CN109161733A - A kind of the Al-Si-Cu-Mg aluminium alloy and its casting solid solution strength-toughening technique of addition Zn - Google Patents
A kind of the Al-Si-Cu-Mg aluminium alloy and its casting solid solution strength-toughening technique of addition Zn Download PDFInfo
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- CN109161733A CN109161733A CN201811238763.4A CN201811238763A CN109161733A CN 109161733 A CN109161733 A CN 109161733A CN 201811238763 A CN201811238763 A CN 201811238763A CN 109161733 A CN109161733 A CN 109161733A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
Abstract
The invention discloses a kind of Al-Si-Cu-Mg aluminium alloy for adding Zn and its casting solid solution strength-toughening technique, cast aluminium alloy gold raw materials and weight percent are as follows: Zn that Mg, 0.55%-0.65% purity that Al-40Cu, 0.35%-0.45% purity of Al-20Si, 2.38%-2.63% of 42.5%-47.5% are 99.99% are 99.96%, 0.1% Al-10Sr, 0.1% Al-5Ti-1B, surplus are the Al that purity is 99.97%.Higher toughness and intensity can be obtained using the Al-9Si-1Cu-0.4Mg aluminium alloy of the preparation of this technique and solution treatment, the classification of solution treatment simultaneously carries out, reduce energy consumption, natural aging treatment is used after solution treatment, it eliminates artificial aging in heat treatment process to handle, greatly reduces the energy consumption and production cost in heat treatment procedure.
Description
Technical field
The present invention relates to cast aluminium alloy gold technical field, in particular to a kind of Al-Si-Cu-Mg aluminium alloy for adding Zn and
It casts solid solution strength-toughening technique.
Background technique
With energy-saving and emission-reduction, the appearance of environmentally protective policy and implementation, aluminium alloy is as light-weighted preferred material very
It is multi-field to be widely used.Al-Si-Cu-Mg alloy is since its excellent casting character and machining property are in work
Obtain the highest attention of numerous researchers in industry production, meanwhile, Al-Si-Cu-Mg alloy have good fluidity, elevated temperature strength it is high,
The advantages that density is low, mechanical property is good is increasingly being applied to the thin-wall complicated casting in the fields such as automobile, aerospace.
In terms of the Strengthening and Toughening of Al-Si-Cu-Mg alloy, alloy material optimizing components, crystal grain refinement are presently mainly used
With the modes such as optimization of Heat Treatment Process.Alloying component optimization aspect mainly adds other alloying elements, increase in alloy Cu and
The content of Mg, because Al can be precipitated in Cu and Mg in ag(e)ing process2Cu and Mg2Si hardening constituent, but will be greatly reduced alloy simultaneously
Plasticity, that is, the elongation percentage of alloy；General method is addition fining agent in terms of crystal grain refinement, there are also flash set technology,
But the method is all relatively difficult to achieve in technology and cost；Most commonly used cast aluminium alloy gold heat treatment process is exactly T6 heat treatment work
Skill, including solution treatment, quenching and artificial aging when whole process consumption energy consumption, can obtain after Al-Si-Cu-Mg alloy T6 heat treatment
Higher mechanical property is obtained, but elongation percentage is often lower, 5% or more elongation percentage is extremely difficult to.
Summary of the invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of Al-Si-Cu-Mg aluminium conjunctions for adding Zn
Gold and its casting solid solution strength-toughening technique, can obtain higher toughness using the aluminium alloy after the preparation of this technique and solution treatment
And intensity, meanwhile, solution treatment classification carries out, and reduces energy consumption, and alloy uses natural aging treatment after solution treatment,
The artificial aging processing in heat treatment process is decreased, the energy consumption and production cost in heat treatment procedure are greatly reduced.
