目前很多的模具是由圆钢作为原材料加工制工而成的。因此模具钢材质量的高低对模具质量的好坏有着重大的影响。 低倍缺陷的检查观察面远较显微镜广,从边缘到中心都能观到,而显微镜高倍仅观察钢材横截面的1/4直径处。所以很多地方显微镜无法去发现的缺陷而低倍检查能够发现。如果说显微镜检查反映出模具钢材质量的深度,那么低倍检查则能反映出模具钢材 At present, many molds are made from round steel as raw material. Therefore, the level of mold steel quality mold quality has a significant impact on quality. Observation of low magnification defect inspection far more than the microscope, from the edge to the center can be seen, and microscope high magnification only observed at a quarter of the diameter of the steel cross-section. So many local microscopes can not find defects and low detection can be found. If microscopy reflects the depth of the quality of the mold steel, then the low inspection can reflect the mold steel