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Proceedings Paper

Study on the activated laser welding of ferritic stainless steel with rare earth elements yttrium
Author(s): Yonghui Wang; Shengsun Hu; Junqi Shen
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Paper Abstract

The ferritic stainless steel SUS430 was used in this work. Based on a multi-component activating flux, composed of 50% ZrO2, 12.09 % CaCO3, 10.43 % CaO, and 27.49 % MgO, a series of modified activating fluxes with 0.5%, 1%, 2%, 5%, 10%, 15%, and 20% of rare earth (RE) element yttrium (Y) respectively were produced, and their effects on the weld penetration (WP) and corrosion resistant (CR) property were studied. Results showed that RE element Y hardly had any effects on increasing the WP. In the FeCl3 spot corrosion experiment, the corrosion rates of almost all the samples cut from welded joints turned out to be greater than the parent metal (23.51 g/m2 h). However, there was an exception that the corrosion rate of the sample with 5% Y was only 21.96 g/m2 h, which was even better than parent metal. The further Energy Dispersive Spectrometer (EDS) test showed the existence of elements Zr, Ca, O, and Y in the molten slag near the weld seam while none of them were found in the weld metal, indicating the direct transition of element from activating fluxes to the welding seam did not exist. It was known that certain composition of activating fluxes effectively restrain the loss of Cr element in the process of laser welding, and as a result, the CR of welded joints was improved.

Paper Details

Date Published: 15 October 2015
PDF: 6 pages
Proc. SPIE 9673, AOPC 2015: Micro/Nano Optical Manufacturing Technologies; and Laser Processing and Rapid Prototyping Techniques, 967306 (15 October 2015); doi: 10.1117/12.2199717
Show Author Affiliations
Yonghui Wang, Tianjin Key Lab. of Advanced Joining Technology (China)
Tianjin Univ. (China)
Chinergy. Co. Ltd. (China)
Shengsun Hu, Tianjin Key Lab. of Advanced Joining Technology (China)
Tianjin Univ. (China)
Junqi Shen, Tianjin Key Lab. of Advanced Joining Technology (China)
Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 9673:
AOPC 2015: Micro/Nano Optical Manufacturing Technologies; and Laser Processing and Rapid Prototyping Techniques
Lin Li; Minghui Hong; Lan Jiang, Editor(s)

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