CN104831102A - Aluminum alloy refinement agent, production method and application thereof - Google Patents
Aluminum alloy refinement agent, production method and application thereof Download PDFInfo
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Abstract
The invention provides an aluminum alloy refinement agent, and a method for processing an aluminum alloy material by using the aluminum alloy refinement agent. The aluminum alloy refinement agent has good quality stability, can increase the mechanical strength of the aluminium alloy, and can easily reach the technical repeatability and stability.
Description
Technical field
The present invention relates to melting and the manufacture field of aluminium alloy, relate more specifically to a kind of aluminium alloy fining agent, its preparation method and the purposes in refining aluminum alloy.
Background technology
Aluminium alloy is a most widely used class non-ferrous metal structured material in industry, widely applies in Aeronautics and Astronautics, automobile, machinofacture, boats and ships and chemical industry.Little (ρ=the 2.7g/cm of density of fine aluminium
3), be approximately 1/3 of iron, fusing point low (660 DEG C), aluminium is face-centred cubic structure, therefore has very high plasticity (δ: 32 ~ 40%, ψ: 70 ~ 90%), and be easy to processing, can be made into various section bar, sheet material, corrosion resistance is good; But the intensity of fine aluminium is very low, as-annealed condition σ b value is about 8kgf/mm
2, therefore should not structured material be made.By long-term production practice and scientific experiment, people are gradually to add alloying element and to use the methods such as thermal treatment to carry out reinforced aluminum, and this just obtains a series of aluminium alloy.The alloy adding the formation of certain element can also have higher intensity while the advantages such as maintenance fine aluminium light weight, and σ b value can reach 24 ~ 60kgf/mm respectively
2.Its " specific tenacity " (ratio σ b/ ρ of intensity and proportion) is made to surpass a lot of steel alloy like this, become desirable structured material, be widely used in the aspects such as machinofacture, Transport Machinery, power machine and aircraft industry, the fuselage, covering, pneumatic plant etc. of aircraft are normal with aluminium alloy manufacture, to alleviate deadweight.Adopt aluminium alloy to replace the welding of steel plate materials, structural weight can alleviate more than 50%.Aluminium alloy density is low, but strength ratio is higher, close to or exceed high-quality steel, plasticity is good, can be processed into various section bar, has excellent electroconductibility, thermal conductivity and corrosion stability, industrially widely uses, and usage quantity is only second to steel.Some aluminium alloys can adopt thermal treatment to obtain good mechanical property, physicals and corrosion resistance.
The widespread use of aluminium alloy in the departments such as traffic, chemical industry, machinery, electric power, electronics, instrument, building, agricultural and light industry, has higher requirement to the structure and properties of aluminium alloy.And the equiaxed grain structure that founding goes out fine uniform is the key point obtaining premium properties.Grain refining becomes the important means of innovation metallurgy and Novel aluminum alloy material development.
Flourish along with automotive industry, aluminum-alloy wheel is due to its generous, perfect heat-dissipating handsome in appearance, light fuel-efficient, advantage, the widespread use in basic, normal, high end automobile at present such as expansion and contraction snappiness is good, good rigidly, guarantor's circle are good.In current international automobile industry, A356 aluminium alloy is often adopted to be cast as wheel.A356 aluminium alloy is Al-Si-Mg system alloy, the mass content of Si is the mass content of 6.5%-7.5%, Mg is 0.25%-0.35%, due to Si mass content >6%, belong to hypoeutectic structure, so need to adopt fine degenerate process to improve the structure and properties of alloy.
Automotive wheel to the general requirement of the mechanical property of A356 aluminium alloy is: tensile strength Rm>220MPa, yield strength Rp0.2>180MPa, elongation As>7%.The mechanical property of the A356 of traditional interpolation Al-5Ti-1B master alloy is Rm:270-280MPa, Rp0.2:220-230MPa, As:8%-9%.
