing;
s7, rolling
Feeding the aluminum alloy cast in the step S6 into a hot rolling mill for rolling to obtain an aluminum rod;
s8, carrying out solid solution strengthening treatment on the rolled aluminum rod through an atomized quenching channel, and carrying out wire take-up packaging; and obtaining the finished round aluminum rod after the inspection is qualified.
Preferably, the copper element is obtained by adding copper wires; the magnesium element is obtained by adding magnesium ingot with the content of 99.9 percent; the boron element is obtained by adding an aluminum boron alloy with 3% of boron content; the rare earth element is obtained by adding an aluminum rare earth alloy having a rare earth content of 10%.
Preferably, the filtering process of step S5 is performed by three times of filtering to achieve the filtering effect.
Preferably, the three filtrations include a first filtration using a one-stage 1 x 1mm glass wire mesh, a second filtration using a two-stage 30ppi ceramic filter, and a third filtration using a three-stage 50ppi ceramic filter.
Preferably, the rotation speed of the rotor in the step S6 is 450r/min, and the dosage of argon is 20L/min.
The invention has the following function principle:
the invention adopts electrolytic aluminum liquid to produce directly, improves the strength by alloying elements, improves the strength by adding four elements of copper, magnesium, boron and rare earth, and simultaneously meets the conductivity of the aluminum alloy.
The invention aims at the phenomena of uneven temperature and chemical components and local overheating of the melt in the melting furnace, and the melt in the melting furnace is stirred by adopting an electromagnetic stirrer so as to ensure the uniformity of trace alloy components and the temperature of aluminum liquid.
The invention purifies the melt for three times, not only improves the purity of the melt, but also ensures the quality of the final round aluminum rod: in the first purification, before the smelting is finished and the furnace is led to a standing furnace, argon is used for blowing a common refining agent to remove gas and slag from the melt, and the degassing rate of the melt can reach about 10 percent; the second purification is that after the melt is introduced into the standing furnace, argon is adopted to blow a common refining agent to purify the melt, and the degassing rate of the melt can reach about 23 percent; the third purification is to further remove gas and slag from the melt by a double-rotor degassing device in the casting process, and the degassing rate can reach about 50 percent.
In the filtering process of step S5, the aluminum melt is filtered by three times of filtering, and 95% of oxide inclusions with the particle size of more than 10 mu and 50% of oxide inclusions with the particle size of more than 5 mu can be filtered by the three times of filtering.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, a certain content of copper, magnesium, boron and rare earth elements are added into electrolytic aluminum liquid to improve the strength of the alloy and meet the conductivity of the alloy; the production method of the invention adopts three times of purification and three times of filtration, improves the purity of the melt and ensures the quality of the original aluminum bar.
Detailed Description
The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.
