Journal
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
Volume 49, Issue 2, Pages 481-489Publisher
SPRINGER
DOI: 10.1007/s11663-017-1163-x
Keywords
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Funding
- National Key Research and Development Program of China [2016YFB0300602]
- 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]
- National Natural Science Foundation of China [51622401, 51628402]
- Research Fund for Central Universities [N150205001]
- Global Talents Recruitment Program
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Inclusion evolution behaviors, in terms of composition, size, and number density, and associated influence on the microstructures of the as-cast slabs, rolled plates, and simulated welded samples of plain EH36 and EH36-Mg shipbuilding steels have been systematically investigated. The results indicate that the inclusions in the as-cast plain EH36 are almost Al-Ca-S-O-(Mn) complex oxides with sizes ranging from 1.0 to 2.0 mu m. After Mg addition, a large amount of individually fine MnS precipitates and Mg-containing Ti-Al-Mg-O-(Mn-S) complex inclusions are generated, which significantly refine the microstructure and are conducive to the nucleation of acicular ferrite in the rolled and welded sample. Moreover, after rolling and welding thermal simulation, the number of individual MnS decreases gradually due to its precipitation on the surface of Ti-Al-Mg-O oxides.
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