CN100577835C - Method for preparing high-silicon aluminum alloy - Google Patents

Method for preparing high-silicon aluminum alloy Download PDF

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Publication number
CN100577835C
CN100577835C CN200810019205A CN200810019205A CN100577835C CN 100577835 C CN100577835 C CN 100577835C CN 200810019205 A CN200810019205 A CN 200810019205A CN 200810019205 A CN200810019205 A CN 200810019205A CN 100577835 C CN100577835 C CN 100577835C
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aluminium
weight
refining
content
aluminum alloy
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CN200810019205A
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Chinese (zh)
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CN101215658A (en
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冯身霖
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无锡海特铝业有限公司
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Abstract

The invention discloses a high silicon-aluminum alloy and a method for preparation, in particular to the high-silicon aluminum alloy with excellent wear resistance and a method for preparation. The invention comprises 10.5-11.2 percent of silicon powder, 2.2-2.7 percent of copper clad aluminum alloy, 0.2-0.5 percent of magnesium, 85.6-87.1 percent of aluminum, which are made through melting, mixing, first refining, second refining and casting. The high silicon-aluminum alloy has excellent wear resistance, high tensile strength and high tensile strength, and is capable of meeting the performance requirements of an air conditioner of an automobile.

Description

A kind of method of producing silumin
Technical field
The present invention relates to a kind of aluminium alloy manufacture method.Specifically, be the method for producing silumin with excellent wear energy.
Background technology
All know at machine industry, more and more higher to performance demands such as wear-resisting, the tensile strength of aluminium alloy and Brinell hardness.At present, the silumin that machine industry such as air conditioner for automobile manufacturing are used all is No. 4004 aluminum silicon alloys and No. 4032 aluminum silicon alloys of producing according to GBT3190-1996, and the content of silicon is respectively 9.0 weight %~10.5 weight % and 11.0 weight %~13.5 weight % in No. 4004 aluminum silicon alloys and No. 4032 aluminum silicon alloys.The aluminum silicon alloy that silicone content is less than or equal to 10 weight % is a hypoeutectic al-si alloy, primary is the toughness phase mutually in the hypoeutectic al-si alloy, therefore, the wear resisting property of this hypoeutectic al-si alloy is relatively poor, tensile strength and fatigue strength are all lower, is difficult to satisfy the performance requriements of air conditioner for automobile.Silicone content was brilliant aluminum silicon alloy more than or equal to the aluminum silicon alloy of 12 weight %, and the primary silicon particle of crossing in the brilliant aluminum silicon alloy is the hard point, and therefore, the brilliant aluminum silicon alloy wear resisting property of this mistake is better.But content one height of silicon, primary silicon thick, that corner angle are arranged can be separated out, thereby can worsen the performance of aluminum silicon alloy.And primary silicon phase hardness one height, process the comparison difficulty.
On castmethod, the primary silicon in the silumin is carried out refinement and suppresses separating out of it, make it to have eutectic structure, can improve the intensity and the wear resisting property of alloy.And to obtain Eutectic Silicon in Al-Si Cast Alloys tissue completely, just must be to the primary silicon processing of going bad.Traditional method is to adopt the sodium salt processing of going bad.Adopt sodium salt processings of go bad, working lipe is short, and the size of the back primary silicon of going bad has reduced the wear resisting property of alloy at 30~120 microns, too big.In addition, also be to adopt traditional method on the alloying technology of element silicon, this traditional method is to adopt master alloy to carry out, and is about to add after silicon metal is made into aluminium silicon master alloy earlier again.Because aluminum silicon alloy remelting meeting causes secondary pollution, so, also can reduce the wear resisting property of goods.Again on the one hand, for improving the wear resisting property of alloy, in fusion process, should reduce slag, the gas content of molten aluminium as far as possible.The traditional method that reduces slag, gas content all is to adopt filter wire cloth or single-stage ceramic filter, and filter effect is relatively poor.Therefore, the silumin wear resisting property of making is relatively poor.
