CN106435295A - Rare earth element erbium-doped cast aluminum alloy and preparation method therefor - Google Patents
Rare earth element erbium-doped cast aluminum alloy and preparation method therefor Download PDFInfo
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- CN106435295A CN106435295A CN201610973258.9A CN201610973258A CN106435295A CN 106435295 A CN106435295 A CN 106435295A CN 201610973258 A CN201610973258 A CN 201610973258A CN 106435295 A CN106435295 A CN 106435295A
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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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
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Abstract
The invention belongs to the technical field of aluminum alloys and relates to a rare earth element erbium-doped cast aluminum alloy and a preparation method therefor. The preparation method provided by the invention specifically comprises the following steps of: 1) preparing an erbium-aluminum alloy pre-treatment material; 2) performing solution treatment; and 3) performing double aging treatment. By adding the rare earth element erbium (0.1-0.7%) into the cast aluminum alloy, the microstructure of the alloy is improved. Meanwhile, the mechanical property of the alloy is improved by virtue of double aging treatment, so that the tensile strength of the aluminum-erbium alloy reaches 330MPa above, and therefore, the application of the alloy in the field of automobile industry is expanded.
Description
Technical field
The invention belongs to technical field of aluminum alloy technology, it is related to a kind of cast aluminium alloy gold of rare earth doped element erbium (particularly
A356 aluminium alloy) and preparation method thereof.
Background technology
A356 aluminium alloy is a kind of typically heat-treatable strengthened hypoeutectic Al-Si system cast aluminium alloy gold, because it has
Casting fluidity is good, air-tightness is good, the advantages of shrinkage factor is little and machining property is excellent, and is widely used in processing automobile system
The parts such as dynamic pump cylinder, automotive transmission, belt wheel, automotive hub.In recent years, with the fast development of Domestic Automotive Industry, pass
The mechanical property of the A356 aluminium alloy castings of system can not meet use requirement, needs badly by adding suitable alloying element and adopting
Put forward heavy alloyed mechanical property with rational handling process, widen its range of application.
Content of the invention
For above-mentioned situation, the present invention is intended to provide a kind of cast aluminium alloy gold of rare earth doped element erbium and its preparation side
Method.By adding rare earth element er (Er), micronization processes are carried out to cast aluminium alloy gold, improve alloy structure, then again through twin-stage
Ageing Treatment, improves intensity and the plasticity of cast aluminium alloy gold.
Specifically, the present invention adopts the following technical scheme that：
A kind of preparation method of the cast aluminium alloy gold of rare earth doped element erbium, it comprises the following steps：
1) prepare Al-Er alloy material previously treated：Cast aluminium alloy gold is placed in smelting equipment, is heated to 760～780 DEG C
And keeping temperature is constant；Until completely melted, add aluminum erbium intermediate alloy in aluminum melt, until the weight of erbium accounts for gross weight
0.1%～0.7%；Aluminum erbium intermediate alloy is pressed in aluminum melt and stirs, so that erbium is evenly distributed；Treat that aluminum erbium intermediate alloy is whole
After fusing, melt temperature is down to 730 DEG C～740 DEG C and keeping temperature is constant, add slagging-off degasifier, carry out at slagging-off degasification
Reason；After slagging-off degasification finishes, melt temperature is down to 700 DEG C～720 DEG C and keeping temperature is constant, after standing 5～10 minutes,
It is poured in the metal die of preheating, prepared Al-Er alloy material previously treated；
2) solution treatment：Solution treatment is carried out to Al-Er alloy material previously treated, protects first under the conditions of 535～545 DEG C
Temperature 3～5 hours, then in 60～80 DEG C of quenching-in waters 3～5 minutes, controls quenching shift time to be less than 15 seconds, obtains solid solution
The Al-Er alloy processing；
3) two-stage time effect is processed：The Al-Er alloy of solution treatment is incubated 1～1.5 hour under the conditions of 115～125 DEG C,
Carry out Pre-aging treatment, then under the conditions of 175～185 DEG C, be incubated 0.5～1 hour, carry out whole Ageing Treatment, you can mixed
The cast aluminium alloy gold of miscellaneous rare earth element er.
In above-mentioned preparation method, described cast aluminium alloy gold is A356 aluminium alloy.
