CN111155000A - Rapid heat treatment strengthening high-strength and high-toughness aluminum alloy material for die-casting thin-walled piece and preparation method and application thereof - Google Patents
Rapid heat treatment strengthening high-strength and high-toughness aluminum alloy material for die-casting thin-walled piece and preparation method and application thereof Download PDFInfo
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- 239000000956 alloy Substances 0.000 title claims abstract description 100
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 58
- 238000010438 heat treatment Methods 0.000 title claims abstract description 32
- 238000004512 die casting Methods 0.000 title claims abstract description 27
- 238000005728 strengthening Methods 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000005266 casting Methods 0.000 claims abstract description 23
- 239000012535 impurity Substances 0.000 claims abstract description 16
- 238000003723 Smelting Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 63
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 239000010949 copper Substances 0.000 claims description 23
- 239000011572 manganese Substances 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 20
- 239000011701 zinc Substances 0.000 claims description 20
- 239000011777 magnesium Substances 0.000 claims description 18
- 239000010936 titanium Substances 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 229910052749 magnesium Inorganic materials 0.000 claims description 10
- 229910052748 manganese Inorganic materials 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- 239000000654 additive Substances 0.000 claims description 8
- 230000000996 additive effect Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 239000000155 melt Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229910052712 strontium Inorganic materials 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000007872 degassing Methods 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 claims description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 2
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 claims description 2
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 claims description 2
- YNDGDLJDSBUSEI-UHFFFAOYSA-N aluminum strontium Chemical compound [Al].[Sr] YNDGDLJDSBUSEI-UHFFFAOYSA-N 0.000 claims description 2
- -1 aluminum-manganese Chemical compound 0.000 claims description 2
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- 238000013461 design Methods 0.000 abstract description 3
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- 239000000463 material Substances 0.000 description 7
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- 230000008901 benefit Effects 0.000 description 4
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- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- 229910016343 Al2Cu Inorganic materials 0.000 description 1
- 229910019752 Mg2Si Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
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Abstract
The invention relates to a rapid heat treatment strengthening high-strength and high-toughness aluminum alloy material for die-casting thin-walled parts and a preparation method and application thereof. The aluminum alloy material comprises the following components in percentage by weight: 8 to 11 portions of Si, 0.4 to 1.2 portions of Mg, 1.5 to 3.0 portions of Cu, 0.5 to 2.0 portions of Zn, 0.05 to 0.5 portion of Fe, 0.3 to 0.6 portion of Mn, 0.2 portion of Ti, 0.1 portion of Sr, and the balance of Al and other impurities less than 1 percent. Prepared by smelting, casting and rapid heat treatment. The aluminum alloy material disclosed by the invention realizes excellent mechanical properties by combining scientific and reasonable component design with an optimized rapid heat treatment process.
Description
Technical Field
The invention relates to the field of aluminum alloy materials and preparation and forming thereof, in particular to a rapid heat treatment strengthening high-strength and high-toughness aluminum alloy material for die-casting thin-walled parts and a preparation method and application thereof.
Background
With the popularization of 5G communication technology, communication and consumer electronics products are developing towards light weight and high performance, and structural members are required to be thinner in wall thickness, higher in strength and more complex in structure. The die casting has the advantages of fast pace, low cost, accurate forming and the like, and is widely applied to the fields of electronics, communication and the like. In high-integration electronic products represented by smart phones, traditional die-casting aluminum alloy materials such as ADC12 and A380 are widely applied. However, with the continuous development of the communication and consumer electronics industries, the traditional materials have been increasingly difficult to meet the requirements of strength, plasticity, heat conductivity and other properties. Therefore, new die-casting aluminum alloy materials with special properties and the preparation process thereof become the current research hot spot.
The aluminum alloy strengthening method mainly comprises solid solution strengthening, dispersion strengthening, fine grain strengthening and deformation strengthening. The die casting cannot be subjected to deformation processing, and the mechanical property cannot be improved in a processing hardening mode, so that the improvement of the mechanical property by the alloy component optimization design has important significance. In addition, aluminum alloys can also be strengthened by heat treatment, but in the production process of such parts, because the wall thickness is thin, deformation is easily generated in the heat treatment process, and the parts are scrapped.
