CN113088773A - High-strength aluminum alloy and production process and application thereof - Google Patents
High-strength aluminum alloy and production process and application thereof Download PDFInfo
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- CN113088773A CN113088773A CN202110246445.8A CN202110246445A CN113088773A CN 113088773 A CN113088773 A CN 113088773A CN 202110246445 A CN202110246445 A CN 202110246445A CN 113088773 A CN113088773 A CN 113088773A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- 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 invention relates to the technical field of alloy material preparation, and discloses a high-strength aluminum alloy which comprises, by mass, 0.95-1.15% of Si, less than or equal to 0.3% of Fe, 0.4-0.5% of Cu, 0.4-0.55% of Mn, 0.85-1.1% of Mg0.1%, 0.1-0.2% of Cr0.01-0.1% of Ti, less than or equal to 0.05% of Zr, less than or equal to 0.25% of Zn, and the balance of Al. The mechanical property of the high-strength aluminum alloy claimed by the invention is that Rp is more than or equal to 345MPa, Rm is more than or equal to 380MPa, A is more than or equal to 10 percent, and the aluminum alloy is adopted as a raw material when a control arm and a steering knuckle are forged, so that the products such as the control arm and the steering knuckle can be further lightened.
Description
Technical Field
The invention relates to the technical field of alloy materials, in particular to a high-strength aluminum alloy and a production process and application thereof.
Background
With the outstanding energy problem, automobiles gradually develop towards the direction of light weight, and the adoption of aluminum alloy products to replace steel products is an important means for light weight of the automobiles. In particular, the control arm and the steering knuckle in the automobile chassis are made of steel products in the past, and the control arm and the steering knuckle are used for each type of automobile, so that the control arm, the steering knuckle and other aluminum products for popularizing the forging process have wide prospects.
At present, the control arm and the steering knuckle produced by adopting a forging process generally use 6082 aluminum alloy in GB/T3190 as a raw material, and the 6082 aluminum alloy belongs to aluminum alloy for forging and has the advantages of high strength, good forgeability, good corrosion resistance and the like, but because the 6082 aluminum alloy belongs to general aluminum alloy, the following problems also exist when the 6082 aluminum alloy is used for producing control arm and steering knuckle forgings:
(1) si and Mg are the main alloying elements of 6082, both of which are present in the alloy as Mg: si in a ratio of 1.73:1 to form Mg2Si compound, which has strengthening effect on the alloy, 6082 alloy element has a large range, and Mg is mixed according to upper and lower limits when Si and Mg are mixed2Si fluctuates in the range of 0.95-1.9% (mass fraction, the same below), which finally causes the performance of the product to generate larger fluctuation;
(2)6082 the Cu content is less than or equal to 0.1%, the formed copper compounds are less, and the strength of the alloy is lower;
(3) mn can inhibit recrystallization in the solid solution process of the alloy and prevent a coarse crystal ring from exceeding the standard, but the upper limit of Mn content of the 6082 alloy is higher, if the Mn content is not properly controlled, segregation is easily caused, and the performance of each part of the product is not uniform;
(4) cr can also inhibit recrystallization in the solid solution process of the alloy, so that the standard exceeding of coarse crystal rings is prevented, the effect is better when the Cr is added with Mn, the lower limit of Cr is not specified in 6082, when the alloy does not contain Cr, the combined action of Mn and Cr cannot be exerted, and the product is easy to recrystallize in the solid solution process, so that the standard exceeding of the coarse crystal rings is caused.
Therefore, how to provide a high strength aluminum alloy with excellent mechanical properties is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides an aluminum alloy with excellent mechanical properties such as yield strength, tensile strength and elongation, a preparation method of the aluminum alloy, and application of the aluminum alloy in automobile chassis control arms and steering knuckle forgings.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-strength aluminum alloy comprises, by mass, 0.95-1.15% of Si, not more than 0.3% of Fe, 0.4-0.5% of Cu, 0.4-0.55% of Mn, 0.85-1.1% of Mg, 0.1-0.2% of Cr, 0.01-0.1% of Ti, not more than 0.05% of Zr, not more than 0.25% of Zn, and the balance of Al.
