期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 35, 期 8, 页码 1747-1752出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2019.03.035
关键词
12MnNiVR pressure vessel steel; Electrogas welding; High heat input; Electron backscatter diffraction
资金
- National Natural Science Foundation of China [51622401, 51628402, 51861145312, 51861130361]
- National Key Research and Development Program of China [2016YFB0300602]
- Research Fund for Central Universities [N172502004]
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University [SKLSP201805]
- Global Talents Recruitment Program
- Jiangyin Xingcheng Special Steel Works Co., Ltd.
Microstructure features of 12MnNiVR pressure vessel steel welded joint deposited by the high heat input electrogas welding have been systematically investigated. It is revealed that the welded joint is featured by a heterogeneous juxtaposition. The coarse grained heat-affected zone (CGHAZ) primarily consists of lath bainites and minor granular bainites. The fine grained heat-affected zone (FGHAZ) is dominated by polygonal ferrites, pearlites, and fine cementite particles. Moreover, electron backscatter diffraction results further demonstrate that the CGHAZ is populated by coarse prior austenite grains (PAGs) with high frequency (61.3%) of low angle grain boundaries (LAGBs). On the other hand, the FGHAZ is filled with fine PAGs with a lower frequency (19.6%) of LAGBs. Such microstructural differences may likely contribute to differed mechanical properties for samples tested at designed positions. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据