CN203508950U - Device for inducing molten metal to carry out rapid and mass nucleation through rotary rod - Google Patents

Device for inducing molten metal to carry out rapid and mass nucleation through rotary rod Download PDF

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Publication number
CN203508950U
CN203508950U CN201320474980.XU CN201320474980U CN203508950U CN 203508950 U CN203508950 U CN 203508950U CN 201320474980 U CN201320474980 U CN 201320474980U CN 203508950 U CN203508950 U CN 203508950U
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transfer rod
slurry
molten metal
rotary rod
gathering system
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CN201320474980.XU
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Chinese (zh)
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周荣锋
陈宗宝
蒋业华
周荣
卢德宏
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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Abstract

The utility model relates to a device for inducing molten metal to carry out rapid and mass nucleation through a rotary rod, and belongs to the technical field of the material science. A support serves as a structural main body of the device, a melting system, a stirring system and a slurry collecting system are arranged inside the support; the rotary rod which can carry out autorotation serves as a main body of the stirring system, the rotary rod is arranged inside the slurry collecting system, the melting system is connected with the slurry collecting system through a heat-insulating guiding pipe, and the lower end of the heat-insulating guiding pipe aligns to the upper portion of the rotary rod. The device is easy to operate and accurate in control; due to control over the speed of the rotary rod, the circulating speed of cooling fluid and the temperature of slurrying chamber, the nucleation rate of grains is improved, the coarsening rate of the grains is controlled, slurry with the smaller grains and the better uniformity can be prepared, meanwhile, oxidation of the slurry is avoided through gas protection, and the semisolid slurry with an excellent structure can be provided for follow-up processing.

Description

A kind of device of transfer rod induction molten metal rapid, high volume forming core
Technical field
The device that the present invention relates to a kind of transfer rod induction molten metal rapid, high volume forming core, belongs to materials science field.
Background technology
First semisolid metal processing technology found and propose by the research team of the Flemings of Massachusetts Institute Technology in the seventies in last century, and this technology is mainly divided into rheological molding and thixotropic forming.No matter be any in two kinds of forming techniques, all must first prepare and organize excellent semi solid slurry, the quality of semi-solid alloy slurry is directly determining the quality of shaping device performance.Development through more than 40 years, thixotropic forming has been realized and having been commercially produced because it has good controllability, the Ormet of the U.S., Alumax company, gondola Stampal SpA and Fiat Auto company, the EFU company of Germany, the Buhler company of Switzerland, the Pechiney company of France etc. carries out the batch production of semisolid device by thixotropic forming, but because thixotropic forming exists technological process long, base cost is high, energy consumption is high, the technical bottlenecks such as waste material cannot directly reclaim, determined that it can only be applied in some high-end product field, cannot realize extensive use at common parts.In recent years, rheological molding technology, particularly rheology pulping technique become the emphasis of domestic and international semi-solid state forming technique research gradually.
Two key factors of semi-solid-state shaping: the one, excellent slurry is organized in low-cost preparation, and the 2nd, improve whole working (machining) efficiency.In traditional mechanical agitation electromagnetic agitation formula rheocasting, the chamber of penetrating, prepare the impact that is more or less subject to above two factors in slurry rheocasting, single-screw mechanical agitation type rheocasting, double helix mechanical agitation type rheocasting, Prepared by Low Superheat Pouring and weak mechanical agitation type rheocasting, low overheat hang plate cast-type rheocasting.Along with going deep into of research, researcher updates original technology and the new technology of invention.Rheology foundry engieering SLC (sub-liquid-casting) under a kind of low-cost liquidus curve of U.S. THT company invention; Canada Alcan company proposes eddy current heat content bascule and prepares semi solid slurry SEED(swirled enthalpy equilibration device); The human hairs such as the Guan Renguo of Northeastern University understand wave hang plate, and on hang plate, install shaking device additional, prepared semi-solid metal slurry particle roundness, and the uniformity all increases; The Mao Weimin of University of Science & Technology, Beijing etc. has invented serpentine channel slurry technology of preparing; People's invention drum-type semi-solid rheological molding technology (Chinese Patent Application No. 01109074.X, 2001) such as the Kang Yonglin of University of Science & Technology, Beijing, and obtained small-scale business application; The human hairs such as the Yang Xiang outstanding person of University Of Nanchang understand that inclination cylinder legal system is for semi-solid metal slurry technology; The invention heat content balance rotating magnetic field devices such as the Zhang little Li of Jiangsu University of Science and Technology; The Liu Wen of Zhejiang University etc. propose a kind of oval turn-knob pipe and repeatedly coagulate molten legal system for semi-solid alloy slurry; The human hairs such as the Wang Wen person of outstanding talent of the Central China University of Science and Technology understand airflow stirring vibration composite algorithm semi-solid slurry preparation device; The human hairs such as Kunming University of Science and Technology, the Zhourong of Xi'an Communications University cutting edge of a knife or a sword, Xing Jiandong understand that hang plate technology of preparing is overcurrent cooling technology.The above mentioned semi solid slurry technology of preparing has all obtained certain success, but is more or less subject to the restriction of the problems such as cost and efficiency, therefore will make rheological molding technology be further developed, and also has a lot of needs of work to do.
Summary of the invention
For efficient preparation under low cost, organize excellent semi-solid alloy slurry, the utility model proposes a kind of device of transfer rod induction molten metal rapid, high volume forming core.
The apparatus structure of transfer rod induction molten metal rapid, high volume forming core of the present utility model is: main body is support 2, and support 2 inside comprise smelting system, stirring system and slurry gathering system; The main body of stirring system be can rotation transfer rod 18, it is inner that transfer rod 18 is placed in slurry gathering system, smelting system is connected by conduit pipe with thermal insulation 15 with slurry gathering system and the top of the lower end aligned transfer rod 18 of conduit pipe with thermal insulation 15.
The transfer rod 18 of described stirring system is by feed belt 7 by buncher 1 driven rotary, and transfer rod 18 is fixed on support 1 by rigid bearing.As shown in Figure 1, feed belt 7 connects by belt pulley at transfer rod 18 places.The horizontal or vertical placement of transfer rod, its rotation is connected to buncher 1 by belt pulley 9 transmissions or gear drive, and the turn/min of rotating speed 0 ~ 3000 of transfer rod 18 can regulate continuously.Transfer rod is hollow, can form for good materials processings of heat conduction such as copper, steel, cast iron matter, graphite matter, and according to different its external diameter 20 ~ 300mm of the molten metal kind of processing, wall thickness 2 ~ 10mm is adjustable.
