CN112662922A - Regenerated deformation aluminum alloy melt - Google Patents
Regenerated deformation aluminum alloy melt Download PDFInfo
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- CN112662922A CN112662922A CN202011446666.1A CN202011446666A CN112662922A CN 112662922 A CN112662922 A CN 112662922A CN 202011446666 A CN202011446666 A CN 202011446666A CN 112662922 A CN112662922 A CN 112662922A
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Abstract
The invention discloses a regenerated wrought aluminum alloy melt, which comprises the following components: 95 to 98 percent of 6xxx series waste aluminum, 0.8 to 1.4 percent of metal Mg, 0.6 to 1.2 percent of metal Cu, 0.1 to 0.25 percent of metal Mn, 0.2 to 0.7 percent of metal Cr, 0.3 to 0.7 percent of Al-Ti series refiner, 0.2 to 0.6 percent of Al-10Sr alterant and 0.1 to 0.4 percent of stabilizer. According to the invention, the filter residue treatment is carried out on the molten metal aluminum, the refining and purification treatment is carried out on the added metal, the purity of the mixed solution is ensured, meanwhile, the stabilizer is added into the mixed solution, the stable fusion between the solutions is ensured, and the quality and the comprehensive performance of the prepared aluminum alloy are effectively ensured.
Description
Technical Field
The invention relates to an aluminum alloy melt, in particular to a regenerated deformation aluminum alloy melt, and belongs to the technical field of aluminum alloys.
Background
Aluminum alloy is an alloy based on aluminum with a certain amount of other alloying elements added, and is one of light metal materials. In addition to the general characteristics of aluminum, aluminum alloys have certain alloy specific characteristics due to the variety and amount of alloying elements added. The aluminum alloy has the density of 2.63-2.85 g/cm, higher strength (sigma b of 110-650 MPa), specific strength close to that of high alloy steel, specific stiffness higher than that of steel, good casting performance and plastic processing performance, good electric conductivity and heat conductivity, good corrosion resistance and weldability, can be used as a structural material, and has wide application in aerospace, aviation, transportation, construction, electromechanics, lightening and daily necessities.
Aluminum alloys are further classified into wrought aluminum alloys and cast aluminum alloys according to their compositions and processing methods. The wrought aluminium alloy is prepared by smelting alloy ingredients into billet, then carrying out plastic deformation processing, and making various plastic processing products by rolling, extruding, drawing, forging and other methods, and the cast aluminium alloy is prepared by smelting the ingredients and then directly casting the mixture into blanks of various parts by sand mould, iron mould, investment mould, die casting method and the like.
In the production process of the existing cast aluminum alloy, aluminum alloy components need to be smelted and then mixed according to a certain proportion to prepare an aluminum alloy melt, but the aluminum components smelted in the preparation process of the existing aluminum alloy melt are complex, added metal is not purified, so that a mixed solution contains a large amount of impurities, and meanwhile, other metals are added into the aluminum alloy for compounding, so that the phenomenon of non-melting between metal aluminum and other metals is easy to occur, and the hardness and the comprehensive performance of the aluminum alloy are influenced.
Disclosure of Invention
The invention aims to provide a regenerated wrought aluminum alloy melt to solve the problems that the components of the aluminum alloy smelted in the preparation process of the conventional aluminum alloy melt in the background technology are complex, the aluminum alloy contains a large amount of impurities, and simultaneously, the hardness and the comprehensive performance of the aluminum alloy are influenced because the aluminum alloy is compounded by adding other metals and the aluminum alloy is easy to have an immiscible phenomenon with other metals.
In order to achieve the purpose, the invention provides the following technical scheme: the regenerated wrought aluminum alloy melt comprises the following components: 95 to 98 percent of 6xxx series waste aluminum, 0.8 to 1.4 percent of metal Mg, 0.6 to 1.2 percent of metal Cu, 0.1 to 0.25 percent of metal Mn, 0.2 to 0.7 percent of metal Cr, 0.3 to 0.7 percent of Al-Ti series refiner, 0.2 to 0.6 percent of Al-10Sr alterant and 0.1 to 0.4 percent of stabilizer.