The fining agent of commercial is Al-5Ti-1B, alterant is Al-10Sr, after fine degenerate, the intensity of alloy and plasticity improve, but the TiAl3 phase that may occur thick needle-like in Al-5Ti-1B, and easily assemble agglomerating as the TiB2 phase of nucleating center, in order to avoid the shortcoming of Al-5Ti-1B refinement, obtain the aluminum-alloy wheel that mechanical property is more excellent, need the method improving fining modifier and refinement.
Summary of the invention
Therefore, the object of this invention is to provide a kind of aluminium alloy fining agent, and the aluminium alloy that the method for refining aluminum alloy and its refinement obtain, thus obtain the more excellent aluminium alloy of mechanical property, to meet the demand in the fields such as wheel.In order to realize above goal of the invention, the invention provides following technical scheme:
In one aspect of the invention, the Co that described aluminium alloy fining agent comprises Zr that atomic percent is 50-60%, atomic percent is 20-25%, atomic percent are the Mg of 14-18% and atomic percent is the Ag of 5-7%; Preferably, described aluminium alloy fining agent is non-crystaline amorphous metal.
In the present invention one is preferred, the Ag that described aluminium alloy fining agent is 5-7% by the Mg that atomic percent is the Zr of 50-60%, atomic percent is the Co of 20-25%, atomic percent is 14-18% and atomic percent forms.
In the present invention one is preferred, the Ag that described aluminium alloy fining agent is 5-7% by the Mg that atomic percent is the Zr of 53-58%, atomic percent is the Co of 21-24%, atomic percent is 17-18% and atomic percent forms.
In the present invention one is preferred, Zr, atomic percent that described aluminium alloy fining agent is 56% by atomic percent be 22% Co, atomic percent be 16% Mg and atomic percent be 6% Ag form.
In the present invention one is preferred, Zr, atomic percent that described aluminium alloy fining agent is 58% by atomic percent be 21% Co, atomic percent be 16% Mg and atomic percent be 5% Ag form.
In the present invention one is preferred, Zr, atomic percent that described aluminium alloy fining agent is 54% by atomic percent be 25% Co, atomic percent be 14% Mg and atomic percent be 7% Ag form.
In the present invention one is preferred, described aluminium alloy fining agent is prepared as follows: the simple substance of the various metals described in any one of claim 1-6 proportionally adds in arc-melting furnace by (1), and carries out melting under atmosphere of inert gases; And (2) use copper mould that the melt described in step (1) is prepared into foundry goods; Preferably, use the method for melt spinning that melt is prepared into foundry goods in described step (2).
In another aspect of the present invention, provide a kind of method of refining aluminum alloy, described method comprises step: aluminium alloy melts by (1) under 770-800 degree Celsius; (2) according to the aluminium alloy fining agent that the 0.2-0.6wt.% of aluminium alloy stock quality adds the aluminium alloy fining agent according to any one of claim 1-6 or prepares in accordance with the method for claim 7, and 5-120 minute is incubated under 770-800 degree Celsius.
In the present invention one is preferred, described method also comprises step (3) after step (2): stir and take out crucible after 3-5 minute and be put in 3-10 minute in air, when molten aluminium temperature is 700-750 DEG C, slagging-off, being watered by molten aluminium casts from cast iron die, forms bar after natural air cooling; Preferably, described cast iron die is preheated to 170-230 DEG C; Further preferably, 200 DEG C are preheated to.
In the present invention one is preferred, described method also comprises step (4) after step (3): bar is incubated 2 hours in the heat treatment furnace of 540 DEG C, in the hot water of 80 DEG C, carry out quench treatment; Preferably, described method also comprises step (5) after step (4): after quench treatment terminates, and is transferred to by bar in the heat treatment furnace of 150 DEG C and is incubated 12 hours, and cool in atmosphere.
In the present invention one is preferred, described pending aluminium alloy is A356 aluminium alloy.
