Microstructure and pitting corrosion of shielded metal arc welded high nitrogen stainless steel

查看全文 作　　者：RAFFI [1]MOHAMMED;G.MADHUSUDHAN [2]REDDY;K.SRINIVASA [1]RAO

机构地区：[1]Department of Metallurgical Engineering,Andhra University;[2]Defence Metallurgical Research Laboratory

出　　处：《Defence Technology(防务技术)》索引2015年第11卷第3期,共7页

摘　　要：The present work is aimed at studying the microstructure and pitting corrosion behaviour of shielded metal arc welded high nitrogen steel made of Cromang-N electrode. Basis for selecting this electrode is to increase the solubility of nitrogen in weld metal due to high chromium and manganese content. Microscopic studies were carried out using optical microscopy(OM) and field emission scanning electron microscopy(FESEM). Energy back scattered diffraction(EBSD) method was used to determine the phase analysis, grain size and orientation image mapping. Potentio-dynamic polarization testing was carried out to study the pitting corrosion resistance in aerated 3.5% NaCl environment using a GillAC electrochemical system. The investigation results showed that the selected Cr-Mn-N type electrode resulted in a maximum reduction in delta-ferrite and improvement in pitting corrosion resistance of the weld zone was attributed to the coarse austenite grains owing to the reduction in active sites of the austenite/delta ferrite interface and the decrease in galvanic interaction between austenite and delta-ferrite. 关键词：耐点蚀性能高氮不锈钢焊缝金属电弧焊接研究组织屏蔽场发射扫描电子显微镜奥氏体晶粒

相关文献

参考文献（10）
引证文献（8）
耦合文献（0）

参考文献(10)

引证文献(8)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Microstructure and pitting corrosion of shielded metal arc welded high nitrogen stainless steel

参考文献(10)

引证文献(8)

用户提示