块体金属玻璃微磨削加工的温度场仿真

建立单颗磨粒微磨削的正交切削模型和玻璃金属的本构关系方程，采用有限元工艺仿真系统对块体金属玻璃进行微磨削加工的温度场仿真，从而得到块体金属玻璃在微磨削过程中的温度以及温度变化趋势，进而观察其磨削温度是否达到块体金属玻璃的玻璃转变温度.因此，对玻璃金属磨削加工过程的温度仿真可以有效预测非晶表面是否有晶化现象的发生.改变微磨削加工参数，对块体金属玻璃的各个磨削区的温度变化趋势进行观察.通过仿真实验发现，块体金属玻璃的最高磨削温度发生在磨粒前刀面与磨屑接触的区域，即第二变形区.

Simulation of Temperature Field for Bulk Metallic Glass in Micro-scale Grinding

The orthogonal cutting model of single grain and constitutive equation of glass metal are established， and the micro grinding temperature field of bulk metallic glass is simulated using the finite element simulation system. The grinding temperature of bulk metallic glass and the temperature change trend in micro grinding process are acquired， and then the relationship between the grinding temperature and the glass transition temperature of bulk metallic glass is observed. Consequently， the simulation of the grinding temperature of the bulk glass metal can effectively predict the crystallizing procedure of the grinding surface. With various micro grinding parameters， the temperature variation trend of the grinding zone of bulk metallic glass is observed. The simulation results show that the highest grinding temperature of bulk metallic glass occurs in the contact area between the abrasive rake surface and the grinding chips， i.e. the secondary deformation zone.