CN117845107A - Heat-treatment-free die-casting aluminum alloy and preparation method and application thereof - Google Patents
Heat-treatment-free die-casting aluminum alloy and preparation method and application thereof Download PDFInfo
- Publication number
- CN117845107A CN117845107A CN202410257029.1A CN202410257029A CN117845107A CN 117845107 A CN117845107 A CN 117845107A CN 202410257029 A CN202410257029 A CN 202410257029A CN 117845107 A CN117845107 A CN 117845107A
- Authority
- CN
- China
- Prior art keywords
- die
- aluminum alloy
- alloy
- less
- equal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 112
- 238000004512 die casting Methods 0.000 title claims abstract description 88
- 238000002360 preparation method Methods 0.000 title claims description 11
- 239000000956 alloy Substances 0.000 claims abstract description 54
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 51
- 239000012535 impurity Substances 0.000 claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 35
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 28
- 239000011777 magnesium Substances 0.000 claims description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 21
- 238000005275 alloying Methods 0.000 claims description 19
- 238000007670 refining Methods 0.000 claims description 19
- 239000011572 manganese Substances 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 11
- 238000003723 Smelting Methods 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 11
- -1 aluminum manganese Chemical compound 0.000 claims description 10
- 229910052749 magnesium Inorganic materials 0.000 claims description 10
- 150000002910 rare earth metals Chemical class 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 239000010936 titanium Substances 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 238000007872 degassing Methods 0.000 claims description 6
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 5
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- 229910000914 Mn alloy Inorganic materials 0.000 claims description 5
- 229910000676 Si alloy Inorganic materials 0.000 claims description 5
- 229910001278 Sr alloy Inorganic materials 0.000 claims description 5
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 5
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 claims description 5
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 5
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 claims description 5
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 claims description 5
- YNDGDLJDSBUSEI-UHFFFAOYSA-N aluminum strontium Chemical compound [Al].[Sr] YNDGDLJDSBUSEI-UHFFFAOYSA-N 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229910001093 Zr alloy Inorganic materials 0.000 claims description 4
- ZGUQGPFMMTZGBQ-UHFFFAOYSA-N [Al].[Al].[Zr] Chemical compound [Al].[Al].[Zr] ZGUQGPFMMTZGBQ-UHFFFAOYSA-N 0.000 claims description 4
- 229910001245 Sb alloy Inorganic materials 0.000 claims description 3
- 239000002140 antimony alloy Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 22
- 239000000126 substance Substances 0.000 description 19
- 230000008569 process Effects 0.000 description 15
- 230000005496 eutectics Effects 0.000 description 14
- 239000000155 melt Substances 0.000 description 11
- 238000005266 casting Methods 0.000 description 9
- 239000002131 composite material Substances 0.000 description 9
- 239000013078 crystal Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 230000006911 nucleation Effects 0.000 description 7
- 238000010899 nucleation Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 229910052787 antimony Inorganic materials 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- 229910017115 AlSb Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 230000009931 harmful effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000008707 rearrangement Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- IHCCLXNEEPMSIO-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)CC(=O)N1CC2=C(CC1)NN=N2 IHCCLXNEEPMSIO-UHFFFAOYSA-N 0.000 description 1
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005247 gettering Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Extrusion Of Metal (AREA)
Abstract
The invention relates to a heat treatment-free die-casting aluminum alloy, which comprises the following components by taking the total weight of the die-casting aluminum alloy as a reference: 6.3 to 9.0 wt% of Si,0.15 to 0.5 wt% of Mg,0.15 to 0.6 wt% of Cu,0.10 to 0.25 wt% of Fe,0.5 to 0.75 wt% of Mn,0.05 to 0.25 wt% of Ti,0.02 to 0.06 wt% of Sr, less than or equal to 0.15 wt% of Zr, less than or equal to 0.30 wt% of Sb, less than or equal to 0.05 wt% of other impurity elements and the balance of Al. The heat-treatment-free die-casting aluminum alloy provided by the invention has higher alloy strength and good ductility, and is suitable for manufacturing thin-wall parts of automobiles.
Description
Technical Field
The invention relates to the technical field of aluminum alloy, in particular to a self-toughening heat-treatment-free die-casting aluminum alloy and a preparation method thereof.
Background
Achieving the carbon peak and carbon neutralization goals puts a great demand on the low-carbon zero-carbon negative carbon technology. The automobile is an important means for promoting energy conservation and emission reduction and relieving mileage anxiety of new energy automobiles. The path for realizing the light weight of the automobile mainly comprises three directions of materials, processes and structures. Wherein, the light weight of the material is the basis of light weight of the process and the structure. Based on the selection of the determined lightweight materials, the materials can be further designed in a weight-reducing way through the process and the structure.
The aluminum alloy has outstanding comprehensive advantages in the aspects of performance, density, cost, processability and the like, and is an ideal material for realizing the weight reduction of automobiles. With the increasing severity of collision regulations and rising new forces for vehicle construction, the requirements of automobiles on the strength, the plasticity and other aspects of aluminum alloy materials are higher and higher, and the traditional aluminum alloy materials cannot meet the requirements of automobiles on high-performance thin-wall parts.
