固着磨料高速研磨工件表面硬化规律的研究

为研究固着磨料高速研磨工件表面硬度的变化规律，对加工零件的硬化现象与研磨工艺参数之间的关系进行了研究。结果表明，磨料粒度的增加，并未引起工件表面硬化程度的明显变化；随着研磨压力和速度的增加，工件表面硬化程度变大。分析认为，研磨后工件表面发生位错增殖，从而导致位错密度增加；同时由于位错运动导致的位错交割，是导致工件表面硬化的主要原因。该工艺具有节约磨料、环境污染小、加工工艺简单、加工质量好、加工效率高等优点。

Study on the Face Hardening Discipline on High-speed Grinding Parts based on Fixed Abrasive

In order to study the change discipline on the face hardening of high-speed grinding parts based on fixed abrasive,the relationship between process parameters and the grinding hardening phenomenon is studied. The results show that the increase of abrasive particle size does not lead to the changes of surface hardening level obviously,and with the increases of polishing pressure and speed, the degree of surface hardening is higher. We think that the dislocation proliferation happened on the surface after grinding lead to the increase of dislocation density. Meanwhile, the dislocation delivery caused by dislocation movement is the main reason for surface hardening. This process has many advantages such as can save abrasion, less pollution,easier processing, better processing quality and higher efficiency.