Preparation method of fine particle size spherical 18Ni300 powder

• Main Authors: QU ZONGHONG, SONG JIAMING, ZHANG PINGXIANG, LAI YUNJIN, WANG QINGXIANG, LIANG SHUJIN, KANG LU
• Format: Patent
• Language: Chinese; English
• Published: 26.10.2018
• Subjects: CASTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

The invention discloses a preparation method of fine particle size spherical 18Ni300 powder. The preparation method comprises the following steps: 1, carrying out finish machining on 18Ni300 alloy bar; 2, placing the processed 18Ni300 alloy bar in an airtight furnace chamber protected by inert gas, enabling the alloy bar to rotate at a high speed, adopting a plasma gun to heat the end part of an electrode bar so as to melt the end part, applying strong inert gas flow at the melting end of the bar, under the dual action of the centrifugal force and the airflow impact force, enabling the moltenmetal to fly out of the end part of the electrode bar, enabling the liquid drops to rapidly cool to form spherical particles in the inert gas environment, and enabling the spherical particles to fallinto a collector at the bottom of the furnace chamber; and 3, under the protection of inert gas, screening the obtained spherical alloy powder to obtain the spherical 18Ni300 alloy powder with the demanded particle size. With