中南大学学报（自然科学版）2018，Vol.49Issue(1)：64-71,8.DOI:10.11817/j.issn.1672-7207.2018.01.009
氩气雾化René104镍基高温合金粉末的 显微组织和凝固缺陷
Microstructure and solidification defect of René104 nickel-base superalloy powder atomized by argon gas atomization
摘要
Abstract
The René104 (or ME3) nickel-base superalloy powder was prepared by argon gas atomization, and its size distribution, morphology, microstructure and solidification defect were investigated. The results show that the as-atomized powder possesses a relatively low oxygen content, and most of powders are spherical or nearly spherical. The fine powder yield with the as-atomized powder particle size below 75 μm is up to 70％. The powder below 60 μm shows a homogeneous composition, smooth surface and compact structure, presenting a typical cellular morphology. With the increase of particle size, the dendrite appears both on the surface and inside of the powder, and its microstructure shows the both cellular and dendrite morphology. In these powders, the dispersed shrinkage cavity and hollow defects gradually emerge, while this phenomenon is particularly obvious for the powder with particle size above 75 μm.关键词
氩气雾化/镍基高温合金/凝固组织/空心粉末Key words
argon gas atomization/nickel-base superalloy/solidification structure/hollow powder分类
矿业与冶金引用本文复制引用
苏鹏飞,刘祖铭,郭旸,麻梦梅,段然曦,陈仕奇..氩气雾化René104镍基高温合金粉末的 显微组织和凝固缺陷[J].中南大学学报（自然科学版）,2018,49(1):64-71,8.基金项目
国家高技术研究发展计划(863 计划)项目(2009AA03Z526) （863 计划）
中南大学创新驱动项目(2015CX004) (Project(2009AA03Z526) supported by the National High-Tech Research and Development Program (863 Program) of China （2015CX004）
Project(2015CX004) supported by the Innovation-Driven Plan of Central South University) （2015CX004）
