CN104831196A - Aluminum alloy refinement agent and preparation method thereof - Google Patents

Aluminum alloy refinement agent and preparation method thereof Download PDF

Info

Publication number
CN104831196A
CN104831196A CN201510165506.2A CN201510165506A CN104831196A CN 104831196 A CN104831196 A CN 104831196A CN 201510165506 A CN201510165506 A CN 201510165506A CN 104831196 A CN104831196 A CN 104831196A
Authority
CN
China
Prior art keywords
aluminium alloy
atomic percent
fining agent
alloy
aluminium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510165506.2A
Other languages
Chinese (zh)
Inventor
王永宁
朱志华
刘春海
李昌海
阿拉腾
王立生
张振栋
苏云高
赵乃勤
朱胜利
何春年
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin University
Citic Dicastal Co Ltd
Original Assignee
Tianjin University
Citic Dicastal Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tianjin University, Citic Dicastal Co Ltd filed Critical Tianjin University
Priority to CN201510165506.2A priority Critical patent/CN104831196A/en
Publication of CN104831196A publication Critical patent/CN104831196A/en
Pending legal-status Critical Current

Links

Abstract

The invention provides an aluminum alloy refinement agent, which comprises the following components by atom percentage: 50-60% of Zr, 20-25% of Co, 14-18% of Al and 5-7% of Ag. Preferably, the aluminum alloy refinement agent is an amorphous alloy. The aluminum alloy refinement agent has the beneficial effect that A356 aluminum alloy crystal grains can be refined, so that A356 aluminum alloy with more excellent mechanical property can be obtained, and the requirements of wheel material of the aluminum alloy can be satisfied. The aluminum alloy refinement agent can increase the intensity and plasticity of the alloy, and the A356 aluminum alloy is very suitable for producing automobile wheels.

