METHOD FOR MANUFACTURING METALLIC POWDER WITH WATER ATOMIZATION METHOD

• Main Authors: NODA TATSUSHI, SHIMIZU SHIGETO, ITO SHIGEJI, OGAWA NORIHIRO
• Format: Patent
• Language: English
• Published: 09.03.2006
• Subjects: CASTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

PROBLEM TO BE SOLVED: To provide a method for manufacturing a metallic powder with a water atomization method, which inexpensively manufactures the metallic powder containing little oxygen. SOLUTION: This manufacturing method comprises: making an inert-gas-supplying chamber 16 communicate with a chamber 18 for collecting the metallic powder through a through hole 20; keeping the inside of a chamber 18 into an inert gas atmosphere, by supplying an inert gas to the inert-gas-supplying chamber 16; in the state, making a drooping flow 32 of a molten metal 30 pooled in a tundish 12 flow downward into the chamber 18 through the through hole 20; and jetting high-pressure water to the drooping flow 32 of the molten metal 30. At this time, a ratio of a flow rate (m3/min) of the inert gas sent to the inert-gas-supplying chamber 16, to the flow rate (kg/min) of the molten metal 30 sent to the inert-gas-supplying chamber 16 is set so as to satisfy 0.1≤ flow rate of inert gas/flow rate of molten metal 30 ≤0.4. COPYRIGHT: (C)2006,JPO&NCIPI