摘要
本文通过对3种不同晶粒度和Co含量的硬质合金PCB极小径钻头的钻孔对比实验,利用钻尖磨损仪、检孔机、孔粗测量仪检测3种不同材质的极小径钻头的磨损和崩口、孔位精度、孔壁粗糙度,着重考察了不同物理性能和参数特性的硬质合金对PCB极小径钻头钻孔性能的影响。结果表明:PCB极小径钻头的加工性能并不是随着硬质合金晶粒度的减小、Co含量的增加而逐渐提高。虽然随着硬质合金晶粒度的减小、Co含量的增加硬质合金的强度有所增加,但是也会导致极小径钻头的耐磨损性能降低,从而导致最终的极小径钻头钻孔性能受到一定影响。3种硬质合金PCB小钻头中,晶粒度为0.25μm、Co的质量分数为8%的硬质合金材质制作的PCB极小径钻头试样,综合性能优于其它晶粒度大小和Co的质量分数的硬质合金材质。
By contrast experiments on three types of ultra micro PCB drills made from cemented carbides with different grain sizes and Co contents, the wear and flare, hole registration accuracy, hole wall roughness were measured by drill-point friction wear tester, hole inspecting instrument and hole roughness measuring instrument. The influences of cemented carbides with different physical properties and parameter characteristics on the performance of ultra micro PCB drills were emphatically investigated in this paper. The results indicate that the performance of ultra micro PCB drills would not necessarily be improved with smaller grain sizes and more Co contents. Even though the strength of cemented carbide would be improved with smaller grain sizes and more Co contents, the wear-resistance property of the drills would be reduced, and the performance of the drills would also be influenced consequently. Cemented carbide with grain size of 0.25 μm and Co content of 8% shows better comprehensive PCB processing performance than the others in terms of ultra micro drill breakage, abrasive flare and hole registration accuracy.
出处
《硬质合金》
CAS
2015年第3期182-187,共6页
Cemented Carbides
基金
广东省战略性新兴产业核心技术攻关项目(2012A090100012
00367250185047081)
深圳市科技计划项目(CXZZ20140828155745799)专项资金资助
关键词
极小径钻头
硬质合金
硬度
磨损
强度
断刀
small-diameter drill bits
cemented carbide
hardness
abrasion
strength
breakage of drill bit