In the present invention one is preferred, in step (2), add aluminium alloy fining agent according to the 0.4wt.% of aluminium alloy stock quality.
In the present invention one is preferred, in step (2), insulation 10-30 minute; Preferably, 10 minutes are incubated.
In another aspect of the present invention, provide the aluminium alloy obtained according to previously described method refinement.
In another aspect of the present invention, provide according to the purposes of previously described aluminium alloy in casting wheel.
In other aspects of the present invention, additionally provide following technical scheme:
The processing method of a kind of zirconium-cobalt-aluminium-Yin amorphous ribbon master alloy thinning processing A356 aluminium alloy, it is characterized in that: comprise the following steps: step one, prepare zirconium-cobalt-aluminium-Yin amorphous ribbon: calculate according to amount of substance mark, Zr is 40-60 part, Co is 20-25 part, Mg is 14-18 part, and Ag is that 5-7 part prepares zirconium-cobalt-silicon-Yin amorphous ribbon; Step 2, melting refining: with commercial A356 aluminium alloy for alloy raw material, zirconium-cobalt-Yin the amorphous ribbon obtained with step one is for master alloy, adopt crucible electrical resistance furnace melting, smelting temperature is 770-800 DEG C, under this smelting temperature, put into alloy raw material insulation 30-50 minute, slagging-off is stirred to alloy raw material and melts completely, is 0.5% add refining agent according to the mass percent of alloy raw material, pass into Ar gas and carry out degasification in 3-30 minute, be incubated after 5-10 minute and remove the gred; Be that 0.2-0.6% adds the obtained zirconium-cobalt-aluminium-Yin amorphous ribbon of step one according to the mass percent of alloy raw material, at 770-800 DEG C of insulation 5-120 minute; Step 3, gravitational casting: after insulation terminates, slagging-off, stirs and takes out crucible after 3-5 minute and be put in 3-10 minute in air, when molten aluminium temperature is 700-750 DEG C, slagging-off, waters molten aluminium in the cast iron die casting from and be preheated to 200 DEG C, forms bar after natural air cooling; Step 4, thermal treatment: the bar in cast iron die is heat-treated, comprises, solution treatment: bar is incubated 2 hours in the heat treatment furnace of 540 DEG C, in the hot water of 80 DEG C, carry out quench treatment; Ageing treatment: after quench treatment terminates, is transferred to bar in the heat treatment furnace of 150 DEG C and is incubated 12 hours, air cooling.
Advantageous Effects of the present invention comprises: the method can the crystal grain of refining aluminum alloy (such as, A356 aluminium alloy), thus obtain the more excellent aluminium alloy of mechanical property, to meet the requirement of aluminum-alloy wheel material.The method increase intensity and the plasticity of aluminium alloy, this aluminium alloy (such as, A356 aluminium alloy) is very suitable for manufacturing automotive wheel.
Embodiment
Tell about detailed content of the present invention by the following examples, provide embodiment to be convenience in order to understand, is never restriction the present invention.
embodiment 1
A processing method for Zr-Co-Mg-Ag amorphous ribbon master alloy thinning processing aluminium alloy, its step is as follows:
Step one, prepare aluminium alloy fining agent:
Fining agent A: calculate according to amount of substance, 56 parts of Zr, 22 parts of Co, 16 parts of Mg and 6 part Ag prepare Zr
56co
22ag
6amorphous ribbon master alloy.
Fining agent B: calculate according to amount of substance, 54 parts of Zr, 25 parts of Co, 16 parts of Mg and 7 part Ag prepare Zr
54co
25ag
7amorphous ribbon master alloy.
Fining agent C: calculate according to amount of substance, 58 parts of Zr, 21 parts of Co, 14 parts of Mg and 5 part Ag prepare Zr
58co
21ag
5amorphous ribbon master alloy.
DSC and XRD method is used to characterize above fining agent.Result shows, above fining agent A-C is single amorphous phase.