Description

A kind of aluminium alloy fining agent and preparation method thereof
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.Meanwhile, the fining agent of Al-Ti-B adds in aluminium liquid, promotes the TiB of forming core 2easy generation is assembled and reduces thinning effect, which has limited the application industrially of this fining agent, and easily causes aluminium liquid to need to return processing even to scrap, cause great waste.
The fining agent of Al-Ti-C type can also be used.But Al-Ti-C fining agent is difficult to produce, and quality is also stable not, is difficult to industrially large-scale application.
In order to overcome above technical problem, in the urgent need to a kind of novel aluminium alloy fining agent, improve the mechanical property of aluminium alloy.
Summary of the invention
Therefore, the object of this invention is to provide a kind of aluminium alloy fining agent for refining aluminum alloy, 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, provide a kind of aluminium alloy fining agent, it is characterized in that, described aluminium alloy fining agent comprises Zr that atomic percent is 50-60%, Al that Co that atomic percent is 20-25%, atomic percent are 14-18% and atomic percent be the Ag of 5-7%; Preferably, described aluminium alloy fining agent is non-crystaline amorphous metal.
Of the present invention one preferred in, the Ag that described aluminium alloy fining agent is 5-7% by the Al 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.
Of the present invention one preferred in, the Ag that described aluminium alloy fining agent is 5-7% by the Al 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.
Of the present invention one preferred in, Zr, atomic percent that described aluminium alloy fining agent is 56% by atomic percent be 22% Co, atomic percent be 16% Al and atomic percent be 6% Ag form.
Of the present invention one preferred in, Zr, atomic percent that described aluminium alloy fining agent is 58% by atomic percent be 21% Co, atomic percent be 16% Al and atomic percent be 5% Ag form.
Of the present invention one preferred in, Zr, atomic percent that described aluminium alloy fining agent is 54% by atomic percent be 25% Co, atomic percent be 14% Al and atomic percent be 7% Ag form.
Of the present invention one preferred in, described aluminium alloy fining agent is prepared as follows:
(1) simple substance of previously described various metal is proportionally added in arc-melting furnace, and carry out melting under atmosphere of inert gases, obtain mother alloy;
(2) mother alloy that melting obtains is put into silica tube, use copper mold casting or single roller to revolve the method for quenching and the melt described in step (1) is prepared into cylindric or ribbon foundry goods;
Preferably, use single roller to revolve the method for quenching in described step (2) and melt is prepared into ribbon foundry goods.
In another aspect of the present invention, provide the method preparing previously described aluminium alloy fining agent, it is characterized in that described method comprises step:
(1) simple substance of previously described various metal is proportionally added in arc-melting furnace, and carry out melting under atmosphere of inert gases; And
(2) use copper mold casting or single roller to revolve the melt quenched described in step (1) and be prepared into cylindric or ribbon foundry goods;
Preferably, use single roller to revolve the method for quenching in described step (2) and melt is prepared into ribbon foundry goods.
In the present invention, when describing " aluminium alloy ", the aluminium alloy that " Al-Mg-Si " is preferably is shown.On the basis of specification sheets of the present invention and embodiment, those skilled in the art can judge, the aluminium alloy in this area all can use aluminium alloy fining agent of the present invention to carry out thinning processing.Term of the present invention " aluminium alloy " can be A356 aluminium alloy.
In other aspects of the present invention, described aluminium alloy fining agent is zirconium-cobalt-aluminium-Yin amorphous ribbon.
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: be 40%-60% according to the atomic percent of Zr, the atomic percent of Co is 20%-25%, the atomic percent of Al is the atomic percent of 14%-18%, Ag is that 5%-7% prepares zirconium-cobalt-aluminium-Yin amorphous ribbon; Step 2, melting refining: with commercial A356 aluminium alloy for alloy raw material, zirconium-cobalt-aluminium-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 crystal grain of refinement A356 aluminium alloy, thus obtains the more excellent A356 aluminium alloy of mechanical property, to meet the requirement of aluminum-alloy wheel material.This fining agent improves intensity and the plasticity of aluminium alloy, and this A356 aluminium alloy is very suitable for manufacturing automotive wheel.
Accompanying drawing explanation
Below, describe embodiment of the present invention in detail by reference to the accompanying drawings, wherein:
