Pulsed Laser Weldability of Hastelloy C-276: Corrosion-Resistant Property

摘要

Based on the welding require of Hastelloy C-276 in theindustry, the pulsed laser welding of 0.5 mm thicknessHastelloy C-276 was investigated, and the smoothweld joint with refined grain was obtained. Then, thedefect in the weld joint was tested by the X-Ray flawdetection and micro-examination, and the corrosionresistantproperty of weld joint was evaluated via thestrong acid and electrochemistry corrosion. By the XRayflaw detection, there were not obvious defects inthe weld joint, and just two micro-pores were foundduring the micro-examination. In addition, thecorrosion-resistant property of the weld joint in thestrong acid corrosion was nearly the same as that of thebase metal. The polarization curve in the weld joint,resulted from the electrochemistry corrosion test, wasfound a little difference from that of base metal. Theresults indicated, for the thin Hastelloy C-276 sheet,using the pulsed laser welding could obtain the wellweld joint with little defect, and the corrosion-resistantproperty was impacted by the pulsed laser weldingprocess.