Alloy82銲道微結構與沿晶腐蝕阻抗之研究

Hwa-Teng Lee, Te Chen Liu

研究成果: Article同行評審

摘要

An investigation is performed into the grain boundary character distribution (GBCD), degree of sensitization (DOS), and intergranular corrosion (IGC) resistance of Alloy 82 overlay welds prepared using a manual gas tungsten arc welding (GTAW) process. Four different weldments are considered, namely as-welded (AW), sensitized (AW+SEN), solution-annealed (SS), and solution-annealed and then sensitized (SS+SEN). The results show that approximately 67.9% and 212.4 cm/cm2 of the grain boundaries in the weldments were prepared by GTAW process found AW specimens are high-angle boundaries (>15°). These boundaries prompt the precipitation of fine Cr-carbides during sensitization treatment, and therefore cause the formation of Cr-depletion zones close to the grain boundary. Consequently, the AW+SEN weldment has a high DOS. By contrast, AW+SEN welds are processed using a laser surface melting (LSM) technique with a continuous CO 2 laser beam and scanning speeds in the range of 0.8~1.2 m/min. It is shown that the LSM treatment could improve IGC and pitting corrosion resistance of the overlay weld mainly by reducing the amounts of fine precipitates along the subgrain boundaries of sensitized weld.

貢獻的翻譯標題Microstructure and Intergranular Corrosion Resistance Evaluation of Alloy 82 Weldments
原文???core.languages.zh_ZH???
頁(從 - 到)131-143
頁數13
期刊Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao
39
發行號2
出版狀態Published - 2018 四月 1

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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