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Cryogenic and Dry Machining of Ti6Al4V Alloy for Evaluation of Microhardness, Thermal Loads, Microstructure, and Surface Quality
参考中译:低温和干法加工Ti6Al4V合金的显微硬度、热负荷、显微组织和表面质量


          

刊名：Journal of Materials Engineering and Performance
作者：Fallah Mohammad Meghdad（Shahid Rajaee Teacher Training University）
Jafarian Farshid（Mahallat Institute of Higher Education）
刊号：770B0012
ISSN：1059-9495
出版年：2023
年卷期：2023, vol.32, no.13
页码：5895-5905
总页数：11
分类号：TG; TB3
关键词：cryogenic machining；microstructure；surface quality；thermal loads；Ti6Al4V alloy
参考中译：深冷加工；组织；表面质量；热负荷；Ti6Al4V合金
语种：eng
文摘：Cryogenic cooling is an efficient technology to facilitate the machining process of difficult-to-cut materials. Performing this process with nontoxic biocompatible liquid nitrogen is an eco-friendly operation which has recently received much attention due to its promising advantages. In the present work, a comparative study has been performed on the machining process of Ti6Al4V alloy using dry and cryogenic cooling approaches. So, the effect of machining parameters (cutting speed, feed rate, and depth of cut) is investigated on the process temperature and the surface integrity features such as surface roughness, microhardness, and grain size. The results revealed that the cryogenic technology decreases the cutting region temperature by about 30% which means applying less thermal loads on the machining samples. Also, among the process parameters, the feed rate has the greatest effect and the cutting speed has the least effect on the machining temperature. Based on the results, the cryogenic cooling has a successful effect on improving surface quality. It was also discovered that the cryogenic machining increases microhardness and decreases grain size compared to dry machining.
参考中译：低温冷却是一种高效的加工难加工材料的技术。使用无毒、生物相容的液氮进行这一过程是一种生态友好的操作，由于其具有前景广阔的优点，近年来受到了广泛的关注。本文对Ti6Al4V合金的干冷和深冷加工工艺进行了对比研究。因此，研究了加工参数(加工速度、进给速度和加工深度)对加工温度和表面粗糙度、显微硬度和晶粒度等表面完整性特征的影响。结果表明，深冷技术使切削区温度降低了约30%，这意味着对加工样品施加的热负荷更少。在各工艺参数中，进给速度对加工温度的影响最大，切削速度对加工温度的影响最小。结果表明，低温冷却在改善表面质量方面取得了成功。研究还发现，与干式加工相比，低温加工提高了显微硬度，减小了晶粒度。



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