CN105112740A - Die-cast aluminium alloy material and preparation method thereof - Google Patents
Die-cast aluminium alloy material and preparation method thereof Download PDFInfo
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- CN105112740A CN105112740A CN201510418482.7A CN201510418482A CN105112740A CN 105112740 A CN105112740 A CN 105112740A CN 201510418482 A CN201510418482 A CN 201510418482A CN 105112740 A CN105112740 A CN 105112740A
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Abstract
The invention relates to a die-cast aluminium alloy material. The material is characterized by comprising the following components in percentage by weight: 9.6-12.0% of Si, 1.5-3.5% of Cu, not greater than 0.3% of Mg, not greater than 0.50% of Mn, not greater than 0.30% of Sn, not greater than 0.50% of Ni, not greater than 1.00% of Zn, not greater than 0.8% of Fe, not greater than 0.1% of Pb, not greater than 0.1% of Hg, not greater than 100ppm of Cd, 0.025-0.24% of rare earth element RE, 0.2-0.25% of Zr and the balance Al. The material is good in electrical conductivity, high in strength and elongation, and high in oxidation resistance; and the rare earth element and the zirconium element are added in the aluminium alloy, and harmful elements and gases are removed to purify molten aluminium, and improve the strength, plasticity and pressure resistance of the molten aluminium.
Description
Technical field
The present invention relates to a kind of die-cast aluminum alloy material and preparation method thereof.
Background technology
Aluminium alloy due to its intensity high, lightweight, and have good conductivity (aluminium alloy of various different brands has different performance characteristics), be widely used and obtain good economical effectiveness, as application relates to electrician trade, scatterer processing industry.
In electrician trade, the aluminium alloy conductor of China produces the reform through a few secondary device, technique, and product performance also reach the standard-requireds such as IEC, JEC, and for aerial line.But for various reasons, in current China electric line, the usage quantity of aluminium alloy conductor only accounts for about 7%, and aluminium alloy conductor becomes the main line kind of transmitting line already in the world.Wherein, France uses the most general, and they use aluminium alloy stranded conductor in plains region, then use steel core aluminum alloy stranded wire in mountain area, almost all instead of Aluminium Cable Steel Reinforced at present.In Japan, heat-resisting aluminium alloy is widely used as the principal item of cond aluminium, and the heat-resisting aluminium alloy system of wires that large Utilities Electric Co. of Japan six uses accounts for the built on stilts electric line wire more than 70% of Japan.
In recent years, flourish along with China's power industry, the advantage had aluminium alloy conductor, economical effectiveness have had darker understanding.Electric line aluminium alloy conductor is in powerful ascendant trend, although the current aluminium alloy conductor output of China is little, existing many aluminium alloy conductor products sell to the states such as Singapore, Malaysia, Hong Kong, Pakistan, India, Australia.Closely know, Belgium, South Korea are also had a mind to from China's Imported Aluminium alloy lead wire, and a considerable number of, and domestic North China Old City electric network reconstruction, Three Gorges Projects are all badly in need of the aluminium alloy conductor of a large amount of different brands.Therefore, the inevitable product that will become with line in electric line from now on of the aluminium alloy conductor of high quality, reasonable price.
Because aluminium is soft compared with copper, therefore the aluminium alloy conductor of copper conductor is except reaching the property indices of required conductor as an alternative, and also must possess certain intensity and elongation, also will have certain creep property, resistance of oxidation is strong.Chinese patent application CN102119233A is bright provides a kind of aluminium alloy, aluminum alloy line, aluminium alloy twisted wire, covered electric cable and the bunch with high tenacity and high conductivity, and a kind of method manufacturing aluminum alloy line.Described aluminum alloy line comprises: be more than or equal to 0.005 quality % and be less than or equal to the Fe of 2.2 quality %, and surplus is Al and impurity.This aluminum alloy line can also comprise total amount and be more than or equal to 0.005 quality % and at least one Addition ofelements be selected from Mg, Si, Cu, Zn, Ni, Mn, Ag, Cr and Zr being less than or equal to 1.0 quality %.The electric conductivity of described aluminum alloy line is not less than 58%IACS, and elongation is not less than 10%.Described aluminum alloy line is made by these continuous print steps of casting, rolling, wire drawing and sofening treatment.Carry out sofening treatment to provide excellent toughness (such as, elongation and shock-resistance), thus make when installing bunch, electric wire is alleviated in the crack conditions of portion of terminal vicinity.This aluminium alloy toughness is better, but because of the internal structure problem of aluminium conductor, causes antioxidant property poor.
