CN113106309A - Preparation method of aluminum alloy and aluminum alloy section - Google Patents
Preparation method of aluminum alloy and aluminum alloy section Download PDFInfo
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- CN113106309A CN113106309A CN202110417681.1A CN202110417681A CN113106309A CN 113106309 A CN113106309 A CN 113106309A CN 202110417681 A CN202110417681 A CN 202110417681A CN 113106309 A CN113106309 A CN 113106309A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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
- 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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- 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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- 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- 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
- C22F1/047—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 magnesium as the next major constituent
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Abstract
The application relates to the technical field of alloys, and provides a preparation method of an aluminum alloy and an aluminum alloy profile. The aluminum alloy comprises the following element components in percentage by weight, based on the total weight of the aluminum alloy as 100 percent: mg: 1.00-1.10%, Si: 0.68-0.78%, Fe: 0.34-0.40%, Cu: 0.30-0.40%, Mn: 0.08-0.18%, Cr: 0.06-0.16%, Ti: 0.06-0.16%, V: 0.05-0.15%, Zn: less than or equal to 0.2 percent and the balance of Al. The aluminum alloy mainly comprises Mg, Si, Fe, Cu, Mn, Ti, Cr and V alloy elements with specific contents, and the aluminum alloy formed by the elements in proportion has the advantages of ultrahigh strength, good extrudability, processability and the like.
Description
Technical Field
The application belongs to the technical field of alloys, and particularly relates to an aluminum alloy and a preparation method of an aluminum alloy profile.
Background
With the stricter and stricter environmental protection standards in the world, the light weight of the automobile becomes the development trend in the future, and the weight of the automobile is reduced, so that the automobile is a necessary choice for realizing energy conservation and emission reduction in the traffic field. Aluminum alloys not only have high strength and are easy to process, but also have the advantages of light weight (about 1/3 of the weight of steel), and the like, so that the trend of replacing steel with aluminum is an economic development trend. No matter the vehicle is a rail vehicle or an automobile, the aluminum vehicle body is popularized to achieve light weight of the vehicle, and the win-win situation of energy conservation, emission reduction and economic benefit in the transportation industry can be realized.
The new anti-lock brake safety valve body has the main function of preventing wheels of a vehicle from locking (stopping rolling) in the braking process, so that a driver can control the direction when braking, and the novel anti-lock brake safety valve body works with a traditional braking system and is a safe and effective braking auxiliary system. The novel anti-lock braking safety valve body is made of aluminum alloy materials, and only a few domestic enterprises can produce the materials at present. In the actual production process, a 6061 aluminum alloy is generally adopted to produce and process the novel anti-lock brake safety valve body, the maximum tensile strength (Rm/MPa) of the aluminum alloy material is 320, the yield strength (Rp0.2/MPa) is 300, the maximum diameter of a non-metal compound in the internal structure of the section bar is 100 mu m, and the maximum size of a coarse crystal layer is 0.5 mm. With the continuous upgrading of product structures, the weight reduction is lighter and lighter, various technical indexes of a designed new material have higher technical requirements than the old one, such as mechanical property strength (the new requirement is higher than the old requirement by about 60Mpa, and the high strength performance is higher than the performance of a 7-series ultra-strong aluminum alloy and far exceeds the maximum standard which can be achieved by most of the current enterprises), while domestic aluminum plants can really achieve the performance requirements and have few stable production, particularly, the alloy composition distribution ratio is less and less than that of enterprises which can be developed for improving the product performance, and finally the enterprises can not produce stably, thereby seriously affecting the development routes of the enterprises in the field of developing products.
Disclosure of Invention
The application aims to provide an aluminum alloy and a preparation method thereof, and aims to solve the problem that the conventional aluminum alloy material for the anti-lock braking safety valve body cannot meet the requirement of the technical index of the system material.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
in a first aspect, the present application provides an aluminum alloy, wherein the aluminum alloy comprises the following elements in percentage by weight, based on the total weight of the aluminum alloy as 100%:
mg: 1.00-1.10%, Si: 0.68-0.78%, Fe: 0.34-0.40%, Cu: 0.30-0.40%, Mn: 0.08-0.18%, Cr: 0.06-0.16%, Ti: 0.06-0.16%, V: 0.05-0.15%, Zn: less than or equal to 0.2 percent and the balance of Al.
The second aspect of the present application provides a method for preparing an aluminum alloy profile, comprising the following steps:
melting a raw aluminum ingot and aluminum alloy waste, adding an alloy element material into the melt until the content of the alloy element in the obtained melt meets the element composition of the aluminum alloy in the first aspect of the application, and refining to obtain an alloy melt;
degassing the alloy melt, filtering the alloy melt in a two-stage mode, and casting the alloy melt into an aluminum alloy cast rod;
and (3) homogenizing the aluminum alloy cast rod, and heating and extruding to form the aluminum alloy section.
Preferably, the aluminum alloy scrap accounts for 40-60 wt% of the total weight of the raw aluminum ingot and the aluminum alloy scrap as 100%.
Preferably, the aluminum alloy waste is selected from 6063, 6060, 6061 and 6005 geometric waste which is derived from extrusion gloss, cast rod head and tail cutting and has large block regulation, and the aluminum alloy waste does not contain oxidation materials, spraying materials, saw cutting aluminum chips and waste with undefined alloy components.
Preferably, the method of the double-stage filtration comprises the following steps: and (3) performing primary filtration treatment on the alloy melt after degassing treatment through a filter plate with the precision of 50-70PPI, and performing precise filtration treatment on the alloy melt after the primary filtration treatment by adopting a C-grade filter tube.
Preferably, in the step of casting the aluminum alloy cast rod, the casting method comprises: regulating the temperature of the alloy melt to 740-750 ℃, the casting speed to 60-80mm/min, the cooling water flow to 1450-1530L/min, after casting for 1-2min, regulating the casting speed to 80-100mm/min, the cooling water flow to 2500-3000L/min, and the cooling water temperature to be less than or equal to 35 ℃, and casting to obtain the aluminum alloy cast rod.
Preferably, the method for homogenizing the aluminum alloy cast rod comprises the following steps: keeping the temperature for 7.5-8.5 h under the condition that the temperature is 550-570 ℃, and rapidly cooling water at the rate of 300 ℃/h after the furnace is taken out from the furnace by temperature increase.
Preferably, the method for heating and extruding comprises the following steps: and (2) heating the whole aluminum alloy cast rod in a zero gradient manner at the temperature of 510 +/-10 ℃, regulating and controlling the discharging speed of the section bar to be 5-6 m/min, and extruding and molding the aluminum alloy cast rod at the temperature of more than or equal to 530 ℃.
