Continuous liquid supplying and atomizing preparing device for TiAl powder

Abstract

The invention discloses a continuous liquid supplying and atomizing preparing device for TiAl powder. The continuous liquid supplying and atomizing preparing device comprises a smelting furnace, an atomizing furnace, a vacuum system, a control system and an inert gas system. The smelting furnace is provided with a smelting crucible. A heat insulation crucible is arranged in the atomizing furnace. A liquid guide pipe stretches out of a smelting furnace body and enters an atomizing furnace body to convey melt in the smelting furnace into the heat insulation crucible. The bottom of the crucible of the atomizing furnace is connected to a liquid storage bag made of a fire-resisting material through a flow guide pipe. The bottom of the liquid storage bag is connected with a centrifugal nozzle through a flow guide pipe. The outer side of the centrifugal nozzle is provided with four liquid draining openings. The liquid draining openings are provided with electromagnetic valves in radio connection with a PLC control system. Four inert gas nozzles are correspondingly arranged on the periphery of the centrifugal nozzle. The directions of the inert gas nozzles are right opposite to the throwing-out directions of the melt of the liquid draining openings during rotation of the centrifugal nozzle. By means of the continuous liquid supplying and atomizing preparing device, due to a double-furnace separation manner, the melt is conveyed to the atomizing furnace through the smelting furnace, the vacuum atmosphere is kept in the atomizing furnace all the time, and it is ensured that powder preparing is conducted continuously.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a continuous liquid supply atomization preparation device for TiAl powder. Background technique [0002] Titanium alloy has low density, high strength, high hardness, strong high temperature resistance, high corrosion resistance and friction resistance, especially TiAl intermetallic compound because of its high specific strength, high specific stiffness, corrosion resistance, wear resistance and high temperature resistance As well as excellent oxidation resistance and other advantages, it is becoming one of the excellent candidate structural materials in the contemporary aerospace industry, civil industry and other fields, especially in the field of aeroengine blades, which has broad application prospects. 3D printing, or additive manufacturing, is a rapid prototyping process that has emerged in recent years. It adopts layer-by-layer powder coating, laser ...

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Problems solved by technology

Part of the more advanced technology uses the centrifugal method to atomize the melt after being thrown out. In the process of using centrifugal throwing, the inventor has found through research that the blowing speed and angle of the gas in the atomization process after the melt is thrown out, the liquid The direction of the flow all affects the atomization effect and the particle size of the powder after atomization, but the current centrifugation process adopts the method of blowing air after continuous centrifugation, so that the particle size distribution of the prepared powder is uneven, At the same time, the process of atomization powder making involves sealing, vacuuming, heating, liquid supply, atomization, vacuum breaking and other processes, and the required period is very long. If the intermittent feeding method is used, the above-mentioned steps need to be repeated every time. process, which seriously reduces the milling efficiency

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