Purpose

This study aims to comparatively analyze the cut parts obtained as a result of cutting the Ni-based Inconel 625 alloy, which is widely used in the aerospace industry, with the wire electro-discharge machining (WEDM) and abrasive water jet machining (AWJM) methods in terms of macro- and microanalyses.

Design/methodology/approach

In this study, calipers, Mitutoyo SJ-210, Nikon SMZ 745 T, scanning electron microscope and energy dispersive X-ray were used to determine kerf, surface roughness and macro- and microanalyses.

Findings

Considering the applications in the turbine industry, it has been determined that the WEDM method is suitable to meet the standards for the machinability of Inconel 625 alloy. In contrast, the AWJM method does not meet the standards. Namely, while the kerf angle was formed because the hole entrance diameters of the holes obtained with AWJM were larger than the hole exit diameters, the equalization of the hole entry and exit dimensions, thanks to the perpendicularity and tension sensitivity of the wire electrode used in the holes drilled with WEDM ensured that the kerf angle was not formed.

Originality/value

It is known that the surface roughness of the parts used in the turbine industry is accepted at Ra = 0.8 µm. In this study, the average roughness value obtained from the successful drilling of Inconel 625 alloy with the WEDM method was 0.799 µm, and the kerf angle was obtained as zero. In the cuts made with the AWJM method, thermal effects such as debris, microcracks and melted materials were not observed; an average surface roughness of 2.293 µm and a kerf of 0.976° were obtained.

中文翻译：

---

AWJM 和 WEDM 钻孔 Inconel 625 的比较

目的

本研究旨在比较分析航空航天工业中广泛使用的镍基 Inconel 625 合金采用电火花线切割加工 (WEDM) 和磨料水射流加工 (AWJM) 切割得到的切割零件。宏观和微观分析方法。

设计/方法论/途径

在本研究中，使用卡尺、Mitutoyo SJ-210、Nikon SMZ 745 T、扫描电子显微镜和能量色散 X 射线来确定切口、表面粗糙度以及宏观和微观分析。

发现

考虑到涡轮机行业的应用，已确定WEDM方法适合满足Inconel 625合金切削加工性的标准。相比之下，AWJM方法不符合标准。也就是说，虽然由于 AWJM 获得的孔的孔入口直径大于孔出口直径而形成切缝角度，但由于所使用的电极丝的垂直度和张力敏感性，孔入口和出口尺寸的均衡性。使用线切割机钻孔确保不会形成切缝角度。

原创性/价值

众所周知，涡轮机行业所用零件的表面粗糙度可接受 Ra = 0.8 µm。在本研究中，利用线切割加工方法成功钻削Inconel 625合金，得到的平均粗糙度值为0.799 µm，切缝角度为零。在使用 AWJM 方法进行的切割中，没有观察到碎片、微裂纹和熔化材料等热效应；平均表面粗糙度为 2.293 µm，切口为 0.976°。