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- W2896481036 abstract "The modification mechanism of cerium (Ce) on oxides and multilayer carbontrides in H13 steel is investigated by industrial trials and thermodynamic calculations. The morphology, composition, and size of inclusions are analyzed by scanning electron microscopy and energy dispersive spectroscopy. The main inclusions in H13 steel without Ce content in the molten steel are MgAl 2 O 4 spinel inclusions and multilayer carbonitrides. The carbonitrides have a multilayer structure in which MgAl 2 O 4 acts as the nucleation core and the second layer is (Ti, V)(C, N). As the cerium content in molten steel increases from 0 to 0.03 wt%, the MgAl 2 O 4 is effectively modified into cerium oxide (Ce–O) and cerium oxy‐sulfide (Ce–O–S), and the evolutionary process is as follows: MgAl 2 O 4 → CeAlO 3 → Ce–O and Ce–O–S. Likewise, the structure of multilayer carbonitrides in the H13 steel also changed. The MgAl 2 O 4 and CeAlO 3 act as heterogeneous nucleation cores of multilayer carbonitrides. However, Ce–O and Ce–O–S can effectively inhibit the heterogeneous nucleation of carbonitrides. The number density of large‐size carbontrides is remarkably reduced with increasing Ce content. A prediction model of optimum Ce content in molten steel is built, which has remarkable agreement with the experimental observations." @default.
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- W2896481036 date "2018-10-11" @default.
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- W2896481036 title "Effect of Cerium on the Behavior of Inclusions in H13 Steel" @default.
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- W2896481036 doi "https://doi.org/10.1002/srin.201800371" @default.
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