CN102181688A - Method for uniformly dispersing alumina particles in QTi3.5-6 alumina semi-solid slurry - Google Patents
Method for uniformly dispersing alumina particles in QTi3.5-6 alumina semi-solid slurry Download PDFInfo
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- CN102181688A CN102181688A CN 201110088689 CN201110088689A CN102181688A CN 102181688 A CN102181688 A CN 102181688A CN 201110088689 CN201110088689 CN 201110088689 CN 201110088689 A CN201110088689 A CN 201110088689A CN 102181688 A CN102181688 A CN 102181688A
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Abstract
The invention discloses a method for uniformly dispersing alumina particles in QTi3.5-6 alumina semi-solid slurry, belonging to the research field of uniform dispersion of the alumina particles in the QTi3.5-6 alumina semi-solid slurry. In the invention, by using an electromagnetic and mechanical preparation method, the alumina particles in the QTi3.5-6 alumina semi-solid slurry are uniformly dispersed by using a double-blade layer mechanical disperser under a condition that radians of concave arc surfaces of upper and lower arc blades are 29-31 DEG and 59-61 DEG respectively, so that the alumina particles can be fast distributed in an uniform way and the uniform dispersion time of the alumina particles can be reduced to eight minutes and twenty seconds.
Description
Technical field
The present invention relates to the homodisperse method of alumina particle in a kind of QTi3.5-6 aluminum oxide semi solid slurry.
Background technology
Publication number: CN1768979A, denomination of invention: on " a kind of QTi3.5-10 graphite semi-solid slurry preparation method ", set forth the electromagnetism+mechanical preparation method of QTi3.5-10 graphite semi-solid slurry, promptly, utilize electromagnetic mixing apparatus to stir, smash the primary dendrite that forms in the QTi3.5 titanium bronze alloy liquid process of setting, form the QTi3.5 titanium bronze semi solid slurry that constitutes by nascent solid phase particles and liquid phase earlier; Then, by the mechanical dispersion device and move up and down control device, constantly the graphite granule that swims in QTi3.5 titanium bronze semi solid slurry top in the crucible is distributed in the QTi3.5 titanium bronze semi solid slurry.In this electromagnetism+mechanical preparation method, the mechanical dispersion device is single blade layer mechanical dispersion device, adopt the individual layer blade, in effective contact range of blade and semi solid slurry, by blade graphite granule is applied dissipation of ferees, constantly graphite granule is distributed in the semi solid slurry, the radian of disclosed mechanical dispersion device individual layer arc shaped blade cancave cambered surface is under 40～90 ° of conditions in patent CN1768979A, single blade layer mechanical dispersion device and moving up and down after the control device operation is homodisperse 15～20min can obtain the equally distributed QTi3.5-10 graphite semi-solid slurry of graphite granule.
QTi3.5-6 aluminum oxide semi solid slurry is the semi solid slurry that contains 6wt% alumina particle and nascent solid phase particles of 94wt% and liquid phase, adopt the CN1768979A patented method, be under 40～90 ° of conditions at the radian of disclosed mechanical dispersion device individual layer arc shaped blade cancave cambered surface, need homodisperse after 14～17 minutes, just can obtain the equally distributed QTi3.5-6 aluminum oxide of alumina particle semi solid slurry.
Preparation for QTi3.5-6 aluminum oxide semi solid slurry, realizing under the equally distributed prerequisite of alumina particle, mechanical dispersion device and the working time that moves up and down control device thereof are that the homodisperse time is short more, energy consumption is more little, cost is low more, and the pollution that QTi3.5-6 aluminum oxide semi solid slurry is subjected to is also few more, and its quality is high more, therefore can realize that the homodisperse time of the equally distributed QTi3.5-6 aluminum oxide of alumina particle semi solid slurry is short more good more.
Summary of the invention
Technical problem to be solved by this invention is, overcome the deficiency of existing electromagnetism+mechanical preparation method " the homodisperse time is long ", provide a kind of and can realize the homodisperse method of alumina particle in the QTi3.5-6 aluminum oxide semi solid slurry fast, further shorten and realize the equally distributed homodisperse time of alumina particle.
