In this paper, the effect of cutting parameters during micromilling on surface finish and material removal rate is presented. Inconel 718 alloy and high-speed steel micro end mill are used as work material and cutting tool, respectively. High-speed steel end mill of 1 mm diameter is subjected to cryogenic treatment. Machining studies are performed on Inconel alloy using untreated and cryogenic treated cutters. The milling tests are conducted at three different values of feed rate, cutting speed and depth of cut. Also, tool wear, microstructure and microhardness of different treated and untreated end mill are investigated and discussed in detail. The results showed that cryogenic treatment significantly improved the tool wear. The surface finish produced on machining the work-piece is better with the cryogenic treated tools than when compared with the untreated tools. The material removal rate is better with the cryogenic treated tools than when compared with the untreated tools. Improvement in tool life was up to 53.16% for Inconel 718 material when machined with cryogenically treated micro end mill.

中文翻译：

---

低温处理对铬镍铁合金718微粉碎效果的实验研究

本文介绍了微铣削过程中切削参数对表面光洁度和材料去除率的影响。Inconel 718合金和高速钢微型立铣刀分别用作加工材料和切削刀具。直径为 1 mm 的高速钢立铣刀经过深冷处理。使用未经处理和低温处理的刀具对 Inconel 合金进行机加工研究。铣削测试是在三个不同的进给率、切削速度和切削深度值下进行的。此外，还详细研究和讨论了不同处理和未经处理的立铣刀的刀具磨损、显微组织和显微硬度。结果表明，低温处理显着改善了刀具磨损。与未经处理的工具相比，使用低温处理的工具加工工件时产生的表面光洁度要好。与未经处理的工具相比，经低温处理的工具的材料去除率更好。当使用低温处理的微型立铣刀加工时，Inconel 718 材料的刀具寿命提高了 53.16%。