Preferably, after the step of extruding and forming the aluminum alloy cast rod, the method further comprises the step of carrying out on-line quenching on the obtained aluminum alloy profile in a 100% water cooling mode, so that the surface temperature of the aluminum alloy profile is less than or equal to 50 ℃.
Preferably, before the heating and extrusion molding, the method further comprises: carrying out high-power over-sintering inspection and low-power grain size, inclusion, crack and other inspection on the aluminum alloy cast rod subjected to the homogenizing treatment, and carrying out flaw detection; and/or
After the heating extrusion molding, the method further comprises the following steps: and (3) carrying out high-power over-sintering inspection, low-power grain size inspection, inclusion inspection, crack inspection and the like on the aluminum alloy section, and mechanical property inspection.
The aluminum alloy mainly comprises Mg, Si, Fe, Cu, Mn, Ti, Cr and V alloy elements with specific contents, and the aluminum alloy formed by the elements in proportion has the advantages of ultrahigh strength, good extrudability, processability and the like. Specifically, sufficient Mg is formed by 1.00-1.10 wt% of Mg and 0.68-0.78 wt% of Si2Si compound and a certain amount ofFree Si can ensure the performance strength and improve the extrudability of the material; fe with the weight percentage of 0.34-0.40% and Al form FeAl3The method has a certain grain refining effect, and can solve the problem of burr production in a threaded hole during drilling of the material, so that the inner surface of the material is smoother, and the oil flow is smoother and unimpeded in the use process of the material; cu with the weight percentage of 0.30-0.40% and Al form CuAl2The heat treatment strengthening effect is enhanced, and the mechanical property of the material is further improved; trace Mn (0.08-0.18%) and Cr (0.06-0.16%) to form MnAl6And CrAl7The compound further increases the recrystallization temperature of the alloy and hinders the growth of recrystallization; the Ti content is controlled to be 0.06-0.16%, and TiAl is mainly formed3The compound can reduce the columnar crystal structure of the cast rod, refine the crystal grains of the aluminum alloy product, and make the material performance after the crystal grains are refined more uniform and stable; 0.05 to 0.15 weight percent of transition element V to form VAl6The compound is dispersed and uniformly distributed to inhibit the process of recrystallization, so that the aim of refining the recrystallization texture is fulfilled, the aging behavior is changed, the recrystallized grains of the product are refined, the strength and the toughness are improved, and the plasticity and the corrosion resistance are improved; zn is taken as an impurity and is controlled to be below 0.2 percent, so that the influence on the performance of the aluminum alloy is avoided.
The aluminum alloy is used as a material of a new anti-lock brake safety valve body, various technical indexes of the new anti-lock brake safety valve body are far higher than the 6061 national performance standard and the highest technical standard which can be reached by other aluminum processing enterprises, meanwhile, the extrudability, chemical components and mechanical property strength of the aluminum alloy provided by the application are superior to those of partial 7-series superhard aluminum alloy, and the 7-series aluminum alloy can be completely replaced for extrusion production, so that the casting and extrusion processing cost is reduced, the production efficiency is greatly improved, and good economic benefits are brought to enterprises.
According to the preparation method of the aluminum alloy section bar, on one hand, the aluminum alloy waste is used as the raw material, so that the cost can be reduced, the crystal grains can be refined, the strength and the toughness are improved, the plasticity and the corrosion resistance are improved, and the mechanical property of the aluminum alloy section bar is finally improved. On the other hand, through refining and double-stage filtering, impurities such as non-metallic inclusions in the aluminum alloy cast rod are effectively reduced, the purity of the internal quality of the aluminum alloy cast rod is improved, the defects of pores, inclusions and the like in the internal structure of the cast rod are effectively reduced, and the internal structure quality of the aluminum alloy section is improved (the size diameter of the obtained non-metallic compound is less than or equal to 30 microns in high-power detection of the aluminum alloy section). The aluminum alloy section prepared according to the process flow provided by the application can obtain the aluminum alloy section with mechanical property strength far higher than the 6061 national performance standard and the highest technical standard which can be reached by other aluminum processing enterprises, and simultaneously, the extrusion property, chemical components and mechanical property strength of the alloy are all superior to those of part of 7-series superhard aluminum alloy.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
With the improvement of the requirements of people on the technical indexes of new materials, the performance requirements of the new aluminum alloy materials of the anti-lock brake safety valve body are higher and higher. In order to enable the aluminum alloy material of the anti-lock brake safety valve body to meet or even exceed the national performance standard 6061 and the highest technical standard requirement which can be met by other aluminum processing enterprises, the embodiment of the application designs the optimal proportion content by fully excavating the characteristics of Mg, Si, Fe, Cu, Mn, Ti and Cr elements and adding a trace amount of transition element V at the same time, provides a novel aluminum alloy and a preparation method of an aluminum alloy section, enables all technical indexes of the aluminum alloy to be far higher than the highest technical standard which can be met by the existing enterprises, and has better production quality and performance stability. Hereinafter, the aluminum alloy may also be named 6CN61 alloy. In particular, the method comprises the following steps of,
in a first aspect, embodiments of the present application provide an aluminum alloy, which includes the following elements in the following weight percentages, based on the total weight of the aluminum alloy taken as 100%:
mg: 1.00-1.10%, Si: 0.68-0.78%, Fe: 0.34-0.40%, Cu: 0.30-0.40%, Mn: 0.08-0.18%, Cr: 0.06-0.16%, Ti: 0.06-0.16%, V: 0.05-0.15%, Zn: less than or equal to 0.2 percent and the balance of Al.
The aluminum alloy provided by the embodiment of the application mainly comprises Mg, Si, Fe, Cu, Mn, Ti, Cr and V alloy elements with specific contents, and the aluminum alloy formed by the elements in proportion has the advantages of ultrahigh strength, good extrudability, processability and the like. The aluminum alloy is used as a material of a new anti-lock brake safety valve body, various technical indexes of the new anti-lock brake safety valve body are far higher than the 6061 national performance standard and the highest technical standard which can be reached by other aluminum processing enterprises, meanwhile, the extrudability, chemical components and mechanical property strength of the aluminum alloy provided by the application are superior to those of partial 7-series superhard aluminum alloy, and the 7-series aluminum alloy can be completely replaced for extrusion production, so that the casting and extrusion processing cost is reduced, the production efficiency is greatly improved, and good economic benefits are brought to enterprises.