Si and Mg in alloy as Mg2Si exists in the form of Mg: si in a ratio of 1.73:1 to form Mg2Si compound with Mg2The strength of the alloy is increased with the increase of the Si content, but Mg2The solid solubility of Si in the alloy has an upper limit and can not improve Mg infinitely2Si content to improve the strength of the alloy, and Mg should be added to obtain an alloy with higher strength2A reasonable range is sought around the upper solid solubility limit of Si.
The strength of the alloy can be further improved by adding Cu into the alloy, but when the Cu content exceeds 0.5%, the intergranular corrosion of the material is increased, so that the product suddenly fails in operation, and therefore, the Cu content is determined to be capable of improving the strength of the alloy and not increasing the intergranular corrosion.
Although Mn acts to suppress recrystallization during the solid solution process of the alloy and ultimately suppresses coarse grain rings, Mn is likely to segregate in the alloy and cause non-uniformity in properties at each site of the alloy, so the upper limit of the Mn addition amount should be strictly controlled.
In the solid solution process of the alloy, Cr also plays a role in inhibiting recrystallization, and finally achieves the purpose of inhibiting coarse-grained rings, but the recrystallization inhibiting effect of Cr is not as strong as that of Mn, and the inhibition effect of Mn is not as strong as that of adding Mn and Cr at the same time, so the content of Cr needs to be controlled, Cr and Mn form a certain proportion to achieve the optimal recrystallization inhibiting effect, and finally the coarse-grained rings are inhibited.
The invention adjusts the contents of Si and Mg to ensure that the content of Si is between 0.95 and 1.15 percent and the content of Mg is between 0.85 and 1.1 percent so as to achieve the purpose of Mg2Si content is 1.34-1.74%, and Mg is added to reduce the fluctuation of mechanical properties of the alloy by reducing the range of alloy elements2The lower limit of Si is adjusted from 0.95% to 1.34%, thus achieving the purpose of increasing the strength of the alloy; the Cu content is adjusted to 0.4-0.5%, the strength of the alloy is further improved, and intergranular corrosion of the alloy is prevented from being aggravated; the upper limit of Mn is adjusted downwards to enable the content of Mn to be between 0.4 and 0.55 percent, and the lower limit of Cr is adjusted upwards to enable the content of Cr to be between 0.1 and 0.2 percent, so that Mn and Cr are combined to inhibit recrystallization in the solid solution process of the alloy, and the aim of inhibiting coarse crystal rings is achieved.
Preferably, in the above-mentioned one high-strength aluminum alloy, the composition includes, in mass%, si 1.07%, Fe 0.2%, Cu 0.42%, Mn 0.5%, Mg 0.94%, Cr 0.14%, Ti 0.034%, Zr 0.015%, Zn 0.001%, and Al 96.68%.
Preferably, in the above one high strength aluminum alloy, Si forms Mg with Mg2The Si content accounts for 1.34-1.74% of the total mass of the material.