Example 1
The production method of the round aluminum rod for the medium-strength non-aging aluminum alloy electrician comprises the following steps:
s1, alloying of aluminum liquid
Adding electrolytic aluminum liquid with the aluminum content of more than 99.5 percent into the smelting furnace, and controlling the temperature to be 730 ℃; and then adding the following elements in percentage by mass to the aluminum liquid in the smelting furnace: 0.12% of copper, 0.10% of magnesium, 0.08% of boron and 0.20% of rare earth; obtaining a primary aluminum alloy melt;
s2 homogenizing aluminum alloy melt
Keeping the temperature of the smelting furnace at 730 ℃, stirring the primary aluminum alloy melt in the smelting furnace by using an electromagnetic stirrer for 30min, and ensuring the uniform temperature of the melt in the smelting furnace and the uniform components of all alloy elements; obtaining an aluminum alloy melt;
s3, primary purification
After step S2, blowing a common refining agent to the aluminum alloy melt in the smelting furnace by using argon gas, and degassing and deslagging the melt; the usage amount of the refining agent is 1.5kg/t, and the blowing time is 10 min;
s4, secondary purification and standing
Introducing the aluminum alloy melt subjected to primary purification in the step S3 into a standing furnace, blowing a common refining agent to the uniform aluminum alloy melt in the standing furnace by using argon, and degassing and deslagging the melt; the usage amount of the refining agent is 2.0kg/t, and the blowing time is 15 min; after the blowing is finished, carrying out standing treatment on the uniform aluminum alloy melt in the standing furnace, wherein the standing time is controlled to be 20 min;
s5, grain refinement and filtration
Carrying out online grain refinement treatment on the aluminum alloy melt in the step S4, and then carrying out online degassing and filtering deslagging to make the components of the aluminum alloy melt more uniform; performing on-line three-time filtration, wherein the first filtration uses a first-grade 1 multiplied by 1mm glass wire mesh, the second filtration uses a second-grade 30ppi ceramic filter plate, and the third filtration uses a third-grade 50ppi ceramic filter plate; obtaining qualified aluminum alloy liquid;
s6, third purification and casting
Casting the aluminum alloy liquid obtained in the step S5, and further degassing and deslagging the melt by adopting a double-rotor degassing device in the casting process; the double-rotor degassing device adopts argon gas for degassing, the rotating speed of the rotor is 450r/min, and the using amount of the argon gas is 20L/min;
s7, rolling
Feeding the aluminum alloy cast in the step S6 into a hot rolling mill for rolling to obtain an aluminum rod;
s8, carrying out solid solution strengthening treatment on the rolled aluminum rod through an atomized quenching channel, and carrying out wire take-up packaging; and obtaining the finished round aluminum rod after the inspection is qualified.
Wherein the copper element is obtained by adding copper wires; the magnesium element is obtained by adding magnesium ingot with the content of 99.9 percent; the boron element is obtained by adding an aluminum boron alloy with 3% of boron content; the rare earth element is obtained by adding an aluminum rare earth alloy having a rare earth content of 10%.
Example 2
The production method of the round aluminum rod for the medium-strength non-aging aluminum alloy electrician comprises the following steps:
s1, alloying of aluminum liquid
Adding electrolytic aluminum liquid with the aluminum content of more than 99.5 percent into the smelting furnace, and controlling the temperature to be 760 ℃; and then adding the following elements in percentage by mass to the aluminum liquid in the smelting furnace: 0.14% of copper, 0.12% of magnesium, 0.03% of boron and 0.21% of rare earth; obtaining a primary aluminum alloy melt;
s2 homogenizing aluminum alloy melt
Keeping the temperature of the smelting furnace at 760 ℃, stirring the primary aluminum alloy melt in the smelting furnace by using an electromagnetic stirrer for 40min, and ensuring the uniform temperature of the melt in the smelting furnace and the uniform components of all alloy elements; obtaining an aluminum alloy melt;
s3, primary purification
After step S2, blowing a common refining agent to the aluminum alloy melt in the smelting furnace by using argon gas, and degassing and deslagging the melt; the usage amount of the refining agent is 1.5kg/t, and the blowing time is 10 min;
s4, secondary purification and standing
Introducing the aluminum alloy melt subjected to primary purification in the step S3 into a standing furnace, blowing a common refining agent to the uniform aluminum alloy melt in the standing furnace by using argon, and degassing and deslagging the melt; the usage amount of the refining agent is 2.0kg/t, and the blowing time is 15 min; after the blowing is finished, carrying out standing treatment on the uniform aluminum alloy melt in the standing furnace, wherein the standing time is controlled to be 40 min;
s5, grain refinement and filtration
Carrying out online grain refinement treatment on the aluminum alloy melt in the step S4, and then carrying out online degassing and filtering deslagging to make the components of the aluminum alloy melt more uniform; performing on-line three-time filtration, wherein the first filtration uses a first-grade 1 multiplied by 1mm glass wire mesh, the second filtration uses a second-grade 30ppi ceramic filter plate, and the third filtration uses a third-grade 50ppi ceramic filter plate; obtaining qualified aluminum alloy liquid;
s6, third purification and casting
Casting the aluminum alloy liquid obtained in the step S5, and further degassing and deslagging the melt by adopting a double-rotor degassing device in the casting process; the double-rotor degassing device adopts argon gas for degassing, the rotating speed of the rotor is 450r/min, and the using amount of the argon gas is 20L/min;
s7, rolling
Feeding the aluminum alloy cast in the step S6 into a hot rolling mill for rolling to obtain an aluminum rod;
s8, carrying out solid solution strengthening treatment on the rolled aluminum rod through an atomized quenching channel, and carrying out wire take-up packaging; and obtaining the finished round aluminum rod after the inspection is qualified.
