CN114807662A - Novel aluminum-magnesium-silicon alloy micro-alloying process method - Google Patents
Novel aluminum-magnesium-silicon alloy micro-alloying process method Download PDFInfo
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- CN114807662A CN114807662A CN202210384387.XA CN202210384387A CN114807662A CN 114807662 A CN114807662 A CN 114807662A CN 202210384387 A CN202210384387 A CN 202210384387A CN 114807662 A CN114807662 A CN 114807662A
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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
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
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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
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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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
- C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
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Abstract
The invention relates to the technical field of aluminum-magnesium-silicon alloy production, and discloses a novel aluminum-magnesium-silicon alloy microalloying process method, which comprises the steps of selecting an aluminum ingot with a proper size, polishing impurities on the surface of the aluminum ingot to be clean, raising the temperature of a smelting furnace to 700-750 ℃, then putting the treated aluminum ingot into the smelting furnace to be heated and melted to form molten aluminum liquid, raising the temperature of the obtained molten aluminum liquid to 1600 ℃, then adding aluminum silicate crystals into the molten aluminum liquid, continuously heating and preserving the heat for 1-1.5 h, pouring the mixed molten liquid into a mold, cooling and forming, heating the obtained aluminum-silicon alloy ingot to 400 ℃, and then hammering and forging the aluminum-silicon alloy ingot through an air hammer. According to the novel process method for microalloying the aluminum-magnesium-silicon alloy, the purity of the produced aluminum-magnesium-silicon alloy is higher through two times of refining and purification, the tensile strength, the yield strength and the elongation percentage of the aluminum-magnesium-silicon alloy are obviously improved in the using process, and the performance of the produced aluminum-magnesium-silicon alloy is more excellent.
Description
Technical Field
The invention relates to the technical field of aluminum-magnesium-silicon alloy production, in particular to a novel process method for microalloying aluminum-magnesium-silicon alloy.
Background
The Al-Mg-Si alloy is a wrought alloy which takes Al as a matrix element and takes Mg and Si as main alloy elements, and has the characteristics of good hot formability, medium strength, good weldability, corrosion resistance and the like, so the Al-Mg-Si alloy is widely used in industrial section bars and the construction industry.
In the prior art, the aluminum-magnesium-silicon alloy produced by the used process method for microalloying the aluminum-magnesium-silicon alloy has poor strength and low purity, the process is complex, and the production cost is high, so that a novel process method for microalloying the aluminum-magnesium-silicon alloy needs to be invented to solve the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a novel process method for microalloying an aluminum-magnesium-silicon alloy, which is characterized in that the purity of the produced aluminum-magnesium-silicon alloy is higher through two times of refining and purification, the tensile strength, the yield strength and the elongation percentage of the aluminum-magnesium-silicon alloy are obviously improved in the using process, the performance of the produced aluminum-magnesium-silicon alloy is more excellent, the production process is simpler, the production cost is lower, the production efficiency is improved to a certain degree, the amount of residues produced in the production process is less, and the later-stage cleaning is more convenient.
(II) technical scheme
In order to realize that the production process is simpler and the performance of the produced aluminum-magnesium-silicon alloy is more excellent, the invention provides the following technical scheme: a novel process method for microalloying aluminum-magnesium-silicon alloy comprises the following steps:
s1 heat treatment of aluminum material
Selecting an aluminum ingot with a proper size, polishing impurities on the surface of the aluminum ingot, raising the temperature of a smelting furnace to 700-750 ℃, and then putting the treated aluminum ingot into the smelting furnace to be heated and melted to form molten aluminum.
S2, adding aluminum silicate
And (4) heating the molten aluminum obtained in the step S1 to 1600 ℃, then adding aluminum silicate crystals into the molten aluminum, continuously heating and keeping the temperature for 1-1.5 h to prepare mixed molten liquid, pouring the mixed molten liquid into a mold, and cooling and forming.