The invention also discloses a production process of the high-strength aluminum alloy, which comprises the following steps:
(1) preparing materials: weighing the raw materials and the foundry returns according to the mass percentage for standby application, wherein the addition amount of the foundry returns is not more than 70 percent of the total mass of the charging materials;
(2) putting into a furnace for melting: putting the foundry returns into a melting furnace, and adding the raw materials of each component after the foundry returns are melted;
(3) electromagnetic stirring: after the raw materials are completely melted, performing electromagnetic stirring until the raw materials are uniformly mixed to obtain aluminum liquid;
(4) refining and degassing: adding a refining agent according to 1% of the total mass of the charging materials, enabling a refining rod to move along an S-shaped route, refining and degassing in the furnace for 30min, standing for 30min after finishing refining, and slagging off to greatly improve the quality of molten aluminum so as to improve the performance of the aluminum alloy material;
(5) casting an aluminum bar: after slagging off is finished, oil gas slip casting is started, the casting temperature is set to be 695 plus 705 ℃, the degassing parameter flow is 60L/min, the rotating speed is 350 revolutions, the top end of the filter box is heated to ensure the temperature of aluminum water, a double-layer filtering mode is adopted, the hydrogen content is less than or equal to 0.12ml/100g (namely, the hydrogen content does not exceed 0.12ml per 100g of aluminum by dehydrogenation) in terms of the aluminum addition amount in the front 30 meshes and the rear 50 meshes, and the casting time is 70 min;
(6) ultrasonic flaw detection and homogenization: carrying out full water immersion ultrasonic flaw detection after the aluminum bar is cast, and homogenizing the aluminum bar qualified for flaw detection in a homogenizing furnace;
(7) cutting short rods: cutting the aluminum bar into the length required by extrusion, cutting the aluminum bar unqualified for ultrasonic flaw detection, performing flaw detection on the short bar again, and removing the defective position;
(8) turning and extruding: turning a short bar, removing a segregation layer of the cast bar, heating, extruding and cutting the aluminum bar, and packaging after the performance test is qualified.
Preferably, in the above production process of a high strength aluminum alloy, the frequency of the electromagnetic stirring in step (3) is 0.5-0.85Hz, the stirring time is 45-75min, the stirring strength is 65-85%, and the reversing time is 180-300 s.
Preferably, in the above production process of a high-strength aluminum alloy, after the electromagnetic stirring, the method further comprises a component detection step: and (4) analyzing the components of the aluminum liquid treated in the step (3), taking the aluminum liquid out of the furnace by using a sampling spoon, pouring the aluminum liquid into a mold, detecting the aluminum liquid by using a direct-reading spectrometer after the aluminum liquid is solidified and cooled, performing a refining degassing process after the components are qualified, and adjusting the components if the components are not qualified.
Preferably, in the production process of the high-strength aluminum alloy, 16 detection points are set in the ultrasonic flaw detection in the step (6), and the rotating speed of the rod is 80-120 rpm; the homogenization temperature is 525 ℃ and 535 ℃, the homogenization time is 7.5-8.5h, and the water cooling is 180 ℃ and 240 min.
Preferably, in the production process of the high-strength aluminum alloy, the heating in the step (8) is performed so that the temperatures of the head, the middle and the tail of the aluminum bar are 505 ℃, 485 ℃ and 465 ℃ respectively;
the beneficial effects of the above technical scheme are: during the extrusion process, the deformation energy is converted into heat, which causes the temperature of the bar stock to rise, and in order to keep the temperature of the extruded bar stock constant, the head, the middle and the tail of the cast bar to be extruded are respectively heated to 505 ℃, 485 ℃ and 465 ℃.
The parameters of the extrusion process are set as follows: preheating an extrusion die to 470 ℃, preheating an extrusion cylinder to 430 ℃, extruding at the speed of 10mm/s and upsetting pressure of more than or equal to 80kg/cm2Air cooling for 5-6m, and keeping the pressure residual for 30 +/-5 mm.
The invention also discloses application of the high-strength aluminum alloy, and the aluminum alloy is manufactured into a control arm and a steering knuckle for a vehicle by adopting a forging process.
Preferably, in the application of the high-strength aluminum alloy, the forged control arm and the forged steering knuckle are subjected to T6 treatment and are subjected to solid solution in a grading mode, and the first stage is the solid solution treatment at 500 ℃ for 30 min; the second stage is solution treatment at 540 ℃ for 60 min; the aging parameter is 180 ℃ multiplied by 300 min.