The technical solution adopted for the present invention to solve the technical problems is: adopt electromagnetism+mechanical preparation method, utilize double leaf lamella mechanical dispersion device, be respectively at levels arc shaped blade cancave cambered surface radian under the condition of 29～31 ° and 59～61 °, QTi3.5-6 aluminum oxide semi solid slurry is carried out homodisperse.
The invention has the beneficial effects as follows: for the particle in the melt, want to finish as early as possible its dispersion in melt, must strengthen disperseing intensity.In semi solid slurry electromagnetism+mechanical preparation method, if after the individual layer blade is implemented to disperse to the particle in the semi solid slurry, and then utilize another layer blade to implement to disperse for the second time again, so, the particulate dispersion effect will be clearly better in the semi solid slurry, realize that the homodisperse time that uniform particles distributes will further shorten, the present invention utilizes the continuous quadratic of the twi-tier blade after the optimum combination of levels arc shaped blade cancave cambered surface radian to disperse, further promote the uniform distribution of alumina particle in semi solid slurry, thereby reached the purpose that shortens the homodisperse time.Utilize the present invention, QTi3.5-6 aluminum oxide semi solid slurry is carried out homodisperse, realize that the equally distributed homodisperse time of alumina particle can shorten to 8 minutes and 20 seconds, shortened 40% at least than the 14 minutes the shortest homodisperse time of adopting the CN1768979A patented method.
Description of drawings
Fig. 1 carries out the front view of homodisperse device to alumina particle in the QTi3.5-6 aluminum oxide semi solid slurry for the inventive method.
Among the figure, the tail rod 2 of mechanical dispersion device, the arc shaped blade 3 of mechanical dispersion device, plumbago crucible 4, heating tube 5, cooling tube 6, stop up 7, QTi3.5-6 aluminum oxide semi solid slurry 8, outer cover 9, loam cake 10, Ar tracheae 11, thermopair 12, orienting sleeve 13, motor 14, transmission rig 15, upper stroke switch 16, lower stroke switch 17, support 18.
Fig. 2 carries out the A-A view of homodisperse device to alumina particle in the QTi3.5-6 aluminum oxide semi solid slurry for the inventive method.
Among the figure, the electromagnetic pole of electromagnetic mixing apparatus is to 1.
Fig. 3 is the microtexture of the QTi3.5-6 aluminum oxide semi solid slurry that adopts the inventive method that alumina particle in the QTi3.5-6 aluminum oxide semi solid slurry is carried out to obtain behind the homodisperse.
Embodiment
As follows to specifying of alumina particle device in the inventive method homodisperse QTi3.5-6 aluminum oxide semi solid slurry in conjunction with the accompanying drawings:
The alumina particle device comprises in the homodisperse QTi3.5-6 aluminum oxide semi solid slurry: electromagnetic mixing apparatus, mechanical dispersion device and move up and down control device, plumbago crucible 4, loam cake 10, stop up 7, outer cover 9, Ar tracheae 11 and thermopair 12.
