CN103074510B - Refining method of aluminum-magnesium-series cast aluminum alloy material - Google Patents
Refining method of aluminum-magnesium-series cast aluminum alloy material Download PDFInfo
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- CN103074510B CN103074510B CN201310040899.5A CN201310040899A CN103074510B CN 103074510 B CN103074510 B CN 103074510B CN 201310040899 A CN201310040899 A CN 201310040899A CN 103074510 B CN103074510 B CN 103074510B
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Abstract
The invention relates to a refining method of an aluminum-magnesium-series cast aluminum alloy material. In the method, a novel covering agent is selected for performing surface protection on an aluminum-magnesium-series alloy in a smelting process, a refining agent special for a magnesium-aluminum alloy is prepared simultaneously for refining a melt, and the smelting temperature and the pouring temperature are controlled, so that an aluminum-magnesium-series cast aluminum alloy with higher performance and a low magnesium burnout rate is obtained. According to the method, the novel covering agent and the special refining agent are applied for smelting an Al-Mg-series alloy (the content of Mg is 3-10 percent) under the control of a specific production process, so that the burnout of magnesium is controlled effectively, the production cost is saved, the cleanliness of the alloy is enhanced, and the porosity of the alloy is lowered.
Description
Technical field
The invention belongs to metal material field, especially a kind of method of refining of high purity alumina-magnesia cast aluminium alloy material.
Background technology
Aluminum magnesium alloy is a kind of widely used alloy, and it is the class alloy that in existing aluminium alloy, proportion is minimum, corrosion resistance is the strongest, is that one is not heat-treated and can be had some strength and the good alloy of Toughness Ratio yet.Aluminum magnesium alloy is in fusion process, because the chemical property of magnesium is active, cause the oxidation of alloy, burning phenomenon very serious, not only reduce the casting yield of magnesium in alloy, and causing huge financial loss, the oxidizing fire therefore solving aluminum magnesium alloy is one of key of aluminum magnesium alloy extensive application from now on.
Metal oxidation resistance ability depends on that surface film hinders the ability passed through of reactive material, that is depends on the density coefficient of surface film.Magnesium liquid exposes and can generate magnesium oxide by rapid oxidation in an atmosphere, becomes porous open texture, and will produce tension stress at metal bath surface, make bottom oxidation occur further and burn, and too increases the air-breathing tendency of melt.Like this except the sharp increase causing production cost, also become the main source of foundry goods impurity, and increase bleb rate.As caught up with without adequate measures, its destruction produced will cause beyond measure loss.
Through the accumulation of long-term practical experience, the measure that the protection question of aluminium-magnesium alloy melt can be taked is many-sided, mainly carries out round following several respects:
(1) be covered on melt with saline flux;
(2) under reaction atmosphere, process melt, form thin protective membrane thereon;
(3) process melt under inert gas atmosphere;
(4) be added on melt as tectum using inhibition element.
Although smelting aluminum-magnesium alloy means of defence is numerous, all there is many defects, extensive alloy production demand can not be met.
By retrieval, not yet find the patent document relevant to present patent application.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, a kind of method of refining of high purity alumina-magnesia cast aluminium alloy material is provided, present method is by application HGF-1 type insulating covering agent and XH-2 type refining agent, under specific controlling of production process, Al-Mg system alloy (Mg content is 3 ~ 10%) is founded, effectively controls the scaling loss of magnesium, saved production cost, improve the cleanliness factor of alloy, reduce the porosity of alloy.
