近几年来,路产M2高速钢丝被工具厂广泛地运用在麻花钻头的生产可。北京量具刃具厂在φ13～φ3四辊热扭轧麻花钻头的生产中,发现国产M2钢丝的钻头往往在韧带部位产生裂纹,有时裂纹率很高,而这种情况在使用日立公司SKH9(相当M2牌号)钢丝中很少发现。这种状况对钻头的质量和经济效益带来很不利的影响。钢丝在高频感应圈中被瞬间加热至1000℃左右,进行四辊扭轧制成钻头。可轧性的好坏即引入所谓钢丝的“高频热塑性”问题。 In recent years, road production of M2 high-speed steel wire tools are widely used in the production of twist drill can be. Beijing Measuring Tool & Cutting Tool Factory In the production of φ13 ~ φ3 four-roller hot-twist twist drill bit, it is found that the drill bit of domestic M2 steel wire often has cracks in the ligament site and sometimes the crack rate is very high. In this case, using Hitachi SKH9 Grade) rarely found in the wire. This condition has a detrimental effect on the quality and economic benefits of the bit. Wire in the high-frequency induction coil was instantly heated to about 1000 ℃, four-roll twist drill made. Good or bad rolling that the so-called wire into the “high-frequency thermoplastic” issue.