Summary of the invention
The problem to be solved in the present invention provides a kind of method of producing silumin.The silumin that adopts this method to produce, wear resisting property is good, tensile strength and fatigue strength is all than higher.
For addressing the above problem, take following technical scheme:
The characteristics that the present invention produces the method for silumin are to be made by the raw material of following parts by weight:
Silica flour 10.5~11.2%;
Copper cover aluminum alloy 2.2~2.7%;
Magnesium 0.2~0.5%;
Aluminium 85.6~87.1%;
Wherein: in the silica flour, the weight content of silicon 〉=98.5%, its granularity≤5mm; In the copper cover aluminum alloy, copper is 30~40 weight %, and aluminium is 60~70 weight %; In the magnesium, the content of magnesium 〉=99.8 weight %; In the aluminium, the content of aluminium 〉=99.7 weight %.
Described copper cover aluminum alloy, magnesium and aluminium are respectively copper cover aluminum alloy pig, magnesium ingot and aluminium ingot.
Earlier aluminium is dropped in the smelting furnace, make it be fused into molten aluminium;
Molten aluminium is superheated to 760~800 ℃ again, and silica flour is joined in the molten aluminium with carrier gas; Afterwards, add copper cover aluminum alloy and magnesium successively, and stirred 10~15 minutes, obtain blend melt.Carrier gas wherein is pressurized air or argon gas;
Afterwards, the temperature of blend melt is adjusted to 740~760 ℃, to blend melt refining 20~25 minutes, and remove the liquid level scum silica frost, finish refining for the first time by blowing argon gas in the stove;
Afterwards, the blend melt temperature after the refining first time is adjusted to 720~760 ℃, and add master alloy aluminium strontium, and stirred the processing of going bad 8~10 minutes according to the ratio of the 0.2 weight %~0.4 weight % of aluminium; Afterwards,, and remove removing dross, finish refining for the second time the rotten blend melt blowing argon gas refining of handling of process 8~10 minutes; In the described aluminium strontium, strontium is 10 weight %, and aluminium is 90 weight %;
At last, by online argon gas refining and twin-stage ceramic filter, will be cast into the high-silicon alloy rod through the purified blend melt second time.
Take such scheme, have the following advantages:
Because the silicone content that the present invention produces in its raw material of method of silumin is 10.5~11.2 weight %, belongs to the Eutectic Silicon in Al-Si Cast Alloys alloy.Like this, both guaranteed the wear resisting property of silumin, the tensile strength and the fatigue strength that can not cause separating out of primary silicon to be brought again because of silicone content is too high reduce.
Again owing on castmethod, adopt aluminium strontium master alloy to the molten aluminium processing of going bad, and aluminium strontium master alloy is a kind of good long-acting alterant, its have pollution-free, loss is few, effect is lasting, do not have performances such as rotten, and the rotten effect of remelting can be hereditary, the size of rotten back primary silicon can obtain Eutectic Silicon in Al-Si Cast Alloys tissue completely below 50 microns.
Embodiment
First embodiment:
Choose the silica flour of 10.5 weight %, the copper cover aluminum alloy pig of 2.7 weight %, the magnesium ingot of 0.3 weight %, the aluminium ingot of 87.1 weight %, stand-by.Wherein: in the silica flour, the weight content of silicon 〉=98.5%, its granularity≤5mm; In the copper cover aluminum alloy, copper is 30 weight %, and aluminium is 70 weight %; In the magnesium, the content of magnesium 〉=99.8 weight %; In the aluminium, the content of aluminium 〉=99.7 weight %.
Earlier aluminium ingot is dropped in the smelting furnace, make it be fused into molten aluminium.
Molten aluminium is superheated to 760 ℃ again, and silica flour is joined in the molten aluminium with carrier gas; Afterwards, add copper cover aluminum alloy pig and magnesium ingot successively, and stirred 10 minutes, obtain blend melt.Carrier gas wherein is a pressurized air.
Afterwards, the temperature of blend melt is adjusted to 740 ℃, to blend melt refining 20 minutes, and remove the liquid level scum silica frost, finish refining for the first time by blowing argon gas in the stove.
