control at metal temperature

There is a direct relationship between temperature and the amount of gas a copper-base alloy will dissolve while in the molten state. The higher the temperature, the more gas will be absorbed. Thus it is essential( that metal b~ taken from the furnace as soon as it has reached the minimum temperature necessary for pouring molds.A pyrometer should be used to determine the melting temperature of copper-base alloys. Generally, the melt should only be taken to the temperature which will per­mit removal from the furnace., skimming, deoxidizing, other necessary handling, and pouring at the required pouring temperature. This means controlled superheat­ing, which is most important in producing quality cop­per alloys for quality castings