Production method for low oxygen spherical metal powder using dc thermal plasma processing

摘要: PROBLEM TO BE SOLVED: To provide a production method for low oxygen spherical metal powders with its content controlled to the amount of 1000 ppm or less by DC thermal plasma processing. SOLUTION: This is containing oxygen, using power supply generate through which raw material are passed and processed. The operation gas this uses mixed comprising an inert having purity 99.9% more in volume hydrogen volume. 0.5-20 vol.% gas. Under maximum temperature zone pass my be retained at melting point powder higher but not than 10000 deg.C. Furthermore, it may possible combine conditions mentioned above. In concrete, any practice should control less.