The strength and wear resistance of diamond drill bits for petroleum exploitation will be increased considerably when cast tungsten carbide is applied and adheres to the substrate firmly with cast tungsten carbide of 80 - 200mesh as the skelton and copper alloy as the soldering material in a process of non - pressure immersion 石油钻探行业用的金刚石钻头，用粒度为80 ? 200目的铸造碳化钨粉作骨架，采用无压浸渍工艺，以铜合金作钎焊料，将铸造碳化钨与基体牢固结合，强度、耐磨性大大提高。