The method of refining is proportionally added in arc-melting furnace by the simple substance of described various metals, and carries out melting under atmosphere of inert gases; Silica tube put into by mother alloy melting obtained, adopt induction heating that mother alloy is melted, maintain the temperature at the above 50-150 DEG C of fusing point, with rare gas element (Ar gas), the mother alloy of melting is ejected on the copper roller of high speed rotating (rotating speed is 3000-4000r/min), throws away ribbon foundry goods.
In DSC mentioned above tests, the DSC instrument used is be STD1600 synchronous solving purchased from the model of Mettler Toledo company, test method and [S.L.Zhu, X.M.Wang, F.X.Qin, A.Inoue, Materials Science and Engineering A 459 (2007) 233 – 237] disclosed in method identical.
In XRD mentioned above tests, the XRD instrument that the DSC instrument used is is D8 purchased from the model of Bruker company, test method and [Ye Han, Fanli Kong, Chuntao Chang, Shengli Zhu, Akhisa Inoue, El-Sayed Shalaan, Fahad Al-Marzouki, Journal of Materials Research 30 (2015) 547-555] disclosed in method identical.
Step 2, melting refining:
Aluminium alloy stock is:
Aluminium alloy 1: commercial A356 aluminium alloy, purchased from Binzhou Meng Weilianxin novel material company limited.
If no special instructions, the aluminium alloy used in other embodiments takes identical name with the aluminium alloy used in the present embodiment.
Fining agent is the amorphous ribbon master alloy of the A-C group that step one prepares, adopt crucible electrical resistance furnace melting, smelting temperature is 790 DEG C, put into the Al alloy thermal insulation 35 minutes of test group 1-4 at such a temperature respectively, slagging-off stirring guarantees that aluminium alloy melts completely, is 0.5% add refining agent, passes into Ar gas and carry out degasification in 3 minutes according to the mass percent of aluminium alloy, being incubated after 5 minutes and removing the gred, is the Zr of 0.2% according to the mass percent of aluminium alloy
56co
22mg
16ag
6amorphous ribbon master alloy, 790 DEG C of insulations 10 minutes.
Step 3, gravitational casting: after insulation terminates, slagging-off is taken out crucible and is put in air, and when molten aluminium temperature is 720 DEG C, slagging-off, being watered by molten aluminium in the cast iron die casting from and be preheated to 200 DEG C, is bar after natural air cooling.
Step 4, the bar in cast iron die is carried out T6 thermal treatment (namely carrying out ageing treatment after solution treatment).Wherein, solution treatment is that bar is incubated 2 hours in the heat treatment furnace of 540 DEG C, in the hot water of 80 DEG C, carry out quench treatment.Ageing treatment is after quench treatment terminates, and is transferred to by bar in the heat treatment furnace of 150 DEG C and is incubated 12 hours, air cooling.
Carry out Refinement operation according to the processing parameter shown in table 1, in table, unspecified parameter as mentioned before and be all identical in each test group.
Table 1: the processing condition of thinning processing aluminium alloy in embodiment 1
The sample utilizing the step 3 of Olympus metaloscope GX51 to each test group above to obtain carries out metallographic detection, result shows to use fining agent A of the present invention to carry out the aluminium alloy of Refinement operation compared with the aluminium alloy after refinement in prior art, tensile strength is higher, yield strength is higher, and maintains desirable elongation level.Particularly, the tensile strength of A2-1 is the highest, reaches 301MPa; The yield strength Rp0.2 of B1-1 is the highest, reaches 242MPa; The unit elongation of A1-1 is the highest, and As reaches 9.63%.And the tensile strength of above each group, yield strength and elongation level all reach the general requirement of automotive wheel to the mechanical property of A356 aluminium alloy, namely tensile strength Rm>220MPa, yield strength Rp0.2>180MPa, elongation As>7%.
