CN105525150A - Solid renewable aluminum alloy and preparation method thereof - Google Patents
Solid renewable aluminum alloy and preparation method thereof Download PDFInfo
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Abstract
The invention discloses solid renewable aluminum alloy and a preparation method thereof. The tensile strength of the solid renewable aluminum alloy is 160-280 MPa, the yield strength of the solid renewable aluminum alloy is 70-120 MPa, and the ductility of the solid renewable aluminum alloy is 15%-30%. The preparation method of the solid renewable aluminum alloy includes the steps that aluminum alloy scraps are placed in a crusher to be crushed into fine grains or fine scraps; an appropriate amount of the aluminum ally fine grains or fine scraps are placed into a steel die cavity, and then the fine grains or fine scraps are pressed to a precast block through die pressing; the pressed precast block is placed in an induction coil to be subjected to induction heating; and the heated precast block is placed in a die to be subjected to hot extrusion, and therefore an aluminum alloy profile with various cross section shapes and sizes is prepared. The solid renewable aluminum alloy and the preparation method thereof have the remarkable characteristics that the renewable aluminum alloy material is excellent in mechanics property, physical property and the like, and the preparation method is low in cost and energy consumption.
Description
Technical field
The invention belongs to metal working technical area, particularly relate to a kind of secondary aluminium alloy and preparation method thereof.
Background technology
Aluminium alloy is owing to having higher specific tenacity, the advantages such as good ductility, electroconductibility, thermal conductivity and erosion resistance, be widely used in Aeronautics and Astronautics, automobile, machinofacture, boats and ships and chemical industry, be the metallic substance that usage quantity is maximum after iron and steel, have very large supporting role to the national economic development.1.94% of the bauxite resource reserves Jin Zhan world of China, but 40% of the aluminium alloy consumption Que Zhan world, increase with the speed of average annual 7.2%, to the primary aluminum consumption of 20l1 China more than 1,800 ten thousand tons simultaneously.The energy that the smelting process for production process consumption of primary aluminium alloy is a large amount of.Therefore how efficiently, reasonably make to utilize limited aluminium alloy resource, become the problem that people pay special attention to for a long time.A large amount of turning scrap can be produced in the process of producing various product with aluminium alloy, if by these turning scrap recyclings, not only can greatly economize on resources and the energy, and significantly can reduce environmental pollution, the production cost of Al-alloy products can also be reduced simultaneously, there is the Social benefit and economic benefit of highly significant.Traditional aluminium alloy turning scrap reclaiming process, mainly by the mode of remelting, so not only destroys the original microstructure of material, and it is high to consume a large amount of energy consumption, simultaneously also because oxidational losses quite a few, the rate of recovery is low, and manufacturing cost increases greatly.Solid-state secondary aluminium alloy turning scrap has boundless market outlook and competitive power.This is because compared with traditional remelting method, it does not need just can directly be considered to be worth doing by aluminium alloy by fusing be converted into high-compactness, high-performance and primary aluminium alloy property and compare favourably or more excellent section bar or near-net-shape component.According to data Fogagnolo, J.B., E.M.Ruiz-Navas, etal (2003) JMaterProcTech143:792 and Gronostajski, J., H.Marciniak, etal. (2000) .JMaterProcTech106:34 shows: the remelting aluminium alloy rate of recovery only has 54.1%, energy consumption is but up to 17.5kJ/g, and the solid-state secondary aluminium alloy rate of recovery is up to 95.2%, and energy consumption is but low to moderate 5.6kJ/g.In recent years along with the shortage day by day of global aluminum alloy resource, and the degree of concern of people to the energy and environment raises day by day, and the cry of people to solid-state secondary aluminium alloy is also more and more higher.
