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用金相技术结合电子探针对双辊薄带连铸带坯的纵裂纹成因进行了分析。认为是由于铸造时热传导、铸带宽度方向的温度及应力不均,使最大应力超过各温度下的允许值而造成的。
The cause of longitudinal crack in twin roll strip was analyzed by metallographic technique and electron probe. It is considered that due to the heat conduction during casting, uneven temperature and stress in the width direction of the casting belt cause the maximum stress to exceed the permissible value at each temperature.