Olympus metaloscope GX51 is also utilized to carry out metallographic detection to the sample of all the other each test group.Result shows the as-cast structure dendrite fine uniform in above each group, in strip and dendroid distribution, achieve good thinning effect.
Meanwhile, contriver is surprised to find, and the aluminium alloy fining agent in the present embodiment has preferable quality stability, easily reaches technologic repeatability and stability.Therefore the aluminium alloy fining agent in the present embodiment also overcomes the shortcoming of aluminium alloy fining agent of the prior art.
embodiment 2
Use aluminium alloy fining agent to carry out a processing method for thinning processing aluminium alloy, its step is as follows:
Step one, prepare aluminium alloy fining agent (amorphous ribbon master alloy), with embodiment one.
Step 2, melting refining, from the different of step 2 in embodiment one, this step 2 is only that the mass percent adding amorphous ribbon master alloy becomes 0.4% from 0.2%.
Step 3, gravitational casting, with embodiment one.
Step 4, the bar in cast iron die is carried out T6 thermal treatment, with embodiment one.
Carry out Refinement operation according to the processing parameter shown in table 2, in table, unspecified parameter as mentioned before and be all identical in each test group.
Table 2: the processing condition of thinning processing aluminium alloy
Respectively metallographic detection is carried out to the sample that step 3 in above each group and step 4 obtain.Result shows, the further refinement of as-cast structure crystal grain, and tensile strength, yield strength and elongation all have growth.Such as, wherein the tensile strength of A1-2 is 276.29MPa, and yield strength is 231.61MPa, and elongation is 9.31%.
And the tensile strength of above each group, yield strength and elongation level all reach the general requirement of automotive wheel to the mechanical property of A356 aluminium alloy, namely tensile strength Rm>220MPa, yield strength Rp0.2>180MPa, elongation As>7%.
Olympus metaloscope GX51 is also utilized to carry out metallographic detection to the sample of all the other each test group.Result shows the as-cast structure dendrite fine uniform in above each group, in strip and dendroid distribution, achieve good thinning effect.
Meanwhile, contriver is surprised to find, and the aluminium alloy fining agent in the present embodiment has preferable quality stability, easily reaches technologic repeatability and stability.Therefore the aluminium alloy fining agent in the present embodiment also overcomes the shortcoming of aluminium alloy fining agent of the prior art.
embodiment 3
A processing method for aluminium alloy fining agent thinning processing aluminium alloy, its step is as follows:
Step one, prepare aluminium alloy fining agent, with embodiment one.
Step 2, melting refining, the soaking time at 790 DEG C after this step 2 and step 2 in embodiment one different are only to add aluminium alloy fining agent changed 30 minutes into by 10 minutes.
Step 3, gravitational casting, with embodiment one.
Step 4, the bar in cast iron die is carried out T6 thermal treatment, with embodiment one.
Carry out Refinement operation according to the processing parameter shown in table 3, in table, unspecified parameter as mentioned before and be all identical in each test group.
Table 3: the processing condition of thinning processing aluminium alloy
| Test group number | Aluminium alloy fining agent | Aluminium alloy | Soaking time/minute |
| A1-3 | Fining agent A | Aluminium alloy 1 | 30 |
| B1-3 | Fining agent B | Aluminium alloy 1 | 30 |
| C1-3 | Fining agent C | Aluminium alloy 1 | 30 |
Respectively metallographic detection is carried out to the sample that step 3 in above each group and step 4 obtain.Result shows, the further refinement of as-cast structure crystal grain, and tensile strength, yield strength and elongation all have growth.
And the tensile strength of above each group, yield strength and elongation level all reach the general requirement of automotive wheel to the mechanical property of A356 aluminium alloy, namely tensile strength Rm>220MPa, yield strength Rp0.2>180MPa, elongation As>7%.
