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一、前言大型铸钢轧辊根据用途和轧机机架的要求而有不同的材质。从初轧辊、热轧支承辊的含0.5％C的低碳特殊铸钢轧辊,到大型精轧辊的含2.2％C的镍铬耐磨铸铁轧辊,有着各种类型的轧辊。这些轧辊基本上都是采用干型挂砂工艺的半金属型铸造的。然而,由于轧辊所要求的各种性能的特点,轧辊材质的强度。轧辊内部的质量,尤其是钢中磷偏析、硫化物和氧化物夹渣所造成的带状组织缺陷,以及1轴部位(即工艺
I. Introduction Large cast steel rolls have different materials depending on the application and the requirements of the mill stand. There are various types of rolls from low carbon special cast steel rolls with primary rolls, hot backup rolls with 0.5% C, to large finish rolls with 2.2% C nickel-chromium wear-resistant cast iron rolls. These rolls are basically semi-metal castings made using the dry-type sand-sanding process. However, the strength of the roll material is due to the characteristics of the various properties required for the roll. The internal quality of the roll, in particular the segregation of phosphorus in the steel, ribbon-like microstructure defects caused by sulfide and oxide inclusions, and the 1-axis part