The unconventional technology of wire electrical discharge machining is a key engineering technology, designed primarily for machining of conventionally difficult machine materials. One of them is nickel alloys, which are majorly used in the aerospace and energy industries. The subject of research in this study was specifically the B1914 nickel-based superalloy, which was subjected to many analyses leading to an overall optimization of its machining using wire electrical discharge machining. In order to determine the effect of machine parameters setup (pulse off time, gap voltage, discharge current, pulse on time and wire feed) on cutting speed, topography, morphology, surface and subsurface layer quality, an extensive Box–Behnken design experiment consisting of 46 rounds was carried out. The analyses of the condition of the surface and subsurface layers were performed, including their chemical composition and changes caused by wire electrical discharge machining. It was found out that the factors like pulse off time, discharge current and pulse on time have the greatest effect on the cutting speed, although from the point of view of surface topography the parameter pulse off time is not significant. The remaining two parameters cause the cutting speed to act against the surface topography i.e. with the increasing cutting speed, the surface topography gets worse and vice versa.

电火花线切割非常规技术是一项关键的工程技术，主要用于常规难加工材料的加工。其中之一是镍合金，主要用于航空航天和能源行业。本研究的研究对象特别是 B1914 镍基高温合金，该合金经过多次分析，最终使用线放电加工对其加工进行了整体优化。为了确定机器参数设置（脉冲关闭时间、间隙电压、放电电流、脉冲开启时间和送丝）对切割速度、形貌、形态、表面和次表面层质量的影响，一个广泛的 Box-Behnken 设计实验包括共进行了 46 轮。对表面和次表面层的状况进行了分析，包括它们的化学成分和由线放电加工引起的变化。结果表明，脉冲关闭时间、放电电流和脉冲开启时间等因素对切割速度的影响最大，尽管从表面形貌来看，脉冲关闭时间参数并不显着。剩下的两个参数导致切削速度与表面形貌相反，即随着切削速度的增加，表面形貌变得更糟，反之亦然。尽管从表面形貌的角度来看，参数脉冲关闭时间并不重要。剩下的两个参数导致切削速度与表面形貌相反，即随着切削速度的增加，表面形貌变得更糟，反之亦然。尽管从表面形貌的角度来看，参数脉冲关闭时间并不重要。剩下的两个参数导致切削速度与表面形貌相反，即随着切削速度的增加，表面形貌变得更糟，反之亦然。