纳米WC弥散强化孕镶金刚石钻头

Dispersion strengthened impregnated drill bits by WC nanoparticles

为提高孕镶金刚石钻头的钻进效率和使用寿命,将纳米WC引入到传统胎体配方。利用纳米WC的弥散强化作用,优化胎体配方及制备工艺,提高钻头工作层的物理力学性能,从而研制出强化型孕镶金刚石钻头。将其与传统钻头进行室内钻进对比试验。结果表明:将质量分数为2.5%的纳米WC添加到孕镶金刚石钻头的传统胎体配方中研制出的强化型钻头,其机械钻速提高了24.93%,使用寿命提高了28.91%,钻进过程更加平稳。

In order to improve the drilling eCficiency and serving life of impregnated diamond bits,WC nanoparticles were introduced into the matrix of traditional bit matrix.The matrix formula and preparation process were optimized to utilize the dispensation strengthening eefect of WC nanoparticles,improving physical and mechanical performance of working layers.Indoor drilling experiments were carried out to compare the the enhanced and traditional bits.Results show that when adding 2.5wt%nano-WC into traditional matrix of impregnated bits,an enhanced bit is developed,with 24.93%faster drilling speed,28.91%longer service life and steadier process.