干式钻进金刚石钻头的制备及钻进性能研究

Preparation and drilling properties of dry drilling diamond bit

对干式钻进金刚石钻头的优点和国内干式钻进市场的现状,以及干式钻进钻头胎体设计的原则等问题进行了概述,实验中引入超细钨铜合金粉末来解决钻头烧结及钻进过程中存在的问题。实验结果显示:采用质量分数为45%的钨铜合金粉末,配合Cu、Co及Ni等金属粉组成胎体,通过制粒、预压成型、脱蜡、烧结、焊接等工艺制备了实验钻头,当烧结温度为850℃,压力25 MPa,保温时间180s时,钻头刀头的硬度超过HRB110,金刚石出刃效果好。与韩国某公司钻头进行花岗岩钻进对比显示:本实验钻头钻进效率提高7%,寿命和韩国某公司钻头相当,体现出了良好的干式钻进性能。

The advantages of dry drilling bit are introduced,as well as the status of domestic dry drilling market,and the principle of the bit matrix design.Ultra-fine tungsten copper alloy powder helps to solve the problems of sintering and drilling in experiment.Tungsten copper alloy powder（mass fraction 45%）,with metal powder（Cu,Co,Ni,etc.）,is used to make experimental bit matrix through the process of granulation,pre-compression,dewaxing,sintering,and welding.Results show that when sintered at 850℃,and 25 MPa for 180 s,the hardness of bit segment is more than HRB110,and the effect of diamond grit protrusion is good.Compared with the drilling bit imported from Korean,the granite drilling efficiency of domestic bit is increased by 7%,while the life is equal with Korean drilling bit,which reflects the good performance of dry drilling.