The object of the invention is to be achieved through the following technical solutions:
A method of refining for high purity alumina-magnesia cast aluminium alloy material, step is as follows:
(1) take other metallic substance required in the remelted aluminum ingot of aequum, MAGNESIUM METAL and alloy by alloy requirement, and thermal pretreatment is carried out to all material;
(2) take the special refining agent of high-magnesium aluminum alloy by the 0.1 ~ 0.2wt% always fed intake, according to bath surface area by 0.5 ~ 0.8kg/m
2take novel aluminum magnesium alloy covering agent, and drying treatment is carried out to all flux;
(3) add in smelting furnace step (1) in preheated remelted aluminum ingot and other metallic substance required, and to heat up with body of heater;
(4) after heat fused, add preheated other master alloys required as required, Melt Stirring is even, and adjustment melt temperature 740 ~ 760 DEG C, bottom load weighted MAGNESIUM METAL press-in aluminium liquid, until melt completely;
(5) adjust temperature of aluminum liquid 730 ~ 750 DEG C, by step (2) in complete drying insulating covering agent 75% be sprinkled in melt, after it becomes molten state fully to cover, add step (2) in the refining agent that takes;
(6) adjust inert gas flow, carry out degasification slagging-off, 10 ~ 15 minutes degasification time, after degasification completes, bypass surface dopant, after clawing aluminium liquid surface scum, add step (5) in remaining insulating covering agent;
(7) aluminium alloy melt leaves standstill 5 ~ 10 minutes, comes out of the stove when melt temperature 700 ~ 720 DEG C.
And described rare gas element is argon gas.
Advantage of the present invention and beneficial effect are:
1, the present invention has selected a kind of novel insulating covering agent in fusion process, to carry out surface protection to high purity alumina-magnesia alloy; the refining agent being simultaneously equipped with magnalium special carries out refining to melt; and control smelting temperature and teeming temperature, obtain the high purity alumina-magnesia cast aluminium alloy that performance is higher, magnesium burn out rate is low.
2, the present invention uses novel insulating covering agent, effectively reduce the oxidizing fire of magnesium in high-magnesium aluminum alloy melting process, especially the scaling loss of magnesium elements in long insulating process, improves the casting yield of magnesium elements in aluminum magnesium alloy generative process, greatly reduces manufacturing cost.
3, another outstanding advantages that in the present invention, novel insulating covering agent uses is, its the suction hydrogen that greatly can reduce melt that adds is inclined to, and in order to ensure casting yield and the alloy flowability of magnesium elements in prior art, what add that magnesium temperature needs control is higher, and temperature is high causes aluminium alloy melt very easily air-breathing.
4, the present invention selects high-magnesium aluminum alloy HGF-1 type refining agent obviously to strengthen melt slagging-off degassing effect, improves the cleanliness factor of melt.
5, the application is by the conservative control adding magnesium temperature and teeming temperature, further ensures the casting yield of magnesium elements and the final quality of alloy cast ingot.
Accompanying drawing illustrates:
Fig. 1 gives the scaling loss situation contrast of magnesium elements in the LZ.AlMg9 alloy melting process of Mg content requirement 8% ~ 10.5%;
Fig. 2 gives the scaling loss situation contrast of magnesium elements in the LHM.GIBBS alloy melting process of Mg content requirement 2.9% ~ 3.4%.
Embodiment
Below by specific embodiment, the invention will be further described, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
The per-cent below related to all is weight percentage, except specified otherwise.
The special refining agent of the high-magnesium aluminum alloy that following examples use is the HGF-1 type flux that upper marine rainbow light metal flux factory produces, the XH-2 type flux that the novel aluminum magnesium alloy covering agent used is produced for Xu Hui Aluminum company limited of Xuzhou City.But be not limited to above-mentioned two kinds, the special refining agent of high-magnesium aluminum alloy general in industry and novel aluminum magnesium alloy covering agent.
A method of refining for high purity alumina-magnesia cast aluminium alloy material, order is: add 75% novel insulating covering agent-Jia refining agent-degasification-novel insulating covering agent of-Jia 25% of skimming.
(1) take other metallic substance required in the remelted aluminum ingot of aequum, MAGNESIUM METAL and alloy by alloy requirement, and thermal pretreatment is carried out to all material.
