CAJ | 학술논문

在硬质合金微型刀具加工高硅铝合金等难加工材料时,通过采用改进的热丝CVD装置开展了DLC涂层硬质合金微钻制备工艺优化,得到了最优沉积工艺,并配合高速加工高硅铝合金(Si15%)材料微小孔钻削性能对比试验,分析了刀具的磨损机理.结果表明:两步预处理方法适合复杂形状硬质合金衬底的预处理方法.钻削高硅铝合金时,DLC涂层具有低摩擦系数和高耐磨损特性,同等切削条件下,涂层微钻的切削寿命比未涂层硬质合金微钻提高了10倍.
재경질합금미형도구가공고규려합금등난가공재료시,통과채용개진적열사CVD장치개전료DLC도층경질합금미찬제비공예우화,득도료최우침적공예,병배합고속가공고규려합금(Si15%)재료미소공찬삭성능대비시험,분석료도구적마손궤리.결과표명:량보예처리방법괄합복잡형상경질합금츤저적예처리방법.찬삭고규려합금시,DLC도층구유저마찰계수화고내마손특성,동등절삭조건하,도층미찬적절삭수명비미도층경질합금미찬제고료10배.
In machining the particle reinforced aluminum based composite material with high Si content using the cobalt-cemented tungsten carbide micro cutting tools, diamond like carbon (DLC) films are deposited on cobalt-cemented tungsten carbide micro-drills with two-step pretreatment method. Characteristics of DLC coated tools are investigated in bias-enhanced HFCVD system with the optimized hot filament arrangement. The optimization deposition technology is obtained and the wear mechanism of cutting tools is analyzed. The drilling performance of DLC coated tools is verified by the experiments of cutting particle reinforced aluminum based composite material (Si 15% in volume) compared with uncoated ones. Experimental results show that the two-step pretreatment method is appropriate for complex shaped cemented carbide substrates and ensures the good adhesive strength between the diamond film and the substrate. The cutting performance of DLC coated tool is enhanced 10 times when machining the Si particle reinforced aluminum based metal matrix composite compared with that of uncoated ones under the same cutting conditions.