一、概述在机器制造业中,灰铸铁的应用相当普遍,特别是机床床身、工作台等带滑动导轨的部件,大多采用未淬硬的灰铸铁。大家知道,铸铁的硬度指标是铸铁的重要指标之一,它反映出铸铁的加工性能,机械性能和摩擦性能,因此铸铁的硬度逐渐被大家所重 I. Overview In the machinery manufacturing industry, the application of gray cast iron is quite common, especially the machine bed, table and other parts with sliding rails, mostly unhardened gray cast iron. As we all know, cast iron hardness index is one of the important indicators of cast iron, which reflects the processing performance of cast iron, mechanical properties and friction properties, so the hardness of cast iron is gradually being weighed