Fig. 1 is the test group 1A-1 in embodiment of the present invention 1-5, 1A-2, 1A-3, 1A-4 and 1A-5, also in A356 aluminium alloy, namely add the as-cast metallographic structure figure of the sample of zirconium-cobalt-aluminium-Yin amorphous ribbon master alloy, wherein, the as-cast metallographic structure figure of a 1A-1 sample that () is embodiment 1, the as-cast metallographic structure figure of b 1A-2 sample that () is embodiment 2, the as-cast metallographic structure figure of c 1A-3 sample that () is embodiment 3, the as-cast metallographic structure figure of d 1A-4 sample that () is embodiment 4, the as-cast metallographic structure figure of e 1A-5 sample that () is embodiment 5.
Fig. 2 is the test group 1A-1 of embodiment of the present invention 1-5, 1A-2, 1A-3, 1A-4 and 1A-5, also in A356 aluminium alloy, namely add the as-heat-treated condition metallographic structure figure of zirconium-cobalt-aluminium-Yin amorphous ribbon master alloy, wherein, the as-heat-treated condition metallographic structure figure of a 1A-1 sample that () is embodiment 1, the as-heat-treated condition metallographic structure figure of b 1A-2 sample that () is embodiment 2, the as-heat-treated condition metallographic structure figure of c 1A-3 sample that () is embodiment 3, the as-heat-treated condition metallographic structure figure of d 1A-4 sample that () is embodiment 4, the as-heat-treated condition metallographic structure figure of e 1A-5 sample that () is embodiment 5.
Fig. 3 is test group 1A-1,1A-2,1A-3,1A-4 and 1A-5 of embodiment of the present invention 1-5, in A356 aluminium alloy, also namely add the mechanical property figure of zirconium-cobalt-aluminium-Yin amorphous ribbon master alloy, and wherein, (Fig. 3 is a) tensile strength; (Fig. 3 b) is yield strength; (Fig. 3 c) is elongation.
Fig. 4 is the Zr that the present invention adds 56co 22al 16ag 6the DSC of amorphous ribbon (fining agent A) and XRD figure, wherein, (a) is DSC figure, and (b) is XRD figure.
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-Al-Ag amorphous ribbon master alloy thinning processing aluminium alloy, its step is as follows:
Step one, prepare aluminium alloy fining agent:
The atomic percent of fining agent A: the atomic percent being 56%, Co according to the atomic percent of Zr to be the atomic percent of 22%, Al be 16%, Ag is 6% prepare Zr 56co 22al 16ag 6amorphous ribbon master alloy.Fig. 4 shows this Zr 56co 22al 16ag 6the DSC figure of amorphous ribbon and XRD figure.Zr is shown in this figure 56co 22al 16ag 6amorphous ribbon is single amorphous phase.
The atomic percent of fining agent B: the atomic percent being 54%, Co according to the atomic percent of Zr to be the atomic percent of 25%, Al be 14%, Ag is 7% prepare Zr 54co 25al 14ag 7amorphous ribbon master alloy.The DSC figure of fining agent B and XRD figure do not show.Scheme as can be seen from its DSC and in XRD figure, in this figure, show Zr 56co 22al 16ag 6amorphous ribbon is single amorphous phase.
The atomic percent of fining agent C: the atomic percent being 58%, Co according to the atomic percent of Zr to be the atomic percent of 21%, Al be 16%, Ag is 5% prepare Zr 58co 21al 16ag 5amorphous ribbon master alloy.The DSC figure of fining agent C and XRD figure do not show.Scheme as can be seen from its DSC and in XRD figure, in this figure, show Zr 56co 22al 16ag 6amorphous ribbon is single amorphous phase.
Above fining agent is amorphous ribbon master alloy.
The method of refining is: proportionally added in arc-melting furnace by the simple substance of described various metals, and carry 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, disclosed in A.Inoue, Materials Science and Engineering A 459 (2007) 233 – 237, method is 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, disclosed in El-Sayed Shalaan, Fahad Al-Marzouki, Journal of MaterialsResearch 30 (2015) 547-555, method is 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 22al 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 test group A1-1 to obtain carries out metallographic detection, result is as shown in (a) in Fig. 1, the sample obtained to step 4 carries out metallographic detection, as shown in (a) in Fig. 2, the omnipotent mechanics machine rate of extension of WDW-20 is utilized to be 0.1mm/ minute, the sample obtained to step 4 carries out stretching mechanical property testing, as shown in (a), (b) and (c) in Fig. 3.As shown in Figure 3, tensile strength is 304.32MPa, and yield strength is 233.56MPa, and elongation is 7.9%.These data show, according to the method for embodiment 1, and 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, and yield strength is higher, and maintains desirable elongation level.
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.Each group of above metallographic detection figure does not show.Meanwhile, the sample of each test group has been carried out to the test of tensile strength, yield strength and elongation.Test-results shows, each mechanical parameter is all significantly improved than before refinement, and can meet aluminium alloy casting wheel for the demand of aluminium alloy, can industrially apply completely.
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
