一、前言我厂生产的φ3～6长刃直柄麻花钻材料为W_6Mo_5Cr_4V_2高速钢。这种长刃钻的刃长几乎是普通钻头的一倍。表1为φ4.2长刃钻头与普通钻头对比情况。长刃钻头由于长径比大,热处理过程中极易产生变形,本文提出了一些减少变形的措施,并取得了较好的效果。 I. Preface The φ3 ~ 6 long straight edge twist drill material produced by our factory is W_6Mo_5Cr_4V_2 high speed steel. The blade length of this long edge drill is almost double the average drill bit. Table 1 is φ4.2 long blade and drill bit compared to the situation. As a result of the large aspect ratio, the long-edge bit can easily deform during the heat treatment. In this paper, some measures to reduce the deformation and some good results have been obtained.