Described transfer rod 18 is hollow structure, and inside is provided with cooling or preheating medium inlet pipe 5, and the outer wall of transfer rod has cooling or preheating media outlet 6.As shown in Figure 1, adopt hollow design, internal diameter 10mm~500mm, external diameter 11mm~550mm, wall thickness 1mm~50mm, length 100mm~1500mm, transfer rod rotating speed is at 0r/min~3000r/min, hollow transfer rod inside passes into liquid medium with cooling or preheating transfer rod to 25 ~ 200 ℃, accurately to control molten metal, crosses and is chilled to 10 ~ 50 ℃ and does not grow up to impel metal liquid nucleus.
Described slurry gathering system is by placing the cavity of transfer rod 18 and the slurry collector 19 of lower end forms, the inwall of slurry gathering system is distributed with attemperator, and (inwall is distributed with thermal insulation layer 16, the outer surface of thermal insulation layer 16 is distributed with heater coil 17), slurry collector 19 is convenient to other technique (as centrifugal casting, extrusion casint or forging etc.) connection direct forming, in collection process, slurry is applied to certain heating and thermal insulation, a large amount of nucleus propagation, slaking, organize gained more even.
Described slurry gathering system elevating mechanism 3 is installed, elevating mechanism 3 is adjusted the height of slurry gathering system at any time.
Described smelting system and slurry gathering system all have gas shield device.As shown in Figure 1, smelting system has gas atmosphere inlet II 11, slurry gathering system to have gas atmosphere inlet I 4.In order to prevent that in whipping process, slurry directly contacts with surrounding air and produces oxidation or be involved in generation bubble, by transfer rod and the sealing of melt contact portion, and pass into protective gas N 2, Ar or other inert protective gas.The main body of smelting system is smelting furnace 12, and outlet is by stopper rod 10 gauge taps, and exit connects the upper end of conduit pipe with thermal insulation 15.
Principle of the present invention is: from the thermodynamics and kinetics condition of grain nucleation, grain growth, start with, metal bath is evenly poured into by conduit pipe with thermal insulation in smelting furnace insulation on the transfer rod of certain rotating speed and overcurrent, in rod, circulating cooling system continues to take away melt heat, by controlling transfer rod velocity of rotation, control melt flow process and sprawl thickness on transfer rod, make the certain degree of supercooling of melt composition, promote its a large amount of forming cores, add transfer rod rotation and melt Action of Gravity Field and impel crystal grain free.In addition, the accurate control of pulping chamber temperature can make that crystal grain in gained semi solid slurry is constantly bred, slaking, and has all the time gas shield, avoids the oxidation of slurry.Finally obtain that crystal grain is tiny, rounding, equally distributed semi solid slurry.
Major advantage of the present invention is as follows:
(1) apparatus structure is simple, and equipment cost is low, quick detachable, and change flexibly, can directly combine with other post forming processing (centrifugal casting, extrusion casint or forging etc.) production technologies;
(2) simple to operate, control accurately, by controlling transfer rod speed, the temperature of liquid circulation speed and pulping chamber, had both improved the nucleation rate of crystal grain, controlled again the coarsening rate of crystal grain, thereby prepare, crystal grain is more tiny, the better slurry of the uniformity, meanwhile, under gas shield, prevent the oxidation of slurry, can organize excellent semi solid slurry for following process provides;
(3) by changing the transfer rod of unlike material, can prepare high temperature or low-temperature alloy slurry, optional alloys range is more;
(4) compare with traditional pulping process, the present invention has cooling recirculation system can continue slurrying, by changing material or the diameter of transfer rod, increase contact area and the heat conduction amount of melt and transfer rod, can improve poring rate, thereby improve slurrying efficiency, for business application provides reliable guarantee.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram of the present utility model;
Fig. 2 is the metallographic structure figure before embodiment 1 transfer rod is processed;
Fig. 3 is the metallographic structure figure after embodiment 1 transfer rod is processed;
Fig. 4 is the metallographic structure figure before embodiment 2 transfer rods are processed;
Fig. 5 is the metallographic structure figure after embodiment 2 transfer rods are processed;
Fig. 6 is the metallographic structure figure before embodiment 3 transfer rods are processed;
Fig. 7 is the metallographic structure figure after embodiment 3 transfer rods are processed.
In figure: 1-buncher, 2-support, 3-elevating mechanism, 4-gas atmosphere inlet I; cooling or the preheating medium inlet of 5-pipe, the cooling or preheating media outlet of 6-, 7-driving belt; 8-rigid bearing, 9-belt pulley, 10-stopper rod; 11-gas atmosphere inlet II, 12-smelting furnace, 13-metal bath; 14-metal joint, 15-conduit pipe with thermal insulation, 16-thermal insulation layer; 17-heater coil, 18-transfer rod, 19-slurry collector.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment one: as shown in Figure 1, the structure of the device of transfer rod induction molten metal rapid, high volume forming core of the present utility model is: main body is support 2, and support 2 inside comprise smelting system, stirring system and slurry gathering system; The main body of stirring system be can rotation transfer rod 18, it is inner that transfer rod 18 is placed in slurry gathering system, smelting system is connected by conduit pipe with thermal insulation 15 with slurry gathering system and the top of the lower end aligned transfer rod 18 of conduit pipe with thermal insulation 15.The transfer rod 18 of stirring system is by feed belt 7 by buncher 1 driven rotary, and transfer rod 18 is fixed on support 1 by rigid bearing.Transfer rod 18 is hollow structure, and inside is provided with cooling or preheating medium inlet pipe 5, and the outer wall of transfer rod has cooling or preheating media outlet 6.Slurry gathering system is by placing the cavity of transfer rod 18 and the slurry collector 19 of lower end forms, and the inwall of slurry gathering system is distributed with attemperator (inwall is distributed with thermal insulation layer 16, and the outer surface of thermal insulation layer 16 is distributed with heater coil 17).There is elevating mechanism 3 outside of slurry gathering system, and elevating mechanism 3 is adjusted the height of slurry gathering system at any time.