S3, preliminary refining treatment
And (4) heating the aluminum-silicon alloy ingot obtained in the step (S2) to 400 ℃, and then hammering and forging the aluminum-silicon alloy ingot by an air hammer to remove impurities in the aluminum-silicon alloy ingot.
S4 scouring magnesium ingot
And (4) putting the aluminum-silicon alloy ingot in the step S3 into a smelting furnace to be heated into molten liquid, pouring the molten liquid into a launder to wash the magnesium ingot, then refluxing the washed molten liquid into the smelting furnace again, repeating the steps for 2-4 times to obtain aluminum-magnesium-silicon alloy molten liquid, and continuously heating and preserving the heat of the aluminum-magnesium-silicon alloy molten liquid for 1-1.5 hours.
S5, cooling refining treatment
Pouring the aluminum magnesium silicon alloy molten liquid obtained in the step S4 into a mold, solidifying and forming to obtain an aluminum magnesium silicon alloy ingot, then reheating the aluminum magnesium silicon alloy ingot to 500 ℃, removing impurities from the high-temperature aluminum magnesium silicon alloy ingot through air hammer forging, and finally cooling the aluminum magnesium silicon alloy ingot after removing the impurities to room temperature.
S6, finished product detection
The aluminum-magnesium-silicon alloy ingot obtained in step S5 was examined for tensile strength, yield strength, and elongation.
Preferably, in step S1, the purity of the aluminum ingot used is required to be greater than 99%, and before the aluminum ingot is smelted, the temperature of the smelting furnace needs to be raised in advance and kept for 10 min.
Preferably, in the step S2, the purity of the aluminum silicate crystals used is required to be greater than 99%, and during the heating and heat preservation process, nitrogen with the purity greater than 99.5% needs to be continuously introduced into the smelting furnace.
Preferably, in step S3, the purity of the aluminum-silicon alloy ingot after being removed is required to be higher than 90%, and the temperature of the aluminum-silicon alloy ingot is required to be maintained at not lower than 350 ℃ during the forging process.
Preferably, in the step S4, during the continuous heating and heat preservation of the molten liquid of the aluminum-magnesium-silicon alloy, a refining agent needs to be added into the molten liquid of the aluminum-magnesium-silicon alloy, and nitrogen with a purity of more than 99.5% needs to be continuously introduced.
Preferably, in step S5, the refined almgsi ingot is required to have a purity of more than 99%, and the temperature of the almgsi ingot is required to be maintained at a temperature of not lower than 400 ℃ during the forging process.
Preferably, in step S6, the tensile strength is measured by a tensile strength tester, the yield strength is measured by a yield strength tester, and the elongation is measured by an elongation tester.
(III) advantageous effects
Compared with the prior art, the invention provides a novel process method for microalloying the aluminum-magnesium-silicon alloy, which has the following beneficial effects:
1. according to the novel process method for microalloying the aluminum-magnesium-silicon alloy, the purity of the produced aluminum-magnesium-silicon alloy is higher through two times of refining and purification, the tensile strength, the yield strength and the elongation percentage of the aluminum-magnesium-silicon alloy are obviously improved in the using process, and the performance of the produced aluminum-magnesium-silicon alloy is more excellent.
2. The novel aluminum-magnesium-silicon alloy micro-alloying process method is simpler in production process, lower in production cost, and capable of improving production efficiency to a certain extent, less in residue produced in the production process, and more convenient to clean in the later period.
Drawings
FIG. 1 is a schematic view of the process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1, the present invention provides a technical solution: a novel process method for microalloying aluminum-magnesium-silicon alloy comprises the following steps:
s1 heat treatment of aluminum material
Selecting an aluminum ingot with a proper size, polishing impurities on the surface of the aluminum ingot with the purity of more than 99%, raising the temperature of a smelting furnace to 700 ℃, preserving the temperature for 10min, and then putting the treated aluminum ingot into the smelting furnace to be heated and melted to form molten aluminum liquid.
