Surface Nanocrystallization of Nb-Ti Stabilized 439M Ferritic Stainless Steel

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外文摘要：A new nanocrystallization process was designed,which included punching the surface coating to generate dislocation network or cells and recovery treatment to turn the dislocation cells into nano-sized grains.The effort was made to increase the service life of Nb-Ti stabilized 439M stainless steel surface with medium passive ability,particularly to enhance the outmost surface layer by nanocrystallization for improving resistances to corrosion.Electrochemical properties,electron work functions (EWFs),nano-mechanical properties of the nanocrystallized surfaces were investigated.It was demonstrated that the nanocrystallized 439M stainless steel surface exhibited improved resistance to corrosion in 0.5 mol/L H2SO4 solution.However,the nanocrystallized 439M stainless steel surface exhibited decreased resistance to corrosion in 3.5 ％ NaCl solution.

外文关键词：

nanocrystallizationcorrosionferritic stainless steelpunchingrecovery

作者：

Yao-chun ZHANG、Chao CHEN、Cheng-jia SHANG、Dong-yang LI

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作者单位：

Nuclear Equipment Division, CNNC China Nuclear Power Engineering Co., Ltd., Beijing 100840, China

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 2V4, Alberta, Canada

出版年：

2014

钢铁研究学报(英文版)

钢铁研究总院

钢铁研究学报(英文版)

CSTPCDCSCDSCI

影响因子：0.584

ISSN：1006-706X

年,卷(期)：2014.21(9)

参考文献量22