As a preferable technical scheme of the invention, the method comprises the following steps:
s1: selecting raw materials: 96% of 6xxx series waste aluminum, 1.2% of metal Mg, 1.0% of metal Cu, 0.15% of metal Mn, 0.45% of metal Cr, 0.6% of Al-Ti series refiner, 0.4% of Al-10Sr alterant and 0.2% of stabilizer;
s2, melting 96% of 6xxx series aluminum scrap by adopting a high-temperature melting furnace at 480-540 ℃, carrying out multi-channel residue filtering treatment on the melted 6xxx series aluminum scrap solution, and standing for 30-45 min under heat preservation;
s3: melting 1.2% of metal Mg at 660-720 ℃ to prepare a metal Mg solution, melting 1.0% of metal copper Cu at 1200-1250 ℃ to prepare a metal Cu solution, melting 0.15% of metal Mn at 1300-1400 ℃ to prepare a metal Mn solution, and melting 0.45% of metal Cr at 2000-2100 ℃ to prepare a metal Cr solution;
s4: refining and purifying the metal Mg solution, the metal Cu solution, the metal Mn solution and the metal Cr solution prepared in the step S3;
s5: keeping the purified solution obtained in the step S4 at the temperature for 0.5h, sequentially adding the solution into the 6xxx series aluminum scrap solution obtained in the step S2, controlling the temperature to be 600-720 ℃ after sequentially adding the solution, stirring, sequentially adding 0.6% of Al-Ti series refiner and 0.4% of Al-Sr alterant during stirring, keeping the temperature and standing for at least 1 h;
s6: carrying out slag skimming and filtering treatment on the completely mixed solution;
s7: and (4) stirring the solution obtained in the step S6 for the second time, adding 0.2% of stabilizer in the stirring process, carrying out heat preservation treatment, and injecting the obtained regenerated wrought aluminum alloy melt into a forming die for shaping treatment.
As a preferred technical scheme of the invention, the optimal component ratio of the regenerated wrought aluminum alloy melt is as follows: 96% of 6xxx series aluminum scrap, 1.2% of metal Mg, 1.0% of metal copper Cu, 0.15% of metal Mn, 0.45% of metal Cr, 0.6% of Al-Ti series refiner, 0.4% of Al-10Sr alterant and 0.2% of stabilizer.
As a preferred technical scheme of the invention, the 0.3% -0.7% Al-Ti series refiner can be one or more of Al-Ti-5B1-A refiner, Al-Ti-5B1-B refiner and Al-Ti-5B1-C refiner.
As a preferable technical scheme of the invention, the 0.2-0.6 percent Al-10Sr alterant is formed by Al and Al4Sr, AlSr and SrNxOx.
As a preferable technical scheme of the invention, in the step S2, a CLPbD slag removing agent is added in the process of filtering the slag, wherein the CLPbD slag removing agent accounts for 0.05% of the mass of the melt.
As a preferred technical scheme of the present invention, in the step S4, the refining and purification is performed by electroslag remelting refining, and the remelting time is 2 to 3 times.
As a preferred technical solution of the present invention, the electroslag remelting comprises the following steps: the stabilizer in the step S7 may be calcium stearate or cadmium carboxylate.
(1) Transferring nonmetallic inclusions from the liquid metal film layer at the end of the electrode to a corresponding metal slag interface;
(2) non-metallic inclusions on the corresponding metal slag interface are adsorbed and dissolved by the slag;
(3) the dissolved product of the inclusion is separated from the interface of the corresponding metal slag and is diffused to the inside of the slag pool.
As a preferred embodiment of the present invention, the stabilizer in step S7 may be calcium stearate or cadmium carboxylate.
Compared with the prior art, the invention has the beneficial effects that:
according to the regenerated wrought aluminum alloy melt, the filter residue treatment is carried out on the metal aluminum liquid, meanwhile, the refining purification treatment is carried out on the added metal, the purity of the mixed solution is ensured, meanwhile, the stabilizer, the Al-Ti series refiner and the Al-10Sr alterant are added into the mixed solution, the composition space structure of the aluminum alloy is changed, the stable fusion between the solutions is ensured, and the quality and the comprehensive performance of the prepared aluminum alloy are effectively ensured.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
The invention provides a technical scheme for regenerating a wrought aluminum alloy melt, which comprises the following steps: the regenerated wrought aluminum alloy melt comprises the following components: 95 to 98 percent of 6xxx series waste aluminum, 0.8 to 1.4 percent of metal Mg, 0.6 to 1.2 percent of metal Cu, 0.1 to 0.25 percent of metal Mn, 0.2 to 0.7 percent of metal Cr, 0.3 to 0.7 percent of Al-Ti series refiner, 0.2 to 0.6 percent of Al-10Sr alterant and 0.1 to 0.4 percent of stabilizer.
