CN102146541B - Al-Si-Cu-Mg-xLa rare earth die casting aluminum alloy - Google Patents
Al-Si-Cu-Mg-xLa rare earth die casting aluminum alloy Download PDFInfo
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Abstract
The invention provides an Al-Si-Cu-Mg-xLa rare earth die casting aluminum alloy which comprises 0.1-0.9% of rare earth La accounting for the weight percent of the Al-Si-Cu-Mg-xLa rare earth aluminum alloy, 11.0% of Si accounting for the weight percent of the Al-Si-Cu-Mg alloy, 2.5% of Cu accounting for the weight percent of the Al-Si-Cu-Mg alloy, 0.2% of Mg accounting for the weight percent of the Al-Si-Cu-Mg alloy and the balance of Al. The Al-Si-Cu-Mg-xLa rare earth die casting aluminum alloy has the beneficial effects that the price of the rare earth La is cheap; the production cost is not increased by adding the rare earth La in the aluminum alloy; and by addition of rare earth La, the nodulized grains can be obviously fined, and the shape of the second phase is changed, thereby greatly improving the strength of the alloy. The alloy provided by the invention has the advantages of simple process, safety and reliability and no three-waste emission, and is convenient for operation.
Description
Technical field
The present invention relates to a kind of rare earth die-casting aluminium alloy, relate in particular to a kind of Al-Si-Cu-Mg-xLa rare earth die-casting aluminium alloy.
Background technology
Rare earth element has unique electron structure and physicochemical property, unique 4f electronic structure, large magnetic moment of atom, the very strong characteristics such as spin coupling are arranged, when forming rare earth compounding with other elements, ligancy can change between 6～12, and the crystal mechanism of rare earth compound also is diversified.Therefore, rare earth element can be widely used in the new and high technology field of new.
Abroad to the research of rare earth aluminium alloy seldom, contain the research of Sc aluminium alloy more, but have Sc element price very expensive, primary for the space flight military industry field, aspect civilian, be difficult to be used widely.Domestic research mainly with rare earth element as a kind of refining agent and alterant, and obtained good effect, but rare-earth elements La yet there are no report as a kind of aluminium diecast alloy of alloy element.
Aluminium copper silicon alloy for die casting are class high strength die-casting aluminum alloys, such as Y108, Y112, Y113, the Y117 etc. of China, and physical strength higher (GB/T15115-94), numerical value is as follows:
The Y108 tensile strength sigma
b=240N/mm
2, unit elongation δ=1%, Brinell hardness HB=90
The Y112 tensile strength sigma
b=240N/mm
2, unit elongation δ=1%, Brinell hardness HB=85
The Y113 tensile strength sigma
b=230N/mm
2, unit elongation δ=1%, Brinell hardness HB=85
The Y117 tensile strength sigma
b=230N/mm
2, unit elongation δ＜1%.
Summary of the invention
The object of the present invention is to provide a kind of Al-Si-Cu-Mg-xLa rare earth die-casting aluminium alloy, joined in the Al-Si-Cu-Mg alloy with appropriate vol, can effective Microalloying Effect occur with alloy, to put forward heavy alloyed mechanical property.
The present invention is achieved like this, its moiety is: added in the Al-Si-Cu-Mg alloy that to account for this Al-Si-Cu-Mg-xLa rare earth aluminium alloy weight percent be 0.1～0.9% rare earth La, the weight percent of Si is 11.0% in the described Al-Si-Cu-Mg alloy, the weight percent of Cu is 2.5%, the weight percent of Mg is 0.2%, and surplus is Al.
Described rare earth La accounts for this Al-Si-Cu-Mg-xLa rare earth aluminium alloy weight and is preferably 0.45%～0.75%.
Adopt traditional metallurgy method to prepare the Al-Si-Cu-Mg-xLa alloy.At first take pure Al and pure La as raw material prepares the Al-La master alloy through founding, then carry out melting take fine aluminium, pure silicon, fine copper, pure magnesium and Al-La master alloy as raw material in resistance furnace, insulation can begin die casting after the refining treatment.