Disclosure of Invention
The invention aims to provide a self-toughening heat-treatment-free die-casting aluminum alloy, which meets the requirements of an automobile on the strength and the plasticity of an aluminum alloy material and further meets the requirements of the automobile on high-performance structural thin-wall parts.
In order to achieve the above object, a first aspect of the present invention provides a heat treatment-free die-cast aluminum alloy, comprising, based on the total weight of the die-cast aluminum alloy: 6.3 to 9.0 wt% of Si,0.15 to 0.5 wt% of Mg,0.15 to 0.6 wt% of Cu,0.10 to 0.25 wt% of Fe,0.5 to 0.75 wt% of Mn,0.05 to 0.25 wt% of Ti,0.02 to 0.06 wt% of Sr, less than or equal to 0.15 wt% of Zr, less than or equal to 0.30 wt% of Sb, less than or equal to 0.05 wt% of other impurity elements and the balance of Al.
The inventors of the present invention unexpectedly found that adding Sr element, sb element and Zr element in the preparation process of aluminum alloy, precipitating Sb-rich atomic clusters through Sr-Sb-Zr composite deterioration, the Sb-rich atomic clusters on one hand play a remarkable role in pinning dislocation during the service process of die casting, and on the other hand, atoms in the dough clusters consume energy through atomic rearrangement when interacting with dislocation, thereby relieving the formation of local stress concentration, realizing the toughening of alloy, and completing the synchronous promotion of ultimate tensile strength, yield strength and elongation rate of alloy. The heat-treatment-free die-casting aluminum alloy provided by the invention achieves excellent light weight while obtaining ultrahigh strength performance, and simultaneously has good heat cracking resistance tendency and good corrosion resistance.
Optionally, in the die-casting aluminum alloy, the mass ratio of Mn to Fe is greater than or equal to 3.0, and the mass ratio of Mg to Sb is greater than or equal to 1.2.
Optionally, the die-casting aluminum alloy further comprises less than or equal to 0.10 wt% of rare earth elements, based on the total weight of the die-casting aluminum alloy; wherein the rare earth element is La and/or Ce.
Optionally, the die-casting aluminum alloy comprises the following components based on the total weight of the die-casting aluminum alloy: 6.3 to 8.5 wt% of Si,0.15 to 0.4 wt% of Mg,0.2 to 0.6 wt% of Cu,0.10 to 0.25 wt% of Fe,0.5 to 0.75 wt% of Mn,0.05 to 0.25 wt% of Ti,0.02 to 0.06 wt% of Sr, less than or equal to 0.15 wt% of Zr, less than or equal to 0.30 wt% of Sb, less than or equal to 0.10 wt% of rare earth elements, less than or equal to 0.05 wt% of other impurity elements and the balance of Al.
Optionally, the die-casting aluminum alloy comprises the following components based on the total weight of the die-casting aluminum alloy: 6.3 to 8.5 wt% of Si,0.15 to 0.4 wt% of Mg,0.2 to 0.6 wt% of Cu,0.10 to 0.25 wt% of Fe,0.5 to 0.75 wt% of Mn,0.05 to 0.25 wt% of Ti,0.02 to 0.05 wt% of Sr, less than or equal to 0.10 wt% of Zr, less than or equal to 0.25 wt% of Sb, less than or equal to 0.10 wt% of rare earth elements, less than or equal to 0.05 wt% of other impurity elements and the balance of Al.
Optionally, the die-casting aluminum alloy has the ultimate tensile strength of 287-312 MPa, the yield strength of 130-153 MPa and the elongation at break of 11.0-14.5%.
The second aspect of the present invention provides a method for preparing a heat-treatment-free die-casting aluminum alloy, comprising: adding a first material into a smelting furnace, and performing first alloying treatment and first refining slag skimming to obtain a first melt;
adding a second material into the first melt to perform second alloying treatment and second refining slag skimming to obtain a second melt;
adding a third material into the second melt to perform third alloying treatment and third refining slag skimming to obtain a third melt;
introducing nitrogen into the third melt to carry out degassing, standing and smelting to obtain a fourth melt;
the fourth melt is cooled to the temperature of high-pressure die casting and is subjected to high-pressure die casting to obtain die casting aluminum alloy;
wherein the first material comprises aluminum ingots, aluminum silicon alloy, aluminum iron alloy, aluminum manganese alloy and aluminum copper alloy; the second material comprises aluminum-zirconium alloy, aluminum-antimony alloy and aluminum-titanium alloy; the third material comprises magnesium ingots and aluminum-strontium alloy.
According to the preparation method of the heat-treatment-free die-casting aluminum alloy, the regenerated aluminum ingot is used as a raw material, various intermediate alloys are added to adjust alloy components and content, the morphology of eutectic (Si) is changed by Sr aiming at eutectic (Si) particles, and the size of the eutectic (Si) is reduced by Sb; for primary crystals (Al), sb and Zr form AlSb and Al, respectively 3 Zr heterogeneous nucleation sites, adding primary crystal (Al) nucleation sites, and refining grains. And combining Sr-Sb-Zr composite modification, and refining primary crystals and eutectic structures to obtain the heat-treatment-free die-casting aluminum alloy with excellent strength and high elongation.