The concrete using method of the device of the transfer rod induction molten metal rapid, high volume forming core of the present embodiment is: at smelting furnace, directly prepare A356 aluminium alloy (613 ℃, liquidus temperature line, 577 ℃ of solidus temperatures) low superheated melt (630 ℃), and be incubated 1h and make it inner evenly, pull open stopper rod with 1.8 * 10 -5m 3it is 500r/min that the poring rate of/s is poured into through electromagnetic adjustable speed motor speed governing, and diameter is 60mm, and on the copper transfer rod that wall thickness is 3mm, rod is interior with 2.0 * 10 -4m 3the flow velocity of/s injects cooling circulating water; pulping chamber temperature is 580 ℃, and passes into protective gas Ar, and melt is 200mm at transfer rod overcurrent height; melt, through air cooling in the cooling inflow graphite crucible of transfer rod overcurrent, obtains the semi-solid aluminium alloy size of fine microstructures, rounding.As shown in Fig. 2~3.
Embodiment two: as shown in Figure 1, the structure of the device of transfer rod induction molten metal rapid, high volume forming core of the present utility model is: main body is support 2, and support 2 inside comprise smelting system, stirring system and slurry gathering system; The main body of stirring system be can rotation transfer rod 18, it is inner that transfer rod 18 is placed in slurry gathering system, smelting system is connected by conduit pipe with thermal insulation 15 with slurry gathering system and the top of the lower end aligned transfer rod 18 of conduit pipe with thermal insulation 15.Transfer rod 18 is hollow structure, and inside is provided with cooling or preheating medium inlet pipe 5, and the outer wall of transfer rod has cooling or preheating media outlet 6.Slurry gathering system is by placing the cavity of transfer rod 18 and the slurry collector 19 of lower end forms, and the inwall of slurry gathering system is distributed with attemperator (inwall is distributed with thermal insulation layer 16, and the outer surface of thermal insulation layer 16 is distributed with heater coil 17).
The concrete using method of the device of the transfer rod induction molten metal rapid, high volume forming core of the present embodiment is: by Al-25%Si aluminium alloy (778 ℃, the liquidus temperature line that adopts traditional method of smelting to prepare, 577 ℃ of solidus temperatures) low superheated melt (785 ℃) forwards smelting furnace insulation 1h to, guarantee that melt is even, promote stopper rod with 1.0 * 10 -5m 3it is 800r/min that the poring rate of/s is poured into rotating speed by conduit pipe with thermal insulation, and diameter is 100mm, and on the steel transfer rod of wall thickness 5mm, rod is interior with 3.0 * 10 -4m 3the flow velocity of/s injects cooling circulating water, and pulping chamber temperature is normal temperature, and passes into protective gas N 2, melt is 300mm at transfer rod overcurrent height, and melt, through stirring overcurrent, flows in copper mould, and carries out shrend, obtains the semi-solid aluminium alloy size of fine microstructures, rounding, and as Fig. 4~5, primary silicon obtains obvious refinement, and shape is also approximate spherical.
Embodiment three: as shown in Figure 1, the structure of the device of transfer rod induction molten metal rapid, high volume forming core of the present utility model is: main body is support 2, and support 2 inside comprise smelting system, stirring system and slurry gathering system; The main body of stirring system be can rotation transfer rod 18, it is inner that transfer rod 18 is placed in slurry gathering system, smelting system is connected by conduit pipe with thermal insulation 15 with slurry gathering system and the top of the lower end aligned transfer rod 18 of conduit pipe with thermal insulation 15.Transfer rod 18 is hollow structure, and inside is provided with cooling or preheating medium inlet pipe 5, and the outer wall of transfer rod has cooling or preheating media outlet 6.Slurry gathering system is by placing the cavity of transfer rod 18 and the slurry collector 19 of lower end forms, and the inwall of slurry gathering system is distributed with attemperator.
The concrete using method of the device of the transfer rod induction molten metal rapid, high volume forming core of the present embodiment is: adopt intermediate frequency furnace by hypereutectic high chromium cast iron melting to 1450 ℃, and be incubated 30min, with 2.0 * 10 -5m 3it is 600r/min that the poring rate of/s is poured into rotating speed, and diameter is 55mm, and on the vertical steel transfer rod of wall thickness 3mm (transfer rod is coated zirconium English powder flame retardant coating), rod is interior with 4.0 * 10 -4m 3the flow velocity of/s injects cooling circulating water, and pulping chamber temperature is normal temperature, and passes into protective gas Ar, and melt is 200mm at transfer rod overcurrent height, and melt, through stirring overcurrent, flows in graphite crucible, cooling at air natural, as Fig. 3, and gained fine microstructures, even.As shown in Fig. 6~7.
Below by reference to the accompanying drawings the specific embodiment of the present utility model is explained in detail, but the utility model is not limited to above-mentioned embodiment, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from aim of the present invention, make various variations.

