CN203649346U - Melt treatment device for hypereutectic aluminum-silicon alloy continuous casting process - Google Patents
Melt treatment device for hypereutectic aluminum-silicon alloy continuous casting process Download PDFInfo
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- CN203649346U CN203649346U CN201320858744.8U CN201320858744U CN203649346U CN 203649346 U CN203649346 U CN 203649346U CN 201320858744 U CN201320858744 U CN 201320858744U CN 203649346 U CN203649346 U CN 203649346U
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Abstract
The utility model provides a melt treatment device for a hypereutectic aluminum-silicon alloy continuous casting process. The melt treatment device comprises a gas duct, a spraying device, a guide pipe, an electromagnetic stirrer, a crystallizer, a casting ingot, a modifier, a gap channel, spraying holes, an alloy melt and a hot top. The top of the spraying device is communicated with the gas duct, the spraying device is a hollow tubular device, the spraying holes are formed in the bottom side wall of the spraying device, the gap channel is formed between the spraying holes and the inner wall of the guide pipe, the bottom of the guide pipe is mounted on the crystallizer, the electromagnetic stirrer is mounted on the outer side wall of the guide pipe in a sleeving manner, the alloy melt is contained in an inner cavity of the hot top, and the top of the gap channel is communicated with the alloy melt. The melt treatment device has the advantages that primary silicon structure is refined, usage of the modifier is reduced and cost is lowered.
Description
Technical field
The utility model belongs to metal material processing technical field, refers in particular to the melt treatment device in a kind of transcocrystallized Al-Si alloy casting process.
Background technology
Transcocrystallized Al-Si alloy blank, owing to having the advantages such as lightweight, high-strength, high abrasion, high-fire resistance and lower thermal expansivity, is commonly used to manufacture piston of automobile engine, rotor, the critical components such as swash plate.But in transcocrystallized Al-Si alloy microstructure, conventionally there is thick primary silicon and primary silicon segregation phenomenon, seriously reduced the mechanical property of alloy.Under conventional cast, primary silicon is generally all thicker, is five lobe starriness, en plaque, octahedron and other complex topography and corner angle sharp, seriously isolates matrix, the mechanical property and the machinability that have reduced like this transcocrystallized Al-Si alloy, especially plasticity significantly reduces.Therefore improve form and the distribution of primary silicon, the size of refinement primary silicon, reduces its weakening effect to substrate performance, has very important significance for the combination property that improves transcocrystallized Al-Si alloy.
At present, in the casting process of transcocrystallized Al-Si alloy blank, size and the pattern of the normal primary silicon that adopts the rotten method control transcocrystallized Al-Si alloy of processing.Chinese patent 201210042187.2 has been announced the rotten technique of a kind of aluminium alloy, by add intermediate alloy alterant in alloy melt in aluminium alloy smelting process, alterant melts in alloy melt, form the forming core particle that disperse distributes, to the nucleation and growth generation effect of primary silicon, size, pattern and the distribution of the primary silicon in alloy are changed.Column defects under but this modification process exists in the time of continuous casting transcocrystallized Al-Si alloy blank: when (1) alterant uses, bulk or the thread modes of adopting add more, cause the skewness of alterant in melt, often do not reach the effect that disperse distributes, alterant addition is more, utilization rate is low, and modification effect is poor.(2) metamorphic process often carries out in smelting furnace or standing furnace, rotten after until be poured, modification effect easily fails.And alloy melt is longer through distance, rotten forming core particle often bumps in flow process, and forming core particle reduces, and has a strong impact on the modification effect of alterant.(3) although process through rotten, but the transcocrystallized Al-Si alloy continuous casting material primary silicon size and the pattern that obtain do not obtain basic improvement, and primary silicon size is still very large, and average grain size still reaches more than 70 microns, pattern is poor, take lath-shaped as main.Therefore be only difficult to obtain the transcocrystallized Al-Si alloy blank of high-quality by conventional metamorphism treatment method.
