【摘要】 Inconel 718镍基高温合金薄壁件因其优异的耐高温与耐腐蚀性能，被广泛应用于航天与国防领域，但其低导热性、高硬度及结构薄弱导致加工中存在切削力大、变形显著、表面质量差等问题。采用电火花辅助铣削技术加工Incone 718薄壁件，并通过单因素实验评估其加工性能。结果表明：在主轴转速为2 250 r/min、电容为10~6 pF条件下，电火花辅助铣削相较常规铣削可使切削力峰值降低49.5%，变形量减小53.4%，表面粗糙度下降51.2%；电火花辅助铣削所产生的热能可以软化改性待切削区材料，降低材料的强度和硬度，从而减小切削力和工件变形，并提高表面质量，是一种精密高效的镍基高温合金薄壁加工方法。更多还原

【Abstract】 Inconel 718 nickel-based superalloy thin-walled components are widely used in aerospace and defense industries due to their excellent high-temperature resistance and corrosion resistance. However, their low thermal conductivity, high hardness, and thin-walled structure result in challenges during machining, such as high cutting forces, significant deformation, and poor surface quality. This study proposes the use of electrical discharge-assisted milling for machining Inconel 718 thin-walled parts and evaluates its performance through single-factor experiments. The results show that under a spindle speed of 2 250 r/min and a capacitance of 10~6 pF, EDAM can reduce the peak cutting force by 49. 5%, decrease deformation by 53. 4%, and lower surface roughness by 51. 2% is compared to conventional milling(CM). The thermal energy is generated by EDAM softens the modified material in the cutting zone, reducing its strength and hardness, thereby lowering cutting forces, minimizing workpiece deformation, and improving surface quality. EDAM demonstrates itself to be a precise and efficient method for machining nickel-based superalloy thin-walled components.更多还原