Metallographic detection is carried out, as shown in (b) in Fig. 1 to the Sample A 1-2 that step 3 obtains.The sample obtained to the step 4 of A1-2 carries out metallographic detection, and as shown in (b) in Fig. 2, the sample obtained to step 4 carries out stretching mechanical property testing, as shown in (a), (b) and (c) in Fig. 3.In the A1-0.4 group of embodiment 2, the further refinement of as-cast structure crystal grain, tensile strength is 310.22MPa, and yield strength is 235.27MPa, and elongation is 9.74%.
All the other each samples obtained step 3 carry out similarly metallographic and detect and mechanicl test, and result shows, and thinning effect is than more remarkable before resize ratio and can obtain good mechanical property.
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
Metallographic detection is carried out to the sample that step 3 obtains, as shown in (c) in Fig. 1, the sample obtained to step 4 carries out metallographic detection, as shown in (c) in Fig. 2, the sample obtained to step 4 carries out stretching mechanical property testing, as shown in (a), (b) and (c) in Fig. 3.In the 1A-3 test group of embodiment 3, relative to embodiment 1, as shown in (c) in (c) in Fig. 1 and Fig. 2, grain size change is not obvious, secondary dendrite increasing number, as shown in Figure 3, tensile strength is 284.9MPa, yield strength is 222.03MPa, and elongation is 7.99%.
Also test the sample of other each test group, result shows, and grain size change is not obvious, secondary dendrite increasing number, and tensile strength, yield strength and elongation are all than there being obvious rising before thinning processing.
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
C1-4 Fining agent C Aluminium alloy 1 45
Metallographic detection is carried out to the sample that step 3 obtains, as shown in (d) in Fig. 1, the sample obtained to step 4 carries out metallographic detection, as shown in (d) in Fig. 2, the sample obtained to step 4 carries out stretching mechanical property testing, as shown in (a), (b) and (c) in Fig. 3.As shown in Figure 3, the tensile strength of the sample of the test group A1-4 of embodiment 4 is 278.95MPa, and yield strength is 220.91MPa, and elongation is 6.8%.
Also test the sample of other 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
Metallographic detection is carried out to the sample that step 3 obtains, the result of test group A1-5 is as shown in (e) in Fig. 1, the sample obtained to step 4 carries out metallographic detection, the result of test group A1-5 is as shown in (e) in Fig. 2, the sample obtained to step 4 carries out stretching mechanical property testing, as shown in (a), (b) and (c) in Fig. 3.The tensile strength of the sample of the test group A1-5 of embodiment 5 is 255.42MPa, and yield strength is 208.4MPa, and elongation is 5.11%.
Carried out metallographic to the sample of other each test group to detect and stretching mechanical property testing simultaneously.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
Result shows the as-cast structure dendrite fine uniform in above each group, in strip and dendroid distribution, achieve good thinning effect.Each group of above metallographic detection figure does not show.
Can obtain adding zirconium-cobalt-aluminium-Yin amorphous ribbon master alloy also i.e. fining agent in A356 aluminium alloy by above-described embodiment 1-6 and Fig. 1 to Fig. 3, its thinning effect significantly and can obtain good mechanical property.Wherein, dendrite fine uniform in embodiment 1 as-cast structure, as shown in (a) in Fig. 1, in strip and dendroid distribution, as shown in (a) in Fig. 2, eutectic structure even dispersion after thermal treatment, eutectic silicon glomeration and closely spherical, as shown in Figure 3, tensile strength is 304.32MPa, yield strength is 233.56MPa, and elongation is 7.9%;
The further refinement of embodiment 2 as-cast structure crystal grain, tensile strength is 310.22MPa, and yield strength is 235.27MPa, and elongation is 9.74%.
Embodiment 3 is relative to embodiment 1, and as shown in (c) in (c) in Fig. 1 and Fig. 2, grain size change is not obvious, secondary dendrite increasing number, as shown in Figure 3, tensile strength is 284.9MPa, yield strength is 222.03MPa, and elongation is 7.99%; As shown in (d) and (e) in (d) and (e) in Fig. 1 and Fig. 2,
Embodiment 4 and embodiment 5, crystal grain becomes large further, eutectic structure occurs assembling the large phenomenon of change, as shown in Figure 3, the tensile strength of embodiment 4 is 278.95MPa, and yield strength is 220.91MPa, elongation is 6.8%, the tensile strength of embodiment 5 is 255.42MPa, and yield strength is 208.4MPa, and elongation is 5.11%.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%.Above case study on implementation can be found out, the tensile strength of case study on implementation 1-5 and yield strength all meet the mechanical property requirements of wheel, the elongation of embodiment 1,2,3 is more than 7%, and the elongation of embodiment 4,5, below 7%, does not meet the elongation requirement of aluminum-alloy wheel.Relative to mechanical property Rm:270-280MPa, Rp0.2:220-230MPa, As:8%-9% of the A356 of traditional interpolation Al-5Ti-1B master alloy.Add ZrCoAlAg amorphous ribbon master alloy to be all better than adding traditional Al-5Ti-1B master alloy at Rm, Rp, As of case study on implementation 1,2.Intensity and the plasticity that ZrCoAlAg amorphous ribbon master alloy can improve aluminum alloy automobile wheel is added in this explanation in A356 aluminium alloy.
