Analysis of Inclusions with Unqualified Z-direction Performance of Heavy Bridge Plates

DOI

10.2991/cmfe-15.2015.97How to use a DOI?

Keywords

Q370qEZ35; Heavy plate; Z-direction performance; Fracture morphology; Cause analysis

Abstract

By using the analysis tools of scanning electron microscope (SEM) and energy dispersive X-ray (EDX), the reason for the disqualified Z-direction performance of a 60mm Q370qEZ35 heavy steel plate was investigated. The results showed that the disqualified Z-direction performance of Q370qEZ35 was due to the presence of a large number of inclusions, the types of which were mainly massive and strip-like (Nb, Ti)C and metal Nb inclusions as well as spherical oxide (MgO, Al2O3, etc.) and sulfide inclusions (CaS, MnS). The cause of various types of inclusions and the impact on the Z-direction property was analyzed, and the corresponding improvement measures were put forward from smelting, casting and rolling and cooling process, such as controlling the amount and adding time of Nb and Ti, extending the refining time, controlling the superheat temperature, optimizing the process of heating, rolling and cooling, etc., and finally, we achieved good results.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Haihe Luo
AU  - Zhanzeng Liu
AU  - Hanxiong Dong
AU  - Fu Chen
PY  - 2015/07
DA  - 2015/07
TI  - Analysis of Inclusions with Unqualified Z-direction Performance of Heavy Bridge Plates
BT  - Proceedings of the International Conference on Chemical, Material and Food Engineering
PB  - Atlantis Press
SP  - 412
EP  - 415
SN  - 2352-5401
UR  - https://doi.org/10.2991/cmfe-15.2015.97
DO  - 10.2991/cmfe-15.2015.97
ID  - Luo2015/07
ER  -