Olympus metaloscope GX51 is also utilized to carry out metallographic detection to the sample of all the other each test group.Result shows the as-cast structure dendrite fine uniform in above each group, in strip and dendroid distribution, achieve good thinning effect.Here the crystal of as-cast structure is comparatively thick compared with embodiment 1-2.
Meanwhile, contriver finds, the aluminium alloy fining agent in the present embodiment has preferable quality stability, easily reaches technologic repeatability and stability.Therefore the aluminium alloy fining agent in the present embodiment also overcomes the shortcoming of aluminium alloy fining agent of the prior art.
embodiment 4
A processing method for aluminium alloy fining agent thinning processing aluminium alloy, its step is as follows:
Step one, prepare aluminium alloy fining agent, with embodiment one.
Step 2, melting refining, the soaking time at 790 DEG C after this step 2 and step 2 in embodiment one different are only to add aluminium alloy fining agent changed 45 minutes into by 10 minutes.
Step 3, gravitational casting, with embodiment one.
Step 4, the bar in cast iron die is carried out T6 thermal treatment, with embodiment one.
Carry out Refinement operation according to the processing parameter shown in table 4, in table, unspecified parameter as mentioned before and be all identical in each test group.
Table 4: the processing condition of thinning processing aluminium alloy
| Test group number | Aluminium alloy fining agent | Aluminium alloy | Soaking time/minute |
| A1-4 | Fining agent A | Aluminium alloy 1 | 45 |
| B1-4 | Fining agent B | Aluminium alloy 1 | 45 |
[0085]
| C1-4 | Fining agent C | Aluminium alloy 1 | 45 |
Test the sample of each test group, result shows, and alligatoring appears in crystal grain, but tensile strength, yield strength and elongation are all than there being obvious rising before thinning processing.
embodiment 5
Use aluminium alloy fining agent to carry out a processing method for thinning processing aluminium alloy, its step is as follows:
Step one, prepare aluminium alloy fining agent, with embodiment one.
Step 2, melting refining, the soaking time at 790 DEG C after this step 2 and step 2 in embodiment one different are only to add aluminium alloy fining agent changed 60 minutes into by 10 minutes.
Step 3, gravitational casting, with embodiment one.
Step 4, the bar in cast iron die is carried out T6 thermal treatment, with embodiment one.
Carry out Refinement operation according to the processing parameter shown in table 5, in table, unspecified parameter as mentioned before and be all identical in each test group.
Table 5: the processing condition of thinning processing aluminium alloy
| Test group number | Aluminium alloy fining agent | Aluminium alloy | Soaking time/minute |
| A1-5 | Fining agent A | Aluminium alloy 1 | 60 |
| B1-5 | Fining agent B | Aluminium alloy 1 | 60 |
| C1-5 | Fining agent C | Aluminium alloy 1 | 60 |
Carry out metallographic to the sample of each test group to detect and stretching mechanical property testing.Result shows, and crystal grain becomes large further, and eutectic structure occurs assembling the large phenomenon of change.But tensile strength and yield strength still increase than before process.
embodiment 6
Use aluminium alloy fining agent to carry out a processing method for thinning processing aluminium alloy, its step is as follows:
Step one, prepare aluminium alloy fining agent, with embodiment one.
Step 2, melting refining, from the different of step 2 in embodiment one, this step 2 is only that the mass percent adding aluminium alloy fining agent becomes 0.6% from 0.2%.
Step 3, gravitational casting, with embodiment one.
Step 4, the bar in cast iron die is carried out T6 thermal treatment, with embodiment one.
Carry out Refinement operation according to the processing parameter shown in table 6, in table, unspecified parameter as mentioned before and be all identical in each test group.
Table 6: the processing condition of thinning processing aluminium alloy
By above-described embodiment, invention has been described, but above concrete case study on implementation is only part Experiment, is not for limiting practical range of the present invention.The person skilled of this area is according to the present invention or when not departing from present inventive concept, the equivalent deformation carried out and relevant modifications, these are all within protection of the present invention.
