Al_2O_3颗粒增强铝基复合材料激光加热辅助切削的切削特性

Laser-assisted Hot Cutting Characteristics of Al _2O_3 Particle Reinforced Al-matrix Composite

利用 YAG激光对 Al2 O3颗粒增强铝基复合材料加热 ,进行车削试验 ,通过对切削过程中的三向切削力、刀具磨损、切削表面参与应力及表面组织成分的分析 ,利用组织错配理论建立了颗粒增强金属基复合材料切削的物理模型 ,阐述了颗粒增强型铝基复合材料激光加热辅助切削的内部作用机理 ,利用物理模型解释了复合材料激光加热辅助切削过程中切削力下降、刀具磨损降低。

The particle reinforced metal matrix composites (PRMMC) are more and more widely used for their excellent physical and chemical properties. However, their poor machinability limits their applications. Laser assisted hot cutting (LAHC) is an efficient method to settle the problem. In this paper, LAHC is adopted in cutting Al 2O 3 particle reinforced aluminum matrix composite (Al 2O 3p/Al) and the PRMMC's cutting physical model is set up with the theory of microstructure misfit, on the basis of analyzing the cutting force, tool wear, and the microstructure and residual stress on the machined surface. The PRMMC's interior mechanism of the LAHC, the reduction of the cutting force and the tool wear, and the improvement of the cutting surface mechanics performance is indicated with the physical model. The model will be as the base and orientation of the further related researches and applications.