The technical scheme of the invention to solve the technical problem is:
The present invention proposes a kind of Al-Si-Cu-Mg aluminium alloy for adding Zn, casts the aluminium alloy raw materials and weight hundred
Divide ratio are as follows: Al-20Si:42.5%-47.5%, Al-40Cu:2.38%-2.63%, the Mg:0.35%-0.45% that purity is 99.99%
, the Zn:0.55%-0.65%, Al-10Sr:0.1%, Al-5Ti-1B:0.1% that purity is 99.96%, surplus is that purity is
99.97% Al.
Preferably, the tensile strength of the aluminium alloy is more than or equal to 300Mpa, and yield strength is more than or equal to 220Mpa, extends
Rate is more than or equal to 7.0%.
Preferably, the aluminium alloy raw materials and weight percent are cast are as follows: Al-20Si:45.00 %,
Al-40Cu:2.50 %, the Mg:0.40% that purity is 99.99%, the Zn:0.60%, Al-10Sr that purity is 99.96%:
0.1%, Al-5Ti-1B:0.1%, the Al:51.3 % that purity is 99.97%, the tensile strength of the aluminium alloy are 315Mpa, surrender
Intensity is 225Mpa, elongation percentage 8.9%.
The present invention also proposes a kind of casting solid solution strength-toughening technique of Al-Si-Cu-Mg aluminium alloy for adding Zn, the technique
It comprises the steps of:
(1) Al-40Cu, 0.35%-0.45% purity for weighing Al-20Si, 2.38%-2.63% of 42.5%-47.5% are 99.99%
Mg, 0.55%-0.65% purity be 99.96% Zn, 0.1% Al-10Sr, 0.1% Al-5Ti-1B, surplus be that purity is
99.97% Al is added in resistance furnace and carries out the pre-heat treatment；
(2) the furnace melting of graphite crucible melting resistance, temperature of aluminum liquid after fusing is added in Al, Al-20Si, Al-40Cu after preheating
Control at 730-740 DEG C, then to molten aluminum carry out 20 min refining and remove Slag treatment, later adjust temperature to 720-730 DEG C,
Mg, Zn is added, adjustment temperature carries out the refining of 20 min again and remove Slag treatment at 730-740 DEG C after melting completely；
(3) it goes after the completion of Slag treatment that Al-10Sr, Al-5Ti-1B is added, the Ar that purity is 99.99% is passed through by ceramic degasification stick
Gas, after degasification, adjustment temperature of aluminum liquid is 710 ± 5 DEG C, and heat preservation is poured after standing；
(4) casting after being poured carries out double_stage guide processing, and level-one solid solution is to heat 2h, second level under the conditions of 500 ± 5 DEG C of temperature
Solid solution is to be warming up to 520 ± 5 DEG C of heating 3h after level-one solid solution, is then carried out at quenching in 60-70 DEG C of warm water to casting
Reason obtains the casting solid solution aluminium alloy of addition Zn.
Preferably, in step (1), the temperature of the pre-heat treatment is 100-200 DEG C, and the processing time is 30-40min.
Preferably, in step (3), the time for being passed through Ar gas is 25-30min, and heat preservation is poured after standing 20-30min.
The device have the advantages that are as follows:
Compared with prior art, the present invention provides a kind of Al-Si-Cu-Mg aluminium alloy for adding Zn and its casting solid solution are tough
Chemical industry skill, this is simple for process, is the common material of plant produced using raw material, and the aluminum alloy heat treatment process is only
Carry out double_stage guide processing i.e. may make cast Al-9Si-1Cu-0.4Mg aluminium alloy reach compared with high-tensile, it is higher bend
Intensity, the combined effect compared with high-elongation are taken, the overall performance of product is improved, can be used for the high-end dress such as automobile, aerospace
Standby thin-wall complicated casting, the technique reduce the prolonged ag(e)ing process of heat treatment compared with ordinary heat treatment, when solid solution
Between also shortened to 5 hours, greatly reduce the time of heat treatment, reduce the energy consumption of heat treatment process, improve production effect
Rate reduces costs.
