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首页> 外文期刊>Journal of Manufacturing Processes >Wear of TiAlN and DLC coated microtools in micromilling of Ti-6A1-4V alloy
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Wear of TiAlN and DLC coated microtools in micromilling of Ti-6A1-4V alloy

机译：Ti-6A1-4V合金微型TiAln和DLC涂层微池的磨损

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The trend toward the miniaturizing of commercial and engineering products is inevitable. Micromilling is the most versatile process to shape microcomponents subtractively. One of the main areas that benefit from micromilling is medical, with titanium and titanium alloy being its most frequently used materials. The popular Ti6Al-4V alloy has excellent combination of strength and toughness, combined with a great resistance to corrosion and oxidation. This particular alloy dominates other Ti alloys and is used in 50% of all titanium applications. Taking into consideration that this alloy is considered a difficult to cut material, this study investigates the machinability of Ti-6Al-4V in micromilling operations. The wear of micro tools (152.4 mu m diameter) coated with TiAlN and diamond-like carbon coating (DLC) are investigated and compared against uncoated tools. The tests are performed on a four-axis CNC milling system with a 60,000 min(-1) maximum spindle speed. The tools are tested under dry conditions and wet conditions using the minimum quantity of lubrication. It is used cutting speed of 9.6 m/min, feed rate of 0.1 mu m/tooth and axial depth of cut of 10 mu m. The test consisted of machining slots 4.2 mm long until the end of the tool life. The results show that edge radius rounding and flank wear are the main wear types. The wear is predominant on the secondary clearance face of the microtool when applying cutting fluid. The lowest tool wear is obtained with the DLC coated microtools under dry conditions, presenting a wear reduction of 640% and 267% when compared to TiAlN coated and the uncoated microtool, respectively.
机译：商业和工程产品小型化的趋势是不可避免的。微米是减去微型组件的最通用的过程。从微米受益的主要区域之一是医疗，钛和钛合金是其最常用的材料。流行的Ti6Al-4V合金具有优异的强度和韧性结合，结合耐腐蚀和氧化的巨大抵抗力。这种特定合金主要占据其他Ti合金，并用于50％的钛应用。考虑到这种合金被认为是难以切割的材料，本研究研究了TI-6AL-4V在微磨机操作中的可加工性。研究了涂有TiAln和金刚石碳涂层（DLC）的微工具（直径）的磨损并与未涂层的工具进行比较。测试在四轴CNC铣削系统上进行，具有60,000 min（-1）最大主轴速度。使用最小润滑量在干燥条件和湿条件下测试该工具。用5.6米/分钟的切割速度，进料速率为0.1μm/齿，轴向切割10μmm。该测试包括加工槽4.2毫米，直到刀具寿命的末端。结果表明，边缘半径圆形和侧面磨损是主要磨损类型。在施加切削液时，磨损在微池的二级间隙面上是占主导的。与干燥条件下的DLC涂覆的微池一起获得最低刀具磨损，与TiAln涂覆和未涂层的微池相比，涂布耐磨640％和267％。

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