等离子熔覆快速成形铁基合金的设计及其组织和性能评价  

Fe-based Alloy Design in Rapid Prototyping by Plasma Arc Overlaying and Its Structure and Performance Investigation

作　　者：向永华[1] 徐滨士[1] 吕耀辉[1] 姜祎[1] 夏丹[1] 刘存龙[1] 

机构地区：[1]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《中国表面工程》2010年第4期39-43,共5页China Surface Engineering

基　　金：国家自然科学基金(50735006;50675223);国家973计划(2007CB607601);国家科技支撑计划(2008BAK42B03);再制造重点实验室基金(No9140C8502026JS9105)资助

摘　　要：研制适用于快速成形多层熔覆条件下的专用合金材料,是当前直接金属快速成形领域的研究热点。文中总结了等离子熔覆快速成形铁基合金的设计原则,在大量试验的基础上,设计出了一种等离子熔覆快速成形新型铁基合金,并对成形件进行了组织性能评价,为该材料的工程应用打下基础。结果表明,冶金层组织主要以固溶体结晶为主,显微硬度从表面到基体呈U形分布,合金粉末具有优良的成形性和抗裂性,能够满足快速成形多层熔覆的要求。The special materials study applied for multi-layer overlay in rapid prototyping becomes the research hot spot in direct metal rapid prototyping field. This paper generalized the design principle of rapid prototyping alloy used in plasma arc overlaying. Based on a large number of tests, new Fe-based alloy applied in rapid prototyping by plasma arc has been designed. Microstructure and performance of the alloy coating has been analyzed, which is benefit for the practical application of this new material. Res...

关 键 词：等离子熔覆 快速成形 铁基合金设计 

分 类 号：TG174.442[金属学及工艺—金属表面处理]