CN1288267C - Cast aluminum alloys in high conductivity - Google Patents
Cast aluminum alloys in high conductivity Download PDFInfo
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- CN1288267C CN1288267C CN 200410067451 CN200410067451A CN1288267C CN 1288267 C CN1288267 C CN 1288267C CN 200410067451 CN200410067451 CN 200410067451 CN 200410067451 A CN200410067451 A CN 200410067451A CN 1288267 C CN1288267 C CN 1288267C
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Abstract
The present invention relates to casting aluminum alloy with high conductivity, which belongs to the field of casting aluminum alloy. The casting aluminum alloy with high conductivity is characterized in that the casting aluminum alloy is prepared from the following materials according to the proportion by weight: 9.0% to 10.0% of Si, at most 1.2% of Cu, at most 0.5% of Mg, at most 1.1% of Zn, at most 0.8% of Fe and Al as the rest. Compared with the prior art, the casting aluminum alloy has the advantages that the content of Si in the aluminum alloy is controlled, and the content of impurities of Cu, Mg, Zn and Fe is maintained on the wide level; thus, the casting aluminum alloy has favorable casting property, good mechanical property, good corrosion resisting property, low price and simple and convenient smelting technology; electric conductivity gamma is larger than and equal to 20 s/m. The casting aluminum alloy can satisfy use requirements for a casting aluminum alloy part in equipment having high requirements for electric conductivity. The casting aluminum alloy has simple production technology and casting methods, has a wide application prospect and can obviously reduce cost.
Description
[technical field]
The present invention relates to the cast aluminium alloy field, specifically a kind of cast aluminum alloys in high conductivity.
[background technology]
As everyone knows, cast aluminium alloy can be divided into four classes such as aluminum silicon alloy, aluminum-copper alloy, aluminum magnesium alloy and aluminium-zinc alloy and each class can be divided into multiple alloy designations, characteristic that each trade mark is had nothing in common with each other and purposes according to its classification.As its main casting characteristics of diecasting aluminum-silicon alloy YL102 are good flowing properties, no hot cracking tendency, and resistance to air loss is good, and shrinking percentage is little, but air-breathing tendency is big, is easy to form pin hole.YL102 electroconductibility is not high enough, can not satisfy the requirement of some part.The part that the high conductivity requirement is arranged as the part in the high-tension power transmission and transformation equipment.The general foreign matter content of cast aluminium alloy is higher, also can change aborning, and foreign matter content also can increase to some extent, and the increase of foreign matter content can cause that more specific conductivity descends, the therefore difficult requirement of satisfying the high conductivity of aluminum alloy casting.
Use diecasting aluminum-silicon alloy YL102 (YZAlSi12) composition (quality %) composed of the following components widely:
Si 10-13％
The Al surplus
Foreign matter content is
Cu ≤0.6％
Mn ≤0.6％
Mg ≤0.05％
Fe ≤1.2％
Zn ≤0.3％
Total impurities≤2.3%
Diecasting aluminum-silicon alloy YL102 have advantages of good casting, mechanical property better, advantage such as corrosion resistance and good, price comparison be low, generally be used for making the shape more complicated, resistance to air loss requires high and corrosion-resistant but bear the not high part of burden requirement.But the lower (γ≤17S/m), can not be fit to the part that some have high conductivity to require of its specific conductivity.
The structural parts that a part in the high-tension power transmission and transformation equipment has high conductivity to require needs to adopt cast aluminium alloy die casting or the low-pressure casting that foreign matter content is low, specific conductivity is higher to form.As German standard cast aluminium alloy G-AlSi10Mg, starting material foreign matter content low (total impurities≤0.15%), the aluminum alloy casting mechanical property is good, the higher (conductivity gamma＞17S/m) of specific conductivity.Adopt homemade cast aluminium alloy to make the high-tension power transmission and transformation equipment part of high conductivity standard for making these foundry goods production domesticization, particularly expectation.But because the general foreign matter content of homemade cast aluminium alloy is higher, also can change aborning, increase to some extent, the difficult high conductivity requirement of satisfying aluminum alloy casting.