Specifically, in the aluminum alloy industry, many researchers consider that Fe is a harmful impurity, and the less the Fe is, the better the Fe is, so in order to control the content of the impurity Fe, a high-purity aluminum ingot is generally adopted as a raw material for fusion casting production, which can greatly increase the cost of the aluminum alloy. In the embodiment of the application, the use function of the Fe element is fully developed, the Fe element is added into the aluminum alloy, and the weight percentage of the Fe element is controlled to be within the range of 0.34-0.40%. In this case, Fe and Al produce FeAl3The method has the advantages that the method has a certain grain refining effect, and simultaneously, burrs are generated in threaded holes during drilling, so that the inner surface of the material is smoother, and the oil flow is smoother and unimpeded in the use process of the material. When the content of Fe is low, in order to meet the alloy performance requirement, a pure aluminum ingot is generally needed to be used as an aluminum raw material, and the requirements are that the content of the pure aluminum ingot is high and the application range of aluminum alloy waste materials is narrow. The content of Fe element added into the aluminum alloy provided by the embodiment of the application is 0.34-0.40%, the common aluminum ingot can be used as an aluminum raw material while the aluminum alloy is matched with other alloy elements to exert the performances, and the application range of aluminum alloy waste is wide, so that the alloy chemical components of a cast rod can be ensured, and the casting processing cost can be further reduced. In the embodiment of the application, if the content of the Fe element is too small, such as less than 0.34%, the Fe, Mn, Si and other elements are neutralized and offset to form coarse AlMnFeSi compounds, so that the plasticity of the alloy is reduced, and the alloy is easy to crack during deformation; if the content of Fe element is too high, for example, more than 0.40%, Al of an insoluble phase is formed7Cu2Fe, which can reduce the mechanical property of the alloy in a quenching aging state.
In the embodiment of the application, 0.05-0.15 wt% of transition element V is added into the aluminum alloy to form VAl6Compound, VAl6The compound is uniformly dispersed, so as to refine the as-cast structure, raise the recrystallization temperature, inhibit the recrystallization process, refine the recrystallized structure, change the aging behavior and make the productThe recrystallized grains are refined, so that the strength and the toughness of the aluminum alloy are improved, and the plasticity and the corrosion resistance are improved. The aluminum alloy section bar obtained by the method has no phenomenon of coarse grains when the low power inspection is carried out, and the size of a coarse crystal layer is less than or equal to 0.3 mm.
In the embodiment of the application, 1.00-1.10 wt% of Mg element and 0.68-0.78 wt% of Si element are added into the aluminum alloy, and Si and Mg form enough Mg2After the Si compound, a part of the Si element exists in the form of free Si. Under the condition, the performance strength of the aluminum alloy can be ensured, and the extrudability of the material can be improved.
In the embodiment of the application, the Cu element with the weight percentage of 0.30-0.40% in the aluminum alloy forms CuAl with the Cu2The compound enhances the heat treatment strengthening effect and further improves the mechanical property of the material. If the content of the Cu element is too low (less than 0.30%), Cu may be completely dissolved in the aluminum matrix and a reinforcing phase may not be formed, and the above-described reinforcing effect cannot be exerted; if the content of Cu element is too high, the extrudability of the material is lowered, and the production efficiency is impaired.
In the aluminum alloy provided by the embodiment of the application, trace Mn (0.08-0.18%) and Cr (0.06-0.16%) mainly form MnAl6And CrAl7The compound further increases the recrystallization temperature of the alloy and hinders the growth of recrystallization.
In the aluminum alloy provided by the embodiment of the application, the Ti content is controlled to be 0.06-0.16%, and TiAl is mainly formed3The compound can reduce the columnar crystal structure of the cast rod, refine the crystal grains of the product and make the material performance after the crystal grains are refined more uniform and stable. If the Ti content is too high, the casting crack tendency is increased.
In the aluminum alloy provided by the embodiment of the application, the Zn element is not added, but the Zn possibly exists as impurities, and the Zn element is controlled to be below 0.2% in the embodiment of the application, so that the influence on the performance of the aluminum alloy is avoided.
The section bar formed by the aluminum alloy provided by the first aspect of the embodiment of the application can be prepared by the following method.
In a second aspect, an embodiment of the present application provides a method for preparing an aluminum alloy profile, including the following steps:
s01, melting a raw aluminum ingot and aluminum alloy waste, adding an alloy element material into a melt until the content of the alloy element in the obtained melt meets the element composition of the aluminum alloy in the first aspect of the embodiment of the application, and refining to obtain an alloy melt;
s02, degassing and filtering the alloy melt in two stages, and then casting the alloy melt into an aluminum alloy cast rod;
and S03, homogenizing the aluminum alloy cast rod, and heating and extruding to form the aluminum alloy section.
According to the preparation method of the aluminum alloy section provided by the embodiment of the application, on one hand, the aluminum alloy waste is used as the raw material, so that the cost can be reduced, the crystal grains can be refined, the strength and toughness are improved, the plasticity and corrosion resistance are improved, and the mechanical property of the aluminum alloy section is finally improved. On the other hand, through refining and double-stage filtering, impurities such as non-metallic inclusions in the aluminum alloy cast rod are effectively reduced, the purity of the internal quality of the aluminum alloy cast rod is improved, the defects of pores, inclusions and the like in the internal structure of the cast rod are effectively reduced, and the internal structure quality of the aluminum alloy section is improved (the size diameter of the obtained non-metallic compound is less than or equal to 30 microns in high-power detection of the aluminum alloy section). The aluminum alloy section prepared according to the process flow provided by the application can obtain the aluminum alloy section with mechanical property strength far higher than the 6061 national performance standard and the highest technical standard which can be reached by other aluminum processing enterprises, and simultaneously, the extrusion property, chemical components and mechanical property strength of the alloy are all superior to those of part of 7-series superhard aluminum alloy.
Specifically, in step S01, when the aluminum alloy profile is prepared by using all of the raw aluminum ingots, the tendency of coarse grains is easily increased, and the internal quality of the obtained aluminum cast bar is affected. Therefore, not only can the crystal grains be refined, the strength and the toughness be improved, the plasticity and the corrosion resistance be improved, and finally the mechanical property of the aluminum alloy section bar is improved, but also compared with the original aluminum ingot, the aluminum alloy waste material has incomparable cost advantage.
Nevertheless, it should be understood that not the more content of the aluminum alloy scrap is better. When the aluminum alloy waste is completely adopted, the component deviation is large in the casting process, and the element components are unqualified. In some embodiments, the aluminum alloy scrap is present in an amount ranging from 40% to 60% by weight, based on 100% by weight of the total weight of the raw aluminum ingot and the aluminum alloy scrap.
