通過銑削試驗分別研究了主軸轉速(300,500,650,800,1 200 r·min^-1)、銑削進給量(0.030,0.045,0.060,0.075,0.090 mm·r^-1)和單道次銑削深度(0.20,0.35,0.50,0.65,0.80 mm)對FGH4113A鎳基高溫合金加工表面完整性的影響。結果表明:隨著銑削進給量或單道次銑削深度的增大,加工表面的缺陷增多,表面粗糙度和硬度增大,表面殘余應力逐漸由壓應力轉變成拉應力;隨著主軸轉速的增大,加工表面缺陷減少,表面粗糙度和硬度降低,殘余壓應力減小。在銑削速度超過800 r·min^-1、單道次銑削深度小于0.35 mm、進給量控制在0.045 mm·r^-1以下條件下,加工表面質量較好,表面粗糙度R_a在0.40 μm左右,殘余應力為壓應力,且無明顯硬化層。

The effects of spindle speed (300, 500, 650, 800, 1 200 r·min^-1), milling feed (0.030, 0.045, 0.060, 0.075, 0.090 mm·r^-1) and single pass milling depth (0.20, 0.35, 0.50, 0.65, 0.80 mm) on the machined surface integrity of nickel-based superalloy FGH4113A were investigated by milling tests. The results show that with increasing milling feed or single pass milling depth, the defects on the machined surface, surface roughness and hardness increased, and the surface residual stress gradually changed from compressive stress to tensile stress. With increasing spindle speed, the machined surface defects, surface roughness, hardness and residual compressive stress all decreased. When the spindle speed exceeded 800 r·min^-1, the single pass milling depth was less than 0.35 mm, and the milling feed was controlled below 0.045 mm·r^-1, the machined surface had good quality with surface roughness R_a of about 0.40 μm, compressive residual stress and no obvious hardening layer existing.