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Effect of glass colour agent on the heat transfer property of peritectic steel mould flux

Abstract This work was our previous research on peritectic steel mould flux, which found that when the colour of peritectic steel mould flux is deepened, the heat-shield property enhanced. Here, adding glass colour agent into peritectic steel mould flux was introduced for the first time. Compared with our former work, Co2O3, NiO, Fe2O3, the black glass colour agent performed better on decreasing radiation heat transfer property than the single addition and the optimal contents of each component are 2 wt-% Co2O3, 2 wt-% NiO, 3 wt-% Fe2O3. In this paper, automatic colorimeter utilised to characterise the colour of samples and the heat flux densities result can clearly reflect the heat transfer property. The structures, composition and crystal properties of the samples were characterised by scanning electron microscope, energy-dispersive X-ray spectroscope, electron probe microanalyser and X-ray diffraction. The enhancement of heat-shield property is mainly attributed to the addition of black glass colour agent.