The results show that the punch possessed by high strength hardness, toughness and rational or best length can be substituted for high speed steel to make holes at high quality and speed, with as many as 8000 holes per punch.

• 结果表明：具有高强度、高硬度、足够韧性和合理甚至最佳长度的冲头可以代替高速钢麻花钻头高质、高效成孔，其冲孔数量可达8000个/根。