Optionally, the second material further comprises a rare earth alloy, and the rare earth alloy is lanthanum-cerium rare earth alloy.
Optionally, the temperature of the first alloying treatment is 740-760 ℃; the temperature of the second alloying treatment is 740-760 ℃; the temperature of the third alloying treatment is 720-730 ℃; the smelting temperature is 710-720 ℃; the conditions of the high-pressure die casting include: the temperature is 670-710 ℃, the pressure is 25-70 MPa, and the injection speed is 4.0-7.0 m/s.
The third aspect of the invention provides a thin-wall part of an automobile body structure, which comprises a die-casting aluminum alloy, wherein the die-casting aluminum alloy is the heat-treatment-free die-casting aluminum alloy or the heat-treatment-free die-casting aluminum alloy prepared by the preparation method.
Through the technical scheme, the heat-treatment-free die-casting aluminum alloy provided by the invention has higher alloy strength and good ductility, is suitable for manufacturing thin-wall parts of automobiles, and meets the mechanical property requirements.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 shows a process flow diagram of an exemplary heat treatment free die cast aluminum alloy of the present invention.
FIG. 2 shows a microstructure observation image measured using an optical microscope after the aluminum alloy casting prepared in example 5 of the present invention is left to stand under natural conditions for 72 hours.
Fig. 3 shows an Sb element composition distribution image measured using a field emission electron probe microanalyzer after the aluminum alloy cast prepared in example 5 of the present invention was left to stand for 72 hours under natural conditions.
FIG. 4 shows Mg measured using a field emission electron probe microanalyzer after the aluminum alloy casting prepared in comparative example 4 of the present invention was left to stand under natural conditions for 72 hours 3 Sb 2 Second phase morphology.
FIG. 5 shows the precipitation mechanism of natural aging Sb-rich clusters after Sr-Sb-Zr composite action and the corresponding mechanical property change trend in the invention.
Detailed Description
The following describes specific embodiments of the present invention in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In order to achieve the above object, a first aspect of the present invention provides a heat treatment-free die-cast aluminum alloy, comprising, based on the total weight of the die-cast aluminum alloy: 6.3 to 9.0 wt% of Si,0.15 to 0.5 wt% of Mg,0.15 to 0.6 wt% of Cu,0.10 to 0.25 wt% of Fe,0.5 to 0.75 wt% of Mn,0.05 to 0.25 wt% of Ti,0.02 to 0.06 wt% of Sr, less than or equal to 0.15 wt% of Zr, less than or equal to 0.30 wt% of Sb, less than or equal to 0.05 wt% of other impurity elements and the balance of Al.
The Si is taken as a main component, so that the casting fluidity of the melt can be obviously improved, the filling of the melt in the die casting process is ensured, the solidification shrinkage is greatly reduced, and the shrinkage cavity problem is reduced. In addition, an increase in Si content also increases the alloy strength. In the invention, mg and Cu are taken as main strengthening components, and Mg is formed in the alloy 2 Si、Al 2 Cu and Q-Al 5 Cu 2 Mg 8 Si 6 Strengthening phase, and increasing ultimate tensile strength and yield strength of alloy. The inventors of the present invention found that appropriate amounts of Cu and Mg can ensure the ductility of castings. The unavoidable impurity Fe in the aluminum raw material is separated out by the harmful substances of the slender needle-shaped AlFeSi, but the Fe element can reduce the tendency of the cast mucosa; furthermore, the invention can dissolve impurity Fe through adding Mn element to form blocky Al (Fe, mn) Si compound so as to reduce the harmful influence of Fe.
In the invention, ti acts as a nucleation point in the die casting process, so that the nucleation number of primary (Al) grains is increased, the grain refinement is realized, sr changes lamellar Si into fine grains, and the elongation of the die casting alloy is improved. In the invention, zr refiner and Sb modifier are added to refine and deteriorate alloy tissues, and when Zr and Sb act on primary (Al) grains, the Zr and Sb act as heterogeneous nuclear particles to refine the grains. When Sb acts on eutectic (Si), the eutectic (Si) is refined. In addition, the addition of Sb overcomes the problems that Sr is easy to burn and cause melt to suck, and can fully exert the metamorphic effect for a long time to achieve the long-term metamorphic effect. On the other hand, as shown in fig. 5, after die casting is completed, the Sr-Sb-Zr is compositely deteriorated with the prolongation of natural aging, and Sb-rich clusters are gradually precipitated in the α -Al matrix. The electron probe X-ray microscopic analyzer is used for measuring that the clusters rich in Sb are uniformly distributed in the alloy, and the clusters relieve the formation of stress concentration in a mode of pinning dislocation and absorbing energy, so that the self-strengthening and toughening of the alloy are realized, and the ultimate tensile strength, the yield strength and the elongation of the alloy are synchronously improved. Wherein, the atomic clusters referred to in the present invention refer to aggregates composed of several to several hundred or even thousands of atoms.
According to the present invention, in the die-cast aluminum alloy, the mass ratio of Mn to Fe may be 3.0 or more, and the mass ratio of mg to Sb may be 1.2 or more. By controlling the mass ratio of Mn and Fe to the mass ratio of Mg and Sb, the formation of a deleterious phase can be further circumvented.