Wherein the copper element is obtained by adding copper wires; the magnesium element is obtained by adding magnesium ingot with the content of 99.9 percent; the boron element is obtained by adding an aluminum boron alloy with 3% of boron content; the rare earth element is obtained by adding an aluminum rare earth alloy having a rare earth content of 10%.
Example 3
The production method of the round aluminum rod for the medium-strength non-aging aluminum alloy electrician comprises the following steps:
s1, alloying of aluminum liquid
Adding electrolytic aluminum liquid with the aluminum content of more than 99.5 percent into the smelting furnace, and controlling the temperature to be 745 ℃; and then adding the following elements in percentage by mass to the aluminum liquid in the smelting furnace: 0.12 percent of copper, 0.11 percent of magnesium, 0.02 percent of boron and 0.25 percent of rare earth; obtaining a primary aluminum alloy melt;
s2 homogenizing aluminum alloy melt
Keeping the temperature of the smelting furnace at 730-760 ℃, stirring the primary aluminum alloy melt in the smelting furnace by using an electromagnetic stirrer for 35min, and ensuring the uniform temperature of the melt in the smelting furnace and the uniform components of all alloy elements; obtaining an aluminum alloy melt;
s3, primary purification
After step S2, blowing a common refining agent to the aluminum alloy melt in the smelting furnace by using argon gas, and degassing and deslagging the melt; the usage amount of the refining agent is 1.5kg/t, and the blowing time is 10 min;
s4, secondary purification and standing
Introducing the aluminum alloy melt subjected to primary purification in the step S3 into a standing furnace, blowing a common refining agent to the uniform aluminum alloy melt in the standing furnace by using argon, and degassing and deslagging the melt; the usage amount of the refining agent is 2.0kg/t, and the blowing time is 15 min; after the blowing is finished, carrying out standing treatment on the uniform aluminum alloy melt in the standing furnace, wherein the standing time is controlled to be 30 min;
s5, grain refinement and filtration
Carrying out online grain refinement treatment on the aluminum alloy melt in the step S4, and then carrying out online degassing and filtering deslagging to make the components of the aluminum alloy melt more uniform; performing on-line three-time filtration, wherein the first filtration uses a first-grade 1 multiplied by 1mm glass wire mesh, the second filtration uses a second-grade 30ppi ceramic filter plate, and the third filtration uses a third-grade 50ppi ceramic filter plate; obtaining qualified aluminum alloy liquid;
s6, third purification and casting
Casting the aluminum alloy liquid obtained in the step S5, and further degassing and deslagging the melt by adopting a double-rotor degassing device in the casting process; the double-rotor degassing device adopts argon gas for degassing, the rotating speed of the rotor is 450r/min, and the using amount of the argon gas is 20L/min;
s7, rolling
Feeding the aluminum alloy cast in the step S6 into a hot rolling mill for rolling to obtain an aluminum rod;
s8, carrying out solid solution strengthening treatment on the rolled aluminum rod through an atomized quenching channel, and carrying out wire take-up packaging; and obtaining the finished round aluminum rod after the inspection is qualified.