The beneficial effects of the above technical scheme are: solid solution is carried out in a grading mode, uniform recrystallization is carried out on the product in a first stage of solid solution, abnormal growth of crystal grains is avoided, after the uniform recrystallization is finished, the solid solution temperature is quickly raised to a second stage, because the uniform recrystallization is carried out in the first stage, the abnormal growth of the crystal grains in the second stage is obviously inhibited, namely, a coarse crystal ring is not obviously grown; simultaneously make Mg2The compound of Si and Cu is fully dissolved in the matrix, and finally, the mechanical performance of the product can reach Rp0.2 more than or equal to 345MPa, Rm more than or equal to 380MPa and A more than or equal to 10 percent through aging treatment at 180 ℃ for 300 min.
According to the technical scheme, compared with the prior art, the invention discloses the high-strength aluminum alloy which has the following beneficial effects:
(1) the 6082 alloy is prepared according to GB/T3190, the obtained mechanical property is that Rp0.2 is more than or equal to 260MPa, Rm is more than or equal to 310MPa, and A is more than or equal to 8 percent, while the mechanical property of the aluminum alloy is that Rp0.2 is more than or equal to 345MPa, Rm is more than or equal to 380MPa, and A is more than or equal to 10 percent, and the yield strength is improved by 32.7 percent; the alloy of the invention is adopted as raw materials when forging control arms and steering knuckles, and the products of the control arms and the steering knuckles can be further lightened.
(2) In the solid solution process of the aluminum alloy, abnormal grain growth is easily generated on the surface of a part, the aluminum alloy is commonly called as a coarse crystal ring, the performance of a product is seriously damaged by the coarse crystal ring, 6082 aluminum alloy in GB/T3190, the coarse crystal ring is divided into two grades, the common grade is not more than 8mm, the high grade is not more than 5mm, the coarse crystal ring can be further increased when the raw material is used for producing products such as a control arm, a steering knuckle and the like, the coarse crystal ring of the alloy material can be eliminated by adjusting the proportion of Mn and Cr elements, the alloy manufactured by the method is used as the raw material, and the depth of the coarse crystal ring is not more than 3mm when the control arm and the steering knuckle are.
(3) The addition of Cu can further improve the strength of the alloy, for example, EN AW 6110A alloy, the content of Cu is 0.3% -0.8%, when the content of Cu is the upper limit, a product meets substances such as a snow remover, deeper intergranular corrosion can be formed on the surface of the alloy, and spalling corrosion is generated at the same time.
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.
Examples
(1) Preparing materials: selecting a returned material, a pure aluminum ingot and alloy elements as raw materials;
preparing a returned material: the proportion of the returned materials in the total weight of the charging materials is less than or equal to 70 percent, wherein the waste materials, the aluminum scraps and the flashes generated in the production and processing can be used as the returned materials to be added, the returned materials are required to be dry in surface and free of oil stains, and the returned materials can be returned after the aluminum scraps are subjected to a briquetting process;
preparing pure aluminum ingots and alloy elements: substances with the trade marks of Al99.7 (aluminum), 3303 (silicon), Cu50 (copper), Mn80 (manganese), 9990 (magnesium), Cr75 (chromium) and Ti5 (titanium) are respectively selected as raw materials, iron, zirconium and zinc are used as impurities to be controlled, and the addition amount of the raw materials of each component is shown in Table 1.
(2) Putting into a furnace for melting: the used melting furnace can be used when the furnace temperature reaches 780-820 ℃, ash in the furnace chamber is cleaned before feeding, the returned material is fed into the furnace firstly, and pure aluminum ingots and various alloy elements are added after melting.
(3) Electromagnetic stirring: after the raw materials are completely melted, performing electromagnetic stirring;
the parameters of the electromagnetic stirring were as follows: the frequency is 0.85Hz, the stirring time is 60min, the stirring intensity is 85 percent, the reversing time is 240s (the stirring direction is changed once every 240 s), and the components are ensured to be uniform after melting.
(4) Component detection: and (3) analyzing the components of the stirred aluminum liquid, taking the aluminum liquid out of the furnace by using a sampling spoon, pouring the aluminum liquid into a mold, detecting by using a direct-reading spectrometer after the aluminum liquid is solidified and cooled, entering the next procedure after the components are qualified, and adjusting the components if the components are not qualified.