The people such as RyoichiChiba (RyoichiChiba, TamonNakamura, MitsutoshiKuroda, JournalofMaterialsProcessingTechnology211 (2011) 1878 – 1887) by carrying out cold extrusion and then cold rolling technique has prepared regeneration Al-7%Si-0.4%Mg alloy material to Al-7%Si-0.4%Mg alloy bits, the tensile yield strength of this material is at about 180MPa, tensile strength reaches about 230MPa, but elongation is but less than 2%, stretching elongation low like this causes material to apply in the industry.The major cause of low elongation is because temperature is lower in extruding and the operation of rolling, and aluminium alloy bits do not realize good metallurgical binding.The people such as TakashiTAKAHASHI (TakashiTAKAHASHI, YujiKUME, MakotoKOBASHIandNaoyukiKANETAKE, JournalofJapanInstituteofLightMetals, Vol.59, No.7 (2009), pp.354 – 358) successfully 6063 aluminium alloy bits are converted into the good block materials of performance by high pressure torsion technique, the stretching elongation of 6063 aluminium alloys reclaimed by this technique reaches 15%, but because the scantling of this technique to preparation has considerable restraint, be therefore difficult to suitability for industrialized production.The people such as W.Tang (W.Tang, A.P.Reynolds, JournalofMaterialsProcessingTechnology210 (2010) 2231 – 2237) consider to be worth doing as raw material with 2050 aluminium alloy bits and 2195 aluminium alloys, prepared surface quality good 2050 and 2195 aluminium alloy wires by the technique of friction and Extrusion, after thermal treatment, the hardness of material has exceeded 140HV.People (V.G ü ley, A.G ü zel, the A. such as V.G ü ley
n.BenKhalifa, A.E.Tekkaya, W.Z.Misiolek, MaterialsScience & EngineeringA574 (2013) 163 – 175) utilize porthole die to carry out hot extrusion to 6060 aluminium alloy bits, thus prepared 6060 aluminium alloy twice-laid stufves, the tensile yield strength of this material is 50MPa, and tensile strength is 132MPa, and unit elongation is 25.4%.Due to this porthole die complicated structure, the cost of manufacture of mould will be caused greatly to improve.
Therefore, those skilled in the art is devoted to develop the preparation method of the solid-state secondary aluminium alloy of the excellent combination properties such as a kind of mechanical property, physicals and low cost thereof, less energy-consumption.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide solid-state secondary aluminium alloy and simple process, the preparation method with low cost of the excellent combination properties such as a kind of tensile strength, yield strength, unit elongation performance.
For achieving the above object, the invention provides a kind of solid-state secondary aluminium alloy, the tensile strength of described solid-state secondary aluminium alloy is 160 ~ 280MPa, and yield strength is 70 ~ 120MPa, and unit elongation is 15% ~ 30%.
Present invention also offers a kind of preparation method of above-mentioned solid-state secondary aluminium alloy, said method comprising the steps of:
A. aluminium alloy bits are put into crusher broken, aluminium alloy bits become aluminium alloy particulate or fines;
B. get appropriate aluminium alloy particulate or fines puts into steel die chamber, then the steel die that aluminium alloy particulate or fines are housed is placed on press, utilizes the pressure of press that aluminium alloy particulate or fines are pressed into prefabricated section;
C. prefabricated section is put into ruhmkorff coil and carry out induction heating;
D. the prefabricated section heated is put into mould and carry out hot extrusion.
In better embodiment of the present invention, in described step a, described aluminium alloy bits are A356 aluminium alloy bits or 6063 aluminium alloys bits; The time of aluminium alloy bits fragmentation is 1 ~ 30min; Aluminium alloy particulate or fines such as to be respectively at shaft-like particulate or the sheet fines, and particle diameter or sheet footpath are less than 10mm.
In better embodiment of the present invention, in described step b, the pressure of compressor operation is 100 ~ 1000MPa, and the dwell time is 1 ~ 10 minute; The relative density of prefabricated section is within the scope of 75-98%.
In better embodiment of the present invention, in described step c, the temperature range of described induction heating is 200 ~ 500 DEG C, and the induction heating time is 1 ~ 60 minute, and induction heating carries out under inert atmosphere protection.
In another better embodiment of the present invention, in described steps d, the preheating temperature of the mould that hot extrusion uses is 200 ~ 500 DEG C, and hot extrusion pressure is 100 ~ 1000MPa, and hot extrusion is carried out at inert atmosphere protection; The extrusion ratio of described hot extrusion is within the scope of 5:1 ~ 100:1; The cross section of described mould is circular or other shapes.
The present invention effectively utilizes aluminium alloy particulate in heating, rapid diffusion under pressurization and Plastic Deformation Conditions is welded and is realized the quick densifying of prefabricated section and the particulate interface fast transition to crystal boundary and phase boundary, thus obtains mechanical property, physicals and other performance secondary aluminium alloy material identical or more excellent with the primary aluminium alloy material of corresponding same chemical composition.
