Preparation and structures properties of atomized cobalt-alloy powders with low ozygen content
Based on the introduction of preparation process of the argon-gas atomized spherical cobalt-alloy powders with low oxygen con tent,the oxygen content,granularity and distribution characteristic of the alloy powders after Zr micro-alloying treatment were discussed,and properties of the alloy powders,such as oxygen content,fluidity and apparent density,et. Al.were tested,plus appearance and struc ture were analyzed in the paper. The results show that very fine granularity,low oxygen pickup,spherical shape,good fluidity and high apparent density are the main characteristics of the prepared powders,and the powders contain some hollow particles,but with decreasing granularity of the powder,content of the hollow particles is decreased.Structure of the powders without Zr micro-alloying treatment mainly is dentrite,after Zr micro-alloying treatment,dentrite content of the powders surface is decreased,part of isometric crystal appears,mo reover,space between sub-dendrite is decreased,and length of dendrite also is reduced.In additon,carbide is separated on the surface of the powder,and structure of the powders is related with the granularity,smaller granularity and lower cooling speed make the transform from dendrite to isometric crystal.
argon-gas atomization cobalt-alloy ozygen content microstructure physical properties
YANG Xiaohua REN Xianjing WANG Hui
Beijing General Research Institute of Mining & Metallurgy,Beijing 100044,China
国际会议
The 10th China-Russia System on Advanced Materials and Technologies(第十届中俄新材料新工艺研讨会)
浙江嘉兴
英文
455-459
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）