S2, adding aluminum silicate
Heating the molten aluminum obtained in the step S1 to 1600 ℃, then adding aluminum silicate crystals with the purity of more than 99%, continuously heating and preserving heat for 1h, continuously introducing nitrogen with the purity of more than 99.5% into a smelting furnace, preparing mixed molten liquid, pouring the mixed molten liquid into a mold, and cooling and forming.
S3, preliminary refining treatment
And heating the aluminum-silicon alloy ingot obtained in the step S2 to 400 ℃, and then hammering and forging the aluminum-silicon alloy ingot with the temperature not lower than 350 ℃ by using an air hammer to remove impurities in the aluminum-silicon alloy ingot until the purity of the aluminum-silicon alloy ingot is more than 90%.
S4 scouring magnesium ingot
And (4) putting the aluminum-silicon alloy ingot in the step S3 into a smelting furnace, heating the aluminum-silicon alloy ingot into molten liquid, pouring the molten liquid into a launder to wash the magnesium ingot, then refluxing the washed molten liquid into the smelting furnace again, repeating the step 2 times to obtain aluminum-magnesium-silicon alloy molten liquid, continuously heating the aluminum-magnesium-silicon alloy molten liquid, keeping the temperature for 1h, adding a refining agent into the aluminum-magnesium-silicon alloy molten liquid, and continuously introducing nitrogen with the purity of more than 99.5%.
S5 Cooling refining treatment
Pouring the aluminum magnesium silicon alloy molten liquid obtained in the step S4 into a mold, solidifying and forming to obtain an aluminum magnesium silicon alloy ingot, then reheating the aluminum magnesium silicon alloy ingot to 500 ℃, forging the aluminum magnesium silicon alloy ingot with the temperature not lower than 400 ℃ by an air hammer to remove impurities until the purity of the aluminum magnesium silicon alloy ingot is higher than 99%, and finally cooling the aluminum magnesium silicon alloy ingot after impurity removal to room temperature.
S6, finished product detection
And (4) detecting the tensile strength, the yield strength and the elongation of the aluminum-magnesium-silicon alloy ingot obtained in the step (S5), detecting the tensile strength to be 220MPa by using a tensile strength testing machine, detecting the yield strength to be 205MPa by using a yield strength testing machine, and detecting the elongation to be 9.7% by using an elongation testing machine.
Example 2:
referring to fig. 1, the present invention provides a technical solution: a novel process method for microalloying aluminum magnesium silicon alloy comprises the following steps:
s1 heat treatment of aluminum material
Selecting an aluminum ingot with a proper size, polishing impurities on the surface of the aluminum ingot with the purity of more than 99%, raising the temperature of a smelting furnace to 730 ℃, preserving the temperature for 10min, and then putting the treated aluminum ingot into the smelting furnace to be heated and melted to form molten aluminum liquid.
S2, adding aluminum silicate
Heating the molten aluminum obtained in the step S1 to 1600 ℃, then adding aluminum silicate crystals with the purity of more than 99%, continuously heating and preserving heat for 1.25h, continuously introducing nitrogen with the purity of more than 99.5% into a smelting furnace, preparing mixed molten liquid, pouring the mixed molten liquid into a mold, and cooling and forming.
S3, preliminary refining treatment
And (4) heating the aluminum-silicon alloy ingot obtained in the step (S2) to 400 ℃, hammering and forging the aluminum-silicon alloy ingot with the temperature not lower than 350 ℃ by using an air hammer, and removing impurities in the aluminum-silicon alloy ingot until the purity of the aluminum-silicon alloy ingot is higher than 90%.
S4 scouring magnesium ingot
And (4) putting the aluminum-silicon alloy ingot in the step S3 into a smelting furnace, heating the aluminum-silicon alloy ingot into molten liquid, pouring the molten liquid into a launder to wash the magnesium ingot, then refluxing the washed molten liquid into the smelting furnace again, repeating the steps for 3 times to obtain aluminum-magnesium-silicon alloy molten liquid, continuously heating the aluminum-magnesium-silicon alloy molten liquid, keeping the temperature for 1.25h, adding a refining agent into the aluminum-magnesium-silicon alloy molten liquid, and continuously introducing nitrogen with the purity of more than 99.5%.