(5) Refining and degassing: refining and degassing in the furnace for 30min, adding a refining agent according to 1% of the weight of the charged furnace, allowing the refining rod to move along an S-shaped route, standing for 30min after the completion of the S-shaped route, and slagging off.
(6) Casting an aluminum bar: and after slagging off is finished, oil-gas slip casting is started, the casting temperature is 695-.
(7) Ultrasonic flaw detection: and after the aluminum bar is cast, carrying out full-water immersion ultrasonic flaw detection, wherein 16 detection points are arranged, and the bar rotating speed is 100 rpm/min.
(8) Homogenizing: placing the aluminum bar qualified for flaw detection into a homogenizing furnace for homogenization;
the parameters of homogenization were as follows: the homogenization temperature is 525-.
(9) Cutting short rods: cutting an aluminum bar to a length 1100 required for extrusion+3mm for ultrasonic flaw detectionAnd cutting the unqualified aluminum bar into short bars, and then carrying out short bar flaw detection again to remove the defective positions.
(10) Turning a vehicle: turning short bar, removing aluminum bar segregation layer, 3.5mm unilateral, 247 size+0.5mm。
(11) Heating and extruding: detecting the temperature of the cast rod after heating, wherein the head, middle and tail temperatures are 505 ℃, 485 ℃ and 465 ℃ respectively;
preheating an extrusion die to 470 ℃, preheating an extrusion cylinder to 430 ℃, and spraying acetylene on a contact surface to avoid bonding an extrusion rod and an aluminum bar together after extrusion;
the extrusion parameters were as follows: the extrusion speed is 10mm/s, and the upsetting pressure is more than or equal to 80kg/cm2And residual pressing: 30 +/-5 mm, and air cooling for about 6 m;
(12) cutting the head and the tail: the tail is cut off by 900mm, and the head is cut off by 300 mm.
(13) And (3) performance detection: detecting the mechanical property of the extrusion rod in the T6 state, and transferring to the subsequent steps after the mechanical property is qualified.
(14) Packaging: and removing slight scratches or other defects on the surface of the extruded aluminum bar by adopting a manual polishing mode, and packaging the aluminum bar qualified by detection to obtain the high-strength aluminum alloy 6M82 (the invention obtains the embodiments 1-3 by changing the addition amount of each component).
(15) Forging: the high-strength aluminum alloy 6M82 is used as a raw material for forging the control arm and the steering knuckle, and the control arm and the steering knuckle are manufactured by adopting a forging process.
(16) And (3) heat treatment: carrying out T6 treatment on the forged control arm and the forged steering knuckle, and carrying out solid solution in a grading mode, wherein the first stage is the solid solution treatment at 500 ℃ for 30 min; the second stage is solution treatment at 540 ℃ for 60 min; the aging parameter is 180 ℃ multiplied by 300 min.
Comparative example
6082 alloy is prepared according to GB/T3190, and raw materials of components of the 6082 alloy are shown in Table 1.
