CN116377262A - Manufacturing method of high-pressure casting aluminum alloy for brazing - Google Patents
Manufacturing method of high-pressure casting aluminum alloy for brazing Download PDFInfo
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- CN116377262A CN116377262A CN202310370892.3A CN202310370892A CN116377262A CN 116377262 A CN116377262 A CN 116377262A CN 202310370892 A CN202310370892 A CN 202310370892A CN 116377262 A CN116377262 A CN 116377262A
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- aluminum alloy
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- braze
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- casting aluminum
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 66
- 238000005266 casting Methods 0.000 title claims abstract description 47
- 238000005219 brazing Methods 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 25
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000011572 manganese Substances 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 16
- 238000007670 refining Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 15
- 238000004512 die casting Methods 0.000 claims abstract description 13
- 239000011777 magnesium Substances 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 239000010703 silicon Substances 0.000 claims abstract description 10
- 239000010936 titanium Substances 0.000 claims abstract description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 239000011651 chromium Substances 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 239000010949 copper Substances 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 239000011701 zinc Substances 0.000 claims abstract description 7
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 5
- 239000001257 hydrogen Substances 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 3
- 229910052746 lanthanum Inorganic materials 0.000 claims description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 3
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract 1
- 239000000956 alloy Substances 0.000 description 18
- 229910045601 alloy Inorganic materials 0.000 description 17
- 239000000463 material Substances 0.000 description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 238000005728 strengthening Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 3
- 230000005496 eutectics Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- -1 lanthanum cerium rare earth Chemical class 0.000 description 3
- 229910000676 Si alloy Inorganic materials 0.000 description 2
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 229910018084 Al-Fe Inorganic materials 0.000 description 1
- 229910018131 Al-Mn Inorganic materials 0.000 description 1
- 229910018182 Al—Cu Inorganic materials 0.000 description 1
- 229910018192 Al—Fe Inorganic materials 0.000 description 1
- 229910018461 Al—Mn Inorganic materials 0.000 description 1
- 229910018575 Al—Ti Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- YNDGDLJDSBUSEI-UHFFFAOYSA-N aluminum strontium Chemical compound [Al].[Sr] YNDGDLJDSBUSEI-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The application discloses a method for manufacturing a high-pressure casting aluminum alloy for brazing, which comprises the following steps: s1, melting a reclaimed aluminum raw material, and controlling the temperature of an aluminum liquid to be between 710 and 730 ℃, wherein the aluminum liquid comprises: up to 0.5 wt% silicon, up to 0.5 wt% iron; up to 0.3 wt% copper, up to 0.3 wt% zinc, 0.6 to 1.5 wt% manganese, up to 0.2 wt% chromium, 0.3 to 1.0 wt% magnesium, up to 0.05 wt% titanium, and 5.0 to 12.0 wt% rare earth; wherein the rare earth: controlling the Mn to be 2.0-3.8; s2, pressing the sodium-free aluminum alloy refining agent into the aluminum alloy through a deaerator for refining, and refining for a preset time to remove gas in the aluminum liquid; s3, detecting the gas content by a hydrogen detector, and when the gas content is below 0.15ml/100g, performing die casting by an aluminum alloy high-pressure casting device to form the low-carbon high-pressure casting heat-treatment-free aluminum alloy.
Description
Technical Field
The invention relates to the field of aluminum alloy materials, in particular to a manufacturing method of high-pressure casting aluminum alloy for brazing.
Background
Brazing refers to a welding method for connecting metals by filling gaps of solid workpieces with liquid brazing filler metal after the brazing filler metal below the melting point of a weldment and the weldment are heated to the melting temperature of the brazing filler metal at the same time. Because the aluminum alloy has the characteristics of better heat conduction, higher strength, light use and economy. Therefore, they are widely used as a material for their constituent parts in various fields such as automobiles, industrial machines, aircrafts, household electrical appliances, and others.
At present, a plurality of parts are required to be assembled by high-temperature brazing, in particular to the existing new energy automobile water cooling plate, and a product substrate is welded by thick processing of sectional materials, so that the cost is high and the efficiency is low. The existing high-efficiency high-pressure casting aluminum alloy has the problems that the melting point is low and the high-temperature brazing temperature cannot be reached during brazing, so that softening and even melting can occur during long-time soaking in a high-temperature brazing groove, or the casting fluidity is poor, the shrinkage is high and the like, and the casting defects of air holes and the like in the product are large, so that foaming conditions occur during brazing, the quality is unqualified and the high-efficiency high-pressure casting aluminum alloy cannot be applied to the existing high-pressure casting.
