CN108220718A - A kind of high intensity high-yield-ratio cast aluminium alloy material and preparation method thereof - Google Patents
A kind of high intensity high-yield-ratio cast aluminium alloy material and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—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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Abstract
The invention discloses a kind of cast aluminium alloy material of high intensity high-yield-ratio, the chemical composition composition of alloy material includes：13.0 19.0wt.% of content of Zn, the content of Si is 8.0 13.0wt.%, the content of Cu is 1.0 3.0wt.%, the content of Mg is 0.05 0.30wt.%, and the content of Mn is 0.10 0.50wt.%, and the content of Fe is 0.15 0.80wt.%, the content of Ti is 0.05 0.25wt.%, the content of RE is 0.05~0.20wt.%, remaining is aluminium and other impurity elements, other impurity content≤0.15%.
Description
Technical field
The present invention relates to metal material field, more particularly, to a kind of high intensity high-yield-ratio cast aluminium alloy material and its
Preparation method.
Background technology
As automobile fuel efficiency and energy-saving and environment-friendly requirement are continuously improved, automotive light weight technology must go really.Using lightweight
High-strength material becomes one of lightweight main method in auto industry, and wherein aluminium alloy becomes the head of light weight material in automobile
Choosing.According to statistics, aluminium alloy castings account for about the 77% of automobile aluminum amount, and wherein die casting accounts for the 50% of automobile aluminum amount, typical portion
Part includes engine cylinder body, cylinder cap, bell housing, oil sump, engine bracker etc..Since die casting is unable to heat treatment reinforcement,
And there are problems that shrinkage porosite and shrinkage cavity, die casting performance is not generally high, can not meet and further be subtracted by Optimal Structure Designing
The requirement of light weight is badly in need of researching and developing a kind of high-perforance compression casting aluminium alloy material from reinforcing of obstructed Overheating Treatment, this is for vapour
The high development of the lightweight requirements such as vehicle, mobile communication is very necessary.
At present, only has Al-Zn series from the cast aluminium alloy gold series strengthened, this is that alloy just has quenching in as-cast condition
Tissue signature is achieved with high intensity without heat treatment, if China's aluminium alloy trade mark is ZL401, ZL402 alloy, has
Good casting character, cutting ability, welding performance and dimensional stability, deformation caused by can exempting quenching process and size become
Change, but generate decrepitation, and intensity is not high, hinders the application of alloy.
The present invention is optimized based on existing Al-Zn series cast aluminium alloy gold by polynary alloy, and exploitation is a kind of high-strength
The Al-Zn-Si-Cu-Mg-Mn-Fe-RE alloys of high-yield-ratio are spent, to meet the needs of automobile, mobile communication industry.
Invention content
The technical problem to be solved in the present invention is to provide a kind of high intensity high-yield-ratio cast aluminium alloy material and its preparations
Method, the alloy casting fluidity can be good, and suitable for casting techniques such as die casting, gravitational casting, low pressure castings, the casting of preparation is cast
State intensity and yield tensile ratio height, parts complex-shaped available for automobile and communications industry and higher to intensity, rigidity requirement, tool
There is good application prospect.
In order to solve the above technical problem, the present invention provides a kind of cast aluminium alloy material of high intensity high-yield-ratio,
It is characterized in that, the chemical composition composition of the alloy material includes：The content of the content 13.0-19.0wt.%, Si of Zn is
The content of 8.0-13.0wt.%, Cu are 1.0-3.0wt.%, and the content of Mg is 0.05-0.30wt.%, and the content of Mn is 0.10-
The content of 0.50wt.%, Fe are 0.15-0.80wt.%, and the content of Ti is 0.05-0.25wt.%, the content of RE for 0.05~
0.20wt.%, remaining is aluminium and other impurity elements, other impurity content≤0.15%.
Preferably, Zn is added in the form of pure Zn ingots in aluminum alloy materials；Si is with metal Si or Al-Si intermediate alloy shape
Formula is added in aluminum alloy materials.
Preferably, Cu is added in the form of red copper or Al-Cu intermediate alloys in aluminum alloy materials.
