中文摘要：

针对300M超高强度钢切削加工性较差的问题,通过有限元仿真技术对300M钢的高速切削过程进行研究。在相关试验数据的基础上,创建高速切削仿真模型,研究切削过程中切屑形态、切削区的应力分布,以及切削速度、刀具几何角度的变化对切削力、切削温度的影响规律。仿真结果分析表明：仿真数据与试验数据的变化趋势基本相同,切削速度增大,切削温度随之升高,切削力先升高后下降;前角角度增大,切削力和切削温度都较大程度下降,应力向刀尖与工件接触区集中;后角增大,切削力和切削温度略有下降,但变化幅度较小。

英文摘要：

Aiming at the poor machinability of 300 M ultra-high strength steel,the high speed cutting process of300 M ultra-high strength steel was studied by using finite element method. The cutting simulation model was established on the basis of the relevant experimental data. The chip deformation and the stress distribution of cutting area in cutting process were studied. The effects of the cutting speed and tool geometry on the cutting force and cutting temperature were also studied. The simulation results showed that the change trend of the simulation data were basically the same as the experimental data. The cutting temperature increased and the cutting force decreased following increased with the increasing of cutting speed. When the tool rake angle increased,both the cutting force and the cutting temperature decreased to a great extent and the maximum stress focused on the tip and the rake face.Both the cutting force and the cutting temperature slightly decreased when the tool back angle increased,but the extent of change was very small.