Disclosure of Invention
An advantage of the present invention is to provide a method for manufacturing a high pressure cast aluminum alloy useful for brazing, wherein said high pressure cast aluminum alloy manufactured is in as-cast >110MPa tensile yield limit rp0.2, while >5.0% elongation at break a, >210MPa tensile strength Rm, particularly suitable for brazing.
To achieve at least one of the above advantages, the present invention provides a method of manufacturing a high pressure casting aluminum alloy usable for brazing, wherein the method of manufacturing a high pressure casting aluminum alloy usable for brazing includes:
s1, melting a reclaimed aluminum raw material, and controlling the temperature of an aluminum liquid to be between 710 and 730 ℃;
wherein the aluminum liquid comprises:
up to 0.5 wt% silicon;
up to 0.5 wt.% iron;
up to 0.3 wt% copper;
up to 0.3 wt% zinc;
0.6 to 1.5 wt% manganese;
up to 0.2 wt% chromium;
0.3 to 1.0 weight percent magnesium;
up to 0.05 wt% titanium;
5.0 to 12.0 weight percent rare earth; wherein the rare earth: and 3 x Mn is controlled between 2.0 and 3.8.
S2, pressing the sodium-free aluminum alloy refining agent into the aluminum alloy through a deaerator for refining, and refining for a preset time to remove gas in the aluminum liquid;
s3, detecting the gas content by a hydrogen detector, and when the gas content is below 0.15ml/100g, performing die casting by an aluminum alloy high-pressure casting device to form the low-carbon high-pressure casting heat-treatment-free aluminum alloy.
According to an embodiment of the invention, the rare earth is implemented as at least one selected from lanthanum or cerium.
According to an embodiment of the invention, wherein the rare earth: the weight percentage of 3-Mn is controlled between 2.0 and 2.8.
According to an embodiment of the invention, the high pressure casting aluminum alloy useful for brazing comprises at most 0.5% by weight silicon.
According to an embodiment of the invention, the high pressure casting aluminum alloy usable for brazing comprises at most 0.5% by weight of iron.
According to an embodiment of the invention, the high pressure casting aluminum alloy usable for brazing comprises at most 0.3% by weight copper.
According to an embodiment of the invention, the high pressure casting aluminum alloy useful for brazing comprises at most 0.3 wt.% zinc.
According to an embodiment of the invention, the high pressure casting aluminum alloy usable for brazing comprises at most 0.2% by weight chromium.
According to an embodiment of the invention, the high pressure casting aluminum alloy useful for brazing comprises at most 0.05 wt.% titanium.
According to an embodiment of the invention, the high pressure casting aluminum alloy useful for brazing includes a minimum of 0.2 wt.% iron.
Drawings
Fig. 1 shows a gold phase diagram of a brazeable high thermal conductivity high pressure cast aluminum alloy after brazing.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and this summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
Referring to fig. 1, a high pressure casting aluminum alloy capable of brazing high thermal conductivity according to a preferred embodiment of the present invention will be described in detail below, wherein the high pressure casting aluminum alloy capable of brazing high thermal conductivity comprises:
up to 0.5 wt% silicon;
up to 0.5 wt.% iron;
up to 0.3 wt% copper;
up to 0.3 wt% zinc;
0.6 to 1.5 wt% manganese;
up to 0.2 wt% chromium;
0.3 to 1.0 weight percent magnesium;
up to 0.05 wt% titanium;
5.0 to 12.0 weight percent rare earth; wherein the rare earth: the weight percentage of 3.0 to 3.8 of Mn.
Preferably, the rare earth is implemented as at least one selected from lanthanum cerium rare earth.
Also preferably, wherein the rare earth: the weight percentage of 3-Mn is controlled between 2.0 and 2.8.
In conventional aluminum-silicon based alloys, silicon increases the flowability of the material primarily, but the system alloy relies primarily on AL-Fe eutectic, if added in excess, reduces the solidus temperature of the material, affects brazing, and silicon forms an AlFeSi phase with iron, reduces material elongation, impedes electron movement, reduces heat conduction, and preferably has a silicon content of up to 0.3 wt.%. Preferably, the silicon content is a minimum of 0.01 wt.%.
Mn can change the morphology of beta-Fe phase to alpha-AlFeSi. This is because Mn and Fe have similar atomic radii. Mn can therefore be replaced by Fe and the beta-Fe phase can be converted to alpha-AlFeSi. Adding a certain amount of Mn consumes eutectic Fe content, and reduces the fluidity of the material and the heat conduction of the material; in the material system, because the iron content is low, mn is mainly dissolved in an aluminum matrix to generate eutectic, so that the die sticking in the die casting process can be solved, the strength and the flowability of the material are improved, the melting point of the material is not reduced, and the requirement of brazing at not lower than 600 ℃ is met; iron is added up to 0.5% by weight. Preferably, iron is added at a minimum of 0.2 wt.%.
Rare earth exists in three forms in aluminum alloy, and is solid-dissolved in matrix alpha (Al); the segregation is in phase boundaries, grain boundaries and dendrite boundaries; solid solutions in or in the form of compounds. The strengthening effect of the rare earth in the aluminum alloy mainly comprises fine crystal strengthening, limited solid solution strengthening, second phase strengthening of rare earth compounds and the like; 5.0 to 12.0 weight percent of rare earth is added in a state exceeding supersaturation, the strengthening is mainly carried out after the addition, the recrystallization temperature of the alloy is improved, the aluminum matrix is thinned, the strength is increased, the electric conduction is reduced less, and the effect of high heat conduction can be achieved; the existing form of the iron phase is changed, and the casting performance of the aluminum alloy is improved.
The magnesium can enhance the strength and the hardness of the alloy when the proportion of the magnesium in the die-casting aluminum alloy is 0.3 to 1.0 weight percent, because the magnesium is mainly added into the aluminum-silicon alloy and is mainly added into the aluminum-silicon alloy 2 The yield strength can be increased by 5-10 Mpa when 0.1% of magnesium is added to Si phase, the element is obvious for improving the strength of aluminum alloy, and the price and the aluminum difference are small.
Rare earth: the weight percentage of 3-Mn is controlled between 2.0-3.8, the proportion is lower than 2.0, the aluminum matrix cannot be thinned, and the strength cannot meet the requirement. The proportion is higher than 3.8, and the excessive rare earth compound can not solve the problem of sticking the mold.
According to another aspect of the present invention, there is provided a method for manufacturing a solderable high heat conduction high pressure cast aluminum alloy, wherein the method for manufacturing a high pressure cast aluminum alloy comprises:
s1, melting a reclaimed aluminum raw material, and controlling the temperature of an aluminum liquid to be between 710 and 730 ℃;
wherein the aluminum liquid comprises:
up to 0.5 wt% silicon;
up to 0.5 wt.% iron;
up to 0.3 wt% copper;
up to 0.3 wt% zinc;
0.6 to 1.5 wt% manganese;
up to 0.2 wt% chromium;
0.3 to 1.0 weight percent magnesium;
up to 0.05 wt% titanium;
5.0 to 12.0 weight percent rare earth; wherein the rare earth: and 3 x Mn is controlled between 2.0 and 3.8.
S2, pressing the sodium-free aluminum alloy refining agent into the aluminum alloy through a deaerator for refining, and refining for a preset time to remove gas in the aluminum liquid;
s3, detecting the gas content by a hydrogen detector, and when the gas content is below 0.15ml/100g, performing die casting by an aluminum alloy high-pressure casting device to form the low-carbon high-pressure casting heat-treatment-free aluminum alloy.
Preferably, the method for manufacturing the solderable high-heat-conductivity aluminum alloy comprises the following steps:
s4, material preparation and furnace cleaning: preparing materials according to the proportion of alloy components, and cleaning the furnace after the materials are prepared.
It is worth mentioning that the alloying elements are added in the form of pure alloys or master alloys.
For example, fe element is added in the form of Al-Fe intermediate alloy, mg element is added in the form of pure Mg ingot, mn element is added in the form of Al-Mn intermediate alloy, ti element is added in the form of Al-Ti intermediate alloy, rare earth elements such as lanthanum, cerium, scandium element are added in the form of intermediate alloy.
In the process of melting aluminum ingots, after the surfaces of the reclaimed aluminum raw materials are clean, putting the pure aluminum ingots and rare earth intermediate alloy into a resistance crucible for heating and smelting, and controlling the temperature of aluminum liquid between 710 ℃ and 730 ℃;
in addition to the master alloy: when the temperature of the aluminum liquid reaches 720 ℃, adding the dried Al-Cu intermediate alloy, magnesium ingots, al-Ti and other intermediate alloys into the aluminum liquid, heating the aluminum liquid to 740 ℃, and preserving the heat for 15 minutes to ensure that the added intermediate alloy is completely melted;
when the temperature of the aluminum liquid is reduced to 710-730 ℃ during refining, the sodium-free refining agent of the aluminum alloy is pressed into the aluminum alloy by a movable rotary degassing machine to refine, and the aluminum-strontium intermediate alloy is added during refining to refine for a preset time. Preferably 10-30 minutes, then slagging off and standing. If the mixture is kept stand for 1 hour, an online hydrogen meter is used for detecting the gas content after the mixture is kept stand, and when the gas content is below 0.15ml/100g, die casting is carried out, and if the gas content does not meet the requirement, the refining, modification and degassing process is continued.