The present invention has following advantage and effect relative to prior art:
1) solid-state secondary aluminium alloy of the present invention all has excellent performance in tensile strength, yield strength and unit elongation etc.;
2) advantage that solid-state secondary aluminium alloy preparation method simple process of the present invention, the rate of recovery are high, with low cost.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete steps and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the solid-state regeneration A356 aluminium alloy bars photo that a preferred embodiment of the present invention obtains;
Fig. 2 is the solid-state regeneration A356 aluminium alloy cross-sectional metallographic photo that a preferred embodiment of the present invention obtains;
Fig. 3 is the solid-state regeneration A356 aluminium alloy room temperature tensile curve that a preferred embodiment of the present invention obtains;
Fig. 4 is the solid-state regeneration 6063 aluminium alloy room temperature tensile curve that a preferred embodiment of the present invention obtains.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1
The preparation of solid-state regeneration A356 aluminium alloy
A356 aluminium alloy bits are put into the broken 10min of crusher, becomes the fines that mean particle size is less than 10mm; Get appropriate A356 aluminium alloy particulate and put into punching block, then by mold pressing, A356 aluminium alloy particulate is pressed into the prefabricated section that relative density is 95%, the pressure acted on prefabricated section is 600MPa, and the dwell time is 1 minute; The prefabricated section suppressed is put into ruhmkorff coil heat, Heating temperature is 400 DEG C, and soaking time is 2 minutes, and induction heating carries out under inert atmosphere protection; The prefabricated section heated is put into mould and carries out hot extrusion; solid-state regeneration A356 rods and bars of aluminium alloy can be prepared; extruding uses mold preheating temperature to be 400 DEG C; extrusion ratio is 9:1; pressure is 600MPa; hot extrusion is carried out at inert atmosphere protection, and hot extrusion grinding tool cross section is circular, squeezes out bar-shaped solid-state regeneration A356 aluminium alloy.
Scanning electron microscope result shows, and the Eutectic Silicon in Al-Si Cast Alloys particle after hot extrusion in A356 aluminium alloy there occurs fracture and refinement after extruding, and particle size is less than 5 microns, and is uniformly distributed along the direction of extrusion, and is uniformly distributed along the direction of extrusion.
Stretch test result shows, and the A356 aluminum alloy sample yield strength of solid-state regeneration is 89MPa, and tensile strength is 169MPa, and unit elongation is 20.5%.
Embodiment 2
The preparation of solid-state regeneration 6063 aluminium alloy
6063 aluminium alloy bits are put into the broken 10min of crusher, becomes the sheet fines that sheet footpath is less than 10mm; Get appropriate 6063 aluminium alloy fines and put into steel die cavity, then by mold pressing, aluminium alloy fines is pressed into the prefabricated section that relative density is 80%, the pressure acted on prefabricated section is 600MPa, and the dwell time is 1 minute; The prefabricated section suppressed is put into ruhmkorff coil heat, Heating temperature is 500 DEG C, and soaking time is 2 minutes, and induction heating carries out under inert atmosphere protection; The prefabricated section heated is put into mould and carries out hot extrusion, can prepare solid-state regeneration 6063 rods and bars of aluminium alloy, the mold preheating temperature that extruding uses is 500 DEG C, and extrusion ratio is 9:1, and pressure is 600MPa, and hot extrusion is carried out at inert atmosphere protection.
Stretch test result shows, and 6063 aluminum alloy sample yield strengths of solid-state regeneration are 89MPa, and tensile strength is 169MPa, and unit elongation is 20.5%.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technician in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. a solid-state secondary aluminium alloy, is characterized in that, the tensile strength of described solid-state secondary aluminium alloy is 160 ~ 280MPa, and yield strength is 70 ~ 120MPa, and unit elongation is 15% ~ 30%.
2. a preparation method for solid-state secondary aluminium alloy as claimed in claim 1, is characterized in that, said method comprising the steps of:
A. aluminium alloy bits are put into crusher broken, aluminium alloy bits become aluminium alloy particulate or fines;
B. get appropriate aluminium alloy particulate or fines puts into steel die chamber, then the steel die that aluminium alloy particulate or fines are housed is placed on press, utilizes the pressure of press that aluminium alloy particulate or fines are pressed into prefabricated section;
C. prefabricated section is put into ruhmkorff coil and carry out induction heating;
D. the prefabricated section heated is put into mould and carry out hot extrusion.
3. a solid-state secondary aluminium alloy preparation method as claimed in claim 2, is characterized in that, in described step a, described aluminium alloy bits are A356 aluminium alloy bits or 6063 aluminium alloys bits; The time of aluminium alloy bits fragmentation is 1 ~ 30min.