For this reason, be necessary to study the influence relation of composition in the cast aluminium alloy to specific conductivity, expectation can suitably be adjusted composition in the cast aluminium alloy, its foreign matter content clearly is controlled in the suitable scope, make aluminum alloy casting under the prerequisite of guaranteeing higher mechanical property, its specific conductivity reaches higher standard.Replace the low high-quality cast aluminium alloy of foreign matter content with the conventional cast aluminium alloy, this is to reducing production costs, and increasing economic efficiency is significant.
[summary of the invention]
It is a kind of at a kind of cast aluminum alloys in high conductivity of guaranteeing advantages of good casting, mechanical property, excellent corrosion resisting performance, Control of Impurities scope are lower than broad, price comparison preferably conductivity gamma 〉=20S/m that the object of the invention is to provide.
In order to realize above-mentioned purpose, the present invention realizes by the following method: a kind of cast aluminum alloys in high conductivity, comprise raw materials such as aluminium, silicon, and to form by aluminium, silicon, impurity copper, magnesium, zinc, iron etc., its composition (quality %) is:
Si 9.0％-10.0％
Cu is not more than 1.2%
Mg is not more than 0.5%
Zn is not more than 1.1%
Fe is not more than 0.8%
The Al surplus
The metallographic structure of cast aluminum alloys in high conductivity is mainly to have α (Al) and the Si of Si to form by solid solution, and the size of aluminium alloy electric conductivity depends primarily on the size of α (Al) electric conductivity, also is subjected to the influence of Si form in the aluminium alloy simultaneously.Si content high energy improves the flowability of alloy, but Si is a kind of semi-conductor, and resistivity is more much higher than Al matrix, and the raising of Si content has directly reduced effective conductive section of Al matrix, and the specific conductivity of alloy is descended.The total amount sum of copper, magnesium, zinc, iron is not more than 3.6%.
Contain the Fe amount in the cast aluminium alloy and be lower than at 0.7% o'clock, form laminar A1-FeSiAl usually
5-Si eutectic structure.Contain the Fe amount in the cast aluminium alloy and be higher than at 0.7% o'clock, acicular FeSiAl can occur
5Nascent brilliant tissue descends the mechanical property of cast aluminium alloy and specific conductivity.
Cu in the alloy≤1.2% can guarantee that the specific conductivity of alloy remains on one than higher level.This is because specific conductivity is very responsive to the Cu of solid solution, and the massfraction of Cu can make the lattice of aluminum substrate that bigger distortion takes place and influence the motion of the unbound electron in the matrix when increasing, cause the specific conductivity of alloy to descend.
In high silicon cast aluminium alloy, Mg and Si mainly form Mg
2The Si phase.Under as-heat-treated condition, Mg
2Si is dissolved in the sosoloid, and separates out in ag(e)ing process subsequently, plays the precipitation strength effect.Through test determination, contain the Mg amount and increase the specific conductivity decline that makes cast aluminium alloy.
When Zn content is low, be solid-solubilized in mostly in the aluminium base sosoloid, comparatively blunt to the specific conductivity influence of cast aluminium alloy.
Conductivity gamma 〉=the 20S/m of this cast aluminium alloy.
The present invention with prior art relatively, controlled the Si content in the aluminium alloy, content to impurity Cu, Mg, Zn, Fe maintains on the level than broad, make this cast aluminium alloy guarantee that advantages of good casting is arranged, preferably mechanical property, excellent corrosion resisting performance, price comparison is low, melting technology is easy and conductivity gamma 〉=20S/m, can satisfy the service requirements of casting aluminum alloy parts in some equipment that specific conductivity is had relatively high expectations.Production technique of the present invention and castmethod are simple, can be significantly reduced to this, the application prospect broadness.
