Microstructural Analysis of Electron Beam Cladded Surface Layers Using Co‐ and Fe‐Enriched Additives
Microstructural Analysis of Electron Beam Cladded Surface Layers Using Co‐ and Fe‐Enriched Additives
复制标题
使用富钴和富铁添加剂的电子束熔覆表面层的微观结构分析
DOI：
10.1002/adem.201300507
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发表时间：
2014
影响因子：
3.6
通讯作者：
Kristina Lerche
中科院分区：
文献类型：
--
作者：
A. Jung;R. Zenker;Joachim Lerche;Kristina Lerche
本文介绍了一种在奥氏体钢(如X6CrNiMoTi17-12-2)和双相钢(如X2CrNiMoN22-5-3)上沉积一定厚度的熔覆层的电子束表面处理技术。应用的熔覆层改变了材料的微观结构，从而改变了材料表面层的性能，从而实现了机械性能的显著改善。使用的钴和铁基添加剂是通过电子束(EB)以线状热沉积到基材上的。以这种方式生产的涂层没有裂纹和气孔，并与衬底材料牢固地冶金结合。根据熔覆层对衬底材料的微观结构的修改以及它们对硬度的影响来评估熔覆层。由于电子束应用过程中的高加热和高冷却速度，产生了极其细小的树枝状组织，添加元素均匀分布，基材含量在19%到37%之间。从而实现了基材硬度的2至3倍的增加。
In this report, an electron beam surface treatment technology is introduced by which applies a cladding layer of defined thickness is deposited on an austenitic steel (e.g., X6CrNiMoTi17‐12‐2) and a duplex steel (e.g., X2CrNiMoN22‐5‐3). The applied cladding alters the microstructure and, thus, the properties of the material's surface layer in such a way that a considerable improvement in mechanical properties is achieved. The Co‐ and Fe‐based additives used are deposited thermally to the base material in wire form by means of an electron beam (EB). The layer produced in this manner is free of cracks and pores, and is firmly bonded metallurgically to the substrate material. The cladding layers are evaluated with respect to their modification of the microstructure of the substrate material, and with respect to their effect on hardness. As a result of the high heating and cooling rates during EB application, an extremely fine, dendritic microstructure with homogenously distributed additive elements and low substrate material contents of between 19 and 37% is produced. An increase in hardness of between 2 and 3 times the hardness of the substrate material is thereby achieved.