钎焊多层金刚石薄壁钻的性能研究

Study on performance of brazed multilayer thin-walled diamond drill bit

采用钎焊法制备多层金刚石薄壁钻,并对空白胎体及孕镶胎体的密度、抗弯强度等机械性能和钻头的使用性能在相同的工艺条件下与烧结钻头进行对比。结果表明:钎焊空白胎体和孕镶胎体的密度高,抗弯强度较大。钎焊钻头金刚石的出刃高度比烧结钻头提高了12.5%。钎焊钻头比烧结钻头的使用寿命提高了17.75%,但效率降低了4.63%。

The multilayer thin-walled diamond drill bit was fabricated by brazing in this paper.The density and bending strength of impregnated matrix and matrix without diamond grits,and the protrusion of diamond grits of the brazed multilayer thin-walled diamond drill bit were compared to that of the sintered drill bit at the same conditions.The results showed that the brazed matrix had the higher density and bending strength,the protrusion of brazed diamond grits was increased by 12.4%.The service life of brazed thin-walled drill bit was increased by 17.75%,but the efficiency was decreased by 4.63%.