Detailed description of the invention
Fig. 1 is solution heat treatment curve graph of the present invention.
Specific embodiment
Embodiment:
The cast aluminium alloy gold raw materials and weight percent of the present embodiment are as follows:
Al-20Si:45.00 %, Al-40Cu:2.50 %, the Mg:0.40% that purity is 99.99%, the Zn that purity is 99.96%:
0.60%, Al-10Sr:0.10%, Al-5Ti-1B:0.10%, the Al:51.3 % that purity is 99.97%,
The present embodiment specific embodiment are as follows:
(1) above-mentioned Al-20Si, Al-40Cu, Mg, Zn, Al-10Sr, Al-5Ti-1B, Al are weighed, is added in resistance furnace,
The pre-heat treatment 30-40min at 100-200 DEG C reduces the generation of stomata, pin hole in fusion process to remove raw material steam；
(2) the furnace melting of graphite crucible melting resistance, temperature of aluminum liquid after fusing is added in Al, Al-20Si, Al-40Cu after preheating
Control at 730-740 DEG C, then to molten aluminum carry out 20 min refining and remove Slag treatment, later adjust temperature to 720-730 DEG C,
Mg, Zn is added, adjustment temperature carries out the refining of 20 min again and remove Slag treatment at 730-740 DEG C after melting completely；
(3) it goes after the completion of Slag treatment that Al-10Sr, Al-5Ti-1B is added, being passed through 25-30min purity by ceramic degasification stick is
99.99% Ar gas, after degasification, adjustment temperature of aluminum liquid is 710 ± 5 DEG C, and heat preservation is poured after standing 20-30min；
(4) casting after being poured carries out double_stage guide processing, and level-one solid solution is to keep 2h, second level under the conditions of 500 ± 5 DEG C of temperature
Solid solution is to be warming up to 520 ± 5 DEG C of holding 3h after level-one solid solution, is then carried out at quenching in 60-70 DEG C of warm water to casting
Reason obtains the Al-9Si-1Cu-0.4Mg casting solid solution aluminium alloy of addition Zn.
The tensile strength for the aluminium alloy that the present embodiment is cast reaches 315Mpa, and yield strength reaches 225Mpa, and elongation percentage is
8.9%。
The raw material that the present invention uses are the raw material that factory normally produces and uses, the Al-9Si-1Cu- cast
0.4Mg aluminium alloy, heat treatment process, which only carries out double_stage guide processing, can reach the combination of higher tensile strength and elongation percentage,
Compared with aging treatment process after common heat treatment solid solution, reduce prolonged ag(e)ing process, solution time has also shortened to 5
A hour greatly reduces the time of heat treatment process, reduces the energy consumption of heat treatment process, improves production efficiency, reduces
Cost.
Claims (6)
1. a kind of Al-Si-Cu-Mg aluminium alloy for adding Zn, it is characterised in that: cast the aluminium alloy raw materials and weight
Percentage are as follows:
Al-20Si:42.5%-47.5%,
Al-40Cu:2.38%-2.63%,
The Mg:0.35%-0.45% that purity is 99.99%,
The Zn:0.55%-0.65% that purity is 99.96%,
Al-10Sr:0.1%,
Al-5Ti-1B:0.1%,
Surplus is the Al that purity is 99.97%.
2. a kind of Al-Si-Cu-Mg aluminium alloy for adding Zn according to claim 1, it is characterised in that: the aluminium alloy
Tensile strength be more than or equal to 300Mpa, yield strength be more than or equal to 220Mpa, elongation percentage be more than or equal to 7.0%.
