Continuous preparation device for composite stirred semi-solid slurry
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A semi-solid slurry and preparation device technology, which is applied in the direction of stirring devices, lighting and heating equipment, furnace components, etc., to achieve the effects of similar grain size, good cooling effect, and wide application prospects
Inactive Publication Date: 2013-01-09
UNIV OF SCI & TECH BEIJING
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[0007] The purpose of the present invention is to provide a compound stirring semi-solid slurry continuous preparation device to solve the problem of continuous and stable semi-solid slurry preparation
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example 1
[0021] (1) The liquidus temperature of the ZL104 aluminum alloy used in the test is 610°C. The alloy is melted in a crucible resistance furnace. When the temperature of the alloy reaches about 720°C, the dried hexachloroethane is pressed into the melt The lower part of the alloy body (the addition amount is 0.5% of the total weight of the alloy liquid) is gently shaken to carry out the degassing and slag removal refining treatment of the alloy melt, and finally the temperature of the alloy melt is lowered to 630°C for heat preservation.
[0022] (2) Set the temperature of the stirring chamber of the device of the present invention to 580°C, turn on the speed regulating motor to make the rotating speed of the stirring screw rod 400rad / min, close the graphite plug, block the discharge port, and after each parameter reaches the set value, turn the previous The melted alloy liquid is poured into the mixing chamber of the device of the present invention through the feed port, and th...
example 2
[0024] (1) The liquidus temperature of the 7075 aluminum alloy used in the test is 640°C. Put the aluminum alloy ingot into a crucible resistance furnace with a preheating temperature of 400°C. After the temperature of the alloy liquid reaches 720°C, it is refined. Press the dried hexachloroethane into the lower part of the melt (the amount added is 0.5% of the total weight of the alloy liquid), and shake it gently to degas the alloy melt, remove slag and refine it, and finally melt the alloy Body temperature drops to 660°C for heat preservation.
[0025] (2) Set the temperature of the stirring chamber of the device of the present invention to 610°C, turn on the speed-regulating motor to make the stirring screw rotate at 600 rad / min, rotate the discharge handle, lift the graphite plug and fix it at a certain position to ensure that the slurry flows out slowly. After each parameter reaches the set value, the alloy liquid smelted in the previous step is continuously poured into ...
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Abstract
The invention relates to a continuous preparation device for composite stirred semi-solid slurry, and belongs to the technical field of machining semi-solid metal machining. The device comprises a discharge outlet 1, a graphite plug 2, a graphite lining 3, a stainless steel tube 4, a heating element 5, a cooling element 6, a stirring shaft 7, a thermal insulating layer 8, a bearing 9, a bearing seat 10, a gear 11, a discharge handle 12, a feeding inlet 13, an oblique baffle 14, a rotary blade 15, a stirring blade 16 and the like. The semi-solid slurry is prepared through the following steps: after feeding an alloy fuse into the device, throwing onto the inner wall of a stirring chamber through the rotary blade rotating at high speed, enabling the fuse to flow downward along with the inner wall and flow downward along with the baffle when encountering the oblique baffle, then throwing the fuse on the inner wall of the stirring chamber by the rotary blade, after circulating the processes for two times, enabling the fuse to flow downward along the wall of the graphite lining at the lower part, carrying out convection at the bottom of a stirring bucket through driving of the stirring blade, generating a great deal of crystal nucleus in the fuse in the process, and directly growing into spheres. The flowing velocity of the slurry can be controlled through adjusting a gap between the graphite plug and the graphite lining, the semi-solid slurry can be subjected to rheoforming together with conventional equipment such as die casting, rolling and mold forging, and semi-solid ingot can also be continuously prepared.
Description
technical field [0001] The invention relates to a compound stirring semi-solid slurry continuous preparation device and method, belonging to the technical field of semi-solid metal processing. Background technique [0002] Since the early 1970s, researchers such as M C Flemings of the Massachusetts Institute of Technology created the concept of metal semi-solid forming, and the preparation and forming technology of semi-solid metal paste has attracted widespread attention from all over the world as a new technology. Semi-solid processing is a method of forming using the characteristics of metals in the process of transitioning from liquid to solid or from solid to liquid (that is, the coexistence of liquid and solid). This new forming method combines the strengths of solidification processing and plastic processing. That is, the processing temperature is lower than that of the liquid state, the filling is stable, and the thermal impact on the mold is small; the deformation r...
Claims
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