The power of electromagnetic mixing apparatus is 10kW, its three pairs of electromagnetic poles are distributed on around the plumbago crucible 41, and between the crucible outer wall are 5mm apart from a, heating tube 5 and cooling tube 6 uniformly at intervals in the sidewall of crucible, be connected with the cooling fluid plenum system with external power source respectively, electromagnetic pole adds outer cover 9 to 1 outside;
The mechanical dispersion device is a double leaf lamella mechanical dispersion device, by square tail rod 2 and at interval b be that two blade layers up and down of 20mm constitute, material is a heat-stable ceramic, four other shapes and the identical arc shaped blade 3 of corresponding distribution except cancave cambered surface radian difference are respectively arranged in two blade layers, four arc shaped blades 3 of lower floor, be positioned at tail rod 2 bottoms, with four Surface Vertical of tail rod 2 and with it with wide, be mutually 90 °, cancave cambered surface down, be circular arc, radian is 59～61 °, arranges that in face of melt circumferential movement direction cancave cambered surface top tangent line is parallel with sea line, the lower surface of cancave cambered surface bottom and tail rod 2 is located in the same horizontal plane, and the distance c between blade outer end and the crucible inwall is 5mm; The arc shaped blade cancave cambered surface radian on upper strata is 29～31 °;
The mechanical dispersion device moves up and down control device and is made of motor 14, transmission rig 15, upper stroke switch 16 and lower stroke switch 17.Transmission rig 15 is between mechanical dispersion device tail rod 2 tops and motor 14, constitute by rack and pinion, turbine and worm drive, turning to of motor 14 by upper stroke switch 16 and lower stroke switch 17 controls, just, when the upper strata of mechanical dispersion device blade is moved upwards up to semi solid slurry 8 tops, tail rod 2 touches upper stroke switch 16, and motor 14 changes turn to, and the mechanical dispersion device is moved down; When the lower leave of mechanical dispersion device was moved down into plumbago crucible 4 bottoms, tail rod 2 touched lower stroke switch 17, and motor 14 changes turn to, and the mechanical dispersion device is moved up;
The mechanical dispersion device move up and down speed control at 1～10mm/s, tail rod 2 relies on orienting sleeve 13 location, Ar tracheae 11 and thermopair 12 insert crucible by hole on the loam cake 10 and the hole between the mechanical dispersion device blade, stop up 7 and be positioned at crucible bottom, motor 14, transmission rig 15, upper stroke switch 16, lower stroke switch 17, orienting sleeve 13 adopt mechanical connection manner to be fixed on the support 18.
Alumina particle homodisperse method in a kind of QTi3.5-6 aluminum oxide semi solid slurry, utilize electromagnetic mixing apparatus to stir, smash the primary dendrite that forms in the QTi3.5 titanium bronze alloy liquid process of setting, form the QTi3.5 titanium bronze semi solid slurry that constitutes by nascent solid phase particles and liquid phase earlier; Then, by the mechanical dispersion device and move up and down control device, constantly the alumina particle that swims in QTi3.5 titanium bronze semi solid slurry top in the crucible is distributed in the QTi3.5 titanium bronze semi solid slurry, obtain the equally distributed QTi3.5-6 aluminum oxide of alumina particle semi solid slurry, may further comprise the steps:
Embodiment one, the speed of moving up and down at the mechanical dispersion device is that 3mm/s, homodisperse temperature are under 1015 ℃, when the levels arc shaped blade cancave cambered surface radian of double leaf lamella mechanical dispersion device is respectively 29 ° and 59 °, realize that the homodisperse time of the equally distributed QTi3.5-6 aluminum oxide of alumina particle semi solid slurry is 8 minutes and 20 seconds.
Embodiment two, the speed of moving up and down at the mechanical dispersion device is that 1mm/s, homodisperse temperature are under 1015 ℃, when the levels arc shaped blade cancave cambered surface radian of double leaf lamella mechanical dispersion device is respectively 29 ° and 61 °, realize that the homodisperse time of the equally distributed QTi3.5-6 aluminum oxide of alumina particle semi solid slurry is 8 minutes and 20 seconds.
Embodiment three, the speed of moving up and down at the mechanical dispersion device is that 10mm/s, homodisperse temperature are under 1025 ℃, when the levels arc shaped blade cancave cambered surface radian of double leaf lamella mechanical dispersion device is respectively 31 ° and 59 °, realize that the homodisperse time of the equally distributed QTi3.5-6 aluminum oxide of alumina particle semi solid slurry is 8 minutes and 10 seconds.
Embodiment four, the speed of moving up and down at the mechanical dispersion device is that 10mm/s, homodisperse temperature are under 1025 ℃, when the levels arc shaped blade cancave cambered surface radian of double leaf lamella mechanical dispersion device is respectively 31 ° and 61 °, realize that the homodisperse time of the equally distributed QTi3.5-6 aluminum oxide of alumina particle semi solid slurry is 8 minutes and 10 seconds.