TABLE 1 compositions of raw materials for examples and comparative examples
| 6082 alloy | 6M82 alloy | Example 1 | Example 2 | Example 3 | |
| Si | 0.7-1.3 | 0.95-1.15 | 0.99 | 1.02 | 1.05 |
| Fe | ≤0.5 | ≤0.3 | 0.2 | 0.22 | 0.21 |
| Cu | ≤0.1 | 0.4-0.5 | 0.42 | 0.44 | 0.47 |
| Mn | 0.4-1.0 | 0.4-0.55 | 0.45 | 0.49 | 0.52 |
| Mg | 0.6-1.2 | 0.85-1.1 | 0.92 | 0.95 | 1.01 |
| Cr | ≤0.25 | 0.1-0.2 | 0.12 | 0.14 | 0.15 |
| Ti | ≤0.1 | 0.01-0.1 | 0.034 | 0.03 | 0.033 |
| Zr | —— | ≤0.05 | 0.015 | 0.014 | 0.014 |
| Zn | ≤0.2 | ≤0.25 | 0.001 | 0.001 | 0.001 |
Table 2 results of performance testing
| 6082 alloy | 6M82 alloy | Example 1 | Example 2 | Example 3 | |
| Yield strength (MPa) | ≥260Mpa | ≥345 | 375.7 | 378.9 | 385.7 |
| Tensile strength (MPa) | ≥310Mpa | ≥380 | 417.6 | 420.8 | 426.7 |
| Elongation (%) | ≥8 | ≥10 | 14.3 | 13.3 | 13.1 |
| Hardness (HB) | ≥90 | ≥104 | 115 | 116 | 118 |
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the scheme disclosed by the embodiment, the scheme corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The high-strength aluminum alloy is characterized by comprising, by mass, 0.95-1.15% of Si, not more than 0.3% of Fe, 0.4-0.5% of Cu, 0.4-0.55% of Mn, 0.85-1.1% of Mg, 0.1-0.2% of Cr, 0.01-0.1% of Ti, not more than 0.05% of Zr, not more than 0.25% of Zn, and the balance of Al.
2. The high-strength aluminum alloy according to claim 1, comprising, in mass%, Si 1.07%, Fe 0.2%, Cu 0.42%, Mn 0.5%, Mg 0.94%, Cr 0.14%, Ti 0.034%, Zr 0.015%, Zn 0.001%, and Al 96.68%.
3. The high-strength aluminum alloy according to claim 1 or 2, wherein Mg formed of Si and Mg2The Si content accounts for 1.34-1.74% of the total mass of the material.
4. A process for producing a high strength aluminum alloy as defined in any one of claims 1 to 3, comprising the steps of:
(1) preparing materials: weighing the raw materials and the foundry returns according to the mass percentage for standby application, wherein the addition amount of the foundry returns is not more than 70 percent of the total mass of the charging materials;
(2) putting into a furnace for melting: putting the foundry returns into a melting furnace, and adding the raw materials of each component after the foundry returns are melted;
(3) electromagnetic stirring: after the raw materials are completely melted, performing electromagnetic stirring until the raw materials are uniformly mixed to obtain aluminum liquid;
(4) refining and degassing: adding a refining agent according to 1% of the total mass of the charging materials, enabling a refining rod to go through an S-shaped route, refining and degassing in a furnace for 30min, standing for 30min after finishing refining, and slagging off;
(5) casting an aluminum bar: after slagging off is finished, oil-gas slip casting is started, the casting temperature is set to be 695 plus 705 ℃, the degassing parameter flow is 60L/min, the rotating speed is 350 revolutions, the top end of the filter box is heated to ensure the temperature of aluminum water, a double-layer filtering mode is adopted, the hydrogen content is less than or equal to 0.12ml/100g in terms of aluminum addition amount after the first 30 meshes, and the casting time is 70 min;
(6) ultrasonic flaw detection and homogenization: carrying out full water immersion ultrasonic flaw detection after the aluminum bar is cast, and homogenizing the aluminum bar qualified for flaw detection in a homogenizing furnace;
(7) cutting short rods: cutting the aluminum bar into the length required by extrusion, cutting the aluminum bar unqualified for ultrasonic flaw detection, performing flaw detection on the short bar again, and removing the defective position;
(8) turning and extruding: and (4) turning a short bar, removing a cast bar segregation layer, heating, extruding and cutting the aluminum bar, and packaging after the performance detection is qualified.
5. The process for producing a high-strength aluminum alloy as claimed in claim 4, wherein the frequency of the electromagnetic stirring in step (3) is 0.5 to 0.85Hz, the stirring time is 45 to 75min, the stirring intensity is 65 to 85%, and the reversing time is 180-300 s.