Chinese patent 200810239936.4 has been announced a kind of method of quickly preparing hypereutectic Al-Si alloy bar billet at low cost.Under inert gas shielding, transcocrystallized Al-Si alloy is carried out to melting; Under hot conditions, adopt composite inoculating and refining melt; Then melt is carried out to degassing processing; Finally adopt electromagnetic agitation method to carry out quick semi-continuous casting.But there is primary silicon segregation, the inhomogeneous problem of Tissue distribution in this technique, also fail fundamentally to improve the disperse distribution situation of alterant in aluminium alloy melt, the size inequality of primary silicon, pattern is poor.Also mentioned employing electromagnetic agitation and carried out semi-continuous casting, but how the Kelvin effect producing in not mentioned electromagnetic agitation process to avoid, also do not mention the online processing of online alterant in casting process and melt.
Summary of the invention
The purpose of this utility model is to overcome above shortcomings in transcocrystallized Al-Si alloy casting process, and the melt treatment device in a kind of transcocrystallized Al-Si alloy casting process is provided.
For achieving the above object, technical scheme provided by the utility model is: the melt treatment device in a kind of transcocrystallized Al-Si alloy casting process, it includes wireway, dusting device, mozzle, magnetic stirrer, crystallizer, ingot casting, alterant, gap passage, powder injection hole, alloy melt, heat top, wherein, dusting device top is communicated with wireway, dusting device is the tube of hollow, dusting device bottom sidewall is provided with several powder injection holes, between powder injection hole and mozzle inwall, form gap passage, mozzle bottom is arranged on crystallizer, mozzle lateral wall is set with magnetic stirrer, hot top inner chamber fills alloy melt, gap channel roof is communicated with alloy melt.
Described magnetic stirrer is rotary EMS device, travelling-wave electromagnetic agitator, spiral electromagnetic agitator, or the composite electromagnetic agitator of aforementioned agitator composition.
Compared with prior art, the utility model has the advantage of:
The first, powdery or granular alterant produce a large amount of " heterogeneous " forming core particles, as " core " of the crystallization of primary silicon, improve effective nucleation rate of primary silicon, refinement primary silicon, changes the pattern of primary silicon, refinement primary silicon tissue, reduce alterant consumption, reduced cost.
The second, magnetic stirrer and air-flow stir alloy melt, when promoting the quick dispersion-strengtherning of alterant, can promote the homogenising of He Cheng branch, alloy melt temperature field, are very beneficial for obtaining tiny crystal grain.
Three, the impact of the Kelvin effect of electromagnetic field is avoided in the setting of dusting device, and the distribution of electromagnetic field is more even, and He Cheng branch, alloy melt temperature field is also more even.
Four, the method collection rotten-online degasification-in-line purification online, collect physical thinning and superalloy in together with, transcocrystallized Al-Si alloy melt is processed, be conducive to obtain the transcocrystallized Al-Si alloy blank of high-quality.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
The specific embodiment
Below in conjunction with institute's drawings attached, the utility model is described in further detail, preferred embodiment of the present utility model is: referring to accompanying drawing 1, melt treatment device in transcocrystallized Al-Si alloy casting process described in the present embodiment includes wireway 1, dusting device 2, mozzle 3, magnetic stirrer 4, crystallizer 5, ingot casting 6, alterant 7, gap passage 8, powder injection hole 9, alloy melt 10, heat top 11, wherein, the material of dusting device 2 is aluminum silicate insulation material, outer wall is smooth, and outer diameter is 40mm.Mozzle 3 internal diameters are 60mm, and in crystallizer 5, graphite annulus internal diameter is 75mm.Dusting device 2 tops are communicated with wireway 1, and the tube that dusting device 2 is hollow is equipped with AL-P powdery alterant in tube chamber, and the size of powdery alterant is 200 orders.Dusting device 2 bottom sidewalls are provided with several powder injection holes 9, between powder injection hole 9 and mozzle 3 inwalls, form gap passage 8, and passage 8 width in gap are 10mm.Mozzle 3 bottoms are arranged on crystallizer 5, mozzle 3 lateral walls are set with magnetic stirrer 4, heat top 11 inner chambers fill alloy melt 10, passage 8 tops in gap are communicated with alloy melt 10, magnetic stirrer 4 is rotary EMS device, travelling-wave electromagnetic agitator, spiral electromagnetic agitator, or the composite electromagnetic agitator of aforementioned agitator composition.
