MoS_(2)植物油基纳米流体对GH4169镍基合金钻削性能的影响研究

Study on Influence of MoS_(2)Plant Oil-based Nanofluid on Drilling Performance of GH4169 Nickel-based Alloy

为研究MoS_(2)植物油基纳米流体在镍基高温合金微量润滑钻削界面的摩擦学机理,以蓖麻油作为基础油,制备不同质量分数的纳米流体,搭建微量润滑钻削实验平台,以MoS_(2)植物油基纳米流体作为润滑液,开展了干钻、蓖麻油微量润滑和纳米流体微量润滑条件下镍基高温合金GH4169的钻削加工试验,对比分析干钻、纯蓖麻油微量润滑和不同质量分数的MoS_(2)纳米流体微量润滑对镍基合金钻削性能的影响。结果表明,MoS_(2)纳米流体微量润滑降低切削温度100℃以上,减少后刀面磨损量达75%,提高表面质量和刀具使用寿命,这主要归功于纳米颗粒的导热性能,减少了刀屑粘结,同时纳米颗粒的修补作用能填补切削刃上的微小缺口,进一步延长刀具使用寿命。

In order to investigate the tribological mechanism at the micro-lubricated drilling interface,plant oil-based MoS_(2)nanofluids were prepared using castor oil as the base oil with mass fractions of 1%,2%,and 3%.A micro-lubricated drilling experimental platform was established to conduct drilling experiments on nickel-based high-temperature alloy GH4169 under dry cutting,pure castor oil micro-lubrication,and different mass fraction MoS_(2)nanofluid micro-lubrication conditions.The influence of these lubrication methods on the drilling performance of nickel-based alloys was compared and analyzed.The results showed that MoS_(2)nanofluids can reduce average cutting temperatures by over 100℃,decrease tool wear by up to 75%,improve surface quality,and extend tool life by eight times.These improvements are mainly attributed to the thermal conductivity of nano-particles which reduces chip adhesion.Additionally,repair functions provided by nano-particles can fill in tiny gaps on cutting edges,further extending tool life.