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Formation and Thermal Stability of Large Precipitates and Oxides in Titanium and Niobium Microalloyed Steel

ZHUO Xiaojun , WOO Daehee , WANG Xinhua , LEE Haegeon

钢铁研究学报(英文版)

Ascast CC slabs of microalloyed steels are prone to surface and subsurface cracking. Precipitation phenomena initiated during solidification reduce ductility at high temperature. The unidirectional solidification unit is employed to simulate the solidification process during continuous casting. Pr...

关键词: carbonitride;microsegregation;dendritic region;unidirectional solidification;heat treatment;thermal stability

NonMetallic Inclusion Distribution in Surface Layer of IF Steel Slabs

ZHANG Qiaoying , WANG Litao , WANG Xinhua , LI Hong , WANG Wanjun

钢铁研究学报(英文版)

Nonmetallic inclusion distribution in the surface layer of IF steel slabs during unsteady casting was investigated using the original position statistic distribution analysis (OPA) method. It was found that most nonmetallic inclusions larger than 10 μm existed in the subsurface layers of 05-35 m...

关键词: IF steel;transient casting;slab surface layer;nonmetallic inclusion

In Situ Observation of Solidification Process of AISI 304 Austenitic Stainless Steel

HUANG Fuxiang , WANG Xinhua , ZHANG Jiongming , JI Chenxi , FANG Yuan , YU Yan

钢铁研究学报(英文版)

The solidification process of AISI 304 stainless steel during cooling at a rate of 005 K/s has been observed in situ using a confocal scanning laser microscope (CSLM). The results show that the δ phase appeared first in liquid steel, as the temperature decreased, the γ phase precipitated prior at δ...

关键词: stainless steel;confocal scanning laser microscope;strip casting;ThermoCalc

Water Modeling of Optimizing Tundish Flow Field

LIU Jingang , YAN Huicheng , LIU Liu , WANG Xinhua

钢铁研究学报(英文版)

In the water modeling experiments, three cases were considered, ie, a bare tundish, a tundish equipped with a turbulence inhibitor, and a rectangular tundish equipped with weirs (dams) and a turbulence inhibitor. Comparing the RTD curves, inclusion separation, and the result of the streamline expe...

关键词: tundish;flow field;turbulence inhibitor;weir;dam;water modeling experiment

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