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制造切削工具最理想的钢材是高速钢,它不仅可以增加刀具本身的使用寿命,提高切削效率,而且在热处理过程中也不易发生疵病。但高速钢售价较贵,在原材料不足的情况下,应该选用其它的钢材代替。一般常用的有碳工具钢和铬硅工具钢。铰刀是很精密的工具,淬火后不允许产生过多的变形。而碳工具钢的淬硬性较差,要得到高的硬度,必须投入水中冷却。由于水的冷却速度很快,所以它的弯曲变形也非常厉害,有时甚至还要产生裂纹。因此,只有外径较小的(在15公厘以
The most ideal steel for cutting tools is high-speed steel, which not only increases the life of the tool itself, increases the cutting efficiency, but also is less susceptible to flaws during heat treatment. However, the price of high-speed steel expensive, lack of raw materials in the case, you should choose other steel instead. Commonly used carbon tool steel and chromium silicon tool steel. Reamer is a very sophisticated tool, quenching does not allow too much deformation. The hardenability of carbon tool steel is poor, to get high hardness, must be put into water cooling. Because of the rapid cooling of water, so its bending deformation is also very powerful, and sometimes even have cracks. Therefore, only the outer diameter is smaller (at 15 mm