In above-mentioned preparation method, described smelting equipment is smelting furnace.
In above-mentioned preparation method, described aluminum erbium intermediate alloy is Al-5Er alloy or Al-10Er alloy.
In above-mentioned preparation method, described slagging-off degasifier is DSG slagging-off degasifier.
In above-mentioned preparation method, described press-in to be completed using bell jar.
In above-mentioned preparation method, described stirring to be completed using graphite rod.
In above-mentioned preparation method, the preheating temperature of described metal die is 200 DEG C.
In the preferred technical solution of the present invention, add aluminum erbium intermediate alloy in aluminum melt, until the weight of erbium accounts for always
The 0.2%～0.5% of weight.
In the more preferably technical scheme of the present invention, add aluminum erbium intermediate alloy in aluminum melt, until the weight of erbium accounts for
The 0.5% of gross weight.
A kind of cast aluminium alloy gold of the rare earth doped element erbium being obtained by above-mentioned preparation method.
Compared with prior art, following beneficial effect is had using the present invention of technique scheme：By adding rare earth
Element erbium, shortens the secondary dendrite size of cast aluminium alloy gold, the microstructure form of alloy and size be improved significantly.Tool
For body, when the incorporation of rare earth erbium increases to 0.5% by 0, the average grain size of α-Al is reduced to 45 μm by 130 μm,
The average-size of silicon grain is reduced to 5.7 μm by 22.7 μm, and eutectic structure is gradually evolved into point-like and fiber fines shape, rare earth erbium
There is obvious thinning effect.Meanwhile, the mechanical property of alloy is improve so that Al-Er alloy by two-stage time effect heat treatment
Tensile strength reaches more than 330MPa, has widened application in auto industry field for this alloy.
Brief description
Fig. 1 is the microstructure photo of the A356 aluminium alloy of undoped p rare earth Er.
Fig. 2 is the microstructure photo of the A356 aluminium alloy of doping 0.2% rare earth Er.
Fig. 3 is the microstructure photo of the A356 aluminium alloy of doping 0.4% rare earth Er.
Fig. 4 is the microstructure photo of the A356 aluminium alloy of doping 0.5% rare earth Er.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme is described further.Unless otherwise saying
Bright, instrument used in the following example, material, reagent etc. all can be obtained by routine business means.
Embodiment 1：The A356 aluminium alloy of preparation undoped p Er.
First A356 aluminium alloy is incubated 4 hours under the conditions of 540 DEG C, then in 60 DEG C of warm quenching-in waters 5 minutes, controls
Quenching shift time is less than 15 seconds.
It is incubated 1 hour through the alloy of above-mentioned process under the conditions of 120 DEG C, carries out Pre-aging treatment, then in 180 DEG C of bars
It is incubated 0.5 hour under part, carry out whole Ageing Treatment, you can obtain the A356 aluminium alloy of undoped p Er.
Embodiment 2：The A356 aluminium alloy of preparation doping 0.2%Er.
A356 aluminium alloy is placed in smelting furnace, is heated slowly to 760 DEG C and keeping temperature is constant.Until completely melted,
Add Al-5Er alloy in aluminum melt, until the weight of erbium accounts for the 0.2% of gross weight.Intermediate alloy is pressed into by aluminum using bell jar
In liquation, and it is continuously agitated using graphite rod, so that erbium is evenly distributed.After intermediate alloy all melts, melt temperature is dropped
To 730 DEG C and keeping temperature constant, add DSG slagging-off degasifier, carry out remove the gred degassing processing.After slagging-off degasification finishes, will
Melt temperature is down to 700 DEG C and keeping temperature is constant, and standing, after 5 minutes, is poured in the metal die being preheated to 200 DEG C, system
Obtain Al-Er alloy material previously treated.
Solution treatment is carried out to above-mentioned Al-Er alloy material previously treated, is incubated 4 hours first under the conditions of 540 DEG C, then
In 60 DEG C of warm quenching-in waters 5 minutes, control quenching shift time to be less than 15 seconds, obtain the Al-Er alloy of solution treatment.