In an exemplary embodiment of the present invention, the die cast aluminum alloy further includes less than or equal to 0.10 wt% of rare earth elements, based on the total weight of the die cast aluminum alloy; wherein the rare earth element is La and/or Ce. Rare earth Ce and La in the invention have the function of purifying the furnace body on one hand, and reduce the air suction phenomenon; on the other hand, the alloy is enriched in the grain boundary position in the die casting process, so that the harmful effect of impurity elements is eliminated; in addition, the Ce element is interacted with other alloy elements to form a compound, the alloy structure is changed, for example, the Ce element is added into the Al-Si alloy to form softer AlCESI 2 And phase, the elongation of the alloy is improved.
According to the invention, the die-casting aluminum alloy can comprise the following components by taking the total weight of the die-casting aluminum alloy as a reference: 6.3 to 8.5 wt% of Si,0.15 to 0.4 wt% of Mg,0.2 to 0.6 wt% of Cu,0.10 to 0.25 wt% of Fe,0.5 to 0.75 wt% of Mn,0.05 to 0.25 wt% of Ti,0.02 to 0.06 wt% of Sr, less than or equal to 0.15 wt% of Zr, less than or equal to 0.30 wt% of Sb, less than or equal to 0.10 wt% of rare earth elements, less than or equal to 0.01 wt% of other impurity elements and the balance of Al. In the embodiment, the element content of Si, cu and Mg is further optimized, so that the alloy can be ensured to have better strength and elongation matching performance.
According to the invention, the die-casting aluminum alloy can comprise the following components by taking the total weight of the die-casting aluminum alloy as a reference: 6.3 to 8.5 wt% of Si,0.15 to 0.40 wt% of Mg,0.2 to 0.6 wt% of Cu,0.10 to 0.25 wt% of Fe,0.5 to 0.75 wt% of Mn,0.05 to 0.25 wt% of Ti,0.02 to 0.05 wt% of Sr, less than or equal to 0.10 wt% of Zr, less than or equal to 0.25 wt% of Sb, less than or equal to 0.10 wt% of rare earth elements, less than or equal to 0.01 wt% of other impurity elements and the balance of Al. In this embodiment, the sr—zr—sb composite effect can be further exerted by further optimizing the element content of Sr, zr, sb.
According to the die-casting aluminum alloy, the ultimate tensile strength can be 287-312 MPa, the yield strength can be 130-153 MPa, and the elongation at break can be 11.0-14.5%. The die-casting aluminum alloy disclosed by the invention has higher alloy strength and good ductility, is suitable for manufacturing thin-wall parts of automobiles, and meets the mechanical property requirements.
A second aspect of the present invention provides a method for preparing a heat-treatment-free die-casting aluminum alloy, as shown in fig. 1, comprising: adding a first material into a smelting furnace, and performing first alloying treatment and first refining slag skimming to obtain a first melt;
adding a second material into the first melt to perform second alloying treatment and second refining slag skimming to obtain a second melt;
adding a third material into the second melt to perform third alloying treatment and third refining slag skimming to obtain a third melt;
introducing nitrogen into the third melt to carry out degassing, standing and smelting to obtain a fourth melt;
the fourth melt is cooled to the temperature of high-pressure die casting and is subjected to high-pressure die casting to obtain die casting aluminum alloy;
wherein the first material comprises aluminum ingots, aluminum silicon alloy, aluminum iron alloy, aluminum manganese alloy and aluminum copper alloy; the second material comprises aluminum-zirconium alloy, aluminum-antimony alloy and aluminum-titanium alloy; the third material comprises magnesium ingots and aluminum-strontium alloy.
The preparation method of the heat-treatment-free die-casting aluminum alloy provided by the invention takes a regenerated aluminum ingot as a raw material, and adjusts alloy components and contents by adding various intermediate alloysIn terms of the amount, for eutectic (Si) particles, sr changes the shape of the eutectic (Si), and Sb reduces the size of the eutectic (Si); for primary crystals (Al), sb and Zr form AlSb and Al, respectively 3 Zr heterogeneous nucleation sites, adding primary crystal (Al) nucleation sites, and refining grains. And combining Sr-Sb-Zr composite modification, and refining primary crystals and eutectic structures to obtain the heat-treatment-free die-casting aluminum alloy with excellent strength and high elongation.
In the first exemplary embodiment of the invention, rare earth alloy is not added in the preparation process, and the prepared rare earth-free heat treatment-free die-casting aluminum alloy can greatly save the production cost while meeting the requirements of industrial production of automobile thin-wall structural parts.
In a second exemplary embodiment of the present invention, the second material may further include a rare earth alloy, and the rare earth element may be added to further purify the melt and reduce the gettering phenomenon. The rare earth alloy may be lanthanum cerium rare earth alloy.
The die-casting aluminum alloy prepared by the method can separate out Sb-rich clusters after natural aging at room temperature, the Sb-rich clusters have obvious effect of pinning dislocation on one hand in the service process of the die-casting, and energy is consumed by atomic rearrangement when atoms in the other dough cluster interact with dislocation, so that the formation of local stress concentration is relieved, and the toughening of the alloy is realized. It can be seen from fig. 5 that the ultimate tensile strength, yield strength and elongation of the alloy are synchronously improved with the extension of the parking time, and the best effect is achieved after 72 hours.
