Effects of Primarily Solidified Dendrite and Thermal Treatments on the M<sub>23</sub>C<sub>6</sub> Precipitation Behavior of High-Chromium White Iron
The precipitation behavior of M<sub>23</sub>C<sub>6</sub> carbide during thermal treatment of high-Cr white iron with various fractions of primarily solidified dendrite was studied and reviewed. M<sub>23</sub>C<sub>6</sub> precipitation in the primaril...
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| Autores principales: | , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/99748695df904e3f9b4a3367f17eeab8 |
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| Sumario: | The precipitation behavior of M<sub>23</sub>C<sub>6</sub> carbide during thermal treatment of high-Cr white iron with various fractions of primarily solidified dendrite was studied and reviewed. M<sub>23</sub>C<sub>6</sub> precipitation in the primarily solidified dendrite occurred preferentially during conventional heat treatment, whereas it occurred scarcely in the eutectic austenite. The reaction between M<sub>7</sub>C<sub>3</sub> and austenite caused the dissolution of M<sub>7</sub>C<sub>3</sub> into austenite, followed by precipitation of M<sub>23</sub>C<sub>6</sub> along the periphery of eutectic M<sub>7</sub>C<sub>3</sub>. Relatively low-temperature thermal treatment (modified heat treatment) led to precipitation of M<sub>23</sub>C<sub>6</sub> particles in the eutectic austenite, which is presumed to be caused by solubility difference depending on temperature. |
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