Pulsed current plasma transferred arc hardfacing
Pulsed current plasma transferred arc hardfacing
复制标题
DOI：
10.1016/j.jmatprotec.2005.02.269
复制
发表时间：
2006-01-20
影响因子：
6.3
通讯作者：
Santos, RLC
中科院分区：
文献类型：
--
作者：
D'Oliveira, ASCM;Paredes, RSC;Santos, RLC
耐磨堆焊用于增强金属部件的表面性能，因为特殊设计的合金被表面焊接以实现特定的磨损性能。表面性能和质量取决于所选合金和焊接工艺。送粉等离子弧（PTA）允许均匀细化的微观结构、低变形和稀释，从而与用其他焊接技术处理的硬面沉积物相比，提高了表面性能。本文研究了脉冲电流对在碳钢和不锈钢上用PTA法沉积高碳钴合金的影响。结果表明，脉冲电流的使用导致组织更细，硬度更高，稀释率更低。基体钢的作用取决于所用的一组工艺参数，但对于同一组参数，它决定了涂层的微观结构特征。(c)2005 Elsevier B.V.保留所有权利。
Hardfacing is used to enhance surface properties of a metallic component, as a specially designed alloy is surface welded to achieve specific wear properties. Surface properties and quality depend upon the selected alloy and welding process. Powder feeding plasma transferred arc (PTA) allows for homogeneous refined microstructure, low distortion and dilution, resulting on enhanced surface properties when compared to hardfaced deposits processed with other welding techniques. This work evaluates the effect of pulsed current on an high carbon cobalt alloy deposited by PTA on carbon and stainless steel. Results showed that the use of pulsed current leads to a finer microstructure, higher hardness and lower dilution. The role of the substrate steel depends on the set of processing parameters used but for a same set of parameters it determines microstructural features of the coatings. (c) 2005 Elsevier B.V. All rights reserved.