According to the invention, the temperature of the first alloying treatment can be 740-760 ℃; the temperature of the second alloying treatment can be 740-760 ℃; the temperature of the third alloying treatment can be 720-730 ℃; the smelting temperature can be 710-720 ℃; the conditions of the high pressure die casting may include: the temperature is 670-710 ℃, the pressure is 25-70 MPa, and the injection speed is 4.0-7.0 m/s.
The refining and slagging-off process comprises refining treatment and slagging-off treatment. Wherein the refining process may include: introducing inert gas atmosphere or nitrogen with refining agent powder into the second melt by adopting rotary blowing equipment; illustratively, the inert gas is argon; the pressure of the inert gas atmosphere or nitrogen gas can be 0.4-0.6 MPa, the flow can be 20-30L/min, the degassing rotation speed can be 500-600 r/min, the degassing time can be 10-30 min, and the temperature can be 710-740 ℃. The skimming process may be a method commonly used in the art, for example, the specific operation of the skimming process may be manual skimming using an iron skimming tool.
The third aspect of the invention provides a thin-wall part of an automobile body structure, which comprises a die-casting aluminum alloy, wherein the die-casting aluminum alloy is the heat-treatment-free die-casting aluminum alloy or the heat-treatment-free die-casting aluminum alloy prepared by the preparation method.
The invention is illustrated in further detail by the following examples. The starting materials used in the examples are all available commercially.
The preparation method of the aluminum alloy in the embodiment specifically comprises the following steps:
1) Preparing materials: weighing alloy raw materials according to designed alloy components, and drying the raw materials.
2) Smelting: and heating the smelting furnace to 750 ℃ to melt the first material, and performing primary refining and slag skimming. Adding a second material into the melt, fully stirring for alloying, and carrying out secondary refining and slag skimming. And adjusting the temperature of the melt to 720-730 ℃, adding a third material, and fully stirring to accelerate the melting and diffusion of the alloy elements. And adjusting the temperature of the melt to 710-720 ℃, introducing nitrogen into the melt to degas for 3-5min, and standing for 10-15min after the degassing is finished. And adjusting the temperature of the melt to 670-710 ℃.
3) And (3) die casting: preheating a die of a die casting machine to 180-300 ℃, cleaning the surface of a die cavity of the die, and spraying demolding coating; transferring the melt with qualified component detection to a die casting machine for high-pressure die casting. The casting pressure was 30MPa and the shot velocity was 6.5m/s. The mold used was a flat plate mold having a length of 230 mm and a width of 200 mm.
The raw materials used in the embodiment are selected from regenerated aluminum ingots, aluminum-silicon alloys, magnesium ingots, aluminum-copper alloys, aluminum-iron alloys, aluminum-manganese alloys, aluminum-titanium alloys, aluminum-strontium alloys and lanthanum-cerium-rare earth alloys. The first material is selected from regenerated aluminum ingots, aluminum-silicon alloys, aluminum-iron alloys, aluminum-manganese alloys and aluminum-copper alloys. The second material is selected from lanthanum-cerium-rare earth alloy, aluminum-titanium alloy and aluminum-zirconium alloy. The third material is selected from magnesium ingots and aluminum-strontium alloys.
Example 1
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:8.00%, mg:0.25%, cu:0.25%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.15%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Example 2
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:7.20%, mg:0.30%, cu:0.45%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.15%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Example 3
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:8.00%, mg:0.30%, cu:0.40%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.10%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Example 4
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:8.00%, mg:0.30%, cu:0.40%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.01%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Example 5
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:8.00%, mg:0.35%, cu:0.40%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.15%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Example 6
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:8.60%, mg:0.35%, cu:0.35%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.24%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Example 7
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:8.60%, mg:0.35%, cu:0.35%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.03%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Example 8
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:8.00%, mg:0.35%, cu:0.40%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, zr:0.02%, sb:0.15%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Example 9
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:8.00%, mg:0.35%, cu:0.40%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, zr:0.08%, sb:0.15%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Example 10
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:8.00%, mg:0.40%, cu:0.45%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.15%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Example 11
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:8.00%, mg:0.30%, cu:0.40%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, zr:0.04%, sb:0.10%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Comparative example 1
The heat-treatment-free die-casting aluminum alloy of the comparative example comprises the following chemical components in percentage by mass: si:5.50%, mg:0.35%, cu:0.40%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.15%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Comparative example 2
The heat-treatment-free die-casting aluminum alloy of the comparative example comprises the following chemical components in percentage by mass: si:8.00%, mg:0.60%, cu:0.40%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.15%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Comparative example 3
The heat-treatment-free die-casting aluminum alloy of the comparative example comprises the following chemical components in percentage by mass: si:8.00%, mg:0.35%, cu:0.80%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.15%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Comparative example 4
The heat-treatment-free die-casting aluminum alloy of the comparative example comprises the following chemical components in percentage by mass: si:8.00%, mg:0.35%, cu:0.40%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.33%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Comparative example 5
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:9.30%, mg:0.35%, cu:0.40%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.04%, sb:0.15%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Comparative example 6
The self-toughening heat-treatment-free die-casting aluminum alloy comprises the following chemical components in percentage by mass: si:8.00%, mg:0.35%, cu:0.40%, fe:0.17%, mn:0.63%, ti:0.12%, sr:0.025%, ce:0.04%, la:0.02%, zr:0.18%, sb:0.15%. Unspecified other impurity elements: each kind is less than or equal to 0.01 percent, the total amount is less than or equal to 0.10 percent, and the rest is Al.
