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Article

Inclusion Evolution Behavior of Ti-Mg Oxide Metallurgy Steel and Its Effect on a High Heat Input Welding HAZ

1
State Key Laboratory of Rolling and Automation, Northeastern University, NO. 3-11, Wenhua Road, Heping District, Shenyang 110819, Liaoning, China
2
Handan Iron & Steel Group Co., Ltd., No. 232, Fuxing Road, Fuxing Distirct, Handan 056015, Hebei, China
*
Author to whom correspondence should be addressed.
Metals 2018, 8(7), 534; https://doi.org/10.3390/met8070534
Received: 6 June 2018 / Revised: 3 July 2018 / Accepted: 9 July 2018 / Published: 11 July 2018
(This article belongs to the Special Issue 5th UK-China Steel Research Forum)
We have studied here the evolution of inclusions in ladle furnace (LF), Ruhrstahl & Heraeus furnace (RH), and simulated welded samples during Ti-Mg oxide metallurgy treatment and the mechanical properties of the heat-affected zone (HAZ) after high heat input welding. The study indicated that inclusions in an LF furnace station are silicomanganate and MnS of size range ~0.8–1.0 μm. After Mg addition, fine Ti-Ca-Mg-O-MnS complex oxides were obtained, which were conducive to the nucleation of acicular ferrite (AF). The corresponding microstructure changed from ferrite side plate (FSP) and polygonal ferrite (PF) to AF, PF, and grain boundary ferrite (GBF). After a simulated welding thermal cycle of 200 kJ/cm, disordered arrangements of acicular ferrite plates, fine size cleavage facets, small inclusions, and dimples all promoted high impact toughness. View Full-Text
Keywords: Ti-Mg oxide metallurgy; inclusion; microstructure; heat-affected zone Ti-Mg oxide metallurgy; inclusion; microstructure; heat-affected zone
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MDPI and ACS Style

Lou, H.-N.; Wang, C.; Wang, B.-X.; Wang, Z.-D.; Li, Y.-Q.; Chen, Z.-G. Inclusion Evolution Behavior of Ti-Mg Oxide Metallurgy Steel and Its Effect on a High Heat Input Welding HAZ. Metals 2018, 8, 534. https://doi.org/10.3390/met8070534

AMA Style

Lou H-N, Wang C, Wang B-X, Wang Z-D, Li Y-Q, Chen Z-G. Inclusion Evolution Behavior of Ti-Mg Oxide Metallurgy Steel and Its Effect on a High Heat Input Welding HAZ. Metals. 2018; 8(7):534. https://doi.org/10.3390/met8070534

Chicago/Turabian Style

Lou, Hao-Nan, Chao Wang, Bing-Xing Wang, Zhao-Dong Wang, Yu-Qian Li, and Zi-Gang Chen. 2018. "Inclusion Evolution Behavior of Ti-Mg Oxide Metallurgy Steel and Its Effect on a High Heat Input Welding HAZ" Metals 8, no. 7: 534. https://doi.org/10.3390/met8070534

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