In cutting tool heat treatment craft, the two most important process parameters must mention here, namely heating temperature and heating time. Based on accordance with the 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, the quenching temperature should not be too high. In line with the use characteristic of the 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 temperatures and shorter time to make the blade hard and tough. From the formula, it can be seen that the effect of increasing temperature is better than prolonging time. As long as the parameters of the two functions are the same, the effect of heat treatment should be the 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.