摘要
对结构陶瓷磨削表面残余应力的产生机理进行了研究。采用金刚石单颗粒模拟砂轮磨削运动，通过改变切削参数和磨粒形状以真实模拟各种应力单独作用时对残余应力产生的影响，并用X射线衍射法测试表面残余应力。研究结果表明：陶瓷磨削残余应力主要由挤压应力、切削应力和热应力的综合作用引起；在这三种应力中，切削应力对残余应力的影响最小，挤压应力产生残余压应力，热应力产生残余拉应力。冷却条件显著影响残余应力。
The mechanism of formation of surface residual stresses on structuralceramics upon grinding is studied. Action of the grinding wheel is imitated by single grain diamonds. In order to imitate the individual stresses resulting in the residual stresses, various alterations have to be made on the cutting parameters andgrain shapes. Residual stresses on the surface are measured by way of X－raydiffraction. Research results show that the residual stresses are caused by the jointaction of compressive, cutting and thermal stresses. Among the three, effect of thecutting stress amounts only to a negligible amount, the compressive stress causesresidual compression stress, while the thermalstress causes the tensile stress. Theresidual stresses are markedly affected by cooling conditions.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
1998年第4期361-364,共4页
Acta Armamentarii
基金
教育部资助!TD96-013
关键词
陶瓷磨削
残余应力
产生机理
ceramics grinding, residual stresses, mechanism of formation
