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无压浸渍法制造金刚石钻头且适宜制造较大口径和异形金刚石钻头。这种方法的胎体骨架材料含有大量铸造碳化钨，因此所制造出来的钻头胎体硬质点多，切削岩石力强，尤其是具有耐磨性高和抗冲蚀力强的优点。例如我队用无压浸渍法制造的尖齿形钻头，不仅能用于完整硬岩，更适用于坚硬致密的“打滑”地层，其时效可比平底形钻头提高1～4倍。又如所制造的圆弧形钻头，用于坚硬、破碎地层，时效和
Pressureless impregnation method for the manufacture of diamond bits and suitable for the manufacture of larger caliber and shaped diamond drill bits. The carcass skeleton material of this method contains a large amount of cast tungsten carbide, and therefore the drill bit matrix produced with more hard spots and strong cutting rock strength has the advantages of high abrasion resistance and erosion resistance. For example, the sharp-tooth drill bit made by our team with pressureless impregnation method can be used not only for complete hard rock but also for hard and dense “slippery” formations, which can be aged by 1 to 4 times more than flat bottom drills. Another example is the manufacture of arc-shaped drill bit, for hard, broken strata, aging and