Szablewski Piotr, Legutko Stanisław, Mróz Adrian, Garbiec Dariusz, Czajka Rafał, Smak Krzysztof, Krawczyk Bartłomiej
Pratt & Whitney Kalisz, 4a Elektryczna Street, 62-800 Kalisz, Poland.
Institute of Gears Research Excellence Center, The President Stanislaw Wojciechowski Calisia University, 4 Nowy Świat Street, 62-800 Kalisz, Poland.
Materials (Basel). 2023 Jan 19;16(3):949. doi: 10.3390/ma16030949.
This paper presents a comparison of surface morphology obtained after machining Inconel 718 by the conventional insert, by Wiper insert and by using the cutting insert made by Spark Plasma Sintering (SPS). The shape of the special insert was obtained by employing Wire Electrical Discharge Machining (WEDM). The paper focuses on the description of surface topography after turning in dry and wet conditions. The performed investigation included longitudinal turning tests of Inconel 718 performed in a range of variable feeds. Surface topography measurements have been performed with the application of Nanoscan 855. The performed analysis includes a parametric evaluation of the obtained surfaces. With the Wiper insert, the surface roughness parameter was obtained below 0.6 µm in the whole range of used feed rates. The surface roughness parameter measured on the surface after machining by special insert depends on the cutting conditions (wet and dry machining). After, the dry machining parameter , similar to the Wiper insert, was below 0.6 µm in the whole range of used feed rates. Unfortunately, cutting Inconel 718 using special insert with feed rate = 0.25 mm/rev and cooling generated a surface with parameter over 2 times higher than for the same feed rate without cooling, while this parameter, after turning by conventional insert, increases over 4 times using feed rate = 0.25 mm/rev compared to feed rate = 0.05 mm/rev during machining with cooling. This ratio is lower for conventional insert in dry machining because of sticking, which arises at the smallest feed rate according to previous research.
本文介绍了采用传统刀片、修光刀片以及使用放电等离子烧结（SPS）制成的切削刀片加工因科镍合金718后所获得的表面形貌对比。特殊刀片的形状通过电火花线切割加工（WEDM）获得。本文重点描述了在干式和湿式条件下车削后的表面形貌。所进行的研究包括在一系列可变进给量下对因科镍合金718进行纵向车削试验。已使用Nanoscan 855进行了表面形貌测量。所进行的分析包括对所得表面的参数评估。使用修光刀片时，在整个使用的进给速度范围内，表面粗糙度参数均低于0.6 µm。用特殊刀片加工后表面测得的表面粗糙度参数取决于切削条件（干式和湿式加工）。在干式加工参数方面，与修光刀片类似，在整个使用的进给速度范围内均低于0.6 µm。遗憾的是，使用进给速度f = 0.25 mm/rev的特殊刀片切削因科镍合金718并冷却时，产生的表面的Ra参数比相同进给速度下不冷却时高出2倍以上，而在冷却加工过程中，与进给速度f = 0.05 mm/rev相比，使用进给速度f = 0.25 mm/rev时，传统刀片车削后的该参数增加了4倍以上。根据先前的研究，由于在最小进给速度下会出现粘结现象，传统刀片在干式加工中的该比率较低。