And in scatterer processing industry, traditional heat sinks mostly is cast iron and steel two kinds of material forms, its heat conductivility is poor, Heavy Weight, volume is large, and cooling surface area is little, radiating efficiency is low, in order to increase heat dissipation capacity, cooling surface area is increased often through the quantity increasing heat-sink unit, so not only need to increase cost, and add the volume of scatterer, cause the space of installation of heat radiator also must increase, castiron spreader surface is coarse in addition, surface treatment difficulty is large, the scatterer solder joint that iron and steel is made is many, loss is large, production efficiency is low, both face shapings are poor, product specification is low, easily be corroded, work-ing life is not long.Therefore, develop entirety very light, select conveniently, strong adaptability, the scatterer of the aluminum alloy material form that cost performance is good, its stereoscopic sense is strong, fine and smooth bright and clean after surperficial electropaining plastic-blasting, novel and beautiful, there is unique structure aesthetic feeling, and there is good heat transfer property, be better than traditional cast iron and steel radiator, but it still has the following disadvantages producing, selling and uying in process, need research and solve further:
1, with the continuous downward of terminal market selling price, its product monolithic weight has become the core of each product market competition, so the ultra-thin fin aluminium diecast alloy scatterer producing quality matetrial is extremely urgent;
2, its leading radiating mode of aluminium diecast alloy scatterer is convection current, and can its aluminium material capability and project organization be completed by extrusion process, has become the important bottleneck of aluminium diecast alloy scatterer development;
3, scatterer in use, is in high pressure conditions for a long time, and the compressive property of product material is one of important indicator of this product;
4, in product press casting procedure the integrity of the mobility of liquid aluminium alloy material and global formation, surface smooth finish, processing plasticity-, tensile strength, mutually involve and occur that the thermal stresses of iterative cycles all can affect the quality product of aluminium diecast alloy scatterer;
5, product causes distortion serious because blank cools rapidly in die sinking process after die cast, has a strong impact on the processing of its finished appearance and postorder.
Summary of the invention
In view of this, the object of the invention is, in order to provide a kind of, there is good conductivity, there is again good intensity and elongation, and antioxidant property is strong, and in aluminium alloy, add rare earth element and zr element, remove harmful element and gas, purified aluminum liquid, improve a kind of die-cast aluminum alloy material of its intensity, plasticity and resistance to pressure, and the preparation method of this material.
To achieve these goals, the technical solution used in the present invention is:
A kind of die-cast aluminum alloy material, it is characterized in that, the component of this material and weight percent are: Si:9.6% ~ 12.0%, Cu:1.5% ~ 3.5%, Mg :≤0.3%, Mn :≤0.50%, Sn :≤0.30%, Ni :≤0.50%, Zn :≤1.00%, Fe :≤0.8%, Pb :≤0.1%, Hg :≤0.1%, Cd :≤100ppm, rare earth elements RE: 0.025% ~ 0.24%, Zr:0.2% ~ 0.25%, surplus is Al.
Preferably, above-mentioned a kind of die-cast aluminum alloy material, wherein said rare earth elements RE is Rare Earth Elements Determination or mixed rare-earth elements.
Preferably, above-mentioned a kind of die-cast aluminum alloy material, wherein said rare earth element comprises cerium and lanthanum.
Preferably, above-mentioned a kind of die-cast aluminum alloy material, the content of wherein said rare-earth element cerium is 0.01-0.09%, and the content of lanthanum is 0.05-0.15%.
A preparation method for die-cast aluminum alloy material, is characterized in that, comprises the steps:
The first step: within the scope of above-mentioned element ratio, a selected group element ratio, then the alloy total amount prepared as required, extrapolate the quality of often kind of required elemental metals, or the quality of master alloy, establishment alloy production allocation sheet, and get the raw materials ready by allocation sheet choosing foot;
Second step: add appropriate aluminium ingot or molten aluminum liquid in smelting furnace, heating makes it to melt completely, and melting process completes in enclosed environment;
3rd step: first add Mg, Mn, Sn, Ni, Zn, Fe, Hg, Cu, Cd, Si, Pb pure metal or Al-Mg, Al-Mn, Al-Sn, Al-Ni, Al-Zn, Al-Fe, Al-Hg, Al-Cu, Al-Cd, Al-Si, Al-Pb alloy by formula rate, mixture is obtained after stirring, Zr and rare earth elements RE is added again to described mixture, stir, being formed can the melt of die casting;
4th step: carry out furnace refining to above-mentioned alloy melt, carries out insulation and die casting after refining, obtain new A l alloy product.
