Atomizing formation apparatus for producing spherical casting WC powder
A tungsten carbide powder and spherical technology, which is applied in the field of equipment for producing cemented carbide powder, can solve the problems of short process flow, low spheroidization rate and low spheroidization efficiency, and achieves simple device structure design and good particle size uniformity. , The effect of stable product quality
Inactive Publication Date: 2006-09-13
HUNAN DINGLI NEW MATERIAL ENG CENT +1
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Problems solved by technology
Although this method has the advantages of short process flow, stable product composition, fine grains, high hardness, and good flow properties, it has good performance in spray welding and surfacing; its comprehensive performance is obviously better than traditional Casting WC powder produced by the method; but the material and rotation speed of the cooling plate have a great influence on the quality of the product, and it is difficult to effectively adjust and control, the spheroidization efficiency is low, the uniformity of the product particle size is poor, and it is difficult to produce 200 Defects such as fine powder below the mesh
[0004] Therefore, the above-mentioned background technology exists or high production cost, poor product quality and stability, and poor performance; or high cooling plate material requirements, difficult process control, low spheroidization rate, poor uniformity of product particle size, and difficult to produce 200 Defects such as fine powder below the mesh
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[0014] In this embodiment, the device with a production capacity of 350kg / h spherical cast tungsten carbide powder is taken as an example: the total height is 6710mm, of which: the furnace body is 1957mm high; the atomization forming barrel 9 is 4430mm high and 1400mm in diameter.
[0015] The feeding mechanism 1 is a screw feeder with a diameter of φ45; the low-pressure inert gas inlet pipe 2-1 has a diameter of φ14mm, the gas valve 2-2 is a DN15 needle valve, and the argon pressure is 0.10MPa; the thermometer 2-3 adopts optical measurement Thermometer; shell 4 is an interlayer with a height of 1715mm and a diameter of φ648mm, and 4 to 1 in the middle of the interlayer are cooling water chambers; the length (height) of the graphite furnace tube 14 is 1548mm, and the diameter of the melting chamber 6 is φ35mm; the lower beam tube 13 is 250mm long and the inner diameter φ40mm, beam hole 13~1 diameter φ10mm, hole length 30mm; heater 16 is a double intermediate frequency induction...
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Abstract
The atomizing formation apparatus for producing spherical casting WC powder includes low pressure inert gas intake assembly; furnace shaft containing the feeding mechanism, heater and graphite furnace tube; jetting and atomizing formation assembly containing beam current tube, inner and outer nozzles, high pressure inert gas supplying mechanism and atomizing formation barrel; and water cooling circulation mechanism. Owing to that the melt of the material in the protection of inert gas is acted by the high pressure inert gas flow to be jetted, atomized and formed into spherical powder, the produced spherical casting WC powder has compact structure and low cost. The technological process of the present invention is short, high in production efficiency, stable in product quality, low in power consumption and production cost and good in product using effect.
Description
technical field [0001] The invention belongs to equipment for producing cemented carbide powder, in particular to a device for producing spherical cast tungsten carbide (WC) powder by means of jet atomization. The device is especially suitable for producing spherical cast tungsten carbide powder with a particle size of 40-400 mesh. Background technique [0002] Spherical cast tungsten carbide (WC) powder is widely used because of its high melting point (2600°C), high hardness, excellent wear resistance, good fluidity and filling properties, etc., which can effectively strengthen the mechanical properties of metal parts It is used to strengthen the metal surface of parts with high wear resistance requirements such as petroleum, geology, construction machinery and rolls, so as to effectively improve its working efficiency and service life. The traditional casting of WC powder is to use graphite tube furnace or tilting melting furnace to mix and melt WC and W (tungsten) powder...
Claims
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IPC IPC(8): B22F9/08
Inventor 戴煜颜维羊建高王利民李玉玺李伟勤李睿
Owner HUNAN DINGLI NEW MATERIAL ENG CENT