In some embodiments, the aluminum alloy scrap is selected from the group consisting of large regular 6063, 6060, 6061, 6005 geometric scrap from extruded bare stock, cast bar crop ends, and the like, and is free of oxidized stock, sprayed stock, saw cut aluminum scrap, and scrap of undefined alloy composition. This is because the oxide material and the sand blast material are treated by oxidation and spraying processes, and the surfaces of the oxide material and the sand blast material contain some non-metallic inclusions, and if the non-metallic inclusions are added, the purity of the aluminum melt is increased; the waste material with undefined alloy components is not beneficial to regulating the element types and contents in the alloy. By selecting the aluminum alloy waste, the non-metallic inclusions brought by the waste can be effectively reduced, so that the purity of the aluminum melt is ensured.
Melting the raw aluminum ingot and the aluminum alloy waste, namely carrying out melting treatment, so that the raw aluminum ingot and the aluminum alloy form a melt state. Then, an alloying element material was added to the melt to adjust the composition and content thereof in the melt according to the elemental composition of the aluminum alloy described in the first aspect of the example of the present application.
Further, the obtained melt containing each element is subjected to refining treatment. Through refining treatment, impurities in the melt can be effectively removed, so that the aluminum liquid is purer and grain refinement is facilitated. In some embodiments, the refining treatment is achieved by adding a refining agent to the melt. In some embodiments, the refining is performed by using an environment-friendly fluorine-free sodium-free refining agent, and the exhaust emission generated by using the refining agent meets the national environmental protection standard.
In some embodiments, the refining agent is added at 1.5 to 2.5Kg/T per refining.
In some embodiments, the temperature of the two refinements is 740 ℃ to 750 ℃ respectively. If the refining temperature is too high, molten metal formed by melting metal is easy to oxidize, and part of alloy elements are large in burning loss; if the refining temperature is low, each metal is not sufficiently melted, and part of the alloy is difficult to be sufficiently melted into the molten metal. It should be understood that the two refining temperatures are not required to be strictly uniform, and some deviation is allowed.
In some embodiments, the melt is refined twice, and each refining time is 10-20 min. Through twice refining treatment, the inclusion removal rate can reach more than 95 percent, and the aluminum alloy melt with the impurity size within 3um can be completely obtained.
In the above step S02, the obtained alloy melt is degassed to remove gases generated in the alloy melt. In some embodiments, the degassing process employs an in-line degassing process. In some embodiments, the process conditions for the in-line degassing treatment are: the rotation speed of the rotor is 600-650 rpm, the Ar flow rate is 35-55L/min, and the gas working pressure is 0.2-0.4 MPa.
And after degassing the alloy melt, performing double-stage filtration treatment on the alloy melt. Through the refining in the step S01 and the two-stage filtration in the step, impurities such as non-metallic inclusions in the aluminum alloy cast rod are effectively reduced, the purity of the internal quality of the aluminum alloy cast rod is improved, and the defects of pores, inclusions and the like in the internal structure of the cast rod are effectively reduced.
In some embodiments, the method of dual stage filtration is: and (3) firstly, performing primary filtration treatment (continuous flow filtration treatment) on the alloy melt after degassing treatment through a filter plate with the precision of 50-70PPI, and then performing precise filtration treatment on the alloy melt after the primary filtration treatment by using a C-grade filter pipe. The 60PPI filter plate filters, the impurity removal rate can reach more than or equal to 90% of 10um, but the 60PPI filter plate is adopted for filtering alone, the impurity removal precision is too low, the impurity removal effect is too poor, and the filter plate is easy to block; on the basis, the impurities can be further removed by combining the filtration of the C-level filter tube, so that the impurity removal rate of the alloy melt reaches more than or equal to 95 percent (3 um). Although the impurity removal rate of the C-level filtering pipe is high, the C-level filtering pipe is adopted for filtering alone, the filtering load is too large, the filtering efficiency of the C-level filtering pipe is reduced, and the service life of the C-level filtering pipe is prolonged. Therefore, the two-stage filtration effectively reduces impurities in the aluminum melt, reduces the load of the filter pipe, improves the throughput of the filter pipe, further ensures the purity of the internal quality of the cast rod, effectively improves the internal tissue quality of the aluminum alloy section bar, and obtains the aluminum alloy section bar with the size diameter of the high-power detection nonmetal compound less than or equal to 30 μm.
And casting the alloy melt into an aluminum alloy cast rod after double-stage filtration. In some embodiments, in the step of casting an aluminum alloy cast rod, the casting is performed by: regulating the temperature of the alloy melt to 740-750 ℃, the casting speed to 60-80mm/min, the cooling water flow to 1450-1530L/min, after casting for 1-2min, regulating the casting speed to 80-100mm/min, the cooling water flow to 2500-3000L/min, and the cooling water temperature to be less than or equal to 35 ℃, and casting to obtain the aluminum alloy cast rod.
In step S03, the aluminum alloy cast rod is homogenized to eliminate segregation of internal components of crystal grains in the alloy. In some embodiments, the aluminum alloy cast rod is homogenized by the following method: keeping the temperature for 7.5-8.5 h under the condition that the temperature is 550-570 ℃, rapidly cooling water at the rate of 260-300 ℃/h after the cast rod is taken out of the furnace after the cast rod is warmed, further hindering the decomposition of element solid solutions of Al, Mg, Si and the like, and preventing coarse strengthening phases from being precipitated, thereby obtaining the cast rod with more uniform structure and components.
In some embodiments, after homogenization, the aluminum alloy cast bar is inspected for high and low grain sizes, inclusions, cracks, and the like, as well as for flaws. In some embodiments, the flaw detection is carried out by a water intrusion type flaw detector in a 100% all-dimensional 360-degree flaw detection mode, the flaw detection grade is executed according to A grade, and unqualified casting is prevented from flowing to a next process to produce defective aluminum sections.
Further, heating and extruding the homogenized aluminum alloy cast rod to prepare the aluminum alloy section. In some embodiments, the method of heating and extruding is: and (2) heating the whole aluminum alloy cast rod in a zero gradient manner at the temperature of 510 +/-10 ℃, regulating and controlling the discharging speed of the section bar to be 5-6 m/min, and extruding and molding the aluminum alloy cast rod at the temperature of more than or equal to 530 ℃. The cast rod is heated by adopting a zero-gradient induction heating furnace, so that the consistency of the temperature of the head, the middle and the tail of the cast rod is further ensured, and the mechanical property of the section is improved.