[specific embodiment]
The cast aluminium alloy (quality %) of the following composition of preparation:
Si 9.0％-10.0％
The Al surplus
Foreign matter content is:
Cu ≤1.2％
Mg ≤0.5％
Zn ≤1.1％
Fe ≤0.8％
Total impurities≤3.6%
The casting step is:
1.90.5%A00 fine aluminium adds 9.5% high-purity crystallized silicon fusing.
2.YL102 (or ZL102) adds the fusing of A00 fine aluminium.A00 fine aluminium add-on is decided on Si content among the YL102 (or ZL102).
All can add in two kinds of compound methods and be no more than 20% foundry returns.
This cast aluminum alloys in high conductivity is applicable to casting or die cast.Teeming temperature is 680-710 ℃.
Compare with aluminium diecast alloy YL102 (YZAlSi12), the improvement of cast aluminum alloys in high conductivity maximum of the present invention has been to keep on the basis of the original advantage of alloy specific conductivity to be improved greatly.Originally the specific conductivity of aluminium diecast alloy YL102 is often less than 17S/m.Owing to the corresponding content that reduces Si, Fe, even other impurity elements increase to some extent, the specific conductivity of cast aluminum alloys in high conductivity also can improve greatly now, tests its specific conductivity with eddy current numeral conductivity measurement, gets its conductivity gamma 〉=20S/m.
Simultaneously,, above-mentioned cast aluminium alloy is carried out the test of mechanical property, get tensile strength sigma in order to ensure the mechanical property of above-mentioned cast aluminium alloy
b=220Mpa, elongation (l
0=50) be δ 〉=2%, Brinell hardness (5/250/30) HB 〉=60, mechanical property satisfies the requirement of GB/T 15115-94.
Claims (2)
1. a cast aluminum alloys in high conductivity is characterized in that being made up of aluminium, silicon, copper, magnesium, zinc, iron, and its composition (quality %) is:
Si 9.0％-10.0％
Cu is not more than 1.2%
Mg is not more than 0.5%
Zn is not more than 1.1%
Fe is not more than 0.8%
The Al surplus.
2. a kind of cast aluminum alloys in high conductivity according to claim 1 is characterized in that the conductivity gamma of this cast aluminium alloy is not less than 20S/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410067451 CN1288267C (en) | 2004-10-25 | 2004-10-25 | Cast aluminum alloys in high conductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410067451 CN1288267C (en) | 2004-10-25 | 2004-10-25 | Cast aluminum alloys in high conductivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1600882A CN1600882A (en) | 2005-03-30 |
| CN1288267C true CN1288267C (en) | 2006-12-06 |
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ID=34666619
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| CN 200410067451 Expired - Fee Related CN1288267C (en) | 2004-10-25 | 2004-10-25 | Cast aluminum alloys in high conductivity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011237A (en) * | 2009-09-04 | 2011-04-13 | 余定泉 | Ultrastrong aluminum alloy heald frame for shuttleless loom and production process thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100538917C (en) * | 2005-12-26 | 2009-09-09 | 云南铜业股份有限公司 | A kind of production method of copper-tin alloy conducting wire |
| CN105296818A (en) * | 2014-08-01 | 2016-02-03 | 比亚迪股份有限公司 | Aluminum alloy and preparation method and application thereof |
| CN106756289A (en) * | 2016-11-23 | 2017-05-31 | 薛亚红 | A kind of high-pressure casting aluminium alloy |
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2004
- 2004-10-25 CN CN 200410067451 patent/CN1288267C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011237A (en) * | 2009-09-04 | 2011-04-13 | 余定泉 | Ultrastrong aluminum alloy heald frame for shuttleless loom and production process thereof |
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| Publication number | Publication date |
|---|---|
| CN1600882A (en) | 2005-03-30 |
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Granted publication date: 20061206 Termination date: 20111025 |