Claims (8)
1. an aluminium alloy fining agent, is characterized in that, the Co that described aluminium alloy fining agent comprises Zr that atomic percent is 50-60%, atomic percent is 20-25%, atomic percent are the Mg of 14-18% and atomic percent is the Ag of 5-7%; Preferably, described aluminium alloy fining agent is non-crystaline amorphous metal.
2. aluminium alloy fining agent according to claim 1, is characterized in that, described aluminium alloy fining agent is selected from:
(1) Ag that the aluminium alloy fining agent described in is 5-7% by the Mg that atomic percent is the Zr of 50-60%, atomic percent is the Co of 20-25%, atomic percent is 14-18% and atomic percent forms;
(2) Ag that the aluminium alloy fining agent described in is 5-7% by the Mg that atomic percent is the Zr of 53-58%, atomic percent is the Co of 21-24%, atomic percent is 17-18% and atomic percent forms;
(3) Zr, atomic percent that the aluminium alloy fining agent described in is 56% by atomic percent be 22% Co, atomic percent be 16% Mg and atomic percent be 6% Ag form;
(4) Zr, atomic percent that the aluminium alloy fining agent described in is 58% by atomic percent be 21% Co, atomic percent be 16% Mg and atomic percent be 5% Ag form; And
(5) Zr, atomic percent that the aluminium alloy fining agent described in is 54% by atomic percent be 25% Co, atomic percent be 14% Mg and atomic percent be 7% Ag form.
3. the aluminium alloy fining agent described in claim 1 or 2, is characterized in that, described aluminium alloy fining agent is prepared as follows:
(1) simple substance of the various metals described in claim 1 or 2 is proportionally added in arc-melting furnace, and carry out melting under atmosphere of inert gases; And
(2) use copper mould that the melt described in step (1) is prepared into foundry goods;
Preferably, use the method for melt spinning that melt is prepared into foundry goods in described step (2).
4. a method for refining aluminum alloy, is characterized in that, described method comprises step:
(1) aluminium alloy is melted under 770-800 degree Celsius;
(2) add the aluminium alloy fining agent according to any one of claim 1-3 according to the 0.2-0.6wt.% of aluminium alloy stock quality, and be incubated 5-120 minute under 770-800 degree Celsius.
5. method according to claim 4, is characterized in that, described method comprise in following operation one or more:
(1) after step (2), step (3) is also comprised: stir and take out crucible after 3-5 minute and be put in 3-10 minute in air, when molten aluminium temperature is 700-750 DEG C, slagging-off, waters molten aluminium and casts from cast iron die, form bar after natural air cooling; Preferably, described cast iron die is preheated to 170-230 DEG C; Further preferably, 200 DEG C are preheated to;
(2) after step (3), step (4) is also comprised: bar is incubated 2 hours in the heat treatment furnace of 540 DEG C, in the hot water of 80 DEG C, carry out quench treatment; Preferably, described method also comprises step (5) after step (4): after quench treatment terminates, and is transferred to by bar in the heat treatment furnace of 150 DEG C and is incubated 12 hours, and cool in atmosphere;
(3) in step (2), aluminium alloy fining agent is added according to the 0.4wt.% of aluminium alloy stock quality; And
(4) insulation 10-30 minute in step (2), is preferably incubated 10 minutes.
6. the method described in claim 4 or 5, is characterized in that, described pending aluminium alloy is A356 aluminium alloy.
7. according to the aluminium alloy that the method refinement according to any one of claim 1-6 obtains.
8. the aluminium alloy obtained according to the method refinement according to any one of claim 1-6 or the purposes of aluminium alloy according to claim 7 in casting wheel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106498198A (en) * | 2016-10-25 | 2017-03-15 | 河北工业大学 | A kind of composite refining alterant for improving aluminum alloy heat stability and its preparation method and application |
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Application publication date: 20150812 |