KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽

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KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽 KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽 KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽 KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽 KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽 KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽 KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽 KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽 KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽 KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽 KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽

KOVO프로토 ▷▷▷ ＧＵＵ69，cＯm (카톡: XAZA)▷▷▷ KOVO유료픽 KOVO분석픽

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Pin holes as a surface defect, and blow holes as an inner defect, occur in billet / bloom / beam blank casting, particularly for Si-Mn killed steel cast with metering nozzle and oil lubrication. If they are present in abundance or have a large size, they may originate defects in the rolled products. Their characteristics, factors behind their formation, as well as usual processing conditions that promote their occurrence are discussed. Finally, the evolution of these defects during reheating and rolling is analyzed, with industrial examples.

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Processes of inclusions formation during steel reoxidizing were investigated by computer simulation and SEM analysis of oxide inclusions in steel samples. The thermodynamic-based model of interaction between oxide inclusions and liquid metal in the line of equilibrium state and program for computation of inclusions transformation are developed. For Al- and Si-killed steels trajectories of change of inclusions chemical composition from initial FexO phase formed during reoxidation to final inclusions oxide phases were computed. Those finals phases are: heterogeneous inclusions (grains of hard spinals solution |MnO.Al2O3,FeO.Al2O3| + interlayers from phase based on MnO–SiO2–Al2O3 system, and Al2O3 cover) in LCAK-steel with Si content 0.01 wt. pct; hard inclusions based on Al2O3–MnO–SiO2 system in LCAK-steel with Si content 0.2 wt. pct, manganese silicates in medium carbon Si-killed steel. Computer simulation of inclusion transformation in LCAK-steel showed that Si significantly increases a time of transformation from initial liquid phase FexO to hard phases. It explains the well-known fact that LCAK-steels with Si > 0.1 wt. pct has better castability than low silicon ones.

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$Refractories$ $Refractories$

Refractories

Steel and effect of alloying elements

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International logistics

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Casting procedure & defects

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Simulation of non metallic inclusions formation during liquid steel reoxidizing

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Personal Development

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