3. a kind of Al-Si-Cu-Mg aluminium alloy for adding Zn according to claim 1, it is characterised in that: cast the aluminium
Alloy raw materials and weight percent are as follows:
Al-20Si:45.00 %,
Al-40Cu:2.50 %,
The Mg:0.40% that purity is 99.99%,
The Zn:0.60% that purity is 99.96%,
Al-10Sr:0.1%,
Al-5Ti-1B:0.1%,
The Al:51.3 % that purity is 99.97%,
The tensile strength of the aluminium alloy is more than or equal to 300MPa, and yield strength is more than or equal to 220MPa, and elongation percentage is more than or equal to
7.0%。
4. the casting of aluminium alloy described in claim 1 is dissolved strength-toughening technique, it is characterised in that: the technique comprises the steps of:
(1) Al-40Cu, 0.35%-0.45% purity for weighing Al-20Si, 2.38%-2.63% of 42.5%-47.5% are 99.99%
Mg, 0.55%-0.65% purity be 99.96% Zn, 0.1% Al-10Sr, 0.1% Al-5Ti-1B, surplus be that purity is
99.97% Al is added in resistance furnace and carries out the pre-heat treatment；
(2) the furnace melting of graphite crucible melting resistance, temperature of aluminum liquid after fusing is added in Al, Al-20Si, Al-40Cu after preheating
Control at 730-740 DEG C, then to molten aluminum carry out 20 min refining and remove Slag treatment, later adjust temperature to 720-730 DEG C,
Mg, Zn is added, adjustment temperature carries out the refining of 20 min again and remove Slag treatment at 730-740 DEG C after melting completely；
(3) it goes after the completion of Slag treatment that Al-10Sr, Al-5Ti-1B is added, the Ar that purity is 99.99% is passed through by ceramic degasification stick
Gas, after degasification, adjustment temperature of aluminum liquid is 710 ± 5 DEG C, and heat preservation is poured after standing；
(4) casting after being poured carries out double_stage guide processing, and level-one solid solution is to keep 2h, second level under the conditions of 500 ± 5 DEG C of temperature
Solid solution is to be warming up to 520 ± 5 DEG C of holding 3h after level-one solid solution, is then carried out at quenching in 60-70 DEG C of warm water to casting
Reason obtains the casting solid solution aluminium alloy of addition Zn.
5. the casting of aluminium alloy is dissolved strength-toughening technique according to claim 4, it is characterised in that: in step (1), at preheating
The temperature of reason is 100-200 DEG C, and the processing time is 30-40min.
6. the casting of aluminium alloy is dissolved strength-toughening technique according to claim 4, it is characterised in that: in step (3), be passed through Ar
The time of gas is 25-30min, and heat preservation is poured after standing 20-30min.
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| CN201811238763.4A CN109161733A (en) | 2018-10-23 | 2018-10-23 | A kind of the Al-Si-Cu-Mg aluminium alloy and its casting solid solution strength-toughening technique of addition Zn |
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| CN201811238763.4A CN109161733A (en) | 2018-10-23 | 2018-10-23 | A kind of the Al-Si-Cu-Mg aluminium alloy and its casting solid solution strength-toughening technique of addition Zn |
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| CN112962001A (en) * | 2021-01-11 | 2021-06-15 | 南昌大学 | Method for preparing graphene reinforced aluminum-based composite material by composite process |
| CN114086038A (en) * | 2021-11-24 | 2022-02-25 | 齐鲁工业大学 | Transition metal element added Al-Si-Cu-Mg series casting alloy material and treatment process thereof |
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Cited By (3)
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| CN110952001A (en) * | 2019-12-19 | 2020-04-03 | 山东泰来铸铝科技有限公司 | High-strength and high-toughness Al-Si-Cu-Mg cast aluminum alloy added with Mn and Zn and heat treatment method thereof |
| CN112962001A (en) * | 2021-01-11 | 2021-06-15 | 南昌大学 | Method for preparing graphene reinforced aluminum-based composite material by composite process |
| CN114086038A (en) * | 2021-11-24 | 2022-02-25 | 齐鲁工业大学 | Transition metal element added Al-Si-Cu-Mg series casting alloy material and treatment process thereof |
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Application publication date: 20190108 |