The Al-Er alloy of above-mentioned solution treatment is incubated 1 hour under the conditions of 120 DEG C, carries out Pre-aging treatment；Then exist
It is incubated 0.5 hour under the conditions of 180 DEG C, carries out whole Ageing Treatment, you can obtain the A356 aluminium alloy of 0.2%Er that adulterates.After testing,
The tensile strength of this alloy reaches more than 330MPa, is significantly better than the A356 alloy institute being obtained using traditional T6 Technology for Heating Processing
The tensile strength of the 280MPa having.
Embodiment 3：The A356 aluminium alloy of preparation doping 0.4%Er.
A356 aluminium alloy is placed in smelting furnace, is heated slowly to 780 DEG C and keeping temperature is constant.Until completely melted,
Add Al-5Er alloy in aluminum melt, until the weight of erbium accounts for the 0.4% of gross weight.Intermediate alloy is pressed into by aluminum using bell jar
In liquation, and it is continuously agitated using graphite rod, so that erbium is evenly distributed.After intermediate alloy all melts, melt temperature is dropped
To 740 DEG C and keeping temperature constant, add DSG slagging-off degasifier, carry out remove the gred degassing processing.After slagging-off degasification finishes, will
Melt temperature is down to 720 DEG C and keeping temperature is constant, and standing, after 10 minutes, is poured in the metal die being preheated to 200 DEG C, system
Obtain Al-Er alloy material previously treated.
Solution treatment is carried out to above-mentioned Al-Er alloy material previously treated, is incubated 5 hours first under the conditions of 540 DEG C, then
In 80 DEG C of warm quenching-in waters 3 minutes, control quenching shift time to be less than 15 seconds, obtain the Al-Er alloy of solution treatment.
The Al-Er alloy of above-mentioned solution treatment is incubated 1 hour under the conditions of 120 DEG C, carries out Pre-aging treatment；Then exist
It is incubated 0.5 hour under the conditions of 180 DEG C, carries out whole Ageing Treatment, you can obtain the A356 aluminium alloy of 0.4%Er that adulterates.After testing,
The tensile strength of this alloy reaches more than 330MPa, is significantly better than the A356 alloy institute being obtained using traditional T6 Technology for Heating Processing
The tensile strength of the 280MPa having.
Embodiment 4：The A356 aluminium alloy of preparation doping 0.5%Er.
A356 aluminium alloy is placed in smelting furnace, is heated slowly to 770 DEG C and keeping temperature is constant.Until completely melted,
It is added to Al-10Er alloy, until the weight of erbium accounts for the 0.5% of gross weight.Using bell jar, intermediate alloy press-in aluminum is melted
In liquid, and it is continuously agitated using graphite rod, so that erbium is evenly distributed.After intermediate alloy all melts, melt temperature is down to
730 DEG C and keeping temperature constant, add DSG slagging-off degasifier, carry out remove the gred degassing processing.After slagging-off degasification finishes, will melt
Temperature is down to 710 DEG C and keeping temperature is constant, and standing, after 8 minutes, is poured in the metal die being preheated to 200 DEG C, is obtained
Al-Er alloy material previously treated.
Solution treatment is carried out to above-mentioned Al-Er alloy material previously treated, is incubated 4.5 hours first under the conditions of 540 DEG C, so
Afterwards in 70 DEG C of warm quenching-in waters 4 minutes, control quenching shift time to be less than 15 seconds, obtain the Al-Er alloy of solution treatment.
The Al-Er alloy of above-mentioned solution treatment is incubated 1 hour under the conditions of 120 DEG C, carries out Pre-aging treatment；Then exist
It is incubated 1 hour under the conditions of 180 DEG C, carries out whole Ageing Treatment, you can obtain the A356 aluminium alloy of 0.5%Er that adulterates.After testing, should
The tensile strength of alloy reaches more than 330MPa, is significantly better than the A356 alloy using traditional T6 Technology for Heating Processing is obtained and is had
The tensile strength of some 280MPa.
Experimental example 1：Microstructure observation's experiment of A356 aluminium alloy.
Separately sampled in the cast aluminium alloy material of rare earth doped element erbium obtaining from embodiment 1～4, through polishing,
After polishing, corrosion, observe the microstructure of alloy under an optical microscope, its result is as shown in figures 1-4.
