射频感应等离子体制备球形钛粉的工艺研究
Preparation procedure for spherical titanium powders by RF induction plasma
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摘要: 采用单因素法对制备球形钛粉的工艺进行研究，通过控制和调节射频等离子体工作的阳极电流与电压、中气流量、边气流量、粉体携带气流量、抽风负压和钛粉送粉速率等参数，以获得制备球形度较佳的钛粉工艺参数。通过射频感应等离子体对粒度为(17.02.0) m的钛粉球化处理研究，制备出球形度好、球化率高、表面粗糙度低的钛粉，钛粉球化率随着抽风负压增加而增加，当抽风负压大于1 800 Pa时，钛粉的球化率随着抽风负压的增大迅速降低；同样钛粉球化率也随着钛粉送粉速率增加而增加，当钛粉送粉速率大于90.0 g/min时，钛粉的球化率随着钛粉送粉速率的增大而迅速降低。Abstract: The paper uses the single-factor method for the study of spherical titanium powder preparation process. Titanium powders with excellent sphericity can be prepared through controlling and regulating the radio frequency plasma anode working current and voltage, central gas flow rate, sheath gas flow rate, powder-carrying gas flow rate, negative ventilation pressure and powder feed rate, etc. Spheroidization of titanium powders with a size of (17.02.0) m is performed by radio frequency plasma technology. With the increase of negative ventilation pressure, the spheroidization rate of titanium powders increases firstly and then decreases rapidly at the turning point around 1 800 Pa. With the rate of powder feed increasing, the spheroidization rate of titanium powders incre
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