Patent CN107739916A discloses a die-casting aluminum alloy for a middle plate of a high-yield and high-elongation mobile phone, wherein the content (wt%) of each element of the alloy is as follows: si: 12.00 to 14.00 percent; cu: 0.05-3%; fe: 0.4% -0.80%, Mg: 0.00-0.5%; the rest impurities are controlled below 0.05 percent, and the balance is Al. The yield strength is more than 150MPa, the tensile strength is more than 300MPa, and the elongation is 8-10%. The alloy has high heat conductivity coefficient reaching 180W/m.K, but needs to be subjected to aging treatment for 4 hours. The alloy has limited improvement of yield strength, and needs heat treatment although the heat conductivity coefficient is higher, thereby increasing the production difficulty.
Patent CN104946940A discloses a die-casting aluminum alloy and a preparation method thereof, wherein the content (wt%) of each element of the alloy is as follows: si5.0-8.0%, Mg0.5-3.0%, Ti0.15-0.5%, Cu0.2-1.5wt%, Re0.22-0.55%, and Al in balance. The mechanical properties are as follows: the yield strength is more than or equal to 165MPa, the tensile strength is more than or equal to 270MPa, the elongation is more than or equal to 4.7 percent, and the impact toughness is more than or equal to 43KJ/m 2. The alloy solves the problem of poor impact toughness of the traditional alloy, but adds rare earth elements, thereby increasing the cost of raw materials.
The aluminum alloy material solves the problem of heat treatment deformation by optimizing alloy components and matching with rapid aging treatment. According to the invention, the thermal shaping step is adopted in the preparation process of the plate part in the mobile phone, the thermal shaping temperature is about 160-300 ℃, and the time is about 10-30s, so that the aluminum alloy can realize aging strengthening during the thermal shaping, the strengthening speed is very high, a thermal treatment process is not required to be added independently, and the thermal treatment deformation is avoided. Therefore, the aluminum alloy has the advantages of high strength, high toughness, short flow, accurate forming and the like, and has good economic benefit.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a rapid heat treatment strengthening high-strength and high-toughness aluminum alloy material for die-casting thin-walled parts and a preparation method and application thereof, wherein alloy elements of aluminum alloy are reasonably proportioned, and a proper amount of Si element is added to improve the fluidity of the material so as to ensure the casting performance of the material; the addition of Mg, Cu and the like can not only improve the content of solute elements, but also generate precipitated phases such as Mg2Si, Al2Cu and the like, thereby improving the alloy strength; a certain amount of Zn element is added, so that the driving force of aging strengthening is improved; a proper amount of elements such as Fe, Mn and the like are added to reduce the die sticking tendency; a small amount of Ti element is added to refine the crystal grains. On the premise of ensuring excellent casting performance, the aging strengthening speed of the alloy after die casting is improved, so that the aging heat treatment strengthening is realized by utilizing the original working procedures in the part preparation process flow. The die-casting aluminum alloy material has excellent casting performance, high strength and toughness and good economy, and is particularly suitable for manufacturing structural members of products such as communication products, electronic products and the like.
The yield strength of the alloy material in an as-cast state is more than 200MPa, the tensile strength is more than 340MPa, and the elongation is more than 3.5%; after rapid aging heat treatment, the yield strength can be stabilized above 230MPa, the tensile strength is greater than 360 MPa, and the elongation is greater than 3%. The strength is obviously improved after heat treatment; the elongation rate is reduced by about 10-15 percent and still kept at a higher level.