In summary, in A356 aluminium alloy, add mass percent is that the mechanical property of 0.4% zirconium-cobalt-aluminium-Yin fining agent is better than and adds the mechanical property that mass percent is 0.2% zirconium-cobalt-aluminium-Yin fining agent; Adding the best soaking time after fining agent is 10 minutes, and the prolongation of soaking time thereupon, there is alligatoring in crystal grain, mechanical property reduces gradually.Preparation method of the present invention has following characteristics:
(1) be 0.2% zirconium-cobalt-aluminium-Yin amorphous ribbon fining agent according to the known mass percent that adds of Fig. 1,-Al has certain refining effect mutually; Adding mass percent is 0.4% zirconium-cobalt-aluminium-Yin amorphous ribbon fining agent, and-Al continues refinement mutually; Adding mass percent is the prolongation of 0.2% zirconium-cobalt-aluminium-Yin amorphous ribbon fining agent along with soaking time, and the phenomenon first reducing to increase afterwards appears in grain-size.
(2) comparison diagram 1 and Fig. 2, after thermal treatment, the distribution of common reciever even dispersion more, and from rod-short with subsphaeroidally become spherical shape.
(3) Fig. 3 shows, when within 10 minutes, to add mass percent be 0.4% zirconium-cobalt-aluminium-Yin amorphous ribbon fining agent in insulation, mechanical property is best; When to add mass percent be 0.4% zirconium-cobalt-aluminium-Yin amorphous ribbon fining agent, along with the prolongation mechanical property of soaking time reduces gradually.
(4) zirconium-cobalt-aluminium-Yin amorphous ribbon fining agent of obtaining of melt-spun, adds in A356 aluminium alloy melt and dissolves rapidly, and carries out suitable mechanical stirring and can more be uniformly distributed in melt, thus thinning effect is more obvious.
(5) the A356 aluminium alloy uniform crystal particles after zirconium-cobalt-aluminium-Yin amorphous ribbon fining agent process is tiny, contributes to improving A356 Mechanical Properties of Aluminum Alloys.
By above-mentioned Binding experiment accompanying drawing, 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 Al 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, it is characterized in that, the Ag that described aluminium alloy fining agent is 5-7% by the Al 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.
3. aluminium alloy fining agent according to claim 2, it is characterized in that, the Ag that described aluminium alloy fining agent is 5-7% by the Al 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.
4. aluminium alloy fining agent according to claim 3, is characterized in that, Zr, atomic percent that described aluminium alloy fining agent is 56% by atomic percent be 22% Co, atomic percent be 16% Al and atomic percent be 6% Ag form.
5. aluminium alloy fining agent according to claim 3, is characterized in that, Zr, atomic percent that described aluminium alloy fining agent is 58% by atomic percent be 21% Co, atomic percent be 16% Al and atomic percent be 5% Ag form.
6. aluminium alloy fining agent according to claim 2, is characterized in that, Zr, atomic percent that described aluminium alloy fining agent is 54% by atomic percent be 25% Co, atomic percent be 14% Al and atomic percent be 7% Ag form.
7. the aluminium alloy fining agent according to any one of claim 1-6, is characterized in that, described aluminium alloy fining agent is prepared as follows:
(1) simple substance of the various metals described in any one of claim 1-6 is proportionally added in arc-melting furnace, and carry out melting under atmosphere of inert gases, obtain mother alloy; And
(2) mother alloy that melting obtains is put into silica tube, use copper mold casting or single roller to revolve the method for quenching and the melt described in step (1) is prepared into cylindric or ribbon foundry goods;
Preferably, use single roller to revolve the method for quenching in described step (2) and melt is prepared into ribbon foundry goods.
8. the method for the aluminium alloy fining agent of preparation according to any one of claim 1-6, is characterized in that described method comprises step:
(1) simple substance of the various metals described in any one of claim 1-6 is proportionally added in arc-melting furnace, and carry out melting under atmosphere of inert gases, obtain mother alloy; And
(2) mother alloy that melting obtains is put into silica tube, use copper mold casting or single roller to revolve the method for quenching and the melt described in step (1) is prepared into cylindric or ribbon foundry goods;
Preferably, use single roller to revolve the method for quenching in described step (2) and melt is prepared into ribbon foundry goods.
CN201510165506.2A 2015-04-09 2015-04-09 Aluminum alloy refinement agent and preparation method thereof Pending CN104831196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510165506.2A CN104831196A (en) 2015-04-09 2015-04-09 Aluminum alloy refinement agent and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510165506.2A CN104831196A (en) 2015-04-09 2015-04-09 Aluminum alloy refinement agent and preparation method thereof