Beneficial effect of the present invention is mainly reflected in:
(1) ferro element, copper and zinc element can increase intensity and the elongation of aluminium alloy conductor, and improve the creep property of conductor; The rare earth element added can improve the internal structure of aluminium conductor, improves resistance of oxidation; The magnesium elements added and element silicon can increase the intensity of aluminium alloy conductor.
(2) in aluminium alloy, add a certain amount of rare earth elements RE and zirconium (Zr) element can crystal grain thinning, remove harmful element and gas, purified aluminum liquid, improve its intensity, plasticity and resistance to pressure, and by after adding rare earth elements RE and zirconium (Zr), to the mutation analysis of aluminum alloy organization, performance, determine optimal addn.
Embodiment
Further understand for making to have constitutional features of the present invention and effect of reaching and be familiar with, describe in detail in order to preferred embodiment, be described as follows:
A kind of die-cast aluminum alloy material, it is characterized in that, the component of this material and weight percent are: Si:9.6% ~ 12.0%, Cu:1.5% ~ 3.5%, Mg :≤0.3%, Mn :≤0.50%, Sn :≤0.30%, Ni :≤0.50%, Zn :≤1.00%, Fe :≤0.8%, Pb :≤0.1%, Hg :≤0.1%, Cd :≤100ppm, rare earth elements RE: 0.025% ~ 0.24%, Zr:0.2% ~ 0.25%, surplus is Al.
Wherein said rare earth elements RE is Rare Earth Elements Determination or mixed rare-earth elements.
Particularly, described rare earth element comprises cerium and lanthanum, and wherein the content of rare-earth element cerium is 0.01-0.09%, and the content of lanthanum is 0.05-0.15%.
A preparation method for die-cast aluminum alloy material, is characterized in that, comprises the steps:
The first step: within the scope of above-mentioned element ratio, a selected group element ratio, then the alloy total amount prepared as required, extrapolate the quality of often kind of required elemental metals, or the quality of master alloy, establishment alloy production allocation sheet, and get the raw materials ready by allocation sheet choosing foot;
Second step: add appropriate aluminium ingot or molten aluminum liquid in smelting furnace, heating makes it to melt completely, and melting process completes in enclosed environment;
3rd step: first add Mg, Mn, Sn, Ni, Zn, Fe, Hg, Cu, Cd, Si, Pb pure metal or Al-Mg, Al-Mn, Al-Sn, Al-Ni, Al-Zn, Al-Fe, Al-Hg, Al-Cu, Al-Cd, Al-Si, Al-Pb alloy by formula rate, mixture is obtained after stirring, Zr and rare earth elements RE is added again to described mixture, stir, being formed can the melt of die casting;
4th step: carry out furnace refining to above-mentioned alloy melt, carries out insulation and die casting after refining, obtain new A l alloy product.
Its technique effect produced is as follows:
(1) ferro element, copper and zinc element can increase intensity and the elongation of aluminium alloy conductor, and improve the creep property of conductor; The rare earth element added can improve the internal structure of aluminium conductor, improves resistance of oxidation; The magnesium elements added and element silicon can increase the intensity of aluminium alloy conductor.
(2) in aluminium alloy, add a certain amount of rare earth elements RE and zirconium (Zr) element can crystal grain thinning, remove harmful element and gas, purified aluminum liquid, improve its intensity, plasticity and resistance to pressure, and by after adding rare earth elements RE and zirconium (Zr), to the mutation analysis of aluminum alloy organization, performance, determine optimal addn.
This Novel aluminum alloy material performance data that the above technical scheme obtains is as follows:
1, Aluminum alloy tensile intensity (average, lower same): 228Mpa
2, hardness: 74.1HB
3, unit elongation: 14%
4, resultant metal hot strength: >=1.8W/kgk
5, product work pressure :≤1.2MPa
6, product resistivity :≤0.03 Ohms sq millimeter every meter.
More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; the just principle of the present invention described in above-described embodiment and specification sheets; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in claimed scope of the present invention.The protection domain of application claims is defined by appending claims and equivalent thereof.