The purpose of the invention is realized by the following technical scheme:
a rapid heat treatment strengthening high-strength and high-toughness aluminum alloy material for die-casting thin-wall parts comprises the following components in percentage by weight: 8 to 11 portions of Si, 0.4 to 1.2 portions of Mg, 1.5 to 3.0 portions of Cu, 0.5 to 2.0 portions of Zn, 0.05 to 0.5 portion of Fe, 0.3 to 0.6 portion of Mn, 0.2 portion of Ti, 0.1 portion of Sr, and the balance of Al and other impurities less than 1 percent.
Further, the aluminum alloy material has a composition, in wt%, satisfying: 8.5 to 10.5 percent of Si, 0.6 to 1.1 percent of Mg, 1.5 to 2.6 percent of Cu1.8 to 1.8 percent of Zn and 0.15 to 0.35 percent of Fe.
Further, the high-strength and high-toughness aluminum alloy material also comprises: also contains Pb less than or equal to 0.05 percent, other impurities less than or equal to 0.05 percent individually, and total less than or equal to 0.4 percent.
The invention also provides a preparation method of the high-strength and high-toughness aluminum alloy material, which mainly comprises the steps of smelting, casting and rapid heat treatment.
Further, the smelting step comprises the following steps:
(1) putting the pure aluminum or the electrolytic aluminum liquid which is weighed and proportioned into a smelting furnace, and heating to 700-800 ℃; then adding Mn, Si, Cu, Fe, Ti and other raw materials according to the proportion, and uniformly stirring;
(2) under the temperature of 700 plus 760 ℃, introducing inert gas by using a blowing device, uniformly spraying the aluminum alloy refining agent into the melt, and carrying out degassing and deslagging treatment for 30-40 minutes; then adding Zn, Mg, Sr and other elements, and stirring uniformly.
(3) Skimming dross, standing for 20-60 minutes to obtain aluminum alloy melt for subsequent casting.
Further, the silicon in the raw materials is industrial silicon, instant silicon or aluminum-silicon intermediate alloy.
Further, manganese in the raw materials is an aluminum-manganese intermediate alloy or a manganese additive.
Further, the iron in the raw materials is an aluminum-iron intermediate alloy or an iron additive.
Further, the copper in the raw material is pure copper or aluminum-copper intermediate alloy or copper additive.
Further, the purity of magnesium in the raw material is 99.9% or more.
Furthermore, the purity of zinc in the raw materials is more than 99.99 percent;
furthermore, the strontium in the raw materials is an aluminum-strontium intermediate alloy.
Further, the titanium in the raw material is an aluminum-titanium intermediate alloy or a titanium additive.
Further, the inert gas is high-purity nitrogen or high-purity argon.
Further, the casting step is as follows: and casting the melt prepared in the smelting step into an alloy ingot for remelting or casting at the casting temperature of 650-750 ℃.
Further, the rapid heat treatment comprises the following steps: the effective strengthening is realized in an extreme time, the temperature is 160-300 ℃, and the time is 10-30 s.
Further, the temperature is 260 ℃ and the time is 12 s.
Further, the rapid heat treatment is preferably performed in an original step of the manufacturing process of the component itself without adding a new step.
The invention also aims to protect the application of the high-strength and high-toughness aluminum alloy material in parts with complex structures and thin-wall structures.
Furthermore, the high-toughness aluminum alloy material is used for producing consumer electronic parts such as smart phones and the like and parts such as communication cabinets, radiators and the like.
Compared with the prior art, the rapid heat treatment strengthening high-strength and high-toughness aluminum alloy material for die-casting thin-walled parts, provided by the invention, combines the optimized rapid heat treatment process through scientific and reasonable component design, preferably selects the addition amount of alloy elements Si, Zn, Mg, Cu, Fe, Mn and Ti, and can achieve excellent mechanical properties without adding expensive rare earth elements on the premise of ensuring the die-casting forming performance. Because the alloy has excellent fluidity, the alloy can be used for die-casting and producing parts with complex structures, and compared with the existing conventional die-casting aluminum alloy, the alloy has the following outstanding advantages:
(1) the aluminum alloy material disclosed by the invention has excellent mechanical properties and remarkable ultra-short time ultra-fast heat treatment aging strengthening characteristics, and the typical properties of the aluminum alloy material after being die-cast into a casting are as follows: the yield strength under the casting state is more than 200MPa, the tensile strength is more than 340MPa, and the elongation is more than 3.5 percent; after rapid aging heat treatment, the yield strength can be stabilized above 230MPa, the tensile strength is greater than 360 MPa, and the elongation is greater than 3%. The strength is obviously improved after heat treatment; the elongation rate is reduced by about 10-15 percent and still kept at a higher level.
