CN112481527A - 6XXX series aluminum alloy round ingot and preparation method thereof - Google Patents
6XXX series aluminum alloy round ingot and preparation method thereof Download PDFInfo
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- CN112481527A CN112481527A CN201910865356.4A CN201910865356A CN112481527A CN 112481527 A CN112481527 A CN 112481527A CN 201910865356 A CN201910865356 A CN 201910865356A CN 112481527 A CN112481527 A CN 112481527A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- 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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
Abstract
The invention belongs to the technical field of formula and preparation of aluminum alloy materials, and discloses a 6XXX series aluminum alloy round ingot, which comprises the following components in parts by weight: si: 0.60-0.65%, Fe: less than or equal to 0.25 percent, Cu: less than or equal to 0.05 percent, Mn: less than or equal to 0.05 percent, Mg: 0.50-0.55%, Cr: less than or equal to 0.05 percent, Zn: less than or equal to 0.05 percent, Ti: less than or equal to 0.05 percent, Al and the balance. The invention also discloses a production method of the 6XXX series aluminum alloy round ingot, which comprises the following steps: feeding materials, smelting, casting and homogenizing. Compared with the prior art, the invention has the advantages that by optimizing the alloy components and adding a small amount of Mg and Si auxiliary materials during production, the aluminum alloy has smaller quenching sensitivity, the control difficulty of section deformation of the section in the production field is reduced, the quality of the section is improved, and the comprehensive performance requirement of the aluminum template for the building is met.
Description
Technical Field
The invention belongs to the technical field of formula and preparation of aluminum alloy materials, and particularly relates to a 6XXX series aluminum alloy round ingot and a preparation method thereof.
Background
Most of aluminum alloy templates used in the current building market are made of 6063 or 6061 alloy by extrusion, and the 6063 aluminum alloy has excellent processability and quenching performance, can improve the production efficiency and has low production cost, but the mechanical property of the aluminum alloy is not high; the 6061 round ingot has high alloy production cost and high quenching sensitivity, so the production process flow is complex and the production efficiency is low. Meanwhile, two aluminum alloys are produced according to the traditional process, the corrosion resistance is not high, the tensile strength and the yield strength are weak, and the performance of the materials is limited. Therefore, the problem of the quality and the cost of the aluminum construction template is solved, and in the related technology, Chinese patent application No. 201310319518.7 discloses an aluminum alloy section for the aluminum construction template, wherein the aluminum alloy comprises the following components in percentage by weight: mg: 0.85 to 0.95%, Si: 0.60 to 0.65%, Cu: 0.15-0.20%, Mn: 0.05 to 0.08%, Zr: 0.03-0.05%, Cr: 0.04-0.06%, Ti: 0.008-0.012%, Fe: 0-0.2, Zn: 0-0.10% and the balance of Al. The disadvantages of the related art are that: the cost is high, and the structure crystal grains are large.
Therefore, there is a need to provide a new 6XXX series aluminum alloy round ingot and a preparation method thereof to solve the above technical problems.
Disclosure of Invention
The invention provides a 6XXX series aluminum alloy round ingot, which comprises the following components in parts by weight:
Si：0.60～0.65％，
Fe：≤0.25％，
Cu：≤0.05％，
Mn：≤0.05％，
Mg：0.50～0.55％，
Cr：≤0.05％，
Zn：≤0.05％，
Ti：≤0.05％，
al, and the balance.
The invention also provides a production method of the 6XXX series aluminum alloy round ingot, which comprises the following steps:
s1, preparing the ingredients
The 6005 alloy is adopted, and the mass percentage of the elements is Si: 0.60-0.65%, Fe: less than or equal to 0.25%, Cu: less than or equal to 0.05 percent, Mn: less than or equal to 0.05 percent, Mg: 0.50-0.55%, Cr: less than or equal to 0.05 percent, Zn: less than or equal to 0.05 percent, Ti: less than or equal to 0.05 percent and the balance of Al.
S2, smelting
When smelting, the method sequentially comprises the following steps: charging, heating, stirring, measuring temperature, slagging-off for the 1 st time, sampling for the 1 st time, supplementing materials, refining for the 1 st time, refining for the 2 nd time, sampling for the 2 nd time and slagging-off for the 2 nd time.
And S3, casting to form a cylindrical ingot semi-finished product.
And S4, homogenizing, and homogenizing the cylindrical ingot semi-finished product.
And S5, sawing, namely sawing the cylindrical ingot semi-finished product to form a cylindrical ingot finished product.
In step S2, the temperature of the 1 st slag skimming is more than 710 ℃.
In step S2, the 1 st double-tube refining adopts a granular refining agent with the dosage of 1.0 kg/tAl; and (3) adopting a liquid refining agent in the 2 nd double-tube refining process, wherein the dosage is 0.12kg/tAl, the time is 20 +/-3 min, the temperature is 735-750 ℃, and electromagnetic stirring is started in the refining process.
The production method of the 6XXX series aluminum alloy round cast ingot further comprises a standing process after the step S2 and before the step S2, and the melt is allowed to stand for casting after 2 nd slag skimming.
In step S3, casting aluminum liquid in the furnace at a casting temperature of 725-745 ℃, at a casting speed of 40-95 mm/min, at a cooling water flow of 1900-5300L/min and at a cooling water temperature of 20-30 ℃ to form a cylindrical ingot semi-finished product with a diameter of 229-505 mm.
In step S3, before casting, the convection groove and the platform are baked, and the temperature of the convection groove is controlled at 50-100 ℃.
An in-line degassing and filtering system is used during casting.
The filtration system was a 40ppi ceramic filter plate and a 50ppi ceramic filter plate dual stage filtration.
In step S4, homogenizing the cylindrical ingot semi-finished product for 10-12 h at 540-560 ℃; in step S5, the semi-finished round ingot is sawed into a cylindrical ingot finished product of 500-6000 mm by using a circular saw and a band sawing machine.
In the stirring step in step S2, after the materials in the melting furnace are leveled, the materials are stirred by electromagnetic stirring and by a forklift.
In the 1 st slag skimming procedure in the step S2, when the temperature of the aluminum melt meets the requirement, a forklift is used for skimming the dross on the surface of the aluminum liquid in the furnace by using a special slag rake, so as to ensure that no dross is on the surface of the aluminum liquid.
In the sampling process in step S2, a sampling scoop is used to sample and detect the content of each component.
In the material supplementing process in the step S2, the ingredients are mixed according to the comparison of the content of each component obtained in the sampling process and the mass percentage of the elements, so that the content of the components meets the following requirements: si: 0.60-0.65%, Fe: less than or equal to 0.25%, Cu: less than or equal to 0.05 percent, Mn: less than or equal to 0.05 percent, Mg: 0.50-0.55%, Cr: less than or equal to 0.05 percent, Zn: less than or equal to 0.05 percent, Ti: compounding with a formula of less than or equal to 0.05 percent and the balance of Al; and (5) carrying out the next operation when the detected components are within the chemical component control standard range.
The invention has the beneficial effects that:
1. the aluminum alloy has smaller quenching sensitivity, and online air cooling quenching is adopted to replace direct water cooling when a section bar client extrudes, so that the difficulty in controlling section deformation of the section bar in a production field is greatly reduced, and the quality of the section bar is improved; so as to meet the comprehensive performance requirement of the aluminum template for the building.
2. According to the invention, a small amount of Mg and Si auxiliary materials are added during the production of the aluminum alloy, so that the production cost of the round cast ingot is greatly reduced, and the competitive advantage of enterprises is improved.
3. By optimizing the alloy components, the section prepared by the alloy has good size and surface quality, the hardness is more than 15HW, and the tensile strength Rm> 270MPa, stipulate the non-proportional tensile strength Rp0.2More than 230MPa, and the elongation after fracture is more than 8 percent, thereby meeting the comprehensive performance requirement of the aluminum template for buildings.
4. The selection of the Ti component and the content is beneficial to refining crystal grains and improving the structure performance of the product.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example 1
Si：0.60％，
Fe：0.25％，
Cu：0.05％，
Mn：0.05％，
Mg：0.52％，
Cr：0.045％，
Zn：0.047％，
Ti：0.048％，
Al, and the balance.
Example 2
Si：0.65％，
Fe：0.20％，
Cu：0.04％，
Mn：0.045％，
Mg：0.55％，
Cr：0.04％，
Zn：0.04％，
Ti：0.045％，
Al, and the balance.
Example 3
Si：0.62％，
Fe：0.15％，
Cu：0.045％，
Mn：0.04％，
Mg：0.50％，
Cr：0.05％，
Zn：0.045％，
Ti：0.05％，
Al, and the balance.
Example 4
The invention also provides a production method of the 6XXX series aluminum alloy round ingot, which comprises the following steps:
s1, preparing the ingredients
The 6005 alloy is adopted, and the mass percentage of the elements is Si: 0.60-0.65%, Fe: less than or equal to 0.25%, Cu: less than or equal to 0.05 percent, Mn: less than or equal to 0.05 percent, Mg: 0.50-0.55%, Cr: less than or equal to 0.05 percent, Zn: less than or equal to 0.05 percent, Ti: less than or equal to 0.05 percent and the balance of Al.
S2, smelting
When smelting, the method sequentially comprises the following steps: charging, heating, stirring, measuring temperature, slagging-off for the 1 st time, sampling for the 1 st time, supplementing materials, refining for the 1 st time, refining for the 2 nd time, sampling for the 2 nd time and slagging-off for the 2 nd time. And standing the melt after the 2 nd slag skimming for casting.
Wherein: the temperature of the 1 st slag skimming is more than 710 ℃. The grain refining agent is adopted in the 1 st double-pipe refining, and the dosage is 1.0 kg/tAl; and (3) adopting a liquid refining agent in the 2 nd double-tube refining process, wherein the dosage is 0.12kg/tAl, the time is 20 +/-3 min, the temperature is 735-750 ℃, and electromagnetic stirring is started in the refining process. In the stirring procedure, after materials in the smelting furnace are leveled, electromagnetic stirring is used, and meanwhile, a forklift is used for stirring; in the 1 st slag skimming procedure, when the temperature of the aluminum melt meets the requirement, a forklift is used for skimming the dross on the surface of the aluminum liquid in the furnace by using a special slag rake, so as to ensure that no dross is on the surface of the aluminum liquid; in the sampling procedure, a sampling spoon is used for sampling, and the content of each component is detected; in the material supplementing process, the ingredients are prepared according to the comparison of the content of each component obtained in the sampling process and the mass percentage of the elements, so that the content of the components meets the following requirements: si: 0.60-0.65%, Fe: less than or equal to 0.25%, Cu: less than or equal to 0.05 percent, Mn: less than or equal to 0.05 percent, Mg: 0.50-0.55%, Cr: less than or equal to 0.05 percent, Zn: less than or equal to 0.05 percent, Ti: compounding with a formula of less than or equal to 0.05 percent and the balance of Al; and (5) carrying out the next operation when the detected components are within the chemical component control standard range. The production method of the 6XXX series aluminum alloy round ingot further comprises a standing process which is positioned after the step S2 and before the step S2.
S3, casting to form a cylindrical ingot semi-finished product; wherein: and casting aluminum liquid in the furnace at the casting temperature of 725-745 ℃, at the casting speed of 40-95 mm/min, at the cooling water flow of 1900-5300L/min and at the cooling water temperature of 20-30 ℃ to form a cylindrical ingot semi-finished product with the diameter of 229-505 mm. Before casting, baking the convection groove and the platform, and controlling the temperature of the convection groove at 50-100 ℃. An in-line degassing and filtering system is used during casting. The filtration system was a 40ppi ceramic filter plate and a 50ppi ceramic filter plate dual stage filtration.
S4, homogenizing, namely homogenizing the semi-finished cylindrical ingot; wherein: homogenizing the semi-finished cylindrical ingot at 540-560 ℃ for 10-12 h; in step S5, the semi-finished round ingot is sawed into a cylindrical ingot finished product of 500-6000 mm by using a circular saw and a band sawing machine.
And S5, sawing, namely sawing the cylindrical ingot semi-finished product to form a cylindrical ingot finished product.
The invention has the beneficial effects that:
1. the aluminum alloy has smaller quenching sensitivity, and online air cooling quenching is adopted to replace direct water cooling when a section bar client extrudes, so that the difficulty in controlling section deformation of the section bar in a production field is greatly reduced, and the quality of the section bar is improved; so as to meet the comprehensive performance requirement of the aluminum template for the building.
2. According to the invention, a small amount of Mg and Si auxiliary materials are added during the production of the aluminum alloy, so that the production cost of the round cast ingot is greatly reduced, and the competitive advantage of enterprises is improved.
3. By optimizing the alloy components, the section prepared by the alloy has good size and surface quality, the hardness is more than 15HW, and the tensile strength Rm> 270MPa, stipulate the nonproportional elongation strength Rp0.2More than 230MPa, and the elongation after fracture is more than 8 percent, thereby meeting the comprehensive performance requirement of the aluminum template for buildings.
4. The selection of the Ti component and the content is beneficial to refining crystal grains and improving the structure performance of the product.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A6 XXX series aluminum alloy round ingot is characterized by comprising the following components in parts by weight:
Si：0.60～0.65％，
Fe：≤0.25％，
Cu：≤0.05％，
Mn：≤0.05％，
Mg：0.50～0.55％，
Cr：≤0.05％，
Zn：≤0.05％，
Ti：≤0.05％，
al, and the balance.
2. A production method of a 6XXX series aluminum alloy round ingot is characterized by comprising the following steps:
s1, preparing the ingredients
The 6005 alloy is adopted, and the mass percentage of the elements is Si: 0.60-0.65%, Fe: less than or equal to 0.25%, Cu: less than or equal to 0.05 percent, Mn: less than or equal to 0.05 percent, Mg: 0.50-0.55%, Cr: less than or equal to 0.05 percent, Zn: less than or equal to 0.05 percent, Ti: compounding with a formula of less than or equal to 0.05 percent and the balance of Al;
s2, smelting
When smelting, the method sequentially comprises the following steps: charging, heating, stirring, measuring temperature, slagging-off for the 1 st time, sampling for the 1 st time, supplementing materials, refining for the 1 st time, refining for the 2 nd time, sampling for the 2 nd time, and slagging-off for the 2 nd time;
s3, casting to form a cylindrical ingot semi-finished product;
and S4, homogenizing, and homogenizing the cylindrical ingot semi-finished product.
3. The method for producing the 6XXX series aluminum alloy round ingot as claimed in claim 2, wherein the temperature of the 1 st slag skimming in the step S2 is more than 710 ℃.
4. The method for producing a 6XXX series aluminum alloy round ingot according to claim 2, wherein in step S2, the 1 st double tube refining is performed by using a grain refining agent in an amount of 1.0 kg/tAl; and (3) adopting a liquid refining agent in the 2 nd double-tube refining process, wherein the dosage is 0.12kg/tAl, the time is 20 +/-3 min, the temperature is 735-750 ℃, and electromagnetic stirring is started in the refining process.
5. The method for producing a 6XXX series aluminum alloy round ingot according to claim 2, wherein the method for producing a 6XXX series aluminum alloy round ingot further comprises a standing step after step S2 and before step S2, and the melt is allowed to stand for casting after the 2 nd skimming.
6. The method for producing a 6XXX series aluminum alloy round ingot according to claim 2, wherein in step S3, the casting temperature of the molten aluminum in the furnace is 725-745 ℃, the casting speed is 40-95 mm/min, the cooling water flow is 1900-5300L/min, and the cooling water temperature is 20-30 ℃ to form a cylindrical ingot semi-finished product with the diameter of 229-505 mm.
7. The method for producing a 6XXX series aluminum alloy round ingot according to claim 6, wherein in step S3, the convection bath and the platform are baked before casting, and the temperature of the convection bath is controlled to 50-100 ℃.
8. The method of producing a 6XXX series aluminum alloy round ingot as claimed in claim 7, wherein an in-line degassing and filtering system is used during the casting process.
9. The method for producing a 6XXX series aluminum alloy round ingot as claimed in claim 8, wherein said filtration system is a 40ppi ceramic filter plate and a 50ppi ceramic filter plate dual stage filtration.
10. The method for producing a 6XXX series aluminum alloy round ingot according to claim 2, wherein in step S4, the cylindrical ingot semi-finished product is homogenized at 540-560 ℃ for 10-12 h; the production method of the 6XXX series aluminum alloy round ingot further comprises the following steps: and S5, sawing, namely sawing the semi-finished round ingot into a cylindrical ingot finished product of 500-6000 mm by using a circular saw and a band sawing machine.
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Cited By (5)
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| CN113444928A (en) * | 2021-07-20 | 2021-09-28 | 山东创新金属科技有限公司 | High-strength aluminum alloy for heavy truck hub and preparation method thereof |
| CN113604691A (en) * | 2021-07-02 | 2021-11-05 | 福建省南平铝业股份有限公司 | 6-series aluminum alloy for new energy automobile complex cavity structure and preparation method thereof |
| CN115109973A (en) * | 2022-06-29 | 2022-09-27 | 清远市钛美铝业有限公司 | High-strength light aluminum alloy and preparation method thereof |
| CN115449653A (en) * | 2022-08-11 | 2022-12-09 | 广东伟业铝厂集团有限公司 | Rail aluminum profile for industrial laser engraving equipment and preparation method thereof |
| CN115572870A (en) * | 2022-10-25 | 2023-01-06 | 祁阳宏泰铝业有限公司 | Enhanced 606X-series aluminum alloy, preparation method thereof and section processing method |
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| CN113444928A (en) * | 2021-07-20 | 2021-09-28 | 山东创新金属科技有限公司 | High-strength aluminum alloy for heavy truck hub and preparation method thereof |
| CN115109973A (en) * | 2022-06-29 | 2022-09-27 | 清远市钛美铝业有限公司 | High-strength light aluminum alloy and preparation method thereof |
| CN115449653A (en) * | 2022-08-11 | 2022-12-09 | 广东伟业铝厂集团有限公司 | Rail aluminum profile for industrial laser engraving equipment and preparation method thereof |
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