Materials mechanics experimental: CSS-44200 almighty test machine experiment of hardness condition: HXS-1000Z digital micro-analysis sclerometer die casting sample meets the A type tension sample physical dimension among standard GB/T/T13822-92, as cast condition is without any thermal treatment, do not carry out x-ray inspection, random sampling yet.
Test result:
1, rare earth La content is 0%
Tensile strength mean value σ
b231.622N/mm
2, maximum having occurred is σ
b234.412N/mm
2
Unit elongation mean value δ〉1.0%, wherein maximum is 1.3%, Brinell hardness HB〉85
2, rare earth La content is 0.3%
Tensile strength mean value σ
b266.790N/mm
2, maximum having occurred is σ
b284.412N/mm
2
Unit elongation mean value δ〉3.0%, wherein maximum is 3.6%, Brinell hardness HB〉90
3, rare earth La content is 0.6%
Tensile strength mean value σ
b286.531N/mm
2, maximum having occurred is σ
b301.352N/mm
2
Unit elongation mean value δ〉4.0%, wherein maximum is 4.7%, Brinell hardness HB〉95
4, rare earth La content is 0.9%
Tensile strength mean value σ
b278.642N/mm
2, maximum having occurred is σ
b292.532N/mm
2
Unit elongation mean value δ〉3.5%, wherein maximum is 4.0%, Brinell hardness HB〉90
Below respectively organizing test result shows with the rare-earth elements La mechanical property as the Al-Si-Cu-Mg-xLa aluminium diecast alloy of alloy element, especially tensile strength unit elongation and is much higher than GB/T15115-94 to the mechanical property of existing aluminium diecast alloy requirement.Produce thus a kind of novel Al-Si-Cu-Mg-xLa aluminium diecast alloy.
Technique effect of the present invention is: the price of rare earth La is very cheap, in aluminium alloy, add rare earth La and can not improve production cost, and the adding of rare earth La is refinement nodularization crystal grain obviously, change the second-phase form, thereby increase substantially alloy strength, and technique is simple, safe and reliable, easy to operate, and three-waste free pollution.
Embodiment
The present invention will be described further by following examples.
Comparative Examples 1: adopt the standby Al-Si-Cu-Mg alloy of ingot metallurgy legal system, raw materials usedly be high-purity Al (purity is 99.99%), industrial pure silicon Si(99.9%) industrial pure copper (99.9%), pure magnesium Mg(99.9%).At first high-purity Al215.5 gram is added the graphite clay crucible, melting in resistance furnace, smelting temperature is 780 ℃.After rafifinal dissolves fully, in melt, add pure silicon Si27.5 gram, after stirring, add again fine copper 6.25 grams and pure magnesium 0.75 gram, after stirring, melt temperature is dropped to 720 ℃, be incubated half an hour, degasification is skimmed, and at last melt is poured in the punching block, cools off the demoulding after 4 minutes.
Comparative Examples 2: adopt the standby Al-Si-Cu-Mg alloy of ingot metallurgy legal system, raw materials usedly be high-purity Al (purity is 99.99%), industrial pure silicon Si(99.9%) industrial pure copper (99.9%), pure magnesium Mg(99.9%).At first rafifinal 215.5 grams are added the graphite clay crucible, melting in resistance furnace, smelting temperature is 780 ℃.After rafifinal dissolves fully, in melt, add pure silicon Si27.5 gram, after stirring, add again fine copper 6.25 grams and pure magnesium 0.75 gram, after stirring, melt temperature is dropped to 720 ℃, be incubated 30 minutes, degasification is skimmed, melt temperature is dropped to 650 ℃ after, be cast into the standard coupon.
