热压高磷铁基胎体性能及其金刚石钻头研究

Study on the Performance of Hot Pressed High Phosphorus Iron Alloy Matrix and the Diamond Bit

摘要:

针对在硬而致密岩石中钻进时效低和钻头使用寿命短以及传统金刚石钻头胎体材料价格高等众多难题，采用混料回归试验设计方法，进行了替代碳化钨基金刚石钻头胎体材料的新型铁基胎体配方的试验研究；分析了热压钻头的金刚石出刃与岩石研磨性等岩性之间的内在联系，认为钻头的胎体成分及其性能是关键。因此，从热压金刚石钻头的胎体成分与性能研究入手，经过反复的试验研究与优化组合，研究出热压高磷铁基孕镶金刚石钻头的胎体材料，并试制出金刚石钻头。在室内对可钻性Ⅸ级岩石进行钻进的试验表明：钻进时效平均达到1.91 m，钻头平均工作寿命达到60.26 m。试验结果表明，高磷铁基胎体是一种性能良好的金刚石钻头胎体材料，且该类型胎体的热压金刚石钻头是一种成本明显降低、具有广谱性能的金刚石钻头。

Abstract:

Aiming at the low drilling efficiency and short service life of bit for drilling in hard and compact rocks and the high price of conventional matrix materials for diamond bit, the paper introduced mixing regression design method. Experimental study was made on the replacement of tungsten carbidebased matrix with a new ironbased matrix material; analysis was made on the relationship between the diamond exposure of hotpressed bit and rock abrasiveness properties, the matrix components and the performances were determined to be important. Based on the study of matrix components and performances of hot pressed diamond bit, high phosphorus iron based matrix material was developed and diamond bits with this kind of alloy as matrix were manufactured. The results of indoor drilling test on rock with drillability of grade Ⅸ showed that the average penetration rate reached 1.91m/h and average service life was 60.26m. Therefore, high phosphorus iron based matrix is a economical choice with good performance.