Air-jet air-cooled ultrafine titanium alloy atomization device and its air-jet air-cooled spray disc

Abstract

The present invention provides an air-jet air-cooled ultrafine titanium alloy atomization device and its air-jet air-cooled spray plate. The center of the spray plate is provided with a vertical through hole, and only a circle of oblique holes distributed at intervals is arranged around the through hole. A Laval nozzle with the same parameters is installed in each of the oblique holes. All Laval nozzles There is an included angle of 28-30 degrees between the extension lines at the lower ends of the tubes and the extension lines at the bottom of the through holes. The present invention adopts the "air-jet air-cooling" technology, which can effectively reduce the risk of increased oxygen content of the micropowder caused by water cooling; the present invention can realize the integration of atomization, anti-reflection and cooling functions, and the Mach number is adjusted to 4.1-4.9, The problem of atomization, cooling and anti-reflection of titanium alloy can be solved at the same time within 0.1 second; and the structure of the spray plate only has a circle of Laval nozzles, which effectively reduces the complexity of the structure of the spray plate and is beneficial to flow field control accuracy while saving energy.

Description

technical field

[0001] The invention relates to a production equipment for ultrafine atomization and cooling of titanium alloy (including 99.999% high-purity titanium). Background technique

[0002] High-purity titanium and titanium alloy ultra-fine materials are increasingly widely used in aerospace, electronic grid and clean energy fields, especially its low density, high strength, and corrosion resistance, which are close to human bone density (non-toxic). Medicine can be used for artificial joints, partial human implantation (cardiac pacemaker), etc. For this reason, a large number of titanium alloy micropowders with an average particle size of 10 microns to 35 microns, an oxygen increment of less than 100PPM, and a spherical rate of about 90% are required. At present, the direct yield of titanium alloy micropowder produced by most domestic and foreign equipment is about 30%, and the output is generally less than 5kg / min, which is difficult to meet the market demand. ...

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