Claims (5)
1. a die-cast aluminum alloy material, is characterized in that, the component of this material and weight percent are: Si:9.6% ~ 12.0%, Cu:1.5% ~ 3.5%, Mg :≤0.3%, Mn :≤0.50%, Sn :≤0.30%, Ni :≤0.50%, Zn :≤1.00%, Fe :≤0.8%, Pb :≤0.1%, Hg :≤0.1%, Cd :≤100ppm, rare earth elements RE: 0.025% ~ 0.24%, Zr:0.2% ~ 0.25%, surplus is Al.
2. a kind of die-cast aluminum alloy material according to claim 1, is characterized in that, described rare earth elements RE is Rare Earth Elements Determination or mixed rare-earth elements.
3. a kind of die-cast aluminum alloy material according to claim 2, is characterized in that, described rare earth element comprises cerium and lanthanum.
4. a kind of die-cast aluminum alloy material according to claim 3, is characterized in that, the content of described rare-earth element cerium is 0.01-0.09%, and the content of lanthanum is 0.05-0.15%.
5. a preparation method for a kind of die-cast aluminum alloy material as claimed in claim 1 or 2, is characterized in that, comprise the steps:
The first step: within the scope of above-mentioned element ratio, a selected group element ratio, then the alloy total amount prepared as required, extrapolate the quality of often kind of required elemental metals, or the quality of master alloy, establishment alloy production allocation sheet, and get the raw materials ready by allocation sheet choosing foot;
Second step: add appropriate aluminium ingot or molten aluminum liquid in smelting furnace, heating makes it to melt completely, and melting process completes in enclosed environment;
3rd step: first add Mg, Mn, Sn, Ni, Zn, Fe, Hg, Cu, Cd, Si, Pb pure metal or Al-Mg, Al-Mn, Al-Sn, Al-Ni, Al-Zn, Al-Fe, Al-Hg, Al-Cu, Al-Cd, Al-Si, Al-Pb alloy by formula rate, mixture is obtained after stirring, Zr and rare earth elements RE is added again to described mixture, stir, being formed can the melt of die casting;
4th step: carry out furnace refining to above-mentioned alloy melt, carries out insulation and die casting after refining, obtain new A l alloy product.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017185321A1 (en) * | 2016-04-29 | 2017-11-02 | GM Global Technology Operations LLC | Die-casting aluminum alloys for thin-wall casting components |
| CN107385286A (en) * | 2017-07-27 | 2017-11-24 | 王婷 | A kind of pack alloy |
| CN107901078A (en) * | 2017-09-27 | 2018-04-13 | 宁波华源精特金属制品有限公司 | A kind of robot wrist and its preparation process |
| CN109536790A (en) * | 2018-12-04 | 2019-03-29 | 合肥江淮铸造有限责任公司 | Superelevation tensile strength aluminum alloy materials and manufactured aluminium alloy cylinder |
| CN110453115A (en) * | 2019-09-04 | 2019-11-15 | 东莞理工学院 | A kind of automotive speed changer die casting for shell aluminium alloy and its preparation process |
| CN113843406A (en) * | 2021-10-08 | 2021-12-28 | 广东鸿图南通压铸有限公司 | Die-casting process of super-integrated transmission case |
-
2015
- 2015-07-16 CN CN201510418482.7A patent/CN105112740A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017185321A1 (en) * | 2016-04-29 | 2017-11-02 | GM Global Technology Operations LLC | Die-casting aluminum alloys for thin-wall casting components |
| CN107385286A (en) * | 2017-07-27 | 2017-11-24 | 王婷 | A kind of pack alloy |
| CN107901078A (en) * | 2017-09-27 | 2018-04-13 | 宁波华源精特金属制品有限公司 | A kind of robot wrist and its preparation process |
| CN109536790A (en) * | 2018-12-04 | 2019-03-29 | 合肥江淮铸造有限责任公司 | Superelevation tensile strength aluminum alloy materials and manufactured aluminium alloy cylinder |
| CN110453115A (en) * | 2019-09-04 | 2019-11-15 | 东莞理工学院 | A kind of automotive speed changer die casting for shell aluminium alloy and its preparation process |
| CN110453115B (en) * | 2019-09-04 | 2021-11-19 | 东莞理工学院 | Novel automobile transmission shell die-casting aluminum alloy and preparation process thereof |
| CN113843406A (en) * | 2021-10-08 | 2021-12-28 | 广东鸿图南通压铸有限公司 | Die-casting process of super-integrated transmission case |
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Application publication date: 20151202 |