超细Fe粉和Cu粉在金刚石薄壁工程钻中的应用研究

在Fe-Cu和Fe-Cu-Ni基胎体中探究超细Fe粉和Cu粉对胎体烧结硬度、应力-应变曲线、烧结界面形貌的影响机理，进而总结出使用超细金属粉对工程薄壁钻头使用性能的影响。实验表明:将超细金属粉应用于Fe-Cu、Fe-Cu-Ni基胎体，可使2种烧结体的硬度分别提高6.25%和12.20%；将2种配方钻头的使用寿命分别提高21.6%和82.5%，钻切速度分别下降4.5%和16.2%；2种钻头刀头顶刃的磨损表面较细腻、光滑，与钻切材料的摩擦系数低。但采用超细粉制备的Fe-Cu-Ni基胎体耐磨性过强，金刚石的出刃高度明显降低。 

Study on ultra-fine iron and copper powder used in diamond core drill bits

In the Fe-Cu and Fe-Cu-Ni matrices, the influence mechanism of adding ultrafine powders (Fe and Cu) on their sintering hardness, stress-strain curve and sintering interface morphology was investigated, and its effect on the performance of diamond core drill bits was studied. Results show that the hardness of the two sintered body can be increased by 6.25% and 12.20% respectively when ultrafine metal powders are applied to Fe-Cu, Fe-Cu-Ni matrix. The service life of the two bits is increased by 21.6% and 82.5% respectively, and the cutting speed of the two bits is slowed by 4.5% and 16.2% respectively. The wear surfaces on the top edges of the bits are fine and smooth, and the friction coefficients between bits and drilling material are. However, the Fe-Cu-Ni matrix prepared by adding ultrafine metal powders has strong wear resistance, which results in significant height decrease of exposed diamonds at the cutting edges.