In cutting tool heat treatment craft, two most important process parameters must mention here, namely heating temperature and heating time. Based on accordance to formula that P=t(37tgts). In the formula, P equals quenching heating parameter; T means heating temperature; TS equals heating time.
Generally, the higher the austenitizing temperature is, the better the carbide circular slitter round blade’s wear resistance and thermal hardness are. However, considering grain refinement and toughness improvement, quenching temperature should not be too high. In line with use characteristic of workpiece, lower quenching heat temperature and longer holding time should be adopted, yet this will waste much energy. Through repeated practice, rapid heating technology is explored. It means using higher temperature and shorter time to make blade hard and tough. From the formula, it can be seen that effect of increasing temperature is better than prolonging time. As long as the parameters of the two functions are same, effect of heat treatment should be same too. In the production,people realized that the concept of “degree” must be mastered in the process of rapid heating, otherwise it will be self defeating.