In some embodiments, after the step of extruding and forming the aluminum alloy cast rod, the method further comprises the step of quenching the obtained aluminum alloy profile on line in a 100% through water cooling mode, so that the surface temperature of the aluminum alloy profile is less than or equal to 50 ℃, the aluminum alloy profile is ensured to be fully supersaturated, and a solid solution is fixed without decomposition, thereby preventing a strengthening phase from being precipitated, and reducing the mechanical property after artificial aging.
In some embodiments, after the heating and extrusion molding, the method further comprises: and (5) aging. In some embodiments, the aging procedure is: and a process system of 180 ℃ for 8h is adopted, air cooling is carried out after discharging, and the mechanical property of the aluminum alloy section can reach the peak value.
After the heating extrusion molding, the method further comprises the following steps: and (3) carrying out high-power over-sintering inspection, low-power grain size inspection, inclusion inspection, crack inspection and the like on the aluminum alloy section, and mechanical property inspection.
In some embodiments, a method of making an aluminum alloy profile, comprises the steps of:
melting a raw aluminum ingot and aluminum alloy waste, adding an alloy element material into the melt until the content of the alloy element in the obtained melt meets the element composition of the aluminum alloy in the first aspect of the embodiment of the application, and then carrying out refining treatment twice, wherein the refining time is 10-20 min each time, so as to obtain an alloy melt, wherein the aluminum alloy waste is selected from 6063, 6060, 6061 and 6005 geometric waste which is derived from large block rules such as extrusion polishing materials, cast rod head and tail cutting materials and the like, and the aluminum alloy waste does not contain an oxidation material, a spraying material, saw cutting aluminum chips and waste with undefined alloy components; and the weight percentage of the aluminum alloy waste is 40-60% based on the total weight of the raw aluminum ingot and the aluminum alloy waste as 100%.
Degassing the alloy melt, performing continuous flow filtration treatment on the alloy melt after degassing treatment through a filter plate with the precision of 50-70PPI, and performing precise filtration treatment on the alloy melt after the first filtration treatment by adopting a C-grade filter tube; regulating the temperature of the alloy melt to 740-750 ℃, the casting speed to 60-80mm/min, the cooling water flow to 1450-1530L/min, after casting for 1-2min, regulating the casting speed to 80-100mm/min, the cooling water flow to 2500-3000L/min, and the cooling water temperature to be less than or equal to 35 ℃, and casting to obtain the aluminum alloy cast rod.
Preserving the heat for 7.5 to 8.5 hours at the temperature of 550 to 570 ℃, and rapidly cooling the water at the rate of 300 ℃/h after the furnace is taken out from the furnace at the temperature of 260-; and (2) heating the whole aluminum alloy cast rod in a zero gradient manner at the temperature of 510 +/-10 ℃, regulating and controlling the discharging speed of the section bar to be 5-6 m/min, and extruding and molding the aluminum alloy cast rod at the temperature of more than or equal to 530 ℃. And (3) carrying out on-line quenching on the obtained aluminum alloy profile in a 100% water cooling mode to ensure that the surface temperature of the aluminum alloy profile is less than or equal to 50 ℃. And (3) adopting a process system of 180 ℃ for 8h, and cooling the product after discharging.
According to the chemical component distribution ratio and the casting and extrusion processing technology of the embodiment, the tensile strength (Rm/MPa) of the aluminum alloy section is more than or equal to 380, and the yield strength (Rp0.2/MPa) of the aluminum alloy section is more than or equal to 360. The mechanical property strength is far higher than the 6061 national property standard and the highest technical standard which can be achieved by other aluminum processing enterprises, and meanwhile, the extrudability, chemical components and mechanical property strength of the 6CN61 alloy are superior to those of partial 7-series superhard aluminum alloy, so that the 7-series aluminum alloy can be completely replaced for extrusion production, thereby not only reducing the casting and extrusion processing cost, but also greatly improving the production efficiency and bringing good economic benefit to the enterprises.
In order to further ensure the stability of quality and performance in the production process of products, the company continuously arranges and casts 3-heat 6CN61 alloy cast bars, and respectively performs extrusion and related high-power, low-power and mechanical property detection, and the specific case is implemented as follows.
Example 1
The novel 6CN61 alloy aluminum profile for the anti-lock brake safety valve comprises the following components by taking the total weight of the 6CN61 alloy aluminum profile as 100 percent: mg: 1.00-1.10%, Si: 0.68-0.78%, Fe: 0.34-0.40%, Cu: 0.30-0.40%, Mn: 0.08-0.18%, Cr: 0.06-0.16%, Ti: 0.06-0.16%, Zn: less than or equal to 0.2 percent, V: 0.05-0.15% and the balance of Al.
The preparation process of the novel 6CN61 alloy aluminum profile for the anti-lock brake safety valve body sequentially comprises the following steps: batching, smelting, component adjustment, refining maintenance, online degassing, filtering, casting, homogenizing, flaw detection, inspection, cast rod heating, extrusion, stretching and sawing, aging and inspection.
Specifically, the preparation method of the 6CN61 alloy aluminum profile for the novel anti-lock brake safety valve body comprises the following steps:
according to the mass ratio of 1: adding a common raw aluminum ingot and aluminum alloy waste materials according to the proportion of 1, wherein the weight percentage of aluminum in the common raw aluminum ingot is 99.7%, and the aluminum alloy waste materials are selected from large regular geometric waste materials such as extruded smooth materials, cast rods, head and tail cutting and the like. Melting the common raw aluminum ingot and the aluminum alloy waste at the temperature of 748 ℃, adding other element raw materials of the aluminum alloy, fully stirring, carrying out stokehole analysis, and carrying out component adjustment according to an analysis result to meet the chemical component requirement of 6CN61, wherein the specific content is shown in Table 1. And refining the melt twice by adopting a fluorine-free and sodium-free refining agent to obtain the aluminum alloy melt, wherein the refining agent is added at 2.0Kg/T each time, the refining time is 15 minutes each time, and the temperature of the refining reaction is 745 ℃ and 742 ℃ respectively. Carrying out online degassing treatment on the aluminum alloy melt, wherein the process conditions of the online degassing treatment are as follows: the rotation speed of the rotor is 600-650 rpm, the Ar flow rate is 35-55L/min, and the gas working pressure is 0.2-0.4 MPa. And after the online degassing treatment is finished, performing double-stage filtration treatment. Specifically, a filter plate with the pore density of 60PPI is adopted to carry out continuous flow filtration treatment and a C-grade filter tube is adopted to carry out precise filtration treatment, and the hydrogen content of the aluminum liquid is measured on line and is 0.15mL/100g Al. And standing the obtained molten aluminum for 40-60 minutes, and then casting to obtain the 6CN61 alloy cast rod. Wherein the casting process is characterized in that the aluminum melt is cast for 1min in advance under the conditions that the temperature is 741 ℃, the casting starting speed is 70mm/min and the cooling water starting flow is 1450-1530L/min; and then, adjusting the casting speed to be 90mm/min, the normal flow of cooling water to be 2500-3000L/min, and controlling the temperature of cold water to be less than or equal to 35 ℃ to perform casting treatment to obtain the 6CN61 alloy cast rod. Homogenizing the cast rod by adopting a 560 ℃ by 8h process, and rapidly cooling by water after discharging. And finally, inspecting the cast rod, wherein 1 piece of sample at the head end and the tail end of one long cast rod is respectively taken for each melting time to perform high-power overburning inspection and low-power grain size, inclusion, crack inspection and the like, and the detection result shows that the cast rod is not overburnt and the grains, the looseness, the inclusion and the like meet the technical requirements. And sawing the cast rod into 780mm short rods for flaw detection, and executing according to A-grade standard, wherein the detection result is 100% qualified.