Afterwards, the blend melt temperature after the refining first time is adjusted to 720 ℃, and add master alloy aluminium strontium, and stirred the processing of going bad 8 minutes according to the ratio of 0.2 weight % of aluminium.Afterwards,, and remove removing dross, finish refining for the second time the rotten blend melt blowing argon gas refining of handling of process 8 minutes.
At last, by online argon gas refining and twin-stage ceramic filter, will be cast into the high-silicon alloy rod through the purified blend melt second time.
Wherein: in the aluminium strontium, strontium is 10 weight %, and aluminium is 90 weight %; Described carrier gas is a pressurized air; The purity of described argon gas 〉=99.99%; Described twin-stage ceramic filter is respectively 30 orders and 50 purpose screen plates.
Second embodiment:
Choose the silica flour of 10.9 weight %, the copper cover aluminum alloy pig of 2.5 weight %, the magnesium ingot of 0.5 weight %, the aluminium ingot of 86.3 weight %, stand-by.Wherein: in the silica flour, the weight content of silicon 〉=98.5%, its granularity≤5mm; In the copper cover aluminum alloy, copper is 35 weight %, and aluminium is 65 weight %; In the magnesium, the content of magnesium 〉=99.8 weight %; In the aluminium, the content of aluminium 〉=99.7 weight %.
Earlier aluminium ingot is dropped in the smelting furnace, make it be fused into molten aluminium.
Molten aluminium is superheated to 780 ℃ again, and silica flour is joined in the molten aluminium with carrier gas; Afterwards, add copper cover aluminum alloy pig and magnesium ingot successively, and stirred 12 minutes, obtain blend melt.Carrier gas wherein is an argon gas.
Afterwards, the temperature of blend melt is adjusted to 750 ℃, to blend melt refining 23 minutes, and remove the liquid level scum silica frost, finish refining for the first time by blowing argon gas in the stove.
Afterwards, the blend melt temperature after the refining first time is adjusted to 740 ℃, and add master alloy aluminium strontium, and stirred the processing of going bad 9 minutes according to the ratio of 0.3 weight % of aluminium.Afterwards,, and remove removing dross, finish refining for the second time the rotten blend melt blowing argon gas refining of handling of process 9 minutes.
At last, by online argon gas refining and twin-stage ceramic filter, will be cast into the high-silicon alloy rod through the purified blend melt second time.
Wherein: in the aluminium strontium, strontium is 10 weight %, and aluminium is 90 weight %; Described carrier gas is an argon gas; The purity of described argon gas 〉=99.99%; Described twin-stage ceramic filter is respectively 30 orders and 50 purpose screen plates.
The 3rd embodiment:
Choose the silica flour of 11.2 weight %, the copper cover aluminum alloy pig of 2.2 weight %, the magnesium ingot of 0.2 weight %, the aluminium ingot of 85.6 weight %, stand-by.Wherein: in the silica flour, the weight content of silicon 〉=98.5%, its granularity≤5mm; In the copper cover aluminum alloy, copper is 40 weight %, and aluminium is 60 weight %; In the magnesium, the content of magnesium 〉=99.8 weight %; In the aluminium, the content of aluminium 〉=99.7 weight %.
Earlier aluminium ingot is dropped in the smelting furnace, make it be fused into molten aluminium.
Molten aluminium is superheated to 800 ℃ again, and silica flour is joined in the molten aluminium with carrier gas; Afterwards, add copper cover aluminum alloy pig and magnesium ingot successively, and stirred 15 minutes, obtain blend melt.Carrier gas wherein is a pressurized air.
Afterwards, the temperature of blend melt is adjusted to 760 ℃, to blend melt refining 25 minutes, and remove the liquid level scum silica frost, finish refining for the first time by blowing argon gas in the stove.
Afterwards, the blend melt temperature after the refining first time is adjusted to 760 ℃, and add master alloy aluminium strontium, and stirred the processing of going bad 10 minutes according to the ratio of 0.4 weight % of aluminium.Afterwards,, and remove removing dross, finish refining for the second time the rotten blend melt blowing argon gas refining of handling of process 10 minutes.
At last, by online argon gas refining and twin-stage ceramic filter, will be cast into the high-silicon alloy rod through the purified blend melt second time.
Wherein: in the aluminium strontium, strontium is 10 weight %, and aluminium is 90 weight %; Described carrier gas is a pressurized air; The purity of described argon gas 〉=99.99%; Described twin-stage ceramic filter is respectively 30 orders and 50 purpose screen plates.