Example 1: one of the methods for preparing the melt of the regenerated wrought aluminum alloy
Selecting raw materials: 96% of 6xxx series waste aluminum, 1.2% of metal Mg, 1.0% of metal Cu, 0.15% of metal Mn, 0.45% of metal Cr, 0.6% of Al-Ti series refiner, 0.4% of Al-10Sr alterant and 0.2% of stabilizer; melting 96% of 6xxx series aluminum scrap at 480-540 ℃ by adopting a high-temperature smelting furnace, carrying out multi-channel filter residue treatment on the melted 6xxx series aluminum scrap solution, preserving heat and standing for 30-45 min, melting 1.2% of metal Mg at 660-720 ℃ to prepare a metal Mg solution, melting 1.0% of metal copper Cu at 1200-1250 ℃ to prepare a metal Cu solution, melting 0.15% of metal Mn at 1300-1400 ℃ to prepare a metal Mn solution, and melting 0.45% of metal Cr at 2000-2100 ℃ to prepare a metal Cr solution; refining and purifying the prepared metal Mg solution, metal Cu solution, metal Mn solution and metal Cr solution, keeping the temperature of the purified solution for 0.5h, then sequentially adding the purified solution into 6xxx series waste aluminum solution, sequentially adding the purified solution, controlling the temperature to be 600-720 ℃ for stirring treatment, sequentially adding 0.6% of Al-Ti series refiner and 0.4% of Al-Sr alterant during stirring, keeping the temperature for at least 1h, carrying out slag skimming and filtering treatment on the completely mixed solution, carrying out secondary stirring on the treated solution, adding 0.2% of stabilizer during stirring, keeping the temperature, and injecting the obtained regenerated deforming aluminum alloy melt into a forming die for shaping treatment.
Under the condition of the treatment in the steps, different metal solutions are subjected to filter residue treatment one by one, and the added metal solution is subjected to remelting treatment, so that the purity of the added metal solution is ensured, and the hardness and comprehensive performance effects of the aluminum alloy prepared by pouring the aluminum alloy melt are ensured to be optimal.
Example 2: second method for producing a melt of an aluminum alloy for recycling wrought forms
Selecting raw materials: 95% of 6xxx series waste aluminum, 1.4% of metal Mg, 1.2% of metal copper Cu, 0.25% of metal Mn, 0.65% of metal Cr, 0.7% of Al-Ti series refiner, 0.6% of Al-10Sr alterant and 0.2% of stabilizer; melting 95% of 6xxx series aluminum scrap by adopting a high-temperature melting furnace at 480-540 ℃, preserving heat and standing for 30-45 min, melting 1.4% of metal Mg at 660-720 ℃ to prepare a metal Mg solution, melting 1.2% of metal Cu at 1200-1250 ℃ to prepare a metal Cu solution, melting 0.25% of metal Mn at 1300-1400 ℃ to prepare a metal Mn solution, and melting 0.65% of metal Cr at 2000-2100 ℃ to prepare a metal Cr solution; the method comprises the steps of preserving heat and standing prepared metal Mg solution, metal Cu solution, metal Mn solution and metal Cr solution for 0.5h, sequentially adding the metal Mg solution, the metal Cu solution, the metal Mn solution and the metal Cr solution into 6xxx series waste aluminum solution, sequentially adding the metal Mg solution, the metal Cu solution, the metal Mn solution and the metal Cr solution, controlling the temperature to be 600-720 ℃ for stirring treatment, sequentially adding 0.7% of Al-Ti series refiner and 0.6% of Al-Sr alterant during stirring, preserving heat and standing for at least 45min, carrying out slag skimming and filtering treatment on the completely mixed solution, carrying out refining and purifying treatment on the treated mixed solution, carrying out secondary stirring on the purified solution, adding 0.2% of stabilizer during stirring, preserving heat, and injecting the obtained regenerated wrought aluminum alloy melt into a forming mold for shaping treatment.
Under the condition of the treatment in the steps, the metal aluminum liquid and the added metal solution are mixed, the mixed solution is subjected to remelting treatment after filter residue is removed, the purity is poorer than that of comparative example 1, but the time for preparing the aluminum alloy melt under the condition is shorter, and the production efficiency is obviously improved.
In the description of the present invention, it is to be understood that the description is for convenience and simplicity and does not indicate or imply that the device or element referred to must be in a particular orientation, constructed and operated in the particular orientation and therefore should not be considered as limiting the invention.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
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 (9)
1. A wrought aluminum alloy melt, comprising: 95 to 98 percent of 6xxx series waste aluminum, 0.8 to 1.4 percent of metal Mg, 0.6 to 1.2 percent of metal Cu, 0.1 to 0.25 percent of metal Mn, 0.2 to 0.7 percent of metal Cr, 0.3 to 0.7 percent of Al-Ti series refiner, 0.2 to 0.6 percent of Al-10Sr alterant and 0.1 to 0.4 percent of stabilizer.