(2) The aluminum alloy material has excellent casting forming performance and no die sticking tendency, and is suitable for industrial production of complex thin-wall parts when the mechanical property of the thin-wall aluminum alloy material is higher than that of the thin-wall aluminum alloy material.
(3) The aluminum alloy material provided by the invention does not need to add expensive rare earth elements to improve the mechanical property, and the characteristics of rapid aging heat treatment are matched with the actual production, so that the process path is optimized, and the process flow is shortened.
(4) The aluminum alloy material has good dimensional stability and is suitable for production and manufacturing of high-precision parts.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the present invention is not limited to these examples.
Example 1:
first, 4 alloy melts were prepared, wherein alloy 1, alloy 2 and alloy 3 were high toughness aluminum alloy materials of the present invention, and ADC12 was used as a comparison:
alloy 1: 8.5wt% of Si, 0.8wt% of Zn, 0.6wt% of Mg, 0.15wt% of Fe, 1.5wt% of Cu, 0.3wt% of Mn, 0.15wt% of Ti0.04 wt% of Sr, and the balance of Al and a small amount of unavoidable impurities.
Alloy 2: 9.5wt% of Si, 1.3wt% of Zn, 0.9wt% of Mg, 0.25wt% of Fe, 2wt% of Cu, 0.5wt% of Mn, 0.04wt% of Sr0, 0.15wt% of Ti, and the balance of Al and a small amount of inevitable impurities.
Alloy 3: 10.5wt% of Si, 1.8wt% of Zn, 1.1wt% of Mg1, 0.35wt% of Fe, 2.6wt% of Cu, 0.6wt% of Mn, 0.04wt% of Sr0, 0.15wt% of Ti, and the balance of Al and a small amount of unavoidable impurities.
ADC 12: 10wt% of Si, 0.88wt% of Zn, 0.25wt% of Mg, 0.8wt% of Fe, 1.7wt% of Cu, 0.2wt% of Mn, 0.05wt% of Ni0, 0.04wt% of Ti, and the balance of Al and a small amount of inevitable impurities.
A standard format batch was prepared as follows:
smelting: putting pure aluminum into a smelting furnace, heating to 760 ℃ for melting, then adding raw materials such as Mn, Si, Cu, Fe, Ti and the like according to the proportion, and stirring uniformly. Under the temperature of 700 plus 760 ℃, an injection device is utilized to introduce inert gas, the aluminum alloy refining agent is evenly injected into the melt, degassing and deslagging treatment are carried out for 30-40 minutes, then elements such as Zn, Mg, Sr and the like are added, and the mixture is evenly stirred. Skimming dross, standing for 20-40 minutes, and controlling the temperature of the melt to 710 ℃ to obtain the aluminum alloy melt.
Casting: preparing an aluminum alloy melt according to the steps, and preparing a batch of standard die-casting samples by using a 280-ton die-casting machine, wherein the casting temperature is 700 ℃.
Quick heat treatment: the alloy 1, 2 and 3 samples are subjected to hot shaping, namely hot shaping process treatment is carried out under actual production conditions, the temperature is 260 ℃, and the time is 12 seconds. The body is sampled to test the mechanical property.
