Srinivas Mannepalli, Ravi Shankar Anne, Sublime Ningshen
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引用次数: 0
摘要
本研究旨在了解氮对碳化物析出的影响及其对保护金属电弧焊高氮 316SS 焊缝点腐蚀的影响。在焊缝中添加氮会减少铁素体中的铬可用位点，并增加附近奥氏体中的铬。虽然存在较高的碳和连续的铁素体与铁素体奥氏体模式，但在所有阶段都避免了敏化程度的变化，而且在 898 K/100 h 和 998 K/24 h 点蚀电位 (Epit) 发生了微小变化。在焊缝中添加氮进一步减少了铁素体和奥氏体中稳定凹坑的数量，被动膜的保护性受到铁素体和奥氏体中氮的影响，从而影响了凹坑的扩展。这导致了铁素体和奥氏体中的稳定凹坑，从而影响了热老化过程中凹坑的扩展。
Effect of Nitrogen on the Precipitation and Pitting Corrosion Susceptibility of High Nitrogen 316SS Weld
The present study aimed to understand the effect of nitrogen on the carbide precipitation and its influence on pitting corrosion of shielded metal arc welded high nitrogen 316SS weld. Nitrogen addition to weld reduces Cr availability sites in ferrite and enhances Cr in nearby austenite. Although higher carbon and continuous ferrite with ferritic austenitic mode exist, the changes in the degree of sensitisation were avoided at all the stages, and marginal changes in pitting potential (Epit) at 898 K/100 h and 998 K/24 h were observed. Nitrogen addition to weld further reduced the number of stable pits in ferrite and austenite, and the protectiveness of passive film was affected by nitrogen in ferrite and austenite, which affected pit propagation. This results in stable pits in ferrite and austenite, which affects pit propagation during thermal ageing.
期刊介绍：
Transactions of the Indian Institute of Metals publishes original research articles and reviews on ferrous and non-ferrous process metallurgy, structural and functional materials development, physical, chemical and mechanical metallurgy, welding science and technology, metal forming, particulate technologies, surface engineering, characterization of materials, thermodynamics and kinetics, materials modelling and other allied branches of Metallurgy and Materials Engineering.
Transactions of the Indian Institute of Metals also serves as a forum for rapid publication of recent advances in all the branches of Metallurgy and Materials Engineering. The technical content of the journal is scrutinized by the Editorial Board composed of experts from various disciplines of Metallurgy and Materials Engineering. Editorial Advisory Board provides valuable advice on technical matters related to the publication of Transactions.
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