2. A treatment method of a regenerated wrought aluminum alloy melt is characterized by comprising the following steps: the method comprises the following steps:
s1: selecting raw materials: 96% of 6xxx series waste aluminum, 1.2% of metal Mg, 1.0% of metal Cu, 0.15% of metal Mn, 0.45% of metal Cr, 0.6% of Al-Ti series refiner, 0.4% of Al-10Sr alterant and 0.2% of stabilizer;
s2, melting 96% of 6xxx series aluminum scrap by adopting a high-temperature melting furnace at 480-540 ℃, carrying out multi-channel residue filtering treatment on the melted 6xxx series aluminum scrap solution, and standing for 30-45 min under heat preservation;
s3: melting 1.2% of metal Mg at 660-720 ℃ to prepare a metal Mg solution, melting 1.0% of metal copper Cu at 1200-1250 ℃ to prepare a metal Cu solution, melting 0.15% of metal Mn at 1300-1400 ℃ to prepare a metal Mn solution, and melting 0.45% of metal Cr at 2000-2100 ℃ to prepare a metal Cr solution;
s4: refining and purifying the metal Mg solution, the metal Cu solution, the metal Mn solution and the metal Cr solution prepared in the step S3;
s5: keeping the purified solution obtained in the step S4 at the temperature for 0.5h, sequentially adding the solution into the 6xxx series aluminum scrap solution obtained in the step S2, controlling the temperature to be 600-720 ℃ after sequentially adding the solution, stirring, sequentially adding 0.6% of Al-Ti series refiner and 0.4% of Al-Sr alterant during stirring, keeping the temperature and standing for at least 1 h;
s6: carrying out slag skimming and filtering treatment on the completely mixed solution;
s7: and (4) stirring the solution obtained in the step S6 for the second time, adding 0.2% of stabilizer in the stirring process, carrying out heat preservation treatment, and injecting the obtained regenerated wrought aluminum alloy melt into a forming die for shaping treatment.
3. A wrought aluminium alloy melt according to claim 1, wherein: the optimal component ratio of the regenerated wrought aluminum alloy melt is as follows: 96% of 6xxx series aluminum scrap, 1.2% of metal Mg, 1.0% of metal copper Cu, 0.15% of metal Mn, 0.45% of metal Cr, 0.6% of Al-Ti series refiner, 0.4% of Al-10Sr alterant and 0.2% of stabilizer.
4. A wrought aluminium alloy melt according to claim 1, wherein: the 0.3% -0.7% Al-Ti series refiner can be one or more of Al-Ti-5B1-A refiner, Al-Ti-5B1-B refiner and Al-Ti-5B1-C refiner.
5. A wrought aluminium alloy melt according to claim 1, wherein: the 0.2 to 0.6 percent Al-10Sr alterant is composed of Al and Al4Sr, AlSr and SrNxOx.
6. The method of claim 2, wherein the method comprises the steps of: and S2, adding a CLPbD slag-removing agent in the process of filtering the slag, wherein the CLPbD slag-removing agent accounts for 0.05% of the mass of the melt.
7. The method of claim 2, wherein the method comprises the steps of: in the step S4, the refining and purification are carried out by adopting electroslag remelting refining, and the remelting time is 2-3 times.
8. The method of claim 7, wherein the method comprises the steps of: the electroslag remelting comprises the following steps:
(1) transferring nonmetallic inclusions from the liquid metal film layer at the end of the electrode to a corresponding metal slag interface;
(2) non-metallic inclusions on the corresponding metal slag interface are adsorbed and dissolved by the slag;
(3) the dissolved product of the inclusion is separated from the interface of the corresponding metal slag and is diffused to the inside of the slag pool.
9. The method of claim 2, wherein the method comprises the steps of: the stabilizer in the step S7 may be calcium stearate or cadmium carboxylate.
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Cited By (2)
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| CN114231756A (en) * | 2021-12-20 | 2022-03-25 | 四川省有色冶金研究院有限公司 | Method for removing impurities in waste aluminum |
| CN115572854A (en) * | 2022-09-09 | 2023-01-06 | 银邦金属复合材料股份有限公司 | Aluminum alloy for spectacle case and preparation method thereof |
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Application publication date: 20210416 |