Adjustable ultra-fine atomizing nozzle for titanium and titanium alloy melt

Abstract

The invention discloses an adjustable ultra-fine atomizing nozzle for titanium and titanium alloy melt. A titanium melt passage penetrates a titanium melt flow guide pipe along the axis, a nozzle sleeve is fixed at one end of the titanium melt flow guide pipe through positioning bolts, high-pressure gas source chambers provided with high-pressure gas source inlets are formed among the outer wall of the titanium melt flow guide pipe and the inner walls of the nozzle sleeve which are partitioned by the positioning bolts, the other end of the titanium melt flow guide pipe is contracted gradually, the inner walls of the nozzle sleeve, opposite to corresponding gradually contracted surfaces, respectively comprise two slope surfaces so that a Laval nozzle is formed among the slope surfaces and the gradually contracted outer wall of the titanium melt flow guide pipe, and the positioning bolts adjust the section size of the Laval nozzle. The size of a throat of the Laval nozzle can be adjusted by the nozzle sleeve, Mach number sprayed by high-pressure gas flow is determined by the throat size, and accordingly, the size of round powder particles formed after atomization of titanium and titanium alloy is determined. By the aid of the adjustable ultra-fine atomizing nozzle for the titanium and titanium alloy melt, powder in different particle sizes can be obtained according to needs, so that equipment flexibility is improved, and an atomizing process is stable and easy to control.

Description

technical field [0001] The invention relates to a nozzle, in particular to a metal powder atomizing nozzle. Background technique [0002] The commonly used preparation methods of ultra-fine metal powders include mechanical methods (such as ball milling and jet milling), physical methods (such as ion rotating electrode method and gas atomization method) and physical-chemical methods, while the gas atomization method is divided into Traditional atomization technology (mainly including ultrasonic atomization technology, close-coupled atomization technology and high-pressure gas atomization technology) and new atomization technology (mainly laminar flow atomization technology, ultrasonic close-coupled atomization technology and thermal gas atomization technology) technology, which is currently in the research stage). Among them, the mechanical method is only suitable for the pulverization of brittle metals and alloys, while the physical-chemical method is difficult to apply to ...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the gas heating system and nozzles in hot gas atomization technology, there are few research reports on its atomization mechanism, nozzle design, powder performance, organizational structure and gas consumption.

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