The results indicated that discontinuity of micro structure of work layer caused by in.homogeneous distribution of chemical composition, different pattern of carbide, mhomogeneity of hardness lead to large area of spalling and frther scrapping of roll.

• 结果表明，化学成分的不均匀分布，造成轧辊辊身工作层组织不连续、碳化拘形态各异使辊身工作层硬度不均匀，产生大面积剥落，最终导致轧辊报废。