Example 1: adopt the standby Al-Si-Cu-Mg-0.3La alloy of ingot metallurgy legal system, at first take high-purity Al (purity is as 99.99%) and pure silicon La(99.9%) as raw material, adopts the method for mixing is carried out melting in vacuum induction furnace, be prepared into the Al-10La master alloy.Rafifinal 208.7 grams are added the graphite clay crucible, melting in resistance furnace, smelting temperature is 780 ℃.After rafifinal dissolves fully, in melt, add pure silicon Si27.5 gram, after stirring, add again fine copper 6.25 grams and pure magnesium 0.75 gram, after stirring, melt temperature is dropped to 720 ℃, add the 7.5 gram Al-10La master alloys that prepare again, be incubated 30 minutes, degasification is skimmed, at last melt is poured in the punching block, cool off the demoulding after 4 minutes.
Example 2: adopt the standby Al-Si-Cu-Mg-0.3La alloy of ingot metallurgy legal system, at first take high-purity Al (purity is as 99.99%) and pure silicon La(99.9%) as raw material, adopts the method for mixing is carried out melting in vacuum induction furnace, be prepared into the Al-10La master alloy.Rafifinal 208.7 grams are added the graphite clay crucible, melting in resistance furnace, smelting temperature is 780 ℃.After rafifinal dissolves fully, in melt, add pure silicon Si27.5 gram, after stirring, add again fine copper 6.25 grams and pure magnesium 0.75 gram, after stirring, melt temperature is dropped to 720 ℃, add the 7.5 gram Al-10La master alloys that prepare again, be incubated 30 minutes, degasification is skimmed, after melt temperature dropped to 650 ℃, be cast into the standard coupon.
The adding of rare earth La is refinement nodularization crystal grain obviously, and change the second-phase form, thereby increase substantially alloy strength, and technique is simple, safe and reliable, easy to operate, and three-waste free pollution.
Claims (1)
1. the preparation method of an Al-Si-Cu-Mg-xLa rare earth die-casting aluminium alloy, it is characterized in that at first take purity as 99.99% Al and the La of purity as 99.9% as raw material, adopt the method for mixing is carried out melting in vacuum induction furnace, be prepared into the Al-10La master alloy; Rafifinal 208.7 grams are added the graphite clay crucible, melting in resistance furnace, smelting temperature is 780 ℃, after rafifinal melts fully, in melt, add pure silicon Si27.5 gram, after stirring, add again fine copper 6.25 grams and pure magnesium 0.75 gram, after stirring, melt temperature is dropped to 720 ℃, add again the 7.5 gram Al-10La master alloys that prepare, be incubated 30 minutes, degasification is skimmed, and at last melt is poured in the punching block, cools off the demoulding after 4 minutes.
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| CN 201110069390 CN102146541B (en) | 2011-03-22 | 2011-03-22 | Al-Si-Cu-Mg-xLa rare earth die casting aluminum alloy |
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|---|---|---|---|
| CN 201110069390 CN102146541B (en) | 2011-03-22 | 2011-03-22 | Al-Si-Cu-Mg-xLa rare earth die casting aluminum alloy |
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| CN102719687B (en) * | 2012-05-17 | 2014-06-18 | 南昌大学 | Preparation method of rare earth aluminum alloy semi-solid slurry |
| CN108179330A (en) * | 2017-09-12 | 2018-06-19 | 广东省材料与加工研究所 | The pack alloy of strong high-ductility high formability in a kind of |
| CN110923520A (en) * | 2019-12-04 | 2020-03-27 | 苏州仓松金属制品有限公司 | Rare earth aluminum alloy material and composition control process thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289856A (en) * | 2000-09-29 | 2001-04-04 | 江汉大学 | Compression casting of Al alloy with Al-Si-Cu rare earth |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289856A (en) * | 2000-09-29 | 2001-04-04 | 江汉大学 | Compression casting of Al alloy with Al-Si-Cu rare earth |
Non-Patent Citations (3)
| Title |
|---|
| 《稀土对Al-Si-Cu-Mg合金组织和性能的影响》;李荣德等;《铸造》;20080831;第57卷(第8期);第818-822页 * |
| 李荣德等.《稀土对Al-Si-Cu-Mg合金组织和性能的影响》.《铸造》.2008,第57卷(第8期),第818-822页. |
| 罗启全.《压铸铝合金牌号、化学成分》.《铝合金熔炼与铸造》.广东科技出版社,2002,第270页附表3.1. * |
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