Claims (5)

1. the device of transfer rod induction molten metal rapid, high volume forming core, main body is support (2), support (2) inside comprises smelting system, stirring system and slurry gathering system, it is characterized in that: the main body of stirring system be can rotation transfer rod (18), it is inner that transfer rod (18) is placed in slurry gathering system, and smelting system is connected by conduit pipe with thermal insulation (15) with slurry gathering system and the top of the lower end aligned transfer rod (18) of conduit pipe with thermal insulation (15).
2. transfer rod according to claim 1 is induced the device of molten metal rapid, high volume forming core, it is characterized in that: described transfer rod (18) is hollow structure, inside is provided with cooling or preheating medium inlet pipe (5), and the outer wall of transfer rod (18) has cooling or preheating media outlet (6).
3. transfer rod according to claim 1 is induced the device of molten metal rapid, high volume forming core, it is characterized in that: described slurry gathering system is by placing the cavity of transfer rod (18) and the slurry collector (19) of lower end forms, and the inwall of slurry gathering system is distributed with attemperator.
4. the device of transfer rod induction molten metal rapid, high volume forming core according to claim 1, is characterized in that: described slurry gathering system is provided with elevating mechanism (3).
5. the device of transfer rod induction molten metal rapid, high volume forming core according to claim 1, is characterized in that: described smelting system and slurry gathering system all have gas shield device.
CN201320474980.XU 2013-08-06 2013-08-06 Device for inducing molten metal to carry out rapid and mass nucleation through rotary rod Expired - Fee Related CN203508950U (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105057643A (en) * 2015-08-13 2015-11-18 合肥熠辉轻合金科技有限公司 Device and method for preparing semi-solid metal by rotating vertical straight pipe channel
CN105149549A (en) * 2015-09-21 2015-12-16 珠海市润星泰电器有限公司 Device and method for preparing semi-solid sizing agent
CN105397050A (en) * 2015-12-08 2016-03-16 昆明理工大学 Semi-solid forming method for copper alloy
CN105537540A (en) * 2016-01-04 2016-05-04 中兴通讯股份有限公司 Preparation method and preparation equipment for semi-solid slurry
CN106595320A (en) * 2016-11-30 2017-04-26 佛山市顺智环保科技有限公司 Industrial boiler capable of preheating raw material
CN106925730A (en) * 2015-12-30 2017-07-07 北京有色金属研究总院 The preparation facilities and method of a kind of big specification fine grain homogeneous aluminium alloy cast ingot
CN108372277A (en) * 2018-03-29 2018-08-07 南昌大学 A kind of device preparing metal semi-solid slurry
CN108580814A (en) * 2018-03-29 2018-09-28 南昌大学 A method of preparing metal semi-solid slurry
CN110449562A (en) * 2019-09-05 2019-11-15 广州和德轻量化成型技术有限公司 Rheological pulping equipment and rheological pulping method for aluminum alloy extrusion casting machine
CN116162818A (en) * 2023-03-01 2023-05-26 昆明理工大学 Method for integrally preparing aluminum alloy by utilizing semi-solid slurry plastic molding
CN118002767A (en) * 2024-04-10 2024-05-10 东北大学 Device and process method for vibration chilling nucleation

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105057643A (en) * 2015-08-13 2015-11-18 合肥熠辉轻合金科技有限公司 Device and method for preparing semi-solid metal by rotating vertical straight pipe channel
CN105149549A (en) * 2015-09-21 2015-12-16 珠海市润星泰电器有限公司 Device and method for preparing semi-solid sizing agent
CN105149549B (en) * 2015-09-21 2017-04-19 珠海市润星泰电器有限公司 Device and method for preparing semi-solid sizing agent
CN105397050A (en) * 2015-12-08 2016-03-16 昆明理工大学 Semi-solid forming method for copper alloy
CN106925730A (en) * 2015-12-30 2017-07-07 北京有色金属研究总院 The preparation facilities and method of a kind of big specification fine grain homogeneous aluminium alloy cast ingot
CN106925730B (en) * 2015-12-30 2019-06-18 北京有色金属研究总院 A kind of preparation facilities and method of big specification fine grain homogeneous aluminium alloy cast ingot
CN105537540A (en) * 2016-01-04 2016-05-04 中兴通讯股份有限公司 Preparation method and preparation equipment for semi-solid slurry
CN106595320A (en) * 2016-11-30 2017-04-26 佛山市顺智环保科技有限公司 Industrial boiler capable of preheating raw material
CN108580814A (en) * 2018-03-29 2018-09-28 南昌大学 A method of preparing metal semi-solid slurry
CN108372277A (en) * 2018-03-29 2018-08-07 南昌大学 A kind of device preparing metal semi-solid slurry
CN108580814B (en) * 2018-03-29 2023-05-02 南昌大学 Method for preparing metal semi-solid slurry
CN108372277B (en) * 2018-03-29 2023-05-30 南昌大学 Device for preparing metal semi-solid slurry
CN110449562A (en) * 2019-09-05 2019-11-15 广州和德轻量化成型技术有限公司 Rheological pulping equipment and rheological pulping method for aluminum alloy extrusion casting machine
CN116162818A (en) * 2023-03-01 2023-05-26 昆明理工大学 Method for integrally preparing aluminum alloy by utilizing semi-solid slurry plastic molding
CN118002767A (en) * 2024-04-10 2024-05-10 东北大学 Device and process method for vibration chilling nucleation
CN118002767B (en) * 2024-04-10 2024-08-20 东北大学 Device and process method for vibration chilling nucleation

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