The Heat Treatment of Fasteners - Tips for Operation

摘要

In part 6 of this latest installment of the Heat Treating Fastener series, the authors provide advice on the operation of fastener heat treating furnaces and quenching systems. Most heat treat shops (Figure 1) will have at least two different styles of furnaces: high-temperature furnaces that are used for normalizing and austenitizing; and low-temperature furnaces for annealing, stress relief and tempering. In addition, they have one or more quenching systems. As previously discussed in this series of articles, the important process variables for these heat treatments are temperature, time, atmosphere and cooling rates. The importance of these process variables will be discussed in this article.