Claims (6)

1. method of producing silumin is characterized in that containing the raw material of following parts by weight:
Silica flour 10.5~11.2%;
Copper cover aluminum alloy 2.2~2.7%;
Magnesium 0.2~0.5%;
Aluminium 85.6~87.1%; Wherein:
In the silica flour, the weight content of silicon 〉=98.5%;
In the copper cover aluminum alloy, copper is 30~40 weight %, and aluminium is 60~70 weight %;
In the magnesium, the content of magnesium 〉=99.8 weight %;
In the aluminium, the content of aluminium 〉=99.7 weight %;
Earlier aluminium is dropped in the smelting furnace, make it be fused into molten aluminium;
Molten aluminium is superheated to 760~800 ℃ again, and silica flour is joined in the molten aluminium with carrier gas; Afterwards, add copper cover aluminum alloy and magnesium successively, and stirred 10~15 minutes, obtain blend melt; Carrier gas wherein is pressurized air or argon gas;
Afterwards, the temperature of blend melt is adjusted to 740~760 ℃, to blend melt refining 20~25 minutes, and remove the liquid level scum silica frost, finish refining for the first time by blowing argon gas in the stove;
Afterwards, the blend melt temperature after the refining first time is adjusted to 720~760 ℃, and add master alloy aluminium strontium, and stirred the processing of going bad 8~10 minutes according to the ratio of the 0.2 weight %~0.4 weight % of aluminium; Afterwards,, and remove removing dross, finish refining for the second time the rotten blend melt blowing argon gas refining of handling of process 8~10 minutes; In the described aluminium strontium, strontium is 10 weight %, and aluminium is 90 weight %;
At last, by online argon gas refining and twin-stage ceramic filter, will be cast into the high-silicon alloy rod through the purified blend melt second time.
2. according to the method for the described production silumin of claim 1, it is characterized in that copper cover aluminum alloy, magnesium and aluminium are respectively copper cover aluminum alloy pig, magnesium ingot and aluminium ingot.
3. according to the method for the described production silumin of claim 1, it is characterized in that in the aluminium: the content of iron is less than 0.5%; The content of manganese is less than 0.1%; The content of zinc is less than 0.3%; The content of nickel is less than 0.3%.
4. according to the method for the described production silumin of claim 1, it is characterized in that the granularity≤5mm of silica flour.
5. according to the method for the described production silumin of claim 1, it is characterized in that purity of argon 〉=99.99%.
6. according to the method for the described production silumin of claim 1, it is characterized in that described twin-stage ceramic filter is 30 orders and 50 purpose screen plates.
CN200810019205A 2008-01-16 2008-01-16 Method for preparing high-silicon aluminum alloy CN100577835C (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102477505A (en) * 2010-11-30 2012-05-30 上海万泰铝业有限公司 Aluminium alloy doped with strontium element and manufacturing method thereof
CN102485927A (en) * 2010-12-01 2012-06-06 上海万泰铝业有限公司 Strontium doped Al-Si-Cu alloy and manufacture method thereof

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CN102505075A (en) * 2011-12-23 2012-06-20 安徽绿能技术研究院 Method of producing copper alloy by utilizing copper clad aluminum scrap
FR2990727B1 (en) * 2012-05-21 2014-05-16 Peugeot Citroen Automobiles Sa CYLINDER SHIRT AND CYLINDER BLOCK
CN102876910B (en) * 2012-09-29 2014-01-01 北京科技大学 High-silicon aluminum alloy production method
CN102899539B (en) * 2012-11-07 2015-03-18 南京宁铁有色合金科技开发有限公司 High-plasticity aluminum-silicon alloy for die casting and preparation method thereof
CN103146962B (en) * 2013-03-26 2016-01-27 湖南大学 Body of a motor car high-perforance compression casting aluminium alloy and preparation method thereof
CN103740958B (en) * 2014-01-09 2016-05-25 佛山市深达美特种铝合金有限公司 A kind of 4032 aluminium alloys and Modification Manners thereof
CN104390828A (en) * 2014-12-12 2015-03-04 西南铝业(集团)有限责任公司 Preparation method of AHS aluminum alloy spectrum standard sample
CN105671379A (en) * 2016-03-10 2016-06-15 徐杰 High-silicon aluminum alloy cylinder jacket material and preparation method thereof
CN106399769A (en) * 2016-08-31 2017-02-15 李芹 High silicon aluminum alloy and preparation method thereof
CN108149168A (en) * 2016-12-05 2018-06-12 宜兴市零零七机械科技有限公司 A kind of improved casting material
CN106929700A (en) * 2017-03-14 2017-07-07 宁夏维尔铸造有限责任公司 Aluminum alloy smelting method
CN107460352B (en) * 2017-08-09 2019-02-19 江苏亚太轻合金科技股份有限公司 A kind of silumin Modification Manners
CN107671259A (en) * 2017-09-29 2018-02-09 安徽金兰压铸有限公司 Aluminum alloy junction component dispersion-strengtherning pressure casting method
CN111549257B (en) * 2020-06-03 2021-02-23 佛山市桂源锌合金材料有限公司 Zinc alloy with low cost and good tensile strength and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102477505A (en) * 2010-11-30 2012-05-30 上海万泰铝业有限公司 Aluminium alloy doped with strontium element and manufacturing method thereof
CN102485927A (en) * 2010-12-01 2012-06-06 上海万泰铝业有限公司 Strontium doped Al-Si-Cu alloy and manufacture method thereof

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