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

作　　者：古忠涛[1] 叶高英[2] 金玉萍[1] 

机构地区：[1]西南科技大学制造科学与工程学院,四川绵阳621010 [2]西南物理研究院,成都610041

出　　处：《强激光与粒子束》2011年第12期3353-3357,共5页High Power Laser and Particle Beams

基　　金：西南科技大学博士基金项目(11zx7109)

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(17.0±2.0)μm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 800Pa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90.0g/min时,钛粉的球化率随着钛粉送粉速率的增大而迅速降低。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（17.0±2.0） μm 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 increases firstly.When the powder feed rate is greater than 90.0 g/min,the spheroidization rate of titanium powders reduces rapidly as the powder feed rate increases.

关 键 词：射频感应等离子体 等离子体炬 球形粉末 球化率 钛粉 

分 类 号：TF123[冶金工程—粉末冶金]