磁力研磨对Inconel718合金表面质量的影响

摘要

为改善镍基高温合金Inconel718制造零部件的表面质量,降低其表面粗糙度,基于磁力研磨加工方法,选用雾化快凝法制备的Al2O3球形磁性磨料,对Inconel718合金样件进行光整加工.探究了主轴转速、进给速率、加工间隙和磨料填充量对Inconel718合金表面粗糙度的影响,获得了较佳的磁力研磨参数:主轴转速1000 r/min,进给速率10 mm/min,加工间隙2 mm,磨料填充量2.5 g.在优化的工艺参数下对Inconel718合金样件磁力研磨20 min,试样的表面粗糙度由原始的0.359μm下降到0.036μm,达到镜面效果.由此表明,磁力研磨对Inconel718合金具有良好的光整加工效果.%Magnetic abrasive finishing was conducted on the surface of Inconel718 nickel-based superalloy with spherical and magnetic Al2O3 abrasives produced by gas atomization/rapid solidification technique to reduce its surface roughness and improve its surface quality. The effects of grinding conditions including spindle speed, feed rate, machining gap and abrasive filler amount on surface roughness of Inconel718 alloy were studied. The optimal parameters were obtained as follows: spindle speed 1000 r/min, feed rate 10 mm/min, machining gap 2 mm and abrasive filler amount 2.5 g. The surface roughness of Inconel718 alloy is reduced from 0.359μm previously to 0.036μm after magnetic abrasive finishing under the optimal conditions for 20 min, showing a mirror effect. It is indicated that a perfect finishing effect can be achieved for Inconel718 alloy by magnetic abrasive finishing.