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(二)金属的表面形貌照片1 a)、b)是经机械加工表面光洁度达到▽7和▽8的45号钢的表面,在S—550型扫描电镜下拍摄的。它和我们在机器中看到的▽8和▽12的光整的钢表面完全不同。这是因为,任何机器零件的表面,都是通过各种不同的方法加工而成的。由于加工过程中的刀痕,切屑分离时的塑性变形,以及机床——工件系统的振动等原因,造成实际加工出来的表面与理想的表面存在一定的几何形状误差。因而从微观看来,所有被加工表
(B) the metal surface morphology photos 1 a), b) is machined surface finish ▽ 7 and ▽ 8 of 45 steel surface, the S-550 scanning electron microscope shot. It is completely different from the polished steel surfaces we see in the machine for ▽ 8 and ▽ 12. This is because the surface of any machine part is machined by a variety of different methods. Due to the machining marks, the plastic deformation of the chip separation, as well as the machine - the workpiece system vibration and other reasons, resulting in the actual processing of the surface and the ideal surface there is a certain geometric error. Thus from the microscopic point of view, all the processed table