(2) take high-magnesium aluminum alloy HGF-1 type refining agent by the 0.1 ~ 0.2wt% always fed intake, according to bath surface area by 0.5 ~ 0.8kg/m
2take aluminum magnesium alloy XH-2 type insulating covering agent, and drying treatment is carried out to all flux.
(3) add in smelting furnace step (1) in preheated remelted aluminum ingot and other metallic substance required (Pure Silicon Metal, manganese metal etc.), and to heat up with body of heater.
(4) after heat fused, add preheated other master alloys required (aluminium titanium master alloy, ferro-aluminum master alloy etc.) as required, Melt Stirring is even, and adjustment melt temperature 740 ~ 760 DEG C, bottom load weighted MAGNESIUM METAL press-in aluminium liquid, until melt completely;
(5) adjust temperature of aluminum liquid 730 ~ 750 DEG C, by step (2) in complete drying insulating covering agent 75% be sprinkled in melt, after it becomes molten state fully to cover, add step (2) in the refining agent that takes;
(6) adjust rare gas element (argon gas) flow, carry out degasification slagging-off, 10 ~ 15 minutes degasification time, after degasification completes, bypass surface dopant, after clawing aluminium liquid surface scum, add step (5) in remaining insulating covering agent;
(7) aluminium alloy melt leaves standstill 5 ~ 10 minutes, comes out of the stove when melt temperature 700 ~ 720 DEG C.
The present invention illustrates this process for purification for LZ.AlMg9 alloy and LHM.GIBBS alloy.
Embodiment 1
A method of refining for high purity alumina-magnesia cast aluminium alloy material, prepared by the present embodiment is LZ.AlMg9 alloy, and step is as follows:
(1) total batching is 80Kg, by alloying constituent requirement (Si:1.0 ~ 1.5; Mg:8.0 ~ 10.5; Al is surplus) take the MAGNESIUM METAL 7.76Kg of aequum, Pure Silicon Metal 1Kg, remelted aluminum ingot 71.24Kg, and thermal pretreatment is carried out to all material.
(2) take high-magnesium aluminum alloy HGF-1 type refining agent 0.12Kg, take aluminum magnesium alloy XH-2 type insulating covering agent 0.14Kg, and symmetrical measured all flux carries out drying treatment.
In industrial furnace order add step (1) in preheated remelted aluminum ingot, Pure Silicon Metal, and to heat up with body of heater.
(4) after heat fused, Melt Stirring is even, adjustment melt temperature 755 DEG C, bottom load weighted MAGNESIUM METAL press-in aluminium liquid, until melt completely.
(5) adjust temperature of aluminum liquid 740 DEG C, by step (2) in complete drying insulating covering agent 75% be sprinkled in melt, after it becomes molten state fully to cover, add step (2) in the refining agent that takes.
(6) adjust argon flow amount, carry out degasification slagging-off, the degasification time is 12 minutes, after degasification completes, and bypasses bath surface insulating covering agent, after clawing aluminium liquid surface scum, add step (5) in remaining insulating covering agent.
(7) aluminium alloy melt leaves standstill 8 minutes, comes out of the stove when melt temperature 715 DEG C.
In simulation actual production, the time of coming out of the stove is 150 minutes, timing from first piece of sample of cast, every cast in 30 minutes one piece of sample, pour into a mould six pieces, the large ingot of sample altogether, the Mg content in test samples, the casting yield of first piece of sample Mg is up to 98.9%, the casting yield of last block sample is 97.2%, greatly reduce the scaling loss of Mg element, fracture surface of sample is clean without being mingled with, and the Cast hole of six pieces of samples is one-level entirely.
Embodiment 2
A method of refining for high purity alumina-magnesia cast aluminium alloy material, prepared by the present embodiment is LHM.GIBBS alloy, and step is as follows:
(1) total batching is 80Kg, by alloying constituent requirement (Si:0.2 ~ 0.3; Mg:2.6 ~ 3.7; Fe:0.2 ~ 0.5; Mn:0.6 ~ 0.75; Ti:0.03 ~ 0.07; Al is surplus) take the MAGNESIUM METAL 2.8Kg of aequum, Pure Silicon Metal 0.2Kg, ferro-aluminum master alloy 3.2Kg, aluminium manganese master alloy 5.6Kg, aluminium titanium master alloy 0.4Kg, remelted aluminum ingot 67.8Kg.And thermal pretreatment is carried out to all material.
(2) take high-magnesium aluminum alloy HGF-1 type refining agent 0.10Kg, take aluminum magnesium alloy XH-2 type insulating covering agent 0.12Kg, and symmetrical measured all flux carries out drying treatment.
In industrial furnace order add step (1) in preheated remelted aluminum ingot, Pure Silicon Metal, and to heat up with body of heater.
(4) after heat fused, Melt Stirring is even, add preheated aluminium manganese master alloy, aluminium titanium master alloy, ferro-aluminum master alloy, adjustment melt temperature 750 DEG C, bottom load weighted MAGNESIUM METAL press-in aluminium liquid, until melt completely.
(5) adjust temperature of aluminum liquid 745 DEG C, by step (2) in complete drying insulating covering agent 75% be sprinkled in melt, after it becomes molten state fully to cover, add step (2) in the refining agent that takes.
(6) adjust argon flow amount, carry out degasification slagging-off, the degasification time is 10 minutes.After degasification completes, bypass bath surface insulating covering agent, after clawing aluminium liquid surface scum, add step (5) in remaining insulating covering agent.
(7) aluminium alloy melt leaves standstill 6 minutes, comes out of the stove when melt temperature 700 DEG C.
In simulation actual production, the time of coming out of the stove is 150 minutes, timing from first piece of sample of cast, every cast in 30 minutes one piece of sample, pour into a mould six pieces, the large ingot of sample altogether, the Mg content in test samples, the casting yield of first piece of sample Mg is up to 99.7%, the casting yield of last block sample is 98.0%, greatly reduce the scaling loss of Mg element, fracture surface of sample is clean without being mingled with, and the Cast hole of six pieces of samples is one-level entirely.
Claims (2)
1. a method of refining for high purity alumina-magnesia cast aluminium alloy material, is characterized in that: step is as follows:
(1) total batching is 80Kg, by alloying constituent requirement Si:1.0 ~ 1.5; Mg:8.0 ~ 10.5; Al is surplus, takes the MAGNESIUM METAL 7.76Kg of aequum, Pure Silicon Metal 1Kg, remelted aluminum ingot 71.24Kg, and carries out thermal pretreatment to all material,
(2) takes high-magnesium aluminum alloy HGF-1 type refining agent 0.12Kg, take aluminum magnesium alloy XH-2 type insulating covering agent 0.14Kg, and symmetrical measured all flux carries out drying treatment,
In industrial furnace order add step (1) in preheated remelted aluminum ingot, Pure Silicon Metal, and to heat up with body of heater,
(4) after heat fused, Melt Stirring is even, adjustment melt temperature 755 DEG C, bottom load weighted MAGNESIUM METAL press-in aluminium liquid, until melt completely,
(5) adjust temperature of aluminum liquid 740 DEG C, by step (2) in complete drying insulating covering agent 75% be sprinkled in melt, after it becomes molten state fully to cover, add step (2) in the refining agent that takes,
(6) adjust argon flow amount, carry out degasification slagging-off, the degasification time is 12 minutes, after degasification completes, and bypasses bath surface insulating covering agent, after clawing aluminium liquid surface scum, add step (5) in remaining insulating covering agent,
(7) aluminium alloy melt leaves standstill 8 minutes, comes out of the stove when melt temperature 715 DEG C,
In simulation actual production, the time of coming out of the stove is 150 minutes, timing from first piece of sample of cast, every cast in 30 minutes one piece of sample, pour into a mould six pieces, the large ingot of sample altogether, the Mg content in test samples, the casting yield of first piece of sample Mg is up to 98.9%, the casting yield of last block sample is 97.2%, greatly reduce the scaling loss of Mg element, fracture surface of sample is clean without being mingled with, and the Cast hole of six pieces of samples is one-level entirely.