And (3) die casting production verification:
1) Production equipment and auxiliary accessories: 280T force die casting machine, automatic soup feeder, mould temperature machine, brand vacuum machine, special inlet release agent for die casting structural part on the market, inlet particle beads, 3mm 80mm 250mm homemade test piece mould (figure 1), 50mm punch and melting cup;
2) And (3) die casting process control: the temperature of the die casting aluminum liquid is controlled between 680 and 690 ℃, the temperature of a die temperature machine is controlled between 160 and 170 ℃, the high-speed is controlled between 2.7 and 2.9m/S, the vacuum degree is controlled between 10 and 40mbar, and the pressurizing pressure is 65Mpa;
3) The following is the test performance of the die-casting test piece with different component proportions according to GBT228 standard test piece wire cutting, using a three-Si tensile machine and an inlet extensometer.
The aluminum alloys for high pressure casting of five examples were manufactured by the above manufacturing processes, respectively, and the properties thereof were examined, and the following table 1 is concrete.
TABLE 1
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.
Claims (10)
1. The manufacturing method of the high-pressure casting aluminum alloy for brazing is characterized by comprising the following steps of:
s1, melting a reclaimed aluminum raw material, and controlling the temperature of an aluminum liquid to be between 710 and 730 ℃;
wherein the aluminum liquid comprises:
up to 0.5 wt% silicon;
up to 0.5 wt.% iron;
up to 0.3 wt% copper;
up to 0.3 wt% zinc;
0.6 to 1.5 wt% manganese;
up to 0.2 wt% chromium;
0.3 to 1.0 weight percent magnesium;
up to 0.05 wt% titanium;
5.0 to 12.0 weight percent rare earth; wherein the rare earth: and 3 x Mn is controlled between 2.0 and 3.8.
S2, pressing the sodium-free aluminum alloy refining agent into the aluminum alloy through a deaerator for refining, and refining for a preset time to remove gas in the aluminum liquid;
s3, detecting the gas content by a hydrogen detector, and when the gas content is below 0.15ml/100g, performing die casting by an aluminum alloy high-pressure casting device to form the low-carbon high-pressure casting heat-treatment-free aluminum alloy.
2. The method for manufacturing a high-pressure casting aluminum alloy usable for brazing according to claim 1, wherein said rare earth is implemented as at least one selected from lanthanum or cerium.
3. The method for manufacturing a high pressure casting aluminum alloy for brazing according to claim 1, wherein the rare earth: the weight percentage of 3-Mn is controlled between 2.0 and 2.8.
4. The method of producing a braze-usable high-pressure casting aluminum alloy according to claim 1, wherein the braze-usable high-pressure casting aluminum alloy comprises silicon in an amount of at least 0.01% by weight.
5. The method of making a braze-enabled high pressure casting aluminum alloy according to claim 1, wherein the braze-enabled high pressure casting aluminum alloy comprises up to 0.5% by weight iron.
6. The method of making a braze-enabled high pressure casting aluminum alloy according to claim 1, wherein the braze-enabled high pressure casting aluminum alloy comprises up to 0.3 weight percent copper.
7. The method of making a braze-enabled high pressure casting aluminum alloy according to claim 1, wherein the braze-enabled high pressure casting aluminum alloy comprises up to 0.3 weight percent zinc.
8. The method of making a braze-enabled high pressure casting aluminum alloy according to claim 1, wherein the braze-enabled high pressure casting aluminum alloy comprises up to 0.2% by weight chromium.
9. The method of making a braze-enabled high pressure casting aluminum alloy according to claim 1, wherein the braze-enabled high pressure casting aluminum alloy comprises up to 0.05% by weight titanium.
10. The method of making a braze-enabled high pressure casting aluminum alloy according to claim 5, wherein the braze-enabled high pressure casting aluminum alloy comprises a minimum of 0.2% by weight iron.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117210725A (en) * | 2023-09-20 | 2023-12-12 | 大连亚明汽车部件股份有限公司 | Low-heat-conductivity high-pressure casting aluminum alloy capable of being brazed |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4038072A (en) * | 1975-05-05 | 1977-07-26 | Ivan Filippovich Kolobnev | Aluminum-base alloy |
| JP2001220639A (en) * | 2000-01-19 | 2001-08-14 | Aluminium Rheinfelden Gmbh | Aluminum alloy for casting |
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