S5 Cooling refining treatment
Pouring the aluminum magnesium silicon alloy molten liquid obtained in the step S4 into a mold, solidifying and forming to obtain an aluminum magnesium silicon alloy ingot, then reheating the aluminum magnesium silicon alloy ingot to 500 ℃, forging the aluminum magnesium silicon alloy ingot with the temperature not lower than 400 ℃ by an air hammer to remove impurities until the purity of the aluminum magnesium silicon alloy ingot is higher than 99%, and finally cooling the aluminum magnesium silicon alloy ingot after impurity removal to room temperature.
S6, finished product detection
And (4) detecting the tensile strength, the yield strength and the elongation of the aluminum-magnesium-silicon alloy ingot obtained in the step (S5), wherein the tensile strength is detected to be 228MPa by using a tensile strength tester, the yield strength is detected to be 208MPa by using a yield strength tester, and the elongation is detected to be 9.9% by using an elongation tester.
Example 3:
referring to fig. 1, the present invention provides a technical solution: a novel process method for microalloying aluminum-magnesium-silicon alloy comprises the following steps:
s1 heat treatment of aluminum material
Selecting an aluminum ingot with a proper size, polishing impurities on the surface of the aluminum ingot with the purity of more than 99%, raising the temperature of a smelting furnace to 750 ℃, preserving the temperature for 10min, and then putting the treated aluminum ingot into the smelting furnace to be heated and melted to form molten aluminum liquid.
S2, adding aluminum silicate
Heating the molten aluminum obtained in the step S1 to 1600 ℃, then adding aluminum silicate crystals with the purity of more than 99%, continuously heating and preserving heat for 1.5h, continuously introducing nitrogen with the purity of more than 99.5% into a smelting furnace, preparing mixed molten liquid, pouring the mixed molten liquid into a mold, and cooling and forming.
S3, preliminary refining treatment
And (4) heating the aluminum-silicon alloy ingot obtained in the step (S2) to 400 ℃, hammering and forging the aluminum-silicon alloy ingot with the temperature not lower than 350 ℃ by using an air hammer, and removing impurities in the aluminum-silicon alloy ingot until the purity of the aluminum-silicon alloy ingot is higher than 90%.
S4 scouring magnesium ingot
And (4) putting the aluminum-silicon alloy ingot in the step S3 into a smelting furnace, heating the aluminum-silicon alloy ingot into molten liquid, pouring the molten liquid into a launder to wash the magnesium ingot, then refluxing the washed molten liquid into the smelting furnace again, repeating the step 4 times to obtain aluminum-magnesium-silicon alloy molten liquid, continuously heating the aluminum-magnesium-silicon alloy molten liquid, keeping the temperature for 1.5 hours, adding a refining agent into the aluminum-magnesium-silicon alloy molten liquid, and continuously introducing nitrogen with the purity of more than 99.5%.
S5 Cooling refining treatment
Pouring the aluminum magnesium silicon alloy molten liquid obtained in the step S4 into a mold, solidifying and forming to obtain an aluminum magnesium silicon alloy ingot, then reheating the aluminum magnesium silicon alloy ingot to 500 ℃, forging the aluminum magnesium silicon alloy ingot with the temperature not lower than 400 ℃ by an air hammer to remove impurities until the purity of the aluminum magnesium silicon alloy ingot is higher than 99%, and finally cooling the aluminum magnesium silicon alloy ingot after impurity removal to room temperature.
S6, finished product detection
And (4) detecting the tensile strength, the yield strength and the elongation of the aluminum-magnesium-silicon alloy ingot obtained in the step (S5), wherein the tensile strength is detected to be 215MPa by using a tensile strength testing machine, the yield strength is detected to be 198MPa by using a yield strength testing machine, and the elongation is detected to be 9.6% by using an elongation testing machine.