Preferably, Mg elements are added in the form of pure Mg ingots in aluminum alloy materials.
Preferably, Mn is added in the form of electrolytic manganese or Al-Mn intermediate alloys in aluminum alloy materials.
Preferably, Fe is added in the form of Al-Fe intermediate alloys in aluminum alloy materials.
Preferably, Al is added in the form of pure Al ingots in aluminum alloy materials.
Preferably, Ti elements are added in Al-Ti-C or Al-Ti-B alloy forms in aluminum alloy materials.
Preferably, RE elements are added in the form of Al-RE intermediate alloys in aluminum alloy materials.
Preferably, a kind of preparation method of the cast aluminium alloy material of high intensity high-yield-ratio, includes the following steps：
(1) burner hearth is cleaned up, raw material are prepared according to alloying component ratio；
(2) aluminium ingot is put into stove, is warming up to 750-800 DEG C, after aluminium ingot all fusing, by ready metal Si or
Al-Si intermediate alloys, red copper or Al-Cu intermediate alloys and electrolytic manganese or Al-Mn intermediate alloys are added in molten aluminum；
(3) after metal all fusing, 700-720 DEG C of heat preservation is cooled to, adds in ready Zn ingots, Mg ingots and Al-Fe
Intermediate alloy；
(4) after metal all fusing, adjustment temperature of aluminum liquid to 720-730 DEG C of heat preservation is special using refining spoon aluminium alloy
Melt is pressed into, and stirring is abundant up and down or refining agent is sprayed into melt, degasification by the use of high purity inert gas as carrier with refining agent
Removal of impurities.Standing is skimmed after five minutes；
(5) it adds in and gets out Al-Ti-B, Al-RE intermediate alloy, 10 minutes are stood after stirring fully.It skims after standing；
(6) it will be preheated equipped with 30-50cm thickness, the chute of 30 mesh ceramic filter casees, molten aluminum distribution drum, chain type ingot casting machine mold
To 150-200 DEG C, and start chain type ingot casting machine and molten aluminum distribution drum, extract smelting furnace chock plug, start to pour into a mould, high intensity height is made and bends
Compare aluminium alloy ingots by force.
The technique effect of the present invention：
The Al-Zn-Si-Cu-Mg-Mn-Fe-Ti-RE alloys of the present invention, which contain three kinds of aluminium alloys such as Zn, Cu, Mg, strengthens member
Element, the Zn of high level can form solid solution, and form MgZn with Mg with Al2Hardening constituent improves alloy strength, while improves Cu
Low-alloyed hot cracking tendency drops in the maxima solubility of element；The effect of Si elements is to ensure that alloy has good casting character；
The effect of Fe elements is to reduce mold sticking, is improved die life, and the effect of Mn elements predominantly improves the form of Fe phases, improves
Alloy plasticity；The effect of Ti elements is mainly thinning microstructure, and the effect of RE elements predominantly purifies melt, crystal grain thinning.Therefore,
The aluminum alloy materials of the present invention not only have good casting character and from reinforcing properties, also with high intensity, high-yield-ratio etc.
Advantage, room temperature tensile intensity 320-400MPa, yield strength 280-360MPa, yield tensile ratio 0.85-0.95, elongation percentage 0.8-
4.0%, hardness 130-170HV, particularly suitable for die-casting process.
Description of the drawings
Alloy microstructure photo in Fig. 1 embodiments 1；
Specific embodiment
With reference to specific embodiment, the invention will be further described, so that those skilled in the art can be preferably
Understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Embodiment 1：
For being matched according to Al-13.1Zn-10.5Si-2.0Cu-0.15Mg-0.2Mn-0.3Fe-0.1Ti-0.06RE, meter
The quality of raw material needed for 15t alloys is calculated, is stocked up.
(1) burner hearth is cleaned up, raw material are prepared according to alloy mentioned component ratio.