It can be seen that with the increase of rare earth erbium incorporation, in A356 aluminium alloy, the size of Eutectic Silicon in Al-Si Cast Alloys gradually subtracts
Little and tend to uniform, silicon grain average-size is reduced to 5.7 μm by 22.7 μm, and eutectic structure is gradually evolved into point-like and tiny fibre
Dimension shape, the evolution of microstructure is conducive to the mechanical property of A356 aluminium alloy to improve.
Claims (10)
1. a kind of preparation method of the cast aluminium alloy gold of rare earth doped element erbium, it comprises the following steps：
1) prepare Al-Er alloy material previously treated：Cast aluminium alloy gold is placed in smelting equipment, is heated to 760～780 DEG C and protects
Hold temperature constant；Until completely melted, add aluminum erbium intermediate alloy in aluminum melt, until the weight of erbium accounts for gross weight
0.1%～0.7%；Aluminum erbium intermediate alloy is pressed in aluminum melt and stirs, so that erbium is evenly distributed；Treat that aluminum erbium intermediate alloy is whole
After fusing, melt temperature is down to 730 DEG C～740 DEG C and keeping temperature is constant, add slagging-off degasifier, carry out at slagging-off degasification
Reason；After slagging-off degasification finishes, melt temperature is down to 700 DEG C～720 DEG C and keeping temperature is constant, after standing 5～10min,
It is poured in the metal die of preheating, prepared Al-Er alloy material previously treated；
2) solution treatment：Solution treatment is carried out to Al-Er alloy material previously treated, first under the conditions of 535～545 DEG C insulation 3～
5 hours, then in 60～80 DEG C of quenching-in waters 3～5 minutes, control quenching shift time to be less than 15 seconds, obtain solution treatment
Al-Er alloy；
3) two-stage time effect is processed：The Al-Er alloy of solution treatment is incubated 1～1.5 hour under the conditions of 115～125 DEG C, carries out
Pre-aging treatment, is then incubated 0.5～1 hour under the conditions of 175～185 DEG C, carries out whole Ageing Treatment, you can obtain adulterating dilute
The cast aluminium alloy gold of earth elements erbium.
2. preparation method according to claim 1 it is characterised in that：
Described cast aluminium alloy gold is A356 aluminium alloy.
3. preparation method according to claim 1 it is characterised in that：
Described smelting equipment is smelting furnace.
4. preparation method according to claim 1 it is characterised in that：
Described aluminum erbium intermediate alloy is Al-5Er alloy or Al-10Er alloy.
5. preparation method according to claim 1 it is characterised in that：
Described slagging-off degasifier is DSG slagging-off degasifier.
6. preparation method according to claim 1 it is characterised in that：
Described press-in to be completed using bell jar.
7. preparation method according to claim 1 it is characterised in that：
Described stirring to be completed using graphite rod.
8. preparation method according to claim 1 it is characterised in that：
The preheating temperature of described metal die is 200 DEG C.
9. preparation method according to claim 1 it is characterised in that：
The weight of described erbium accounts for the 0.2%～0.5% of gross weight.
10. a kind of cast aluminium alloy gold of rare earth doped element erbium, it is by system according to any one of claim 1 to 9
Preparation Method is obtained.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108342626A (en) * | 2018-05-18 | 2018-07-31 | 东北轻合金有限责任公司 | One kind ocean engineering containing erbium and goods stock aluminium alloy and its manufacturing method of plate thereof |
| CN109695011A (en) * | 2018-06-20 | 2019-04-30 | 蔚来汽车有限公司 | A kind of heat treatment method of aluminum alloy part |
| CN114438376A (en) * | 2022-02-17 | 2022-05-06 | 江西理工大学 | Aluminum-cerium-erbium heat-resistant cast aluminum alloy and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108342626A (en) * | 2018-05-18 | 2018-07-31 | 东北轻合金有限责任公司 | One kind ocean engineering containing erbium and goods stock aluminium alloy and its manufacturing method of plate thereof |
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| CN114438376A (en) * | 2022-02-17 | 2022-05-06 | 江西理工大学 | Aluminum-cerium-erbium heat-resistant cast aluminum alloy and preparation method thereof |
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Application publication date: 20170222 |