This novel aluminum magnesium silicon alloy microalloying's process method, through refining purification twice for the aluminum magnesium silicon alloy purity of producing is higher, in the use, its tensile strength, yield strength and percentage elongation all have showing and promote, make the aluminum magnesium silicon alloy performance of producing more superior, the production process is simpler, manufacturing cost is lower, and improved production efficiency to a certain extent, and the slag volume that produces in process of production still less, it is more convenient that the later stage clearance.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A novel process method for microalloying aluminum-magnesium-silicon alloy is characterized by comprising the following steps:
s1 heat treatment of aluminum material
Selecting an aluminum ingot with a proper size, polishing impurities on the surface of the aluminum ingot, raising the temperature of a smelting furnace to 700-750 ℃, and then putting the treated aluminum ingot into the smelting furnace to be heated and melted to form molten aluminum liquid;
s2, adding aluminum silicate
Heating the molten aluminum obtained in the step S1 to 1600 ℃, then adding aluminum silicate crystals into the molten aluminum, continuously heating and keeping the temperature for 1-1.5 hours to prepare mixed molten liquid, pouring the mixed molten liquid into a mold, and cooling and forming;
s3, preliminary refining treatment
Heating the aluminum-silicon alloy ingot obtained in the step S2 to 400 ℃, and then hammering and forging the aluminum-silicon alloy ingot by an air hammer to remove impurities in the aluminum-silicon alloy ingot;
s4 scouring magnesium ingot
Putting the aluminum-silicon alloy ingot in the step S3 into a smelting furnace to be heated into molten liquid, pouring the molten liquid into a launder to wash the magnesium ingot, then refluxing the washed molten liquid into the smelting furnace again, repeating the steps for 2-4 times to obtain aluminum-magnesium-silicon alloy molten liquid, and continuously heating and preserving the heat of the aluminum-magnesium-silicon alloy molten liquid for 1-1.5 hours;
s5 Cooling refining treatment
Pouring the aluminum-magnesium-silicon alloy molten liquid obtained in the step S4 into a mold, solidifying and forming to obtain an aluminum-magnesium-silicon alloy ingot, then reheating the aluminum-magnesium-silicon alloy ingot to 500 ℃, removing impurities of the high-temperature aluminum-magnesium-silicon alloy ingot through air hammer forging, and finally cooling the aluminum-magnesium-silicon alloy ingot after impurity removal to room temperature;
s6, finished product detection
The ingot of al-mg-si alloy obtained in step S5 was examined for tensile strength, yield strength, and elongation.
2. The novel process of microalloying Al-Mg-Si alloy in accordance with claim 1, wherein in step S1, the purity of the used Al ingot is required to be higher than 99%, and the temperature of the Al ingot is increased and maintained for 10min before smelting.
3. The new aluminum magnesium silicon alloy micro-alloying process as claimed in claim 1, wherein in step S2, the purity of the aluminum silicate used is required to be more than 99%, and during the heating and maintaining process, nitrogen with purity more than 99.5% needs to be continuously introduced into the smelting furnace.
4. The process of claim 1, wherein in step S3, the purity of the aluminum-silicon alloy ingot after being removed is required to be greater than 90%, and the temperature of the aluminum-silicon alloy ingot during forging is required to be maintained at no lower than 350 ℃.
5. The process of claim 1, wherein in step S4, during the continuous heating and maintaining of the al-mg-si alloy melt, a refining agent is added to the al-mg-si alloy melt, and nitrogen with a purity greater than 99.5% is continuously introduced.
6. The process of claim 1, wherein in step S5, the refined Al-Mg-Si alloy ingot has a purity of more than 99%, and the temperature of the Al-Mg-Si alloy ingot is not lower than 400 ℃ during forging.
7. The novel process of microalloying Al-Mg-Si alloy in accordance with claim 1, wherein in step S6, the tensile strength is measured by tensile strength tester, the yield strength is measured by yield strength tester, and the elongation is measured by elongation tester.
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