采用国产铰链式六面顶压机,通过高温高压(HPHT)合成工艺及后续加工获得石油钻探用非平面聚晶金刚石复合片,包括三刃齿、四刃齿及五刃齿的,同时考察刃齿与垂直方向夹角对三刃齿、四刃齿及五刃齿复合片性能的影响.实验室检测结果表明:刃齿与垂直方向夹角呈90°的三刃齿、四刃齿及五刃齿与屋脊齿在耐磨性、磨削载荷力及抗疲劳冲击性方面基本保持不变;相较平面齿,屋脊齿90°耐磨性、抗疲劳冲击性分别提高约58.6%、51.8%,磨削载荷力降低41.9%.当三刃齿、四刃齿及五刃齿的刃齿与垂直方向夹角呈99°时,相较于夹角呈90°时,在耐磨性及磨削载荷力保持一致的条件下,屋脊齿99°抗疲劳冲击性平均提高约30%;而相较于平面齿,抗疲劳冲击性平均提高约95.7%.%Utilizing domestic hinge-type cubic press , the un-planar surfaces polycrystalline diamond compacts used in oil drilling were synthesized under high temperature , high pressure and subsequent processing conditions , including 3-ridge , 4-ridge and 5-ridge cutters . Meanwhile , the influences of cutting edge and vertical direction angle on the performances of 3-ridge , 4-ridge and 5-ridge cutters were investigated . The laboratory testing results show that the wear resistance , loading force and fatigue resistance of the 3-ridge , 4-ridge and 5-ridge cutters ( the angle between the cutting edge and vertical direction is 90°) are the same as that of the ridge-cutter;compared with flat cutters , their wear resistance and fatigue resistance are increased by about 58 .6% and 51 .8% respectively , and the loading force is reduced by 41 .9% . When the 3-ridge , 4-ridge and 5-ridge cutters′angles between the cutting edge and vertical direction are 99° , the average values of their fatigue resistances are about 30% higher than that of 90° under the same conditions of wear resistance and grinding loading force , and about 95 .7% higher than that of the flat cutters .
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