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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 313 - 319 (7page)
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In this work, the morphology and structures of the eutectic and secondary carbides in a new high chromiumFe-12Cr-2.5Mo-1.5W-3V-1.25C designed for cold-rolling work roll were systematically studied. The precipitatedcarbides inside the grains and along the grain boundaries were investigated with optical microscope,scanning electron microscopy with energy dispersive spectroscopy, transmission electron microscopy andX-Ray diffraction. Selected area diffraction patterns have been successfully used to identify the crystal formationand lattice constants of the carbides with different alloying elements. The results show that the eutectic carbidesprecipitated contain MC and M2C distributed along the grain boundaries with dendrite feature. The compositionand crystal structure analysis shows that the eutectic MC carbides contain VC and WC with a cubic and hexagonalcrystal lattice structures respectively, while the eutectic M2C carbides predominantly contain V2C and Mo2Cwith orthorhombic and hexagonal crystal lattices respectively. The secondary carbides contain MC, M2C,M7C3 formed along the grain boundaries and their sizes are much larger than the eutectic carbides ones. The secondary M23C6 is much small (0.3-0.5μm) and is distributed dispersively inside the grain. Similar tothe eutectic carbides, the secondary carbides also contain VC, WC, V2C, and Mo2C. M7C3 is hexagonal(Fe,Cr)7C3, while M23C6 is indexed to be in a cubic crystal form.
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