Publications (1)

Publication Number Publication Date
CN104831196A true CN104831196A (en) 2015-08-12

Family

ID=53809389

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510165506.2A Pending CN104831196A (en) 2015-04-09 2015-04-09 Aluminum alloy refinement agent and preparation method thereof

Country Status (1)

Country Link
CN (1) CN104831196A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108441659A (en) * 2018-03-31 2018-08-24 安徽优合科技股份有限公司 A kind of smelting technology of high tough die casting A356 aluminium alloys
CN110184503A (en) * 2019-06-27 2019-08-30 朱胜利 A kind of aluminium alloy fining agent and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1171660A (en) * 1997-08-29 1999-03-16 Akihisa Inoue High strength amorphous alloy and its production
JP2006299393A (en) * 2005-04-19 2006-11-02 Yonsei Univ Monophase amorphous alloy superior in ductility
CN102703842A (en) * 2012-06-15 2012-10-03 北京航空航天大学 Zirconium base blocky amorphous/nanocrystalline alloy with antibacterial action and preparation method thereof
CN103060588A (en) * 2013-02-04 2013-04-24 吉林大学 Non-crystalline Zr-based alloy inoculant for casting aluminum alloy and preparation method of non-crystalline Zr-based alloy inoculant
US20130255837A1 (en) * 2012-03-29 2013-10-03 Atakan Peker Zirconium based bulk metallic glasses

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1171660A (en) * 1997-08-29 1999-03-16 Akihisa Inoue High strength amorphous alloy and its production
JP2006299393A (en) * 2005-04-19 2006-11-02 Yonsei Univ Monophase amorphous alloy superior in ductility
US20130255837A1 (en) * 2012-03-29 2013-10-03 Atakan Peker Zirconium based bulk metallic glasses
CN102703842A (en) * 2012-06-15 2012-10-03 北京航空航天大学 Zirconium base blocky amorphous/nanocrystalline alloy with antibacterial action and preparation method thereof
CN103060588A (en) * 2013-02-04 2013-04-24 吉林大学 Non-crystalline Zr-based alloy inoculant for casting aluminum alloy and preparation method of non-crystalline Zr-based alloy inoculant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108441659A (en) * 2018-03-31 2018-08-24 安徽优合科技股份有限公司 A kind of smelting technology of high tough die casting A356 aluminium alloys
CN110184503A (en) * 2019-06-27 2019-08-30 朱胜利 A kind of aluminium alloy fining agent and preparation method thereof

Similar Documents

Publication Publication Date Title
CN105088033A (en) Aluminium alloy and preparation method thereof
CN104233018B (en) Reinforced aluminum alloy and preparation method thereof
CN101363094B (en) High-strength cast aluminium alloy material
CN106636806B (en) A kind of small grains moderate strength aluminium alloy and the preparation method and application thereof
CN101319287A (en) High-strength cast aluminium alloy material
CN104032195B (en) Efficiently-extrudable low-cost high-performance heat-conducting magnesium alloy and preparation method thereof
US20120037333A1 (en) Method for preparing aluminum-zirconium-titanium-carbon intermediate alloy
US9937554B2 (en) Grain refiner for magnesium and magnesium alloys and method for producing the same
CN101363093B (en) High-strength cast aluminium alloy material
CN104911386A (en) Refinement method of aluminium alloy and refined aluminium alloy
CN104911413A (en) Aluminum silicate composition alloy and production method therof
CN111155007B (en) Preparation method of high-strength 2000 series aluminum alloy based on selective laser melting forming technology
CN103103398B (en) A kind of smelting preparation method of resistant to rust aluminium alloy extrusions
CN110184503A (en) A kind of aluminium alloy fining agent and preparation method thereof
US20160298217A1 (en) Aluminum Alloy Refiner Material and Preparation Method Thereof
CN104831196A (en) Aluminum alloy refinement agent and preparation method thereof
CN109468496A (en) A kind of heat-proof compression casting aluminium alloy and preparation method thereof
WO2003080881A1 (en) Process for the production of al-fe-v-si alloys
WO2014026446A1 (en) Alloy for magnesium and magnesium alloy grain refinement, and preparation method thereof
CN103526087A (en) Aluminum alloy and manufacturing method thereof
CN104831102A (en) Aluminum alloy refinement agent, production method and application thereof
CN104862515A (en) Aluminum alloy refiner and manufacturing method and application of refiner
CN110408823A (en) A kind of high thermal conductivity aluminium alloy and preparation method thereof
US20150041095A1 (en) Aluminum-zirconium-titanium-carbon grain refiner for magnesium and magnesium alloys and method for producing the same
EP2476764B1 (en) Preparation method of al-zr-c master alloy

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20150812

WD01 Invention patent application deemed withdrawn after publication