引用本文:孙玉宗,李惠琪,于洪爱,李惠东 ,李 敏.等离子束表面冶金过程中熔体流动对凝固组织的影响[J].中国表面工程,2006,(5):22~25
SUN Yu-zong, LI Hui-qi, YU Hong-ai, LI Min, LI Hui-dong.The Influence of Molten Flow in Metallurgical Process of plasma spraying on the Solidified Microstructure[J].China Surface Engineering,2006,(5):22~25
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等离子束表面冶金过程中熔体流动对凝固组织的影响
孙玉宗,李惠琪,于洪爱,李惠东 ,李 敏1,2
1. 山东科技大学 材料学院,山东 青岛 266510;2. 北京科技大学 材料科学与工程学院,北京 100083
摘要:
等离子束表面冶金技术是以等离子弧为热源,采用同步送粉方式,在基体材料表面获得一层均匀致密、结合牢固的冶金涂层,是一种极有发展前途的金属表面改性处理新技术。研究表明在等离子表面冶金中金属熔体流动存在很大的温度梯度以及气流的吹力、等离子束的冲击力和电磁力的搅拌作用,这种流动特征对凝固组织和冶金层成分产生很大的影响,对优化等离子束表面冶金工艺具有重要指导意义。
关键词:  等离子束表面冶金  流动  凝固组织  成分分布
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The Influence of Molten Flow in Metallurgical Process of plasma spraying on the Solidified Microstructure
SUN Yu-zong, LI Hui-qi, YU Hong-ai, LI Min, LI Hui-dong1,2
1.School of Materials Science, Shandong University of Science and Technology, Qingdao 266510 China;2. School of Materials Science& Engineering, Beijing University of Science and Technology, Beijing 100083
Abstract:
The uniform and compact metallurgical coating can be obtained by DC-Plasma-spray process,which is a promising surface Technique for surface modification.The researches indicate that the characteristics of molten flow can play roles of two aspects:1)providing a blowing force of air flow,2)providing impulsive force of ion beam and electromagnetic stirring action.These characteristics have great effect on thesolidified microstructure and composition of coating,which is of great significance to optimize the technology of DC-Plasma spraying surface metallurgy process.
Key words:  DC-Plasma-Spraying surface metallurgy  fluid flow  solidified structure  composition distribution
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