纳米复相陶瓷超声磨削频率与表面质量关系的实验研究

Research on the Relation Between Ultrasonic Grinding Frequencies and Surface Quality for Al_2O_3-ZrO_2 Nano-Composite Ceramics

基于超声刻划试验得出超声振动下单颗磨粒去除材料方式的变化,从本质上解释了超声磨削下表面质量提高的原因.超声振动作用会导致材料的磨削层表面等效硬度急剧降低,材料去除方式从脆性向塑性转变,且随频率升高现象更为明显.实验结果表明,超声磨削下纳米复相陶瓷材料的表面质量高于普通磨削,且超声振动频率的升高对提高表面质量有促进作用.

The relationship between the ultrasonic grinding surface quality of Al_2O_3-ZrO_2 nano-composite ceramics and the ultrasonic grinding frequencies was researched.Based on the ultrasonic single-point scratching test,the change of material removing style illustrates the improvement of surface quality with ultrasonic grinding.The reduced equivalent rigidity of the surface under ultrasonic vibration leads to a removal mode transition from brittle to ductile.And this phenomenon becomes more evident as frequency increases.The research shows that,the surface quality with ultrasonic vibration is superior to that without ultrasonic vibration,and the increasing frequency can contribute to the improvement of the surface quality.