The composition and average mechanical property data of each alloy are shown in the table 1:
TABLE 1 comparison of mechanical properties before and after rapid aging of different alloys
From the results in table 1, it can be seen that the strength of the aluminum alloy of the present invention is much higher than that of the conventional material ADC12, and the aluminum alloy can meet the requirements of communication and electronic products on structural materials. After the alloy is subjected to short-time aging strengthening, the yield strength and the tensile strength of the alloy are obviously improved, the elongation before aging is more than 3.5 percent, the elongation after aging is more than 3 percent, the elongation after aging is reduced by about 10 to 15 percent, and the elongation is still kept at a higher level. Therefore, the aluminum alloy material provided by the invention has excellent mechanical properties and obvious aging strengthening characteristics. The rapid aging strengthening characteristic of the material and the production flow of the thin-wall electronic structural part have good synergistic effect.
Example 2:
according to the smelting steps, a batch of the high-strength die-casting aluminum alloy is prepared, and the high-strength die-casting aluminum alloy is analyzed by a direct-reading spectrometer to obtain the following components:
alloy 1: 8.5wt% of Si, 0.8wt% of Zn, 0.6wt% of Mg, 0.15wt% of Fe, 1.5wt% of Cu, 0.3wt% of Mn, 0.15wt% of Ti0.04 wt% of Sr, and the balance of Al and a small amount of unavoidable impurities.
Alloy 2: 9.5wt% of Si, 1.3wt% of Zn, 0.9wt% of Mg, 0.25wt% of Fe, 2wt% of Cu, 0.5wt% of Mn, 0.04wt% of Sr0, 0.15wt% of Ti, and the balance of Al and a small amount of inevitable impurities.
Alloy 3: 10.5wt% of Si, 1.8wt% of Zn, 1.1wt% of Mg1, 0.35wt% of Fe, 2.6wt% of Cu, 0.6wt% of Mn, 0.04wt% of Sr0, 0.15wt% of Ti, and the balance of Al and a small amount of unavoidable impurities.
The alloy melt was poured into a spiral fluidity-testing mold preheated to 180 ℃ while it was superheated at 100 ℃. Spiral samples of ADC12 alloy were prepared for comparison in the same manner.
For each alloy, 5 spiral samples were cast and the measured lengths averaged. The fluidity of the alloy was characterized as a percentage of the flow length of the ADC12 alloy. The length of the spiral sample of the ADC12 alloy was 1172 mm, and the spiral pattern length of the alloy of this example was alloy 1: 1093mm, alloy 2: 1106mm, alloy 3: 1138mm the fluidity of the alloy of this example was 95% of that of the ADC12 alloy. Therefore, the alloy of the invention has good casting fluidity, namely, the alloy has good die-casting forming performance.
Example 3
The preparation and smelting steps of the die-casting aluminum alloy are the same as those in the embodiment 1, and the chemical components of the alloy obtained by analyzing the die-casting aluminum alloy by using a direct-reading spectrometer are as follows:
alloy 1: 8.5wt% of Si, 0.8wt% of Zn, 0.6wt% of Mg, 0.15wt% of Fe, 1.5wt% of Cu, 0.3wt% of Mn, 0.15wt% of Ti0.04 wt% of Sr, and the balance of Al and a small amount of unavoidable impurities.
Alloy 3: 10.5wt% of Si, 1.8wt% of Zn, 1.1wt% of Mg1, 0.35wt% of Fe, 2.6wt% of Cu, 0.6wt% of Mn, 0.04wt% of Sr0, 0.15wt% of Ti, and the balance of Al and a small amount of unavoidable impurities.
And controlling the temperature of the molten aluminum alloy at 660-680 ℃, and producing 2 batches of middle plate parts of a mobile phone of a certain model by using a 280-ton die casting machine. The wall thicknesses were 0.56mm and 0.75mm, respectively. Physical sampling was performed on the middle plate and the mechanical properties were measured as shown in table 2. By comparison, the mechanical properties of the middle plate with the wall thickness of 0.75mm are obviously lower than that of the middle plate with the wall thickness of 0.56 mm. The material of the invention is suitable for producing thin-wall castings.
