螺絲的大批生产大都采用滚制的方法。所用的滾刀必須具备一定的硬度和高的韌性;因此,正确选用滾刀材料和进行适当的热处理,是一項非常重要的工作。我厂生产上采用的滾刀(如图1)大都是自制的。开始时,曾試用了好几种材料,如高速鋼、高碳鋼等,效果都不好;采用和9鋼,也沒有得到理想的結果。 Most of the large-scale production of screws using the rolling method. The hob used must have a certain degree of hardness and high toughness; therefore, the proper choice of hob material and proper heat treatment is a very important task. I used in the production plant hob (Figure 1) are mostly homemade. In the beginning, several materials such as high-speed steel and high-carbon steel had been tested and the results were not good. No satisfactory results were obtained with 9 steel.