6. The production process of a high-strength aluminum alloy according to claim 4, further comprising a composition detection step after the electromagnetic stirring: and (4) analyzing the components of the aluminum liquid treated in the step (3), taking the aluminum liquid out of the furnace by using a sampling spoon, pouring the aluminum liquid into a mold, detecting the aluminum liquid by using a direct-reading spectrometer after the aluminum liquid is solidified and cooled, performing a refining degassing process after the components are qualified, and adjusting the components if the components are not qualified.
7. The process for producing a high-strength aluminum alloy as claimed in claim 4, wherein 16 detection points are provided for the ultrasonic flaw detection in the step (6), and the bar rotation speed is 80-120 rpm; the homogenization temperature is 525 ℃ and 535 ℃, the homogenization time is 7.5-8.5h, and the water cooling is 180 ℃ and 240 min.
8. The process for producing a high-strength aluminum alloy as claimed in claim 4, wherein the heating in the step (8) is performed so that the temperatures of the head, the middle and the tail of the aluminum rod are 505 ℃, 485 ℃ and 465 ℃ respectively;
the parameters of the extrusion process are set as follows: preheating an extrusion die to 470 ℃, preheating an extrusion cylinder to 430 ℃, extruding at the speed of 10mm/s and upsetting pressure of more than or equal to 80kg/cm2Air cooling for 5-6m, and keeping the pressure residual for 30 +/-5 mm.
9. Use of a high strength aluminium alloy according to any one of claims 1 to 3, wherein the aluminium alloy is formed into control arms and steering knuckles for vehicles by forging.
10. The use of a high strength aluminum alloy according to claim 9, wherein the forged control arm and knuckle are subjected to T6 treatment, and solid solution is performed in a graded manner, and the first stage is solid solution treatment at 500 ℃ for 30 min; the second stage is solution treatment at 540 ℃ for 60 min; the aging parameter is 180 ℃ multiplied by 300 min.
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1263566A (en) * | 1998-04-08 | 2000-08-16 | 本田技研工业株式会社 | Method of manufacturing aluminum alloy for flattening material and aluminum alloy flattening material for automobiles |
| CN102319756A (en) * | 2011-09-05 | 2012-01-18 | 西南铝业（集团）有限责任公司 | A kind of manufacturing approach of rods and bars of aluminium alloy |
| CN103173664A (en) * | 2013-04-19 | 2013-06-26 | 上海嘉朗实业有限公司 | Al-Mg-Si-Cu alloy material and application thereof on aluminum control arm of automobile |
| CN104073689A (en) * | 2013-03-29 | 2014-10-01 | 株式会社神户制钢所 | Aluminum alloy forged material for automobile and method for manufacturing the same |
| CN106062225A (en) * | 2015-02-10 | 2016-10-26 | 昭和电工株式会社 | Aluminum alloy plastic worked article, method for manufacturing same, and automobile component |
| CN106350708A (en) * | 2016-08-31 | 2017-01-25 | 无锡海特铝业有限公司 | High-strength coarse-grain-ring-free aluminum alloy bar for automotive control arm and preparation method of aluminum alloy bar |
| US20170314113A1 (en) * | 2014-11-05 | 2017-11-02 | Constellium Valais Sa | Ultra high strength 6xxx forged aluminium alloys |
| CN107619973A (en) * | 2017-10-31 | 2018-01-23 | 辽宁忠旺集团有限公司 | A kind of process of aluminium alloys for automobile control arm performance boost |
| CN108411164A (en) * | 2018-03-12 | 2018-08-17 | 广西平果百矿高新铝业有限公司 | A kind of parking systems aluminium alloy extrusions and its manufacturing method |