A390 aluminum alloy blank prepared by such scheme, silicon content is 17.2%.The alterant adopting is In Powdered Aluminium phosphor alterative, and phosphorus content is 4.5%.Before cast, dusting device and alterant are preheating to 300 ℃.When preparation, the A390 aluminium alloy melt of 820 ℃ is imported in heat top, melt flows to crystallizer through gap passage and casts continuously.After casting process is stable, open dusting device, the nitrogen pressure being blown into is 0.05Mpa, and nitrogen flow is 0.1L/min, the powdery alterant amount of being blown into 150g/min.The nominal input power of the magnetic stirrer adopting is 1.2kW, and stirring frequency is 40Hz, and the casting parameters adopting after continuous casting is stable is: casting speed is 300mm/min, and cooling water pressure is 0.35Mpa, and in the passage of gap, melt temperature is 740-780 ℃.Continuous casting finishes to have obtained fine microstructures, the uniform A390 aluminium alloy cast ingot of composition.
The embodiment of the above is only the preferred embodiment of the utility model, not limits practical range of the present utility model with this, therefore the variation that all shapes according to the utility model, principle are done all should be encompassed in protection domain of the present utility model.
Claims (2)
1. the melt treatment device in a transcocrystallized Al-Si alloy casting process, it is characterized in that: it includes wireway (1), dusting device (2), mozzle (3), magnetic stirrer (4), crystallizer (5), ingot casting (6), alterant (7), gap passage (8), powder injection hole (9), alloy melt (10), heat top (11), wherein, dusting device (2) top is communicated with wireway (1), the tube that dusting device (2) is hollow, dusting device (2) bottom sidewall is provided with several powder injection holes (9), between powder injection hole (9) and mozzle (3) inwall, form gap passage (8), mozzle (3) bottom is arranged on crystallizer (5), mozzle (3) lateral wall is set with magnetic stirrer (4), heat top (11) inner chamber fills alloy melt (10), gap passage (8) top is communicated with alloy melt (10).
2. according to the melt treatment device in transcocrystallized Al-Si alloy casting process claimed in claim 1, it is characterized in that: magnetic stirrer (4) is rotary EMS device, travelling-wave electromagnetic agitator, spiral electromagnetic agitator, or the composite electromagnetic agitator of aforementioned agitator composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320858744.8U CN203649346U (en) | 2013-12-25 | 2013-12-25 | Melt treatment device for hypereutectic aluminum-silicon alloy continuous casting process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320858744.8U CN203649346U (en) | 2013-12-25 | 2013-12-25 | Melt treatment device for hypereutectic aluminum-silicon alloy continuous casting process |
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| CN203649346U true CN203649346U (en) | 2014-06-18 |
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| CN201320858744.8U Withdrawn - After Issue CN203649346U (en) | 2013-12-25 | 2013-12-25 | Melt treatment device for hypereutectic aluminum-silicon alloy continuous casting process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736952A (en) * | 2013-12-25 | 2014-04-23 | 湖南文昌科技有限公司 | Melt processing device and method in hypereutectic aluminum silicon alloy continuous casting process |
| CN110538587A (en) * | 2019-09-12 | 2019-12-06 | 福建省鼎智新材料科技有限公司 | Powder spraying semi-solid pulping device based on gas stirring and working method thereof |
-
2013
- 2013-12-25 CN CN201320858744.8U patent/CN203649346U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736952A (en) * | 2013-12-25 | 2014-04-23 | 湖南文昌科技有限公司 | Melt processing device and method in hypereutectic aluminum silicon alloy continuous casting process |
| CN103736952B (en) * | 2013-12-25 | 2016-01-20 | 湖南文昌科技有限公司 | Melt treatment device and method in a kind of transcocrystallized Al-Si alloy casting process |
| CN110538587A (en) * | 2019-09-12 | 2019-12-06 | 福建省鼎智新材料科技有限公司 | Powder spraying semi-solid pulping device based on gas stirring and working method thereof |
| CN110538587B (en) * | 2019-09-12 | 2022-03-08 | 福建省鼎智新材料科技有限公司 | Powder spraying semi-solid pulping device based on gas stirring and working method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140618 Effective date of abandoning: 20160120 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |