中文摘要：

采用热压烧结法,以WC基混合粉末和MBD8人造金刚石为原材料,通过改变添加至胎体中的胎体弱化颗粒材质,制备钻进打滑地层用WC基孕镶金刚石钻头,并进行钻进试验。采用室内钻进及SEM扫描电镜分析等手段研究不同胎体弱化颗粒材质对钻头胎体结构、力学性能和摩擦磨损行为的影响。结果表明：粒径小于425μm的Si C颗粒由于其脆性特性,适当浓度的Si C颗粒能够减少单位面积上金刚石颗粒数,利于唇面比压的提高,进而提高钻头碎岩效率;棕刚玉颗粒的脆性破损断裂的能力较差,无法有效剥落以增加胎体的粗糙度,并促进金刚石的新陈代谢;硬质合金钢丸颗粒由于本身性质导致其无法有效促进金刚石出刃,不宜作为胎体耐磨损性弱化颗粒材质。

英文摘要：

The matrix weaken diamond bit was prepared by hot pressing with choosing different kinds of matrix weaken particle materials. The matrix weaken particle materials influence on matrix structure, mechanical properties, friction and wear characteristics was studied by interior drilling test and SEM. The results show that SiC particle with size less than 425 μm can enhance the drilling efficiency and bit pressure by decreasing the diamond quantity of unit area. Brown Corundum can not promote diamond metabolism rapidly because the ability of brittle fracture is weaker, the cemented carbide shot can not choose as matrix weaken particle material because it can not promote diamond metabolism.