Heating the flaw-detected short rod in a power frequency induction heating furnace in a zero gradient heating mode, wherein the actual measurement temperature of the cast rod is 510 ℃ at the head end, 508 ℃ at the tail end and 462 ℃ at the die; the temperature of the extrusion cylinder is 455 ℃, the heated die and the cast rod are sent into the extrusion cylinder for extrusion, the cast rod is extruded from a die hole of the die at the extrusion speed of 5.5m/min to obtain a new anti-lock brake safety valve body section, the temperature of the section before entering a water tank is actually measured to be 535 ℃ and 545 ℃, and the surface temperature of the section after water penetration is 25 ℃; and (3) stretching according to 0.8-1.2%, straightening, enabling the size to meet the requirement of a drawing, sawing into a fixed length, performing artificial aging at 180 ℃ for 8h, and discharging and cooling by a fan.
Table 1 chemical composition of 6CN61 in example 1 (mass fraction/%)
And finally, inspecting the section, and sampling 1 sample of each section with 2 rods at the head and the tail of the section and 1 sample of each section with the head and the tail of the section to perform high and low power and mechanical property detection, wherein specific test results are shown in table 2.
TABLE 2 test results of the profiles
Example 2
The novel 6CN61 alloy aluminum profile for the anti-lock brake safety valve comprises the following components by taking the total weight of the 6CN61 alloy aluminum profile as 100 percent: mg: 1.00-1.10%, Si: 0.68-0.78%, Fe: 0.34-0.40%, Cu: 0.30-0.40%, Mn: 0.08-0.18%, Cr: 0.06-0.16%, Ti: 0.06-0.16%, Zn: less than or equal to 0.2 percent, V: 0.05-0.15% and the balance of Al.
The preparation process of the novel 6CN61 alloy aluminum profile for the anti-lock brake safety valve body sequentially comprises the following steps: batching, smelting, component adjustment, refining maintenance, online degassing, filtering, casting, homogenizing, flaw detection, inspection, cast rod heating, extrusion, stretching and sawing, aging and inspection.
Specifically, the preparation method of the 6CN61 alloy aluminum profile for the novel anti-lock brake safety valve body comprises the following steps:
according to the mass ratio of 55: 45 percent of common raw aluminum ingot and aluminum alloy waste, wherein the weight percentage of aluminum in the common raw aluminum ingot is 99.7 percent, and the aluminum alloy waste is selected from large regular geometric waste such as extruded smooth materials, cast rods, head and tail cutting and the like. Melting the common raw aluminum ingot and the aluminum alloy waste at 746 ℃, adding other element raw materials of the aluminum alloy, fully stirring, performing stokehole analysis, and adjusting components according to the analysis result to meet the chemical component requirements of 6CN61, wherein the specific content is shown in Table 3. Refining the melt twice by adopting a fluorine-free and sodium-free refining agent to obtain the aluminum alloy melt, wherein the refining agent is added at 2.0Kg/T each time, the refining time is 15 minutes each time, the temperature of two refining reactions is 748 ℃ and 746 ℃ respectively, and online degassing treatment is carried out on the aluminum alloy melt, and the process conditions of the online degassing treatment are as follows: the rotation speed of the rotor is 600-650 rpm, the Ar flow rate is 35-55L/min, and the gas working pressure is 0.2-0.4 MPa. And after the online degassing treatment is finished, performing double-stage filtration treatment. Specifically, a filter plate with the pore density of 60PPI is adopted to carry out continuous flow filtration treatment and a C-grade filter tube is adopted to carry out precise filtration treatment, and the hydrogen content of the aluminum liquid is measured on line and is 0.13mL/100g Al. And (3) standing the aluminum liquid for 40-60 minutes, and casting to obtain the 6CN61 alloy cast rod. Wherein the casting process is to cast for 1min under the conditions that the temperature of an aluminum melt is 745 ℃, the casting starting speed is 70mm/min and the cooling water starting flow is 1450-1530L/min; and then, adjusting the casting speed to be 90mm/min, the normal flow of cooling water to be 2500-3000L/min, and controlling the temperature of cold water to be less than or equal to 35 ℃ to perform casting treatment to obtain the 6CN61 alloy cast rod. Homogenizing the cast rod by adopting a 560 ℃ by 8h process, and rapidly cooling by water after discharging. And finally, inspecting the cast rod, and performing high-low power inspection on 1 sample of the head and the tail of the long rod respectively for each melting time of the cast rod, wherein the detection result shows that the cast rod is not over-burnt, and the crystal grains, the looseness, the inclusions and the like meet the technical requirements. And sawing the cast rod into 780mm short rods for flaw detection, and executing according to A-grade standard, wherein the detection result is 100% qualified.
Heating the flaw-detected short rod in a power frequency induction heating furnace in a zero gradient heating mode, wherein the actual measured temperature of the cast rod is 515 ℃ at the head end, 510 ℃ at the tail end and 465 ℃ at a die; the temperature of an extrusion cylinder is 454 ℃, the heated die and the cast rod are sent into the extrusion cylinder for extrusion, the cast rod is extruded from a die hole of the die at the extrusion speed of 5.5m/min to obtain a new anti-lock brake safety valve body section, the temperature of the section before entering a water tank is actually measured to be 540 ℃ and 548 ℃, and the surface temperature of the section after being soaked with water is 23 ℃; and (3) stretching according to 0.8-1.2%, straightening, enabling the size to meet the requirement of a drawing, sawing into a fixed length, performing artificial aging at 180 ℃ for 8h, and discharging and cooling by a fan.
