Journal
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
Volume 25, Issue 2, Pages 164-172Publisher
JOURNAL IRON STEEL RESEARCH EDITORIAL BOARD
DOI: 10.1007/s42243-018-0022-6
Keywords
Inclusion; Zr; Acicular ferrite; Shipbuilding steel; Evolution behavior
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Funding
- National Natural Science Foundation of China [51622401, 51628402]
- National Key Research and Development Program of China [2016YFB0300602]
- Global Talents Recruitment Program (1000 Plan)
- Research Fund for Central Universities [N150205001]
- Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences [2015KF04]
- State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology [AWJ-16-Z04]
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The inclusions evolution behavior in the continuous casting slab, rolled plates, and simulated welding samples of EH36 steels with and without Zr addition has been systematically investigated. The inclusions in plain EH36 steel are almost composed of Al-Ca-S-O(-Mn) and undergo negligible changes during the whole process. With Zr addition, a large amount of individually fine MnS precipitates and Zr-containing inclusions are generated. In the rolled EH36-Zr sample, Zr-containing complex inclusions are effective to promote the nucleation of acicular ferrite on the surface, which are hardly found in the simulated welding sample of EH36-Zr steel due to the segregation of soluble Ti and Zr on the grain boundary.
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