Table 1 records the chemical compositions of the aluminum alloys prepared in examples 1-11 and comparative examples 1-6.
TABLE 1
Test example 1
After the aluminum alloys prepared in examples 1 to 11 and comparative examples 1 to 6 were left to stand under natural conditions for 72 hours, samples were taken on castings, and performance tests were conducted according to the requirements of GB/T228.1, and the test results are shown in Table 2. Wherein, the comprehensive performance factor=uts+ys×log 10 (EL); UTS: tensile strength; YS: yield strength; EL: elongation percentage.
TABLE 2
By combining the above examples and comparative examples, the application provides a self-toughening heat-treatment-free die-casting aluminum alloy, the comprehensive performance of the prepared heat-treatment-free aluminum alloy can reach 310 MPa, the yield strength can reach 148 MPa, the elongation can reach 13.2%, the problem of mutual restriction of material strength and plasticity is overcome, and the synchronous promotion of the heat-treatment-free aluminum alloy strength and plasticity is realized.
As can be seen from the above examples and comparative examples, the Sr-Sb-Zr composite deterioration not only can fully exert the Sr effect on the eutectic (Si), but also can deteriorate the plate-like (Si) into a short rod-like or even granular shape; the addition of Sb can further refine eutectic (Si) particles, overcome the phenomenon that Sr is easy to be absorbed by air after being modified, maintain the cleanliness of the melt and reduce casting pinholes and inclusions. On the other hand, zr-Sb forms A in the die casting process 3 Zr and AlSb are used as heterogeneous nucleation points of primary crystals (Al) in the alloy, so that grain refinement is promoted, and the effect of grain refinement is achieved. Therefore, the Sr-Sb-Zr composite modification not only can realize primary crystal (Al) size refinement and eutectic (Si) morphology and size modification, but also can greatly reduce alloy casting defects.
From the combination of examples and comparative example 1, it is understood that when the Si content is lower than the composition range, the alloy has a lower yield strength and tensile strength although it has a higher elongation; from the combination of examples and comparative examples 2 to 3, it is understood that when the Mg or Cu content is higher than the composition range, the alloy has a higher yield strength and tensile strength, but the alloy elongation is lower; when the mass ratio of Mn/Fe is less than 3.0 or the mass ratio of Mg/Sb is less than 1.2, the alloy has both lower strength and elongation. The aluminum alloy prepared in comparative example 4 was measured using a field emission electron probe microanalyzer, and the measurement results are shown in fig. 4. It can be seen that Sb and Mg are combined to form coarse bulk Mg in the aluminum alloy prepared in comparative example 4 3 Sb 2 Second phase, and Mg 3 Sb 2 Shrinkage cavities exist between the phases and the matrix. Coarse Mg in the service process of the material 3 Sb 2 The phases and surrounding shrinkage cavities act as a crack source, disabling the material.
As is clear from the combination of example 5, comparative example 5 and comparative example 6, when the Si content in the alloy is 9.3wt% (comparative example 5) and the Zr content is 0.18wt%, excessive eutectic crystals are generated in the alloy structure, respectivelySilicon structure and Al enriched along grain boundaries 3 Zr particles, and the elongation of the alloy is obviously reduced.
In addition, as can be seen from examples 3 and 11, the addition of rare earth RE can deeply purify the melt, further improve the ultimate tensile strength and elongation of the alloy, and the alloy has higher comprehensive mechanical properties. It is worth noting that the die-casting aluminum alloy without adding rare earth and heat treatment also has higher comprehensive mechanical properties, and the alloy properties also meet the requirements of the automobile structural parts on the mechanical properties.
Test example 2
The aluminum alloy prepared in example 5 was left to stand under natural conditions for 72 hours and 24 hours, respectively, and samples were taken on castings, and performance tests were performed according to the requirements of GB/T228.1, and the test results are shown in Table 3. Wherein, the comprehensive performance factor=uts+ys×log 10 (EL); UTS: tensile strength; YS: yield strength; EL: elongation percentage. An optical microscope (model: leica-DM 4500P) was used to observe a microstructure observation image of the aluminum alloy after 72 hours of placement, as shown in FIG. 2; the Sb element composition distribution of the aluminum alloy after 72 hours of standing was measured using a field emission electron probe microanalyzer (model: JXA-8530), as shown in FIG. 3.
TABLE 3 Table 3
Compared with the aluminum alloy placed for 24 hours, the die-casting aluminum alloy with the comprehensive comparison of the embodiment 5-1 and the embodiment 5-2 has the advantages that the ultimate tensile strength, the yield strength and the elongation are further improved after being placed for 72 hours, so that the Sr-Sb-Zr composite deterioration in the aluminum alloy can fully exert the deterioration effect for a long time, and the long-acting deterioration effect is achieved. As can be seen from fig. 2 and 3, the Sr-Sb-Zr composite modified die-casting alloy forms Sb-rich clusters after naturally standing for 72 hours, and the Sb-rich clusters increase the blocking effect on dislocation movement, thereby realizing self-toughening of the die-casting aluminum alloy and achieving synergistic improvement of strength and elongation.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A heat treatment-free die-casting aluminum alloy, characterized in that, based on the total weight of the die-casting aluminum alloy, the die-casting aluminum alloy comprises:
6.3 to 9.0 wt% of Si,0.15 to 0.5 wt% of Mg,0.15 to 0.6 wt% of Cu,0.10 to 0.25 wt% of Fe,0.5 to 0.75 wt% of Mn,0.05 to 0.25 wt% of Ti,0.02 to 0.06 wt% of Sr, less than or equal to 0.15 wt% of Zr, less than or equal to 0.30 wt% of Sb, less than or equal to 0.05 wt% of other impurity elements and the balance of Al.
2. The heat treatment-free die-cast aluminum alloy as claimed in claim 1, wherein the die-cast aluminum alloy has a mass ratio of Mn to Fe of 3.0 or more and a mass ratio of mg to Sb of 1.2 or more.
3. The heat treatment-free die-cast aluminum alloy as claimed in claim 1, further comprising 0.10 wt% or less of rare earth elements based on the total weight of the die-cast aluminum alloy; wherein the rare earth element is La and/or Ce.
4. A heat treatment-free die cast aluminum alloy as claimed in claim 3, wherein said die cast aluminum alloy comprises, based on the total weight of said die cast aluminum alloy:
6.3 to 8.5 wt% of Si,0.15 to 0.4 wt% of Mg,0.2 to 0.6 wt% of Cu,0.10 to 0.25 wt% of Fe,0.5 to 0.75 wt% of Mn,0.05 to 0.25 wt% of Ti,0.02 to 0.06 wt% of Sr, less than or equal to 0.15 wt% of Zr, less than or equal to 0.30 wt% of Sb, less than or equal to 0.10 wt% of rare earth elements, less than or equal to 0.05 wt% of other impurity elements and the balance of Al.
5. The heat treatment-free die cast aluminum alloy as claimed in claim 4, wherein the die cast aluminum alloy comprises, based on the total weight of the die cast aluminum alloy:
6.3 to 8.5 wt% of Si,0.15 to 0.4 wt% of Mg,0.2 to 0.6 wt% of Cu,0.10 to 0.25 wt% of Fe,0.5 to 0.75 wt% of Mn,0.05 to 0.25 wt% of Ti,0.02 to 0.06 wt% of Sr, less than or equal to 0.10 wt% of Zr, less than or equal to 0.25 wt% of Sb, less than or equal to 0.10 wt% of rare earth elements, less than or equal to 0.05 wt% of other impurity elements and the balance of Al.
6. The heat treatment-free die-cast aluminum alloy according to any one of claims 1 to 5, wherein the die-cast aluminum alloy has an ultimate tensile strength of 287 to 312mpa, a yield strength of 130 to 153mpa, and an elongation at break of 11.0 to 14.5%.
7. A method for producing a heat-treatment-free die-cast aluminum alloy as defined in any one of claims 1 to 6, comprising:
adding a first material into a smelting furnace, and performing first alloying treatment and first refining slag skimming to obtain a first melt;
adding a second material into the first melt to perform second alloying treatment and second refining slag skimming to obtain a second melt;
adding a third material into the second melt to perform third alloying treatment and third refining slag skimming to obtain a third melt;
introducing nitrogen into the third melt to carry out degassing, standing and smelting to obtain a fourth melt;
the fourth melt is cooled to the temperature of high-pressure die casting and is subjected to high-pressure die casting to obtain die casting aluminum alloy;
wherein the first material comprises aluminum ingots, aluminum silicon alloy, aluminum iron alloy, aluminum manganese alloy and aluminum copper alloy; the second material comprises aluminum-zirconium alloy, aluminum-antimony alloy and aluminum-titanium alloy; the third material comprises magnesium ingots and aluminum-strontium alloy.
8. The method according to claim 7, wherein the second material further comprises a rare earth alloy, and the rare earth alloy is lanthanum-cerium-rare earth alloy.
9. The method according to claim 7, wherein,
the temperature of the first alloying treatment is 740-760 ℃;
the temperature of the second alloying treatment is 740-760 ℃;
the temperature of the third alloying treatment is 720-730 ℃;
the smelting temperature is 710-720 ℃;
the conditions of the high-pressure die casting include: the temperature is 670-710 ℃, the pressure is 25-70 MPa, and the injection speed is 4.0-7.0 m/s.
10. A thin-walled component of an automotive body structure, comprising a die-cast aluminum alloy, wherein the die-cast aluminum alloy is a heat-treatment-free die-cast aluminum alloy as defined in any one of claims 1 to 6 or a heat-treatment-free die-cast aluminum alloy prepared by the preparation method as defined in any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410257029.1A CN117845107A (en) | 2024-03-06 | 2024-03-06 | Heat-treatment-free die-casting aluminum alloy and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410257029.1A CN117845107A (en) | 2024-03-06 | 2024-03-06 | Heat-treatment-free die-casting aluminum alloy and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117845107A true CN117845107A (en) | 2024-04-09 |
Family
ID=90542144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410257029.1A Pending CN117845107A (en) | 2024-03-06 | 2024-03-06 | Heat-treatment-free die-casting aluminum alloy and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117845107A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070144629A1 (en) * | 2003-12-18 | 2007-06-28 | Showa Denko K.K. | Method for producing shaped article of aluminum alloy, shaped aluminum alloy article and production system |
| JP2015137388A (en) * | 2014-01-22 | 2015-07-30 | 日産自動車株式会社 | Aluminum alloy casting and manufacturing method therefor |
| CN115233049A (en) * | 2022-07-29 | 2022-10-25 | 湖南江滨机器（集团）有限责任公司 | Heat treatment-free aluminum alloy and preparation method thereof |
| CN116334456A (en) * | 2022-10-31 | 2023-06-27 | 小米汽车科技有限公司 | Heat-treatment-free die-casting aluminum alloy and preparation method and application thereof |
| CN117026023A (en) * | 2023-08-17 | 2023-11-10 | 山西瑞格金属新材料有限公司 | Heat-treatment-free high-strength high-toughness die-casting aluminum alloy and preparation method thereof |
-
2024
- 2024-03-06 CN CN202410257029.1A patent/CN117845107A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070144629A1 (en) * | 2003-12-18 | 2007-06-28 | Showa Denko K.K. | Method for producing shaped article of aluminum alloy, shaped aluminum alloy article and production system |
| JP2015137388A (en) * | 2014-01-22 | 2015-07-30 | 日産自動車株式会社 | Aluminum alloy casting and manufacturing method therefor |
| CN115233049A (en) * | 2022-07-29 | 2022-10-25 | 湖南江滨机器（集团）有限责任公司 | Heat treatment-free aluminum alloy and preparation method thereof |
| CN116334456A (en) * | 2022-10-31 | 2023-06-27 | 小米汽车科技有限公司 | Heat-treatment-free die-casting aluminum alloy and preparation method and application thereof |
| CN117026023A (en) * | 2023-08-17 | 2023-11-10 | 山西瑞格金属新材料有限公司 | Heat-treatment-free high-strength high-toughness die-casting aluminum alloy and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109338180B (en) | High-toughness cast aluminum-silicon alloy and preparation method and application thereof | |
| EP4249617A1 (en) | Non-heat-treated reinforced high-strength and high-toughness die-cast aluminum-silicon alloy and preparation method therefor | |
| CN109881063B (en) | High-strength, high-toughness and high-modulus die-casting magnesium alloy and preparation method thereof | |
| CN110079712B (en) | Cast high-toughness die-casting aluminum-silicon alloy and preparation method and application thereof | |
| CN110453115B (en) | Novel automobile transmission shell die-casting aluminum alloy and preparation process thereof | |
| CN116334456B (en) | Heat-treatment-free die-casting aluminum alloy and preparation method and application thereof | |
| CN108251714B (en) | Extrusion casting high-strength and high-toughness aluminum alloy and extrusion casting method thereof | |
| CN111101031B (en) | Al-Mg2Si-Mg-Mn-Y-B high-strength and high-toughness aluminum alloy and preparation method thereof | |
| CN115961186A (en) | Die-casting aluminum alloy material and preparation method and application thereof | |
| EP4234737A1 (en) | Aluminum alloy and component part prepared therefrom | |
| CN114231800B (en) | High-performance low-carbon aluminum alloy and preparation method thereof | |
| CN113667850B (en) | Method for preparing ZL111 from waste aluminum alloy | |
| CN113652581B (en) | Aluminum alloy and preparation method and application thereof | |
| CN115627394A (en) | High-pressure cast aluminum alloy for automobile integrated auxiliary frame and preparation method thereof | |
| CN117845107A (en) | Heat-treatment-free die-casting aluminum alloy and preparation method and application thereof | |
| CN113278831B (en) | Method for preparing regenerated ADC12 aluminum alloy from scrap aluminum | |
| CN114480930B (en) | Aluminum alloy section for passenger car body framework and preparation method thereof | |
| CN114774740A (en) | High-strength high-plasticity die-casting aluminum alloy material and preparation method thereof | |
| CN117684053B (en) | Near-eutectic die-casting aluminum-silicon alloy material free of heat treatment and preparation method thereof | |
| CN117488148B (en) | Cast aluminum alloy and preparation method and application thereof | |
| CN118048544A (en) | Preparation method and die casting method of heat-treatment-free die-casting aluminum-silicon alloy material | |
| CN117965968A (en) | Die-casting aluminum alloy and preparation method thereof | |
| CN117187629A (en) | Heat-treatment-free high-melting-point die-casting aluminum alloy suitable for brazing and preparation method thereof | |
| CN116623047A (en) | Aluminum alloy, preparation method thereof and die casting | |
| CN117448635A (en) | Non-heat treatment reinforced aluminum-based titanium diboride composite material for die casting and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |