CN102952957A - Grain refiner and application of grain refiner in aluminum alloy wheel hub - Google Patents
Grain refiner and application of grain refiner in aluminum alloy wheel hub Download PDFInfo
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- CN102952957A CN102952957A CN201110252277XA CN201110252277A CN102952957A CN 102952957 A CN102952957 A CN 102952957A CN 201110252277X A CN201110252277X A CN 201110252277XA CN 201110252277 A CN201110252277 A CN 201110252277A CN 102952957 A CN102952957 A CN 102952957A
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Abstract
The invention relates to a grain refiner and an application of the grain refiner in an aluminum alloy wheel hub. The grain refiner is characterized by being prepared through the following steps: (1) preparing powdery Al, Ti and B participating in the reaction according to mass percents of 65-75%, 15-30% and 5-10%; (2) smelting an aluminum ingot containing 6.5-7.5% of silicon and 0.3-0.45% of magnesium, adding a covering agent and a refining agent, degassing and stewing to obtain a matrix alloy fused mass; and (3) putting reaction blocks in an electromagnetic induction furnace for heating and drying, pressing the reaction blocks into the fused mass according to 5-10% by mass of the matrix melt through an immersion bell in batches, keeping the temperature for 20 min to perform thermal explosion synthetic reaction on the reaction blocks in the fused mass so as to crack and disperse the reaction blocks due to strong heat release, and mechanically stirring the fused mass to completely dilute the synthetic product and disperse the synthetic product in the aluminum fused mass. The solution and diffusion periods of the TiAl3 phase of the aluminum alloy solution prepared by the method are greatly reduced, the dispersibility of the TiB2 particles is greatly improved to facilitate the refining function, and the size of the casting crystalline grain of an intermediate alloy can be effectively controlled to be lower than 40 microns.
Description
Technical field
The present invention relates to a kind of grain-refining agent and the application in aluminium alloy wheel hub, belong to the metallic substance technical field.Utilize the grain-refining agent of preparation can make aluminum grain refinement, and its intensity and toughness are significantly improved.
Background technology
Aluminium alloy is because the characteristics such as light weight, specific tenacity height, rotproofness, electrical and thermal conductivity performance are good, easy processing are widely used in the fields such as machinery, aerospace, automobile.But because its alloy forms thick grain structure easily under casting condition, realize its widespread use, must improve its as-cast structure, and then promote its performance.At present, in the aluminium alloy industrial production, generally adopt the method for adding the Al-Ti-B master alloy in the melt reaching the purpose of grain refining, and the villiaumite reaction method is generally adopted in the preparation of Al-Ti-B master alloy both at home and abroad.Although this master alloy can have certain thinning effect to aluminium alloy, the preparation cycle of this master alloy is long, and energy consumption is large, and the oxidization burning loss of metal is serious, the intermetallic compound TiAl of alloy structure
3Particle is generally thicker, size all more than 80 μ m, the time of response of having strengthened master alloy.And TiB
2Particle accumulation group's bad dispersibility makes the detailed performance of master alloy not reach desirable effect.
Summary of the invention
The object of the invention is to: a kind of grain-refining agent and the application method in aluminium alloy wheel hub are provided.The present invention can shorten the reaction preparation time greatly, reduces the oxidization burning loss of molten aluminium, and the TiAl in the master alloy as-cast structure
3Be the fine particle shape, size is below 40 μ m, and size evenly, and distribution situation is good, thereby improves the grain refining efficiency of Al-Ti-B master alloy.The aluminium alloy wheel hub of the aluminum alloy melt production of this fining agent refinement of process can improve its tensile strength and anti-fatigue performance comprehensively.
The present invention is achieved in the following ways:
(1) preparation of reaction block: Powdered Al, Ti, the B difference 65-75% by mass percentage that will participate in reaction, 15-30%, the proportioning of 5-10% is prepared burden, ball milling is squeezed into base after mixing, then pressed compact is placed the vacuum reaction stove to be preheated to about 1000K, reaction continues to be incubated 20min after 30 seconds, is cooled to subsequently room temperature and pressed compact is heated to 450-460 ℃ again, is squeezed into reaction block at 15: 1 by extrusion ratio;
(2) melting of matrix alloy: the aluminium ingot of siliceous 6.5-7.5%, magnesium 0.3-0.45% is melted under 720-750 ℃ temperature, add insulating covering agent, refining agent, degasification, leave standstill and obtain the matrix alloy melt;
(3) injection of reaction block: reaction block is put into electromagnetic induction furnace carry out heat drying, and in 30 minutes, reaction block is preheated to 200 ℃--300 ℃ and be incubated 1 hour; Then be pressed into bell jar in 750 ℃ the melt by the 5-10% (mass percent) of matrix liquation in batches, insulation 20min, reaction block carries out the thermal explosion building-up reactions in melt, and strong heat release causes the reaction block cracking, disperses.Again above-mentioned melt is carried out mechanical stirring, churning time 5-10min, rotating speed 80-100 rev/min.Synthetic product is diluted fully, be scattered in the molten aluminium.Through the aluminum alloy melt of the method preparation, TiAl
3Dissolving and the diffusion time of phase are reduced TiB greatly
2Dispersion of particles increases substantially, and is conducive to the performance of its refining effect, and as-cast grain size can be effectively controlled;
(4) casting: at first with mold heated to 250-300 ℃, then adjust the temperature of melt to 720-750 ℃, metal hydraulic progressive die tool, obtain wheel hub blank with the pressure of 0.1-0.15MPa after the cooling.
Embodiment
Embodiment 1:
(1) preparation of reaction block: Powdered Al, Ti, the B that will participate in reaction respectively by mass percentage 75%, 15%, 10% proportioning is prepared burden, ball milling is squeezed into base after mixing, then pressed compact is placed the vacuum reaction stove to be preheated to about 1000K, reaction continues to be incubated 20min after 30 seconds, is cooled to subsequently room temperature and pressed compact is heated to 460 ℃ again, is squeezed into reaction block at 15: 1 by extrusion ratio;
(2) melting of matrix alloy: aluminium ingot siliceous 6.5%, magnesium 0.45% is melted under 740 ℃ temperature, add insulating covering agent, refining agent, degasification, leave standstill and obtain the matrix alloy melt;
(3) injection of reaction block: reaction block is put into electromagnetic induction furnace carry out heat drying, and in 30 minutes, reaction block is preheated to 250 ℃ and be incubated 1 hour; Then be pressed into bell jar in 750 ℃ the melt by 8% (mass percent) of matrix liquation in batches, insulation 20min, reaction block carries out the thermal explosion building-up reactions in melt, and strong heat release causes the reaction block cracking, disperses.Again above-mentioned melt is carried out mechanical stirring, churning time 10min, 80 rev/mins of rotating speeds, it is stand-by to leave standstill 5min after the stirring;
(4) casting: at first with mold heated to 260 ℃, then adjust the temperature to 750 ℃ of melt, metal hydraulic progressive die tool, obtain wheel hub blank with the pressure of 0.15MPa after the cooling.
Embodiment 2:
(1) preparation of reaction block: Powdered Al, Ti, the B that will participate in reaction respectively by mass percentage 65%, 25%, 10% proportioning is prepared burden, ball milling is squeezed into base after mixing, then pressed compact is placed the vacuum reaction stove to be preheated to about 1000K, reaction continues to be incubated 20min after 30 seconds, is cooled to subsequently room temperature and pressed compact is heated to 450 ℃ again, is squeezed into reaction block at 15: 1 by extrusion ratio;
(2) melting of matrix alloy: aluminium ingot siliceous 7.0%, magnesium 0.35% is melted under 750 ℃ temperature, add insulating covering agent, refining agent, degasification, leave standstill and obtain the matrix alloy melt;
(3) injection of reaction block: reaction block is put into electromagnetic induction furnace carry out heat drying, and in 30 minutes, reaction block is preheated to 300 ℃ and be incubated 1 hour; Then be pressed into bell jar in 750 ℃ the melt by 10% (mass percent) of matrix liquation in batches, insulation 20min, reaction block carries out the thermal explosion building-up reactions in melt, strong heat release causes the reaction block cracking, disperses, again above-mentioned melt is carried out mechanical stirring, churning time 8min, 100 rev/mins of rotating speeds, it is stand-by to leave standstill 10min after the stirring;
(4) casting: at first with mold heated to 250 ℃, then adjust the temperature to 740 ℃ of melt, metal hydraulic progressive die tool, obtain wheel hub blank with the pressure of 0.15MPa after the cooling.
Claims (3)
1. a grain-refining agent and the application in aluminium alloy wheel hub, it is characterized in that: the present invention is achieved in the following ways:
(1) preparation of reaction block: Powdered Al, Ti, the B difference 65-75% by mass percentage that will participate in reaction, 15-30%, the proportioning of 5-10% is prepared burden, ball milling is squeezed into base after mixing, then pressed compact is placed the vacuum reaction stove to be preheated to about 1000K, reaction continues to be incubated 20min after 30 seconds, is cooled to subsequently room temperature and pressed compact is heated to 450-460 ℃ again, is squeezed into reaction block at 15: 1 by extrusion ratio;
(2) melting of matrix alloy: the aluminium ingot of siliceous 6.5-7.5%, magnesium 0.3-0.45% is melted under 720-750 ℃ temperature, add insulating covering agent, refining agent, degasification, leave standstill and obtain the matrix alloy melt;
(3) injection of reaction block: reaction block is put into electromagnetic induction furnace carry out heat drying, and in 30 minutes, reaction block is preheated to 200 ℃--300 ℃ and be incubated 1 hour; Then be pressed into bell jar in 750 ℃ the melt by the 5-10% (mass percent) of matrix liquation in batches, insulation 20min, reaction block carries out the thermal explosion building-up reactions in melt, strong heat release causes the reaction block cracking, disperses, and more above-mentioned melt is carried out mechanical stirring, churning time 5-10min, rotating speed 80-100 rev/min, synthetic product is diluted fully, be scattered in the molten aluminium, through the aluminum alloy melt of the method preparation, TiAl
3Dissolving and the diffusion time of phase are reduced TiB greatly
2Dispersion of particles increases substantially, and is conducive to the performance of its refining effect, and as-cast grain size can be effectively controlled;
(4) casting: at first with mold heated to 250-300 ℃, then adjust the temperature of melt to 720-750 ℃, metal hydraulic progressive die tool, obtain wheel hub blank with the pressure of 0.1-0.15MPa after the cooling.
2. according to a kind of grain-refining agent claimed in claim 1 and the application in aluminium alloy wheel hub, it is characterized in that: the preparation of reaction block: Powdered Al, Ti, the B difference 65-75% by mass percentage that will participate in reaction, 15-30%, the proportioning of 5-10% is prepared burden.
3. according to a kind of grain-refining agent claimed in claim 1 and the application in aluminium alloy wheel hub, it is characterized in that: reaction block is pressed in batches with bell jar by the 5-10% (mass percent) of base aluminum liquation in 750 ℃ the molten aluminium, insulation 20min, reaction block carries out the thermal explosion building-up reactions in melt, strong heat release causes the reaction block cracking, disperses.
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| CN201110252277XA CN102952957A (en) | 2011-08-25 | 2011-08-25 | Grain refiner and application of grain refiner in aluminum alloy wheel hub |
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| CN201110252277XA CN102952957A (en) | 2011-08-25 | 2011-08-25 | Grain refiner and application of grain refiner in aluminum alloy wheel hub |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328300A (en) * | 2014-11-14 | 2015-02-04 | 中北大学 | Preparation method and application method of refiner for waste aluminum ring-pull can alloy |
| RU2555321C2 (en) * | 2013-06-26 | 2015-07-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Самарский государственный технический университет | Method of production of cast aluminium-matrix composite alloy |
| CN104789829A (en) * | 2014-05-30 | 2015-07-22 | 安徽鑫发铝业有限公司 | Aluminum alloy section sprayed with wood grain |
| CN104818398A (en) * | 2015-03-23 | 2015-08-05 | 芜湖黄燕实业有限公司 | Aluminum alloy for wheel hub and preparation method thereof, and aluminum alloy wheel hub |
| CN104946920A (en) * | 2015-06-17 | 2015-09-30 | 广东省工业技术研究院(广州有色金属研究院) | Preparation method of grain refiner |
| CN104946938A (en) * | 2015-07-08 | 2015-09-30 | 济南大学 | Preparation method of Al-Ti-B-Y intermediate alloy and application thereof |
| CN106319263A (en) * | 2016-11-03 | 2017-01-11 | 四川大学 | Aluminum titanium carbonitride alloy grain refiner and preparation method thereof |
| CN106676298A (en) * | 2016-12-26 | 2017-05-17 | 广东迪生力汽配股份有限公司 | Grain refinement method for aluminum alloy hub |
| CN108290210A (en) * | 2015-11-02 | 2018-07-17 | 慕贝尔性能车轮有限公司 | Method for manufacturing light metal casting component and light metal casting component |
| CN109777989A (en) * | 2019-03-21 | 2019-05-21 | 孟静 | The production method of aluminum alloy doors and windows |
| CN109852836A (en) * | 2019-03-21 | 2019-06-07 | 孟静 | Aluminium alloy castings preparation method |
| CN112301243A (en) * | 2020-09-21 | 2021-02-02 | 中国科学院金属研究所 | Efficient aluminum and aluminum alloy grain refining method |
| RU2742874C1 (en) * | 2020-08-10 | 2021-02-11 | Федеральное государственное бюджетное учреждение науки Институт химии твердого тела Уральского отделения Российской академии наук | Method of obtaining a composite material based on aluminium or its alloy doped with titanium |
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| JPH10204555A (en) * | 1997-01-17 | 1998-08-04 | Toyota Motor Corp | Production of grain refiner for casting aluminum alloy |
| CN1651585A (en) * | 2005-03-03 | 2005-08-10 | 上海交通大学 | Crystal grain partitioning agent of Mg-Al series magnesium alloy |
| CN101758204A (en) * | 2008-11-12 | 2010-06-30 | 郑东海 | Process for smelting and gravity casting of aluminum alloy wheel hub |
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| JPH10204555A (en) * | 1997-01-17 | 1998-08-04 | Toyota Motor Corp | Production of grain refiner for casting aluminum alloy |
| CN1651585A (en) * | 2005-03-03 | 2005-08-10 | 上海交通大学 | Crystal grain partitioning agent of Mg-Al series magnesium alloy |
| CN101758204A (en) * | 2008-11-12 | 2010-06-30 | 郑东海 | Process for smelting and gravity casting of aluminum alloy wheel hub |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2555321C2 (en) * | 2013-06-26 | 2015-07-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Самарский государственный технический университет | Method of production of cast aluminium-matrix composite alloy |
| CN104789829A (en) * | 2014-05-30 | 2015-07-22 | 安徽鑫发铝业有限公司 | Aluminum alloy section sprayed with wood grain |
| CN104328300A (en) * | 2014-11-14 | 2015-02-04 | 中北大学 | Preparation method and application method of refiner for waste aluminum ring-pull can alloy |
| CN104818398A (en) * | 2015-03-23 | 2015-08-05 | 芜湖黄燕实业有限公司 | Aluminum alloy for wheel hub and preparation method thereof, and aluminum alloy wheel hub |
| CN104946920A (en) * | 2015-06-17 | 2015-09-30 | 广东省工业技术研究院(广州有色金属研究院) | Preparation method of grain refiner |
| CN104946938A (en) * | 2015-07-08 | 2015-09-30 | 济南大学 | Preparation method of Al-Ti-B-Y intermediate alloy and application thereof |
| CN108290210A (en) * | 2015-11-02 | 2018-07-17 | 慕贝尔性能车轮有限公司 | Method for manufacturing light metal casting component and light metal casting component |
| CN106319263A (en) * | 2016-11-03 | 2017-01-11 | 四川大学 | Aluminum titanium carbonitride alloy grain refiner and preparation method thereof |
| CN106676298A (en) * | 2016-12-26 | 2017-05-17 | 广东迪生力汽配股份有限公司 | Grain refinement method for aluminum alloy hub |
| CN109777989A (en) * | 2019-03-21 | 2019-05-21 | 孟静 | The production method of aluminum alloy doors and windows |
| CN109852836A (en) * | 2019-03-21 | 2019-06-07 | 孟静 | Aluminium alloy castings preparation method |
| RU2742874C1 (en) * | 2020-08-10 | 2021-02-11 | Федеральное государственное бюджетное учреждение науки Институт химии твердого тела Уральского отделения Российской академии наук | Method of obtaining a composite material based on aluminium or its alloy doped with titanium |
| CN112301243A (en) * | 2020-09-21 | 2021-02-02 | 中国科学院金属研究所 | Efficient aluminum and aluminum alloy grain refining method |
| CN112301243B (en) * | 2020-09-21 | 2022-02-18 | 中国科学院金属研究所 | Efficient aluminum and aluminum alloy grain refining method |
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Application publication date: 20130306 |