Wherein the copper element is obtained by adding copper wires; the magnesium element is obtained by adding magnesium ingot with the content of 99.9 percent; the boron element is obtained by adding an aluminum boron alloy with 3% of boron content; the rare earth element is obtained by adding an aluminum rare earth alloy having a rare earth content of 10%.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (1)
1. The production method of the round aluminum rod for the medium-strength non-aging aluminum alloy electrician is characterized by comprising the following steps of: the method comprises the following steps:
s1, alloying of aluminum liquid
Adding electrolytic aluminum liquid with the aluminum content of more than 99.5 percent into the smelting furnace, and controlling the temperature between 730 and 760 ℃; and then adding the following elements in percentage by mass to the aluminum liquid in the smelting furnace: 0.12-0.14% of copper, 0.10-0.12% of magnesium, 0.02-0.10% of boron and 0.20-0.30% of rare earth; obtaining a primary aluminum alloy melt; the copper element is obtained by adding copper wires; the magnesium element is obtained by adding magnesium ingot with the content of 99.9 percent; the boron element is obtained by adding an aluminum boron alloy with 3% of boron content; the rare earth element is obtained by adding an aluminum rare earth alloy with the rare earth content of 10%;
s2 homogenizing aluminum alloy melt
Keeping the temperature of the smelting furnace at 730-760 ℃, stirring the primary aluminum alloy melt in the smelting furnace by using an electromagnetic stirrer for 30-40 min, and ensuring the uniform temperature of the melt in the smelting furnace and the uniform components of all alloy elements; obtaining an aluminum alloy melt;
s3, primary purification
After step S2, blowing a common refining agent to the aluminum alloy melt in the smelting furnace by using argon gas, and degassing and deslagging the melt; the usage amount of the refining agent is 1.5kg/t, and the blowing time is 10 min;
s4, secondary purification and standing
Introducing the aluminum alloy melt subjected to primary purification in the step S3 into a standing furnace, blowing a common refining agent to the uniform aluminum alloy melt in the standing furnace by using argon, and degassing and deslagging the melt; the usage amount of the refining agent is 2.0kg/t, and the blowing time is 15 min; after the blowing is finished, carrying out standing treatment on the uniform aluminum alloy melt in the standing furnace, wherein the standing time is controlled to be 20-40 min;
s5, grain refinement and filtration
Carrying out online grain refinement treatment on the aluminum alloy melt in the step S4, and then carrying out online degassing and filtering deslagging to make the components of the aluminum alloy melt more uniform; obtaining qualified aluminum alloy liquid;
s6, third purification and casting
Casting the aluminum alloy liquid obtained in the step S5, and further degassing and deslagging the melt by adopting a double-rotor degassing device in the casting process; the double-rotor degassing device adopts argon gas for degassing;
s7, rolling
Feeding the aluminum alloy cast in the step S6 into a hot rolling mill for rolling to obtain an aluminum rod;
s8, carrying out solid solution strengthening treatment on the rolled aluminum rod through an atomized quenching channel, and carrying out wire take-up packaging; obtaining a finished product of the round aluminum rod after the round aluminum rod is inspected to be qualified;
in the filtering process of the step S5, a filtering effect is achieved by three times of filtering; the three filtrations comprise a first filtration using a first 1X 1mm glass wire mesh, a second filtration using a second 30ppi ceramic filter, and a third filtration using a third 50ppi ceramic filter;
in the step S6, the rotating speed of the rotor is 450r/min, and the argon consumption is 20L/min.
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| CN115386771B (en) * | 2022-10-27 | 2023-01-06 | 广州致远新材料科技有限公司 | Aluminum alloy material and die casting method of barrier gate transmission structural member |
| CN115896469B (en) * | 2022-12-21 | 2024-05-14 | 广东领胜新材料科技有限公司 | Deep degassing, impurity removing and purifying method for electrical aluminum alloy liquid |
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