TABLE 2 comparison of mechanical properties of alloy 1 and alloy 3 at different wall thicknesses
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A rapid heat treatment strengthening high-strength and high-toughness aluminum alloy material for die-casting thin-walled parts is characterized in that the aluminum alloy material comprises the following components in percentage by weight: 8 to 11 portions of Si, 0.4 to 1.2 portions of Mg, 1.5 to 3.0 portions of Cu, 0.5 to 2.0 portions of Zn, 0.05 to 0.5 portion of Fe, 0.3 to 0.6 portion of Mn, 0.2 portion of Ti, 0.1 portion of Sr, and the balance of Al and other impurities less than 1 percent.
2. The high-toughness aluminum alloy material as claimed in claim 1, wherein the aluminum alloy material comprises the following components in percentage by weight: 8.5 to 10.5 percent of Si, 0.6 to 1.1 percent of Mg, 1.5 to 2.6 percent of Cu, 0.8 to 1.8 percent of Zn, 0.15 to 0.35 percent of Fe, 0.3 to 0.6 percent of Mn, 0.2 percent of Ti, 0.1 percent of Sr, and the balance of Al and less than 1 percent of other impurities.
3. The high-toughness aluminum alloy material as claimed in claim 1, further comprising: also contains Pb less than or equal to 0.05 percent, other impurities less than or equal to 0.05 percent individually, and total less than or equal to 0.4 percent.
4. The preparation method of the high-strength high-toughness aluminum alloy material according to any one of claims 1 to 3, wherein the main steps comprise smelting, casting and rapid heat treatment.
5. The method of claim 4, wherein said melting step comprises:
(1) putting the pure aluminum or the electrolytic aluminum liquid which is weighed and proportioned into a smelting furnace, and heating to 700-800 ℃; then adding Mn, Si, Cu, Fe, Ti and other raw materials according to the proportion, and uniformly stirring;
(2) under the temperature of 700 plus 760 ℃, introducing inert gas by using a blowing device, uniformly spraying the aluminum alloy refining agent into the melt, and carrying out degassing and deslagging treatment for 30-40 minutes; then adding Zn, Mg, Sr and other elements, and uniformly stirring;
(3) skimming dross, standing for 20-60 minutes to obtain aluminum alloy melt for subsequent casting.
6. The method according to claim 5, wherein the silicon in the raw material is industrial silicon, instant silicon, or an aluminum-silicon intermediate alloy; manganese in the raw materials is an aluminum-manganese intermediate alloy or a manganese additive; the iron in the raw materials is aluminum-iron intermediate alloy or iron additive; the copper in the raw material is pure copper or aluminum-copper intermediate alloy or copper additive; the purity of magnesium in the raw material is more than 99.9 percent; the purity of zinc in the raw material is more than 99.99 percent; sr in the raw material is an aluminum-strontium intermediate alloy; the titanium in the raw material is an aluminum-titanium intermediate alloy or a titanium additive; the inert gas is high-purity nitrogen or high-purity argon.
7. The method of claim 4, wherein the step of casting is: and casting the melt prepared in the smelting step into an alloy ingot for remelting or casting at the casting temperature of 650-750 ℃.
8. The method according to claim 4, wherein the rapid heat treatment comprises: the effective reinforcement is realized in an extreme time, the temperature is 160-300 ℃, and the time is 10-30 s; preferably, the temperature is 260 ℃ and the time is 12 s.
9. The method according to claim 8, wherein the rapid heat treatment is performed in an original step of a manufacturing process of the component itself without adding a new step.