Table 3 chemical composition of 6CN61 in example 2 (mass fraction/%)
And finally, the section is inspected, 1 sample of each section in each batch is respectively taken from 2 rod heads and tails and 1 sample of each rod head and tail to carry out high and low power and mechanical property detection, and specific test results are shown in table 4.
TABLE 4 test results of the profiles
Example 3
The novel 6CN61 alloy aluminum profile for the anti-lock brake safety valve comprises the following components by taking the total weight of the 6CN61 alloy aluminum profile as 100 percent: mg: 0.90-1.10%, Si: 0.68-0.78%, Fe: 0.34-0.40%, Cu: 0.30-0.40%, Mn: 0.08-0.18%, Cr: 0.06-0.16%, Ti: 0.06-0.16%, Zn: less than or equal to 0.2 percent, V: 0.05-0.15% and the balance of Al.
The preparation process of the novel 6CN61 alloy aluminum profile for the anti-lock brake safety valve body sequentially comprises the following steps: batching, smelting, component adjustment, refining maintenance, online degassing, filtering, casting, homogenizing, flaw detection, inspection, cast rod heating, extrusion, stretching and sawing, aging and inspection.
Specifically, the preparation method of the 6CN61 alloy aluminum profile for the novel anti-lock brake safety valve body comprises the following steps:
according to the mass ratio of 6: 4, adding a common raw aluminum ingot and aluminum alloy waste materials, wherein the weight percentage of aluminum in the common raw aluminum ingot is 99.7%, and the aluminum alloy waste materials are selected from large regular geometric waste materials such as extruded smooth materials, cast rods, head and tail cutting and the like. Melting the common raw aluminum ingot and the aluminum alloy waste at 749 ℃, adding other element raw materials of the aluminum alloy, fully stirring, performing stokehole analysis, and adjusting components according to analysis results to meet the chemical component requirements of 6CN61, wherein the specific content is shown in Table 5. And refining the melt twice by adopting a fluorine-free and sodium-free refining agent to obtain the aluminum alloy melt, wherein the refining agent is added at 2.0Kg/T each time, the refining time is 15 minutes each time, and the temperature of the refining reaction is 744 ℃ and 745 ℃ respectively. Carrying out online degassing treatment on the aluminum alloy melt, wherein the process conditions of the online degassing treatment are as follows: the rotation speed of the rotor is 600-650 rpm, the Ar flow rate is 35-55L/min, and the gas working pressure is 0.2-0.4 MPa. And after the online degassing treatment is finished, performing double-stage filtration treatment. Specifically, a filter plate with the pore density of 60PPI is adopted to carry out continuous flow filtration treatment and a C-grade filter tube is adopted to carry out precise filtration treatment, and the hydrogen content of the aluminum liquid is measured on line and is 0.15mL/100g Al. And standing the obtained molten aluminum for 40-60 minutes, and then casting to obtain the 6CN61 alloy cast rod. Wherein the casting process is to cast for 1min under the conditions that the temperature of an aluminum melt is 745 ℃, the casting starting speed is 70mm/min and the cooling water starting flow is 1450-1530L/min; and then, adjusting the casting speed to be 90mm/min, the normal flow of cooling water to be 2500-3000L/min, and controlling the temperature of cold water to be less than or equal to 35 ℃ to perform casting treatment to obtain the 6CN61 alloy cast rod. Homogenizing the cast rod by adopting a 560 ℃ by 8h process, and rapidly cooling by water after discharging. And finally, inspecting the cast rod, and performing high-low power inspection on 1 sample of the head and the tail of the long rod respectively for each melting time of the cast rod, wherein the detection result shows that the cast rod is not over-burnt, and the crystal grains, the looseness, the inclusions and the like meet the technical requirements. And sawing the cast rod into 780mm short rods for flaw detection, and executing according to A-grade standard, wherein the detection result is 100% qualified.
Heating the flaw-detected short rod in a power frequency induction heating furnace in a zero gradient heating mode, wherein the actual measurement temperature of the cast rod is 518 ℃ at the head end, 515 ℃ at the tail end and 472 ℃ at the die; the temperature of an extrusion cylinder is 460 ℃, the heated die and the cast rod are sent into the extrusion cylinder for extrusion, the cast rod is extruded from a die hole of the die at an extrusion speed of 5.5m/min to obtain a new anti-lock brake safety valve body section, the temperature of the section before entering a water tank is actually measured to be 545 ℃ and 550 ℃, and the surface temperature of the section after water penetration is 20 ℃; and (3) stretching according to 0.8-1.2%, straightening, enabling the size to meet the requirement of a drawing, sawing into a fixed length, performing artificial aging at 180 ℃ for 8h, and discharging and cooling by a fan.
TABLE 5 chemical composition of 6CN61 in example 3 (mass fraction/%)
And finally, the section is inspected, 1 sample of each section in each batch is respectively taken from 2 rod heads and tails and 1 sample of each rod head and tail to carry out high and low power and mechanical property detection, and specific test results are shown in table 6.
TABLE 6 test results of profiles
As can be seen from the data provided in tables 2, 4 and 6: the novel anti-lock brake safety valve body aluminum alloy material obtained by adopting the chemical component formula and the smelting and extrusion processing technology disclosed by the embodiment of the application has the advantages that the mechanical property strength, the nonmetal compound, the coarse crystal layer and other technical indexes are far higher than the highest technical standard of 6061 national property standard and other aluminum processing enterprises, the product quality and the performance are stable in the production process, and meanwhile, the novel anti-lock brake safety valve body aluminum alloy material can completely replace 7-series aluminum alloy for extrusion production, so that the casting and extrusion processing cost is reduced, the production efficiency can be greatly improved, and good economic benefits are brought to the enterprises.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. An aluminum alloy, characterized in that the aluminum alloy comprises the following element components in percentage by weight, based on the total weight of the aluminum alloy taken as 100%:
mg: 1.00-1.10%, Si: 0.68-0.78%, Fe: 0.34-0.40%, Cu: 0.30-0.40%, Mn: 0.08-0.18%, Cr: 0.06-0.16%, Ti: 0.06-0.16%, V: 0.05-0.15%, Zn: less than or equal to 0.2 percent and the balance of Al.