Embodiment five, the speed of moving up and down at the mechanical dispersion device is that 5mm/s, homodisperse temperature are under 1043 ℃, when the levels arc shaped blade cancave cambered surface radian of double leaf lamella mechanical dispersion device is respectively 30 ° and 60 °, realize that the homodisperse time of the equally distributed QTi3.5-6 aluminum oxide of alumina particle semi solid slurry is 8 minutes and 10 seconds.
As seen, under the levels arc shaped blade cancave cambered surface radian of double leaf lamella mechanical dispersion device is respectively 29～31 ° and 59～61 ° of conditions, QTi3.5-6 aluminum oxide semi solid slurry is carried out homodisperse, realize that the equally distributed homodisperse time of alumina particle can shorten to 8 minutes and 20 seconds.
Claims (1)
1. alumina particle homodisperse method in the QTi3.5-6 aluminum oxide semi solid slurry, utilize electromagnetic mixing apparatus to stir, smash the primary dendrite that forms in the QTi3.5 titanium bronze alloy liquid process of setting, form the QTi3.5 titanium bronze semi solid slurry that constitutes by nascent solid phase particles and liquid phase earlier; Then, by the mechanical dispersion device and move up and down control device, constantly the alumina particle that swims in QTi3.5 titanium bronze semi solid slurry top in the crucible is distributed in the QTi3.5 titanium bronze semi solid slurry, obtain the equally distributed QTi3.5-6 aluminum oxide of alumina particle semi solid slurry, may further comprise the steps:
Step 1, preparation QTi3.5 titanium bronze alloy liquid, temperature is controlled at 1200 ℃;
Step 2 is poured QTi3.5 titanium bronze alloy liquid and 230 purpose alumina particles in the plumbago crucible into, and crucible is preheating to 1000 ℃ by the heating tube in its wall, cover loam cake after, connect Ar gas with anti-oxidation;
Step 3, start electromagnetic mixing apparatus, stir, simultaneously, close in the power supply of heating tube and the cooling tube in sidewall of crucible and to connect water coolant and cool off, melt is cooled to 1015～1043 ℃ of homodisperse temperature after, close water coolant, open and regulate the power supply of heating tube, make melt temperature be stabilized in this homodisperse temperature;
Step 4, under this homodisperse temperature, induction stirring started mechanical decollator and moves up and down control device after 5 minutes, behind the homodisperse certain hour, obtained the QTi3.5-6 aluminum oxide semi solid slurry of homogeneous microstructure;
It is characterized in that the mechanical dispersion device is a double leaf lamella mechanical dispersion device, its levels arc shaped blade cancave cambered surface radian is respectively 29～31 ° and 59～61 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110088689 CN102181688A (en) | 2011-04-10 | 2011-04-10 | Method for uniformly dispersing alumina particles in QTi3.5-6 alumina semi-solid slurry |
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| CN 201110088689 CN102181688A (en) | 2011-04-10 | 2011-04-10 | Method for uniformly dispersing alumina particles in QTi3.5-6 alumina semi-solid slurry |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1768979A (en) * | 2005-09-22 | 2006-05-10 | 北京交通大学 | Method for preparing QTi3.5-10 graphite semi-solid state slurry |
| CN201693159U (en) * | 2010-06-20 | 2011-01-05 | 浙江工贸职业技术学院 | Semisolid slurry stirring preparation device for light metal |
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- 2011-04-10 CN CN 201110088689 patent/CN102181688A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1768979A (en) * | 2005-09-22 | 2006-05-10 | 北京交通大学 | Method for preparing QTi3.5-10 graphite semi-solid state slurry |
| CN201693159U (en) * | 2010-06-20 | 2011-01-05 | 浙江工贸职业技术学院 | Semisolid slurry stirring preparation device for light metal |
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Application publication date: 20110914 |