(2) aluminium ingot is put into stove, is warming up to 750 DEG C, after aluminium ingot all fusing, by ready metal Si, red copper
It is added in molten aluminum with electrolytic manganese；
(3) after metal all fusing, 710 DEG C of heat preservation is cooled to, is added among ready Zn ingots, Mg ingots and Al-Fe
Alloy；
(4) after metal all fusing, adjustment temperature of aluminum liquid to 720 DEG C of heat preservations, using the refining special essence of spoon aluminium alloy
Agent press-in melt is refined, and stirring is abundant up and down or refining agent is sprayed into melt by the use of high purity inert gas as carrier, degasification removes
It is miscellaneous.Standing is skimmed after five minutes；
(5) it adds in and gets out Al-Ti-B, Al-RE intermediate alloy, 10 minutes are stood after stirring fully.It skims after standing.
(6) it will be preheated to equipped with 30cm thickness, the chute of 30 mesh ceramic filter casees, molten aluminum distribution drum, chain type ingot casting machine mold
150 DEG C, and start chain type ingot casting machine and molten aluminum distribution drum, smelting furnace chock plug is extracted, starts to pour into a mould, high intensity high-yield-ratio aluminium is made
Alloy pig.
(7) chemical composition and mechanical property of beta alloy ingot observes alloy microstructure.
Embodiment 2：
For being matched according to Al-14.8Zn-9.5Si-1.6Cu-0.18Mg-0.3Mn-0.4Fe-0.15Ti-0.10RE, meter
The quality of simple substance and intermediate alloy needed for calculating 15t alloys, stocks up.
(1) burner hearth is cleaned up, raw material are prepared according to alloy mentioned component ratio.
(2) aluminium ingot is put into stove, is warming up to 760 DEG C, after aluminium ingot all fusing, will closed among ready Al-Si
Gold, Al-Cu intermediate alloys and Al-Mn intermediate alloys are added in molten aluminum；
(3) after metal all fusing, 720 DEG C of heat preservation is cooled to, is added among ready Zn ingots, Mg ingots and Al-Fe
Alloy；
(4) after metal all fusing, adjustment temperature of aluminum liquid to 720 DEG C of heat preservations, using the refining special essence of spoon aluminium alloy
Agent press-in melt is refined, and stirring is abundant up and down or refining agent is sprayed into melt by the use of high purity inert gas as carrier, degasification removes
It is miscellaneous.Standing is skimmed after five minutes；
(5) it adds in and gets out Al-Ti-B, Al-RE intermediate alloy, 10 minutes are stood after stirring fully.It skims after standing.
(6) it will be preheated to equipped with 30cm thickness, the chute of 30 mesh ceramic filter casees, molten aluminum distribution drum, chain type ingot casting machine mold
150 DEG C, and start chain type ingot casting machine and molten aluminum distribution drum, smelting furnace chock plug is extracted, starts to pour into a mould, high intensity high-yield-ratio aluminium is made
Alloy pig.
(7) chemical composition and mechanical property of beta alloy ingot.
Embodiment 3：
It is according to Al-16.60Zn-11.0Si-2.9Cu-0.25Mg-0.36Mn-0.6Fe-0.18Ti-0.15R E proportionings
Example, calculates the quality of raw material needed for 15t alloys, stocks up.
(1) burner hearth is cleaned up, raw material are prepared according to alloy mentioned component ratio.
(2) aluminium ingot is put into stove, is warming up to 780 DEG C, after aluminium ingot all fusing, by ready metal Si, Al-Cu
Intermediate alloy and electrolytic manganese are added in molten aluminum；
(3) after metal all fusing, 720 DEG C of heat preservation is cooled to, is added among ready Zn ingots, Mg ingots and Al-Fe
Alloy；
(4) after metal all fusing, adjustment temperature of aluminum liquid to 730 DEG C of heat preservations, using the refining special essence of spoon aluminium alloy
Agent press-in melt is refined, and stirring is abundant up and down or refining agent is sprayed into melt by the use of high purity inert gas as carrier, degasification removes
It is miscellaneous.Standing is skimmed after five minutes；
(5) it adds in and gets out Al-Ti-B, Al-RE intermediate alloy, 10 minutes are stood after stirring fully.It skims after standing.
(6) it will be preheated to equipped with 30cm thickness, the chute of 30 mesh ceramic filter casees, molten aluminum distribution drum, chain type ingot casting machine mold
150 DEG C, and start chain type ingot casting machine and molten aluminum distribution drum, smelting furnace chock plug is extracted, starts to pour into a mould, high intensity high-yield-ratio aluminium is made
Alloy pig.
