文献类型：会议论文

英文题名：Correlation between Microstructure, Hardness and Corrosion of Welded Joints of Disc Rotors

作者：Weng, S.[1];Huang, Y. H.[1];Xuan, F. Z.[1];Luo, L. H.[1]

机构：[1]E China Univ Sci & Technol, Key Lab Safety Sci Pressurized Syst, MOE, Sch Mech Engn, 130 Meilong St, Shanghai 200237, Peoples R China

会议论文集：14th International Conference on Pressure Vessel Technology (ICPVT)

会议日期：SEP 23-26, 2015

会议地点：Chinese Pressure Vessel Inst, Shanghai, PEOPLES R CHINA

主办单位：Chinese Pressure Vessel Inst

语种：英文

外文关键词：welded rotor; microstructure; hardness distribution; corrosion resistance

摘要：In the present work, correlation between microstructure, hardness and corrosion was investigated in the three different zones including base metal (BM), heat affected zone (HAZ) and weld metal (WM) of welded rotors in terms of the traditional micro hardness testing and the potentiodynamic polarization experiments. The results revealed that Micro-hardness did not only depend on the content of martensites, since the hardness of WM was higher than that of BM, but the martensites content of BM was much more than that in WM. The precipitation of carbides increased as the width of lathy tempered martensites grows larger, which caused the hardness increasing and the corrosion resistance decreasing. In addition, with the decreasing of the grain size, the higher the hardness value and the corrosion resistance were increasing. (C) 2015 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the organizing committee of ICPVT-14