| CN110129632A (en) * | 2019-06-25 | 2019-08-16 | 江苏亚太航空科技有限公司 | A kind of screw compressor sound disk aluminum profile processing method |
| CN110355225A (en) * | 2019-06-26 | 2019-10-22 | 辽宁忠旺集团有限公司 | A kind of extrusion process of automobile-used high strength alumin ium alloy bending profile |
| CN110983216A (en) * | 2019-12-26 | 2020-04-10 | 辽宁忠旺集团有限公司 | Process for reducing coarse crystal generation on surface of automotive extrusion forging rod |
| JP2020066752A (en) * | 2018-10-22 | 2020-04-30 | 昭和電工株式会社 | Al-Mg-Si-BASED ALUMINUM ALLOY EXTRUSION MATERIAL AND METHOD FOR MANUFACTURING THE SAME |
| CN111542627A (en) * | 2017-12-21 | 2020-08-14 | 肯联铝业机床杰钦有限公司 | 6xxx aluminum alloy extrusion forging stock and manufacturing method thereof |
| CN111647780A (en) * | 2020-07-21 | 2020-09-11 | 军材科技(天津)有限公司 | High-strength 6-series aluminum alloy and preparation method and application thereof |
-
2021
- 2021-03-05 CN CN202110246445.8A patent/CN113088773A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1263566A (en) * | 1998-04-08 | 2000-08-16 | 本田技研工业株式会社 | Method of manufacturing aluminum alloy for flattening material and aluminum alloy flattening material for automobiles |
| CN102319756A (en) * | 2011-09-05 | 2012-01-18 | 西南铝业（集团）有限责任公司 | A kind of manufacturing approach of rods and bars of aluminium alloy |
| CN104073689A (en) * | 2013-03-29 | 2014-10-01 | 株式会社神户制钢所 | Aluminum alloy forged material for automobile and method for manufacturing the same |
| CN103173664A (en) * | 2013-04-19 | 2013-06-26 | 上海嘉朗实业有限公司 | Al-Mg-Si-Cu alloy material and application thereof on aluminum control arm of automobile |
| US20170314113A1 (en) * | 2014-11-05 | 2017-11-02 | Constellium Valais Sa | Ultra high strength 6xxx forged aluminium alloys |
| CN106062225A (en) * | 2015-02-10 | 2016-10-26 | 昭和电工株式会社 | Aluminum alloy plastic worked article, method for manufacturing same, and automobile component |
| CN106350708A (en) * | 2016-08-31 | 2017-01-25 | 无锡海特铝业有限公司 | High-strength coarse-grain-ring-free aluminum alloy bar for automotive control arm and preparation method of aluminum alloy bar |
| CN107619973A (en) * | 2017-10-31 | 2018-01-23 | 辽宁忠旺集团有限公司 | A kind of process of aluminium alloys for automobile control arm performance boost |
| CN111542627A (en) * | 2017-12-21 | 2020-08-14 | 肯联铝业机床杰钦有限公司 | 6xxx aluminum alloy extrusion forging stock and manufacturing method thereof |
| CN108411164A (en) * | 2018-03-12 | 2018-08-17 | 广西平果百矿高新铝业有限公司 | A kind of parking systems aluminium alloy extrusions and its manufacturing method |
| JP2020066752A (en) * | 2018-10-22 | 2020-04-30 | 昭和電工株式会社 | Al-Mg-Si-BASED ALUMINUM ALLOY EXTRUSION MATERIAL AND METHOD FOR MANUFACTURING THE SAME |
| CN110129632A (en) * | 2019-06-25 | 2019-08-16 | 江苏亚太航空科技有限公司 | A kind of screw compressor sound disk aluminum profile processing method |
| CN110355225A (en) * | 2019-06-26 | 2019-10-22 | 辽宁忠旺集团有限公司 | A kind of extrusion process of automobile-used high strength alumin ium alloy bending profile |
| CN110983216A (en) * | 2019-12-26 | 2020-04-10 | 辽宁忠旺集团有限公司 | Process for reducing coarse crystal generation on surface of automotive extrusion forging rod |
| CN111647780A (en) * | 2020-07-21 | 2020-09-11 | 军材科技(天津)有限公司 | High-strength 6-series aluminum alloy and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李念奎等: "《铝合金材料及其热处理技术》", 30 April 2012, 冶金工业出版社 * |
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