4. a solid-state secondary aluminium alloy preparation method as claimed in claim 3, is characterized in that, in described step a, aluminium alloy particulate or fines such as to be respectively at shaft-like particulate or the sheet fines, and median size or sheet footpath are less than 10mm.
5. as right wants the solid-state secondary aluminium alloy preparation method as described in 2, it is characterized in that, in described step b, the pressure of compressor operation is 100 ~ 1000MPa, and the dwell time is 1 ~ 10 minute.
6. a solid-state secondary aluminium alloy preparation method as claimed in claim 5, is characterized in that, in described step b, the relative density of prefabricated section is within the scope of 75-98%.
7. a solid-state secondary aluminium alloy preparation method as claimed in claim 2, is characterized in that, in described step c, the temperature range of described induction heating is 200 ~ 500 DEG C, and the induction heating time is 1 ~ 60 minute, and induction heating carries out under inert atmosphere protection.
8. a solid-state secondary aluminium alloy preparation method as claimed in claim 2; it is characterized in that, in described steps d, the preheating temperature of the mould that hot extrusion uses is 200 ~ 500 DEG C; hot extrusion pressure is 100 ~ 1000MPa, and hot extrusion is carried out under inert atmosphere protection.
9. a solid-state secondary aluminium alloy preparation method as claimed in claim 8, is characterized in that, in described steps d, the extrusion ratio of described hot extrusion is within the scope of 5:1 ~ 100:1.
10. a solid-state secondary aluminium alloy preparation method as claimed in claim 9, is characterized in that, in described steps d, the cross section of described mould is circular or other shapes.
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Cited By (6)
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| CN110153343A (en) * | 2019-06-05 | 2019-08-23 | 浙江蔚华汽车科技有限公司 | A kind of novel aluminum alloy formed solid method |
| CN110343886A (en) * | 2018-04-08 | 2019-10-18 | 南京理工大学 | A kind of preparation method of multiple grain scale reinforced aluminium alloy material |
| CN110343885A (en) * | 2018-04-08 | 2019-10-18 | 南京理工大学 | A kind of preparation method of multiple dimensioned precipitation strength isomery aluminium alloy |
| CN114737077A (en) * | 2022-03-24 | 2022-07-12 | 东北大学 | Preparation method of solid regenerated aluminum alloy by using aluminum alloy ring-pull can |
| CN115233021A (en) * | 2022-08-22 | 2022-10-25 | 日铭电脑配件(上海)有限公司 | Preparation method of regenerated aluminum alloy and prepared aluminum alloy |
| CN115287486A (en) * | 2022-08-22 | 2022-11-04 | 日铭电脑配件(上海)有限公司 | Preparation method of mixed aluminum scrap solid regenerated wrought aluminum alloy |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110343886A (en) * | 2018-04-08 | 2019-10-18 | 南京理工大学 | A kind of preparation method of multiple grain scale reinforced aluminium alloy material |
| CN110343885A (en) * | 2018-04-08 | 2019-10-18 | 南京理工大学 | A kind of preparation method of multiple dimensioned precipitation strength isomery aluminium alloy |
| CN110343885B (en) * | 2018-04-08 | 2021-10-08 | 南京理工大学 | Preparation method of multi-scale precipitation strengthening heterogeneous aluminum alloy |
| CN110153343A (en) * | 2019-06-05 | 2019-08-23 | 浙江蔚华汽车科技有限公司 | A kind of novel aluminum alloy formed solid method |
| CN114737077A (en) * | 2022-03-24 | 2022-07-12 | 东北大学 | Preparation method of solid regenerated aluminum alloy by using aluminum alloy ring-pull can |
| CN115233021A (en) * | 2022-08-22 | 2022-10-25 | 日铭电脑配件(上海)有限公司 | Preparation method of regenerated aluminum alloy and prepared aluminum alloy |
| CN115287486A (en) * | 2022-08-22 | 2022-11-04 | 日铭电脑配件(上海)有限公司 | Preparation method of mixed aluminum scrap solid regenerated wrought aluminum alloy |
| CN115233021B (en) * | 2022-08-22 | 2023-08-11 | 日铭电脑配件(上海)有限公司 | Preparation method of regenerated aluminum alloy and prepared aluminum alloy |
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