2. The preparation method of the aluminum alloy profile is characterized by comprising the following steps of:
melting a raw aluminum ingot and aluminum alloy waste, adding an alloy element material into the melt until the content of the alloy element in the obtained melt meets the element composition of the aluminum alloy in claim 1, and refining to obtain an alloy melt;
degassing the alloy melt, filtering the alloy melt in a two-stage mode, and casting the alloy melt into an aluminum alloy cast rod;
and (3) homogenizing the aluminum alloy cast rod, and heating and extruding to form the aluminum alloy section.
3. The method of producing an aluminum alloy profile according to claim 2, wherein the aluminum alloy scrap is contained in an amount of 40 to 60 wt% based on 100 wt% of the total weight of the raw aluminum ingot and the aluminum alloy scrap.
4. The method for preparing the aluminum alloy profile according to claim 2, wherein the aluminum alloy scrap is selected from 6063, 6060, 6061 and 6005 geometric scrap which is derived from large block regulation such as extrusion gloss, cast rod head and tail cutting and does not contain an oxide material, a spray material, saw cutting aluminum scraps and waste materials with undefined alloy components.
5. The method for preparing an aluminum alloy profile of claim 2, wherein the double-stage filtration method comprises the following steps: and (3) performing primary filtration treatment on the alloy melt after degassing treatment through a filter plate with the precision of 50-70PPI, and performing precise filtration treatment on the alloy melt after the primary filtration treatment by adopting a C-grade filter tube.
6. The method of producing an aluminum alloy profile according to any one of claims 2 to 5, wherein in the step of casting into an aluminum alloy cast rod, the casting is performed by: regulating the temperature of the alloy melt to 741 ℃, the casting speed to be 60-80mm/min, the cooling water flow to be 1450-1530L/min, after casting for 1-2min, regulating the casting speed to be 80-100mm/min, the cooling water flow to be 2500-3000L/min, and the cooling water temperature to be less than or equal to 35 ℃, and casting to obtain the aluminum alloy cast rod.
7. The method for producing an aluminum alloy profile according to any one of claims 2 to 5, wherein the aluminum alloy cast rod is homogenized by: keeping the temperature for 7.5-8.5 h under the condition that the temperature is 550-570 ℃, and rapidly cooling water at the rate of 300 ℃/h after the furnace is taken out from the furnace by temperature increase.
8. The method for producing an aluminum alloy profile according to any one of claims 2 to 5, wherein the heating extrusion molding is performed by: and (2) heating the whole aluminum alloy cast rod in a zero gradient manner at the temperature of 510 +/-10 ℃, regulating and controlling the discharging speed of the section bar to be 5-6 m/min, and extruding and molding the aluminum alloy cast rod at the temperature of more than or equal to 530 ℃.
9. The method for preparing an aluminum alloy profile as claimed in claim 8, further comprising, after the step of extruding the aluminum alloy cast rod, on-line quenching the aluminum alloy profile obtained by using 100% water cooling to make the surface temperature of the aluminum alloy profile less than or equal to 50 ℃.
10. The method of producing an aluminum alloy profile according to any one of claims 2 to 5, further comprising, before the heating extrusion molding: carrying out high-power over-sintering inspection and low-power grain size, inclusion and crack inspection on the aluminum alloy cast rod subjected to the homogenizing treatment, and carrying out flaw detection; and/or
After the heating extrusion molding, the method further comprises the following steps: and (3) carrying out high-power over-sintering inspection, low-power grain size inspection, inclusion inspection and crack inspection and mechanical property inspection on the aluminum alloy section.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004522854A (en) * | 2000-12-20 | 2004-07-29 | アルカン・インターナショナル・リミテッド | Age hardening aluminum alloy |
| CN102965553A (en) * | 2012-12-11 | 2013-03-13 | 丛林集团有限公司 | Aluminum alloy cast ingot for automotive bumper and production process thereof |
| CN104313403A (en) * | 2014-10-31 | 2015-01-28 | 无锡海特铝业有限公司 | Aluminium alloy with high strength and excellent cutting property and preparation method thereof |
| CN105838943A (en) * | 2016-05-31 | 2016-08-10 | 广西南南铝加工有限公司 | Al-Mg-Si aluminum alloy and extrusion method for sectional bar of Al-Mg-Si aluminum alloy |
| CN107326227A (en) * | 2017-08-14 | 2017-11-07 | 山东南山铝业股份有限公司 | Rail transit vehicle body skirtboard aluminium alloy extrusions and its manufacture method |
| CN108118210A (en) * | 2017-11-28 | 2018-06-05 | 中铝材料应用研究院有限公司 | A kind of processing method of aluminium alloy and its extrudate |
| CN111168021A (en) * | 2019-12-11 | 2020-05-19 | 山东创新金属科技有限公司 | Casting process of aluminum alloy round ingot for forging hub |
| CN111560546A (en) * | 2020-04-29 | 2020-08-21 | 广东凤铝铝业有限公司 | Aluminum alloy with high crushing performance and preparation method of section bar of aluminum alloy |
-
2021
- 2021-04-19 CN CN202110417681.1A patent/CN113106309A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004522854A (en) * | 2000-12-20 | 2004-07-29 | アルカン・インターナショナル・リミテッド | Age hardening aluminum alloy |
| CN102965553A (en) * | 2012-12-11 | 2013-03-13 | 丛林集团有限公司 | Aluminum alloy cast ingot for automotive bumper and production process thereof |
| CN104313403A (en) * | 2014-10-31 | 2015-01-28 | 无锡海特铝业有限公司 | Aluminium alloy with high strength and excellent cutting property and preparation method thereof |
| CN105838943A (en) * | 2016-05-31 | 2016-08-10 | 广西南南铝加工有限公司 | Al-Mg-Si aluminum alloy and extrusion method for sectional bar of Al-Mg-Si aluminum alloy |
| CN107326227A (en) * | 2017-08-14 | 2017-11-07 | 山东南山铝业股份有限公司 | Rail transit vehicle body skirtboard aluminium alloy extrusions and its manufacture method |
| CN108118210A (en) * | 2017-11-28 | 2018-06-05 | 中铝材料应用研究院有限公司 | A kind of processing method of aluminium alloy and its extrudate |
| CN111168021A (en) * | 2019-12-11 | 2020-05-19 | 山东创新金属科技有限公司 | Casting process of aluminum alloy round ingot for forging hub |
| CN111560546A (en) * | 2020-04-29 | 2020-08-21 | 广东凤铝铝业有限公司 | Aluminum alloy with high crushing performance and preparation method of section bar of aluminum alloy |
Non-Patent Citations (1)
| Title |
|---|
| 谢水生等: "《简明铝合金加工手册》", 31 December 2016, 冶金工业出版社 * |
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