Metall. Res. Technol.
Volume 114, Number 3, 2017
|Number of page(s)||12|
|Published online||13 June 2017|
Phase diagram calculation and analyze on cast high vanadium wear-resistant alloy
School of Materials Science and Engineering, Beijing University of Technology,
100124, P.R. China
2 Powder Metallurgy Research Institute, Central South University, Changsha 410012, Hunan Province, P.R. China
⁎ e-mail: email@example.com
Received in final form: 8 November 2016
Accepted: 9 January 2017
The equilibrium-solidified phase diagrams of high vanadium wear-resistant alloy with different vanadium concentration have been calculated. The vertical section of Fe–C, Fe–V pseudo-binary phase diagrams and the transformation diagrams of phases have been drawn by the Thermo-Calc software. The effects of vanadium on the phase diagram and solidification microstructure have been investigated by optical microscopy, scanning electron microscopy, EDS, XRD and differential scanning calorimetry (DSC). The results show that the parameter of eutectic transformation and the phase regions are changed significantly with the increase of vanadium concentration. The solidification structure includes α-Fe, MC-type, M7C3-type and M3C-type carbides. Vanadium element is mainly distributed over MC-type carbides. The MC-type carbides morphology changes from strip and short rod to spherical and lumpy with the increase of vanadium concentration. The DSC, solidification structure and XRD results are agreed with the ones from calculation.
Key words: high vanadium wear-resistant alloy / phase diagram calculation / solidification microstructure / vanadium content
© EDP Sciences, 2017
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