我厂采用的一种硬质合金席乐夫钻头,是在40X 钢的钻头体上,焊一个硬质合金 BK8的刀片,刃部磨成席乐夫钻头几何形状。这种钻头的寿命,比一般钻头要高1倍多,切削速度比一般钻头又高得多,所以生产效率很高。硬质合金席乐夫钻头的结构如附图。在40X 钢的钻头体上,铣出一个刀片槽,钻头体淬硬到 Rc40～45。将硬质合金BK8的刀片,用银焊焊在钻头体的槽中。将硬质合金刀片及 I plant a carbide Schiller bite, is 40X steel drill body, welding a carbide BK8 blade, the blade edge grinding Schlaf bit geometry. The life of this drill bit than the average drill more than 1 times, the cutting speed is much higher than the average drill, so the production efficiency is high. Carrot Schlaf bit structure as shown in the accompanying drawings. In the 40X steel drill body, milling a blade groove, bit body hardened to Rc40 ~ 45. The carbide BK8 blade, with silver welding in the bit body groove. Carbide inserts and