10. The high-toughness aluminum alloy material as set forth in any one of claims 1 to 3 and the high-toughness aluminum alloy material as set forth in any one of claims 4 to 9 are applied to parts with complex structures and thin-wall structures, in particular to parts of consumer electronics parts such as smart phones and the like and parts of communication cases, radiators and the like.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1607261A (en) * | 2003-10-13 | 2005-04-20 | 合金材料实验室 | Die-casting aluminium alloy |
| CN1709612A (en) * | 2004-06-17 | 2005-12-21 | 创宇科技工业股份有限公司 | Superthin-wall aluminium-alloy high-speed pressure casting method |
| CN103060632A (en) * | 2012-12-18 | 2013-04-24 | 莫纳什大学 | Aluminum alloy for automotive body and heat treatment method |
| CN103192051A (en) * | 2013-04-03 | 2013-07-10 | 福建省瑞奥麦特轻金属有限责任公司 | Manufacturing method of ultra thin-walled light metal alloy housing or frame |
| CN108754250A (en) * | 2018-06-03 | 2018-11-06 | 深圳市鑫申新材料科技有限公司 | A kind of high strength die-casting aluminum alloy and its manufacturing method |
| CN109306413A (en) * | 2018-11-07 | 2019-02-05 | 深圳市博锐专利新技术服务有限公司 | A kind of die-cast aluminum alloy material and its preparation method and application of high intensity high thermal conductivity |
| CN110551924A (en) * | 2018-05-30 | 2019-12-10 | 比亚迪股份有限公司 | Aluminum alloy and preparation method and application thereof |
-
2020
- 2020-02-29 CN CN202010131751.2A patent/CN111155000A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1607261A (en) * | 2003-10-13 | 2005-04-20 | 合金材料实验室 | Die-casting aluminium alloy |
| CN1709612A (en) * | 2004-06-17 | 2005-12-21 | 创宇科技工业股份有限公司 | Superthin-wall aluminium-alloy high-speed pressure casting method |
| CN103060632A (en) * | 2012-12-18 | 2013-04-24 | 莫纳什大学 | Aluminum alloy for automotive body and heat treatment method |
| CN103192051A (en) * | 2013-04-03 | 2013-07-10 | 福建省瑞奥麦特轻金属有限责任公司 | Manufacturing method of ultra thin-walled light metal alloy housing or frame |
| CN110551924A (en) * | 2018-05-30 | 2019-12-10 | 比亚迪股份有限公司 | Aluminum alloy and preparation method and application thereof |
| CN108754250A (en) * | 2018-06-03 | 2018-11-06 | 深圳市鑫申新材料科技有限公司 | A kind of high strength die-casting aluminum alloy and its manufacturing method |
| CN109306413A (en) * | 2018-11-07 | 2019-02-05 | 深圳市博锐专利新技术服务有限公司 | A kind of die-cast aluminum alloy material and its preparation method and application of high intensity high thermal conductivity |
Non-Patent Citations (1)
| Title |
|---|
| 王世洪: "《铝及铝合金热处理》", 28 February 1986 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111647785A (en) * | 2020-06-17 | 2020-09-11 | 帅翼驰新材料集团有限公司 | High-strength die-casting aluminum alloy and preparation method thereof |
| CN112301259A (en) * | 2020-10-10 | 2021-02-02 | 广东省科学院材料与加工研究所 | High-strength die-casting aluminum alloy, and preparation method and application thereof |
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| CN114908273A (en) * | 2021-02-09 | 2022-08-16 | 苏州慧金新材料科技有限公司 | Thermal-finishing strengthening die-casting aluminum alloy material for middle plate of 5G mobile phone and preparation method of thermal-finishing strengthening die-casting aluminum alloy material |
| CN115976356A (en) * | 2023-01-12 | 2023-04-18 | 高安市璐克斯机械有限公司 | As-cast high-strength high-toughness die-casting aluminium-silicon alloy and its preparation method |
| CN115852214A (en) * | 2023-02-27 | 2023-03-28 | 南通鸿劲金属铝业有限公司 | Heat-treatable reinforced high-strength and high-toughness aluminum alloy and preparation method thereof |
| CN115852214B (en) * | 2023-02-27 | 2023-06-27 | 南通鸿劲金属铝业有限公司 | High-strength and high-toughness aluminum alloy capable of being strengthened by heat treatment and preparation method thereof |
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| CN117646138A (en) * | 2024-01-30 | 2024-03-05 | 鸿劲新材料研究(南通)有限公司 | Explosion-proof aluminum alloy material and preparation method thereof |
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