Application of liquid nitrogen and spray mode of biodegradable vegetable cutting fluid with compressed air in order to reduce cutting fluid consumption in turning Inconel 740
Application of liquid nitrogen and spray mode of biodegradable vegetable cutting fluid with compressed air in order to reduce cutting fluid consumption in turning Inconel 740
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DOI：
10.1016/j.jclepro.2015.07.045
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发表时间：
2015-12
影响因子：
11.1
通讯作者：
Ahmadreza Hosseini Tazehkandi;M. Shabgard;Farid Pilehvarian
中科院分区：
文献类型：
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作者：
Ahmadreza Hosseini Tazehkandi;M. Shabgard;Farid Pilehvarian
Inconel 740与其他镍基高温合金一样，由于其具有高耐蚀性和耐热性等上级特性，在高温下仍能保持其机械和化学性能，因此在航空航天、造船和涡轮机制造等行业有着广泛的应用。然而，非常低的传热系数和高韧性，沿着加工硬化，可以把这些合金的类别的难加工材料，它可能会导致严重的问题，在增加加工输入参数。因此，使用合适的切削液是这些合金加工不可或缺的一部分。使用切削液会导致各种问题，包括环境污染、对人体健康的不利影响和高加工成本。因此，寻求降低切削液消耗量和提高切削速度、进给量等输入参数的方法，具有重要的工业意义。本研究在液氮生物降解植物切削液与压缩空气结合的淹没模式和喷雾模式两种切削液应用模式下，研究了加工参数对切削力、表面粗糙度和刀尖温度的影响，以大幅降低切削液消耗。结果表明，采用液氮与喷射方式的切削液和压缩空气相结合，不仅可以降低切削力和刀尖温度，而且在所有试验中，切削液消耗量均低于溢流方式，并有可能获得较高的切削速度和进给量。值得一提的是，通过使用这种方法，可以通过热成像仪测量温度，以控制加工过程。
Inconel 740, similar to other nickel-based superalloys, owing to its superior characteristics such as having high corrosion and heat resistance, can retain its mechanical and chemical properties in elevated temperature, therefore, it has extensive applications in aerospace, shipbuilding and turbine manufacturing industries. Nevertheless, very low heat transfer coefficient and high toughness, along with work hardening, can put these alloys in the category of hard-machining materials, and it may induce severe problems in increasing machining input parameters. Thereby, utilizing an appropriate cutting fluid is an indispensable part of the machining in these alloys. Making use of the cutting fluid can cause various problems, include environmental pollution, adverse effects on human health and high machining cost. Therefore, finding a way to reduce the cutting fluid consumption and a method to increase input parameters, such as cutting speed and feed rate, is of great importance in industry. In the present study, the influences of machining parameters on cutting forces, surface roughness and tool tip temperature have been investigated in two modes of cutting fluid application, flood mode and spray mode of liquid nitrogen with biodegradable vegetable cutting fluid in combination with compressed air, in order to make a dramatic reduction in the cutting fluid consumption. The results show that using liquid nitrogen in combination with spray mode of the cutting fluid and compressed air, not only can reduce the cutting forces and tool tip temperature, but also in all of the experiments, cutting fluid consumption is lower than flood mode, and it is possible to attain high cutting speeds and feed rates. It is worth mentioning that by making use of this approach it is feasible to measure temperatures via a thermal imager in order to control the machining process.