(7) chemical composition and mechanical property of beta alloy ingot.
Embodiment 4：
For being matched according to Al-18.9Zn-12.7Si-2.4Cu-0.29Mg-0.4Mn-0.8Fe-0.23Ti-0.18RE,
The quality of raw material needed for 15t alloys is calculated, is stocked up.
(1) burner hearth is cleaned up, raw material are prepared according to alloy mentioned component ratio.
(2) aluminium ingot is put into stove, is warming up to 800 DEG C, after aluminium ingot all fusing, will closed among ready Al-Si
Gold, red copper and Al-Mn intermediate alloys are added in molten aluminum；
(3) after metal all fusing, 720 DEG C of heat preservation is cooled to, is added among ready Zn ingots, Mg ingots and Al-Fe
Alloy；
(4) after metal all fusing, adjustment temperature of aluminum liquid to 730 DEG C of heat preservations, using the refining special essence of spoon aluminium alloy
Agent press-in melt is refined, and stirring is abundant up and down or refining agent is sprayed into melt by the use of high purity inert gas as carrier, degasification removes
It is miscellaneous.Standing is skimmed after five minutes；
(5) it adds in and gets out Al-Ti-B, Al-RE intermediate alloy, 10 minutes are stood after stirring fully.It skims after standing.
(6) it will be preheated to equipped with 30cm thickness, the chute of 30 mesh ceramic filter casees, molten aluminum distribution drum, chain type ingot casting machine mold
150 DEG C, and start chain type ingot casting machine and molten aluminum distribution drum, smelting furnace chock plug is extracted, starts to pour into a mould, high intensity high-yield-ratio aluminium is made
Alloy pig.
(7) chemical composition and mechanical property of beta alloy ingot.
The chemical composition comparison of Examples 1 to 4 aluminium alloy is shown in Table 1.
The chemical composition (wt.%) of aluminium alloy in 1 Examples 1 to 4 of table
The chemical composition comparison of Examples 1 to 4 aluminium alloy is shown in Table 2.
The mechanical property of aluminium alloy in 2 Examples 1 to 4 of table
Have shown in Fig. 1 and table 1-2, above-mentioned Al-Zn-Si-Cu-Mg-Mn-Fe-Ti-RE alloys contain Zn, Cu, Mg etc. three
Kind aluminium alloy intensified element, the Zn of high level can form solid solution, and form MgZn with Mg with Al2Hardening constituent improves alloy
Intensity, while the maxima solubility of Cu elements is improved, low-alloyed hot cracking tendency drops；The effect of Si elements is to ensure that alloy has
Good casting character；The effect of Fe elements is to reduce mold sticking, is improved die life, and the effect of Mn elements predominantly improves
The form of Fe phases improves alloy plasticity；The effect of Ti elements is mainly thinning microstructure, and the effect of RE elements, which predominantly purifies, melts
Body, crystal grain thinning.Therefore, aluminum alloy materials of the invention not only have good casting character and from reinforcing properties, also have
The advantages that high intensity, high-yield-ratio, room temperature tensile intensity 320-400MPa, yield strength 280-360MPa, yield tensile ratio 0.85-
0.95, elongation percentage 0.8-4.0%, hardness 130-170HV, particularly suitable for die-casting process.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.The equivalent substitute or transformation that those skilled in the art are made on the basis of the present invention, in the present invention
Protection domain within.Protection scope of the present invention is subject to claims.
Claims (10)
- A kind of 1. cast aluminium alloy material of high intensity high-yield-ratio, which is characterized in that the chemical composition group of the alloy material Into including：The content of the content 13.0-19.0wt.%, Si of Zn are 8.0-13.0wt.%, and the content of Cu is 1.0-3.0wt.%, The content of Mg is 0.05-0.30wt.%, and the content of Mn is 0.10-0.50wt.%, and the content of Fe is 0.15-0.80wt.%, Ti Content for 0.05-0.25wt.%, the content of RE is 0.05~0.20wt.%, remaining is aluminium and other impurity elements, other Impurity content≤0.15%.
