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Laminar atomization flow technology
The German company etc. proposed a technology for laminar atomization. This technology offers significant improvements over conventional nozzles. The improved atomizing device has a high atomization rate, a narrow powder particle distribution, and 106-107K/s cooling speed. The copper, aluminum and 316L stainless-steel, etc., can be atomized under a 2.0MPa atomization force. Ar or Nitrogen is used to atomize the powder, with an average particle diameter of 10mm. It is a process that produces most metal powders and has a low gas usage. The technical control of this process is difficult. It is also unstable. And the output (metal mass flow rate less than 1kg/min), is low. This is not suitable for industrial production.
Ultrasonic tightly combined atomization technology
Close-coupled ultrasonic technology allows the nozzle to be optimized so that it has a higher mass flow rate and a faster airflow. When atomizing high-surface energy metals like stainless steel, the average size of the particles can reach around 20mm and the standard deviation can be as little as 1.5mm.
The technology can be used to produce amorphous, fast cooling powder or powder that is cooled quickly. The current development of this equipment shows that it is the next step in the development of tightly coupled technology. It can be applied to a wide range of materials such as alloy powders and micro stainless steel.
Hot gas atomization
In the last few years, an American company has done a lot research on the mechanism and effect of hot-gas atomization. In the United States, a company heated gas to 200-400degC under pressure of 1.72MPa to atomize silver and gold alloys. It found that the particle size and standard deviation decreased as the temperature increased. The hot gas atomization process is more efficient than traditional atomization, consumes less gas, and can be easily implemented on conventional atomization machines. It’s a promising technology.
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