Super-hard high-temperature resistant M-42 that is best cobalt steel with high hardness and hot strength finds the application in manufacturing of twist drills, milling cutters, taps, reamers, broaches etc. The wire cut EDM process was seen as a decent option over conventional machining forms. In this research work, the effect of normal brass wire (N_bw) and cryo-treated brass wire (CT_bw) on M-42 steel was investigated experimentally and analytically. A shallow cryogenic treatment (− 110 °C) is given to normal brass wire (N_bw) which was set at (4-8-4 cycle). Further it was also compared the regression analysis of process parameters of wire cut EDM with well-known design of experiment approach called response surface methodology. The parameters pulse on time (T_on), pulse off time (T_off), spark gap voltage (SV) and wire feed (W_F) have been selected as input parameters. The output attributes have been measured in terms of cutting speed (CS) and surface roughness (SR). The use of normal brass wire (N_bw), the cutting speed (CS) and surface roughness (SR) was increased by 98% and 41%. After using shallow cryogenic treatment, the electrical conductivity of the cryo-treated brass wire (CT_bw) was improved the performance of wire cut EDM. As a result, both the cutting speed (CS) and surface roughness (SR) were improved by 102% and 35%. From surface morphology, the machined surface was observed with uniform craters, no micro-cracks and less debris after cryogenic treatment.

超硬耐高温M-42是具有高硬度和高强度的最佳钴钢，可用于制造麻花钻，铣刀，丝锥，铰刀，拉刀等。线切割EDM工艺被认为是不错的选择可以选择传统的加工形式。在这项研究工作中，通过实验和分析方法研究了普通黄铜线（N _bw）和冷冻处理黄铜线（CT _bw）对M-42钢的影响。对普通黄铜线（N _bw）进行浅低温处理（-110°C））设置为（4-8-4周期）。此外，还将线切割电火花加工的工艺参数的回归分析与称为响应面方法的实验方法的著名设计进行了比较。已选择参数脉冲接通时间（T _on），脉冲断开时间（T _off），火花隙电压（SV）和送丝（W _F）作为输入参数。输出属性已根据切削速度（CS）和表面粗糙度（SR）进行了测量。使用普通黄铜线（N _bw），切割速度（CS）和表面粗糙度（SR）分别提高了98％和41％。使用浅低温处理后，经过低温处理的黄铜线的导电率（CT _bw）改进了线切割电火花加工的性能。结果，切削速度（CS）和表面粗糙度（SR）分别提高了102％和35％。从表面形态来看，经过深冷处理后，观察到加工后的表面具有均匀的弹坑，无微裂纹且碎屑更少。