A prealloyed Fe powder with high wear resistance and cold pressure molding ability was selected for diamond bit drilling into strong abrasive rock formations, such as reinforced concrete. The prealloyed Fe powder was layered along the radial direction of the diamond bit through cold pressing. A special shape was formed on the lip surface of the bit during drilling, which improved the drilling efficiency. In this paper, the matrix properties of a new impregnated diamond bit for reinforced concrete formation, composed of prealloyed Fe, prealloyed CrFe, Cu and 660-Cu, Ni and Co were studied, and the performance difference with the Fe-based formula is discussed. X-ray diffractometry (XRD) was used to determine the phases, and SEM was used to observe the micromorphology of the fracture. A regression model was selected to explore the influence of the matrix composition on the hardness and bending strength. The conclusions are as follows. The Fe-based matrix mixture test was carried out by the extreme vertex design method. The polynomial regression equations for the matrix composition, hardness, and bending strength were fitted. The calculated matrix values and experimental values matched closely. The higher the content of prealloyed CrFe was, the higher the hardness, but the brittle phase fractured the matrix, and the bending strength of the matrix decreased. The hardness and bending strength of the matrix increased with an increase in the Ni and Co contents. Cu enhanced the Ni and Fe, and the increase in Cu and 660-Cu content increased the bending strength of the matrix. The performance data for the Fe-based formula showed that adding an appropriate amount of prealloyed CrFe powder, Cu and 660-Cu, Ni, and Co to the Fe-based matrix effectively improved the mechanical properties of the sintered body. Two formulas were determined through the experiments and sintered into drill bits for on-site drilling. The results show that the use of a prealloyed Fe-based powder formula system effectively improved the drilling efficiency and drilling life of the bit, and the comprehensive performance of the bit was significantly improved.

选择具有高耐磨性和冷压成型能力的预合金铁粉，用于在坚固的磨料岩层（例如，钢筋混凝土）中进行金刚石钻头钻孔。通过冷压使预合金化的Fe粉沿着金刚石钻头的径向分层。在钻孔过程中，在钻头的唇缘表面上形成了特殊的形状，从而提高了钻孔效率。本文研究了由预合金铁，预合金铬组成的新型浸渍金刚石钻头用于钢筋混凝土地层的性能研究了Fe，Cu和660-Cu，Ni和Co，并讨论了与铁基配方的性能差异。X射线衍射仪（XRD）用于确定相，而SEM用于观察裂缝的微观形貌。选择回归模型以探索基质组成对硬度和弯曲强度的影响。结论如下。铁基基体混合物测试是通过极限顶点设计方法进行的。拟合了基体组成，硬度和抗弯强度的多项式回归方程。计算出的矩阵值和实验值紧密匹配。预合金铬含量较高Fe为硬度越高，但脆性相使基体断裂，并且基体的弯曲强度降低。随着Ni和Co含量的增加，基体的硬度和弯曲强度也随之增加。铜增强了镍和铁的含量，而铜含量和660-Cu含量的增加也提高了基体的弯曲强度。铁基配方的性能数据表明，添加适量的预合金铬将Fe粉，Cu和660-Cu，Ni和Co添加到Fe基基质中可有效地改善烧结体的机械性能。通过实验确定了两个公式，并烧结成钻头用于现场钻孔。结果表明，采用预合金铁基粉末配方体系有效提高了钻头的钻进效率和钻进寿命，并显着提高了钻头的综合性能。