氮對雙相不銹鋼機械性質與耐蝕性質之影響

Effects of Nitrogen on Mechanical Properties and Corrosion Properties of Duplex Stainless Steels

施嘉昌(C.C. Shih) ； 黃祺祥(C.S. Huang)

《鑛冶：中國鑛冶工程學會會刊》 48卷2期 (2004/06) Pp. 106-113

https://doi.org/10.30069/MM.200406_48(2).0007

摘要

雙相不銹鋼具有兩相組織，由約等量的沃斯田鐵與肥粒鐵組成，其機械性質與耐蝕性質也比一般不銹鋼來得好。經由本實驗發現，添加氮於雙相不銹鋼中可提升其抗拉強度與降伏強度，並且同時增加些微的延伸率，對於機械性質有雙重的好處。添加氮也可增加耐間隙腐蝕能力，但是於硫酸環境中反而會增加均勻腐蝕速率，所以這是一個有趣的研究題材。因此，本實驗除了測試不同氮含量對雙相不銹鋼機械性質的影響之外，也將了解氮對雙相不銹鋼的間隙腐蝕與均勻腐蝕有何影響。

關鍵字

雙相不銹鋼 ； 間隙腐蝕 ； 均勻腐蝕

並列摘要

Duplex stainless steels possess a two-phase microstructure, comprising approximately equivalent volume fraction of austenite and ferrite. The mechanical properties and corrosion resistance of duplex stainless steels are better than that of coventional stainless steels. In this experiment, addition of nitrogen in duplex stainless steel may increase ultimate tensile strength and yield strength, and increase slightly elongation simultaneously. Addition of nitrogen also can increase resistance of crevice corrosion, but it would increase the uniform corrosion rate in the environment with sulfuric acid. SO this is an interesting subject to research. Therefore, the purpose of this paper is to study the effects of different nitrogen contents on mechanical properties of duplex stainless steel, and also to understand the effects of nitrogen in crevice corrosion and uniform corrosion of duplex stainless steel.

並列關鍵字

Duplex stainless steel ； Crevice corrosion ； Uniform corrosion