However, excessive P addition results in a larger degreeofsuperheat of the melt, hence aggravating the oxidation.
但当P过量时， 则会因熔体过热倾向明显而加剧氧化；
2
Some problems as incorrect adjustment on the degreeofsuperheat, general failure of the thermometer bulb, matching of the capacity and freezing of the TEV are presented.
The effects of different casting speeds, degreeofsuperheat and secondary cooling to the central and Angle part temperatures and the final solidification point have been studied.