- 2. the cast aluminium alloy material of a kind of high intensity high-yield-ratio according to claim 1, which is characterized in that Zn is with pure The form of Zn ingots is added in aluminum alloy materials；Si is added in the form of metal Si or Al-Si intermediate alloy in aluminum alloy materials.
- 3. the cast aluminium alloy material of a kind of high intensity high-yield-ratio according to claim 1, which is characterized in that Cu is with purple Copper or Al-Cu intermediate alloys form are added in aluminum alloy materials.
- A kind of 4. cast aluminium alloy material of high intensity high-yield-ratio according to claim 1, which is characterized in that Mg elements It is added in aluminum alloy materials in the form of pure Mg ingots.
- 5. the cast aluminium alloy material of a kind of high intensity high-yield-ratio according to claim 1, which is characterized in that Mn is with electricity It solves manganese or Al-Mn intermediate alloys form is added in aluminum alloy materials.
- 6. a kind of cast aluminium alloy material of high intensity high-yield-ratio according to claim 1, which is characterized in that Fe with Al-Fe intermediate alloys form is added in aluminum alloy materials.
- 7. the cast aluminium alloy material of a kind of high intensity high-yield-ratio according to claim 1, which is characterized in that Al is with pure The form of Al ingots is added in aluminum alloy materials.
- A kind of 8. cast aluminium alloy material of high intensity high-yield-ratio according to claim 1, which is characterized in that Ti elements It is added in aluminum alloy materials with Al-Ti-C or Al-Ti-B alloy forms.
- A kind of 9. cast aluminium alloy material of high intensity high-yield-ratio according to claim 1, which is characterized in that RE elements It is added in aluminum alloy materials in the form of Al-RE intermediate alloys.
- 10. a kind of preparation method of the cast aluminium alloy material of high intensity high-yield-ratio, which is characterized in that include the following steps：(1) burner hearth is cleaned up, raw material are prepared according to alloying component ratio；(2) aluminium ingot is put into stove, is warming up to 750-800 DEG C, after aluminium ingot all fusing, by ready metal Si or Al- Si intermediate alloys, red copper or Al-Cu intermediate alloys and electrolytic manganese or Al-Mn intermediate alloys are added in molten aluminum；(3) after metal all fusing, 700-720 DEG C of heat preservation is cooled to, is added among ready Zn ingots, Mg ingots and Al-Fe Alloy；(4) after metal all fusing, adjustment temperature of aluminum liquid to 720-730 DEG C of heat preservation, using the refining special essence of spoon aluminium alloy Agent press-in melt is refined, and stirring is abundant up and down or refining agent is sprayed into melt by the use of high purity inert gas as carrier, degasification removes It is miscellaneous.Standing is skimmed after five minutes；(5) it adds in and gets out Al-Ti-B, Al-RE intermediate alloy, 10 minutes are stood after stirring fully.It skims after standing；(6) it will be preheated to equipped with 30-50cm thickness, the chute of 30 mesh ceramic filter casees, molten aluminum distribution drum, chain type ingot casting machine mold 150-200 DEG C, and start chain type ingot casting machine and molten aluminum distribution drum, smelting furnace chock plug is extracted, starts to pour into a mould, high intensity height is made and bends by force Compare aluminium alloy ingots.
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| CN110157963A (en) * | 2019-06-21 | 2019-08-23 | 广东省材料与加工研究所 | A kind of pack alloy and the preparation method and application thereof for smart phone |
| CN110157959A (en) * | 2019-06-21 | 2019-08-23 | 广东省材料与加工研究所 | A kind of pack alloy of high-intensity and high-tenacity and preparation method thereof |
| CN113046607A (en) * | 2021-03-16 | 2021-06-29 | 郑州大学 | High-hardness high-thermal conductivity multi-element alloy and preparation method thereof |
| CN114908275A (en) * | 2022-06-08 | 2022-08-16 | 广东省科学院新材料研究所 | Heat-treatment-free high-strength and high-toughness die-casting aluminum alloy, and preparation method and application thereof |
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