Process improvement in laser hot wire cladding for martensitic stainless steel based on the Taguchi method
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- 作者：Zilin Huang ; Gang Wang ; Shaopeng Wei ; Changhong Li…
- 关键词：process optimization ; Taguchi method ; signalto ; noise (S/N) ratio ; volumetric defect ratio ; laser hot wire cladding
- 刊名：Frontiers of Mechanical Engineering
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：11
- 期：3
- 页码：242-249
- 全文大小：2,364 KB
- 刊物类别：Engineering
- 刊物主题：Mechanical Engineering
Chinese Library of Science - 出版者：Higher Education Press, co-published with Springer-Verlag GmbH
- ISSN：2095-0241
- 卷排序：11
文摘
Laser hot wire cladding, with the prominent features of low heat input, high energy efficiency, and high precision, is widely used for remanufacturing metal parts. The cladding process, however, needs to be improved by using a quantitative method. In this work, volumetric defect ratio was proposed as the criterion to describe the integrity of forming quality for cladding layers. Laser deposition experiments with FV520B, one of martensitic stainless steels, were designed by using the Taguchi method. Four process variables, namely, laser power (P), scanning speed (Vs), wire feed rate (Vf), and wire current (I), were optimized based on the analysis of signal-to-noise (S/N) ratio. Metallurgic observation of cladding layer was conducted to compare the forming quality and to validate the analysis method. A stable and continuous process with the optimum parameter combination produced uniform microstructure with minimal defects and cracks, which resulted in a good metallurgical bonding interface.