2. a method of refining for high purity alumina-magnesia cast aluminium alloy material, is characterized in that: step is as follows:
(1) total batching is 80Kg, by alloying constituent requirement Si:0.2 ~ 0.3; Mg:2.6 ~ 3.7; Fe:0.2 ~ 0.5; Mn:0.6 ~ 0.75; Ti:0.03 ~ 0.07; Al is surplus, takes the MAGNESIUM METAL 2.8Kg of aequum, Pure Silicon Metal 0.2Kg, ferro-aluminum master alloy 3.2Kg, aluminium manganese master alloy 5.6Kg, aluminium titanium master alloy 0.4Kg, remelted aluminum ingot 67.8Kg, and carries out thermal pretreatment to all material,
(2) takes high-magnesium aluminum alloy HGF-1 type refining agent 0.10Kg, take aluminum magnesium alloy XH-2 type insulating covering agent 0.12Kg, and symmetrical measured all flux carries out drying treatment,
In industrial furnace order add step (1) in preheated remelted aluminum ingot, Pure Silicon Metal, and to heat up with body of heater,
(4) after heat fused, Melt Stirring is even, add preheated aluminium manganese master alloy, aluminium titanium master alloy, ferro-aluminum master alloy, adjustment melt temperature 750 DEG C, bottom load weighted MAGNESIUM METAL press-in aluminium liquid, until melt completely,
(5) adjust temperature of aluminum liquid 745 DEG C, by step (2) in complete drying insulating covering agent 75% be sprinkled in melt, after it becomes molten state fully to cover, add step (2) in the refining agent that takes,
(6) adjust argon flow amount, carry out degasification slagging-off, the degasification time is 10 minutes, after degasification completes, and bypasses bath surface insulating covering agent, after clawing aluminium liquid surface scum, add step (5) in remaining insulating covering agent,
(7) aluminium alloy melt leaves standstill 6 minutes, comes out of the stove when melt temperature 700 DEG C.
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| CN106337141B (en) * | 2015-07-14 | 2018-07-20 | 上海帅翼驰铝合金新材料有限公司 | A method of improving ADC6 aluminium alloy ingots performances |
| CN108611504A (en) * | 2016-12-13 | 2018-10-02 | 山东瑞烨法兰有限公司 | A kind of technique using almag leftover bits and pieces bar |
| CN107243602B (en) * | 2017-06-06 | 2019-10-25 | 中山出入境检验检疫局检验检疫技术中心 | Model casting aluminium alloy smelting pouring procedure |
| CN111155003A (en) * | 2020-02-25 | 2020-05-15 | 广西大学 | High-strength high-toughness high-magnesium aluminum alloy and preparation method thereof |
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| CN102266924A (en) * | 2011-07-09 | 2011-12-07 | 中国铝业股份有限公司 | Continuous cast-rolling process for producing 5005 aluminum plastic strip billet |
| CN102644012A (en) * | 2012-05-17 | 2012-08-22 | 天津立中合金集团有限公司 | Preparation method of cocrystallized Al-Si alloy piston material |
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| CN102266924A (en) * | 2011-07-09 | 2011-12-07 | 中国铝业股份有限公司 | Continuous cast-rolling process for producing 5005 aluminum plastic strip billet |
| CN102644012A (en) * | 2012-05-17 | 2012-08-22 | 天津立中合金集团有限公司 | Preparation method of cocrystallized Al-Si alloy piston material |
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Effective date of registration: 20200526 Address after: 300457 No. 58, Tai Tai Road, west end of Binhai New Area, Tianjin Patentee after: Tianjin xinlizhong alloy Group Co., Ltd Address before: 300457 No. 58, Tai Tai Road, west end of Binhai New Area, Tianjin Patentee before: Tianjin Lizhong Alloy Group Co.,Ltd. |