等离子束表面冶金中熔体的流动特征及影响  

The Flow Characteristics and Influence of the Molten Bath on DC-Plasma-Jet

作　　者：孙玉宗[1] 李惠琪[1] 于洪爱[1] 李惠东[2] 李敏[1] 

机构地区：[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

出　　处：《新技术新工艺》2007年第1期37-40,共4页New Technology & New Process

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1层均匀致密、结合牢固的冶金涂层,实现涂层与金属基体的冶金结合,具有表面冶金结合、成分可调范围大、不需要前处理、效率高、成本低、冶金层质量好等优点,适合于处理一些既耐冲击又需要耐磨耐腐蚀的金属零件,是一种极有发展前途的金属表面改性处理新技术。重点讨论了在等离子表面冶金中金属熔体三维流动特征,并以Fe基粉末为例,研究了流动对凝固组织及冶金层成分分布的影响。The uniform compact metallically coating is obtained by DC-Plasma-Jet surface metallurgy.The heat source of DC-Plasma-Jet feeding surface metallurgical technology is plasma beam.The technology is a kind of promising surface technology on the metal base,because of the merits:thick metallurgical coating,vast adjustable extent of the component,unwanted fore treatment,high efficiency,low cost and good quality.It is fit for strengthening the wearing resistance and the erosion resistance of the metal parts.The paper analyses the three dimensional qusai-state of fluid flow as well as the influence of the freezing structure and the coating component distribution due to the fluid flow.

关 键 词：等离子束表面冶金 流动 凝固组织 成分分布 

分 类 号：TG174[金属学及工艺—金属表面处理]