Counts by the experiment indicated that, the bearing expiration as a result of the bearing surface flaw which in the bearing expiration form, which causes the crack, the crack creates to reach 65%.
由实验统计表明：在轴承的失效形式中，由于轴承辊子表面的缺陷而引起的裂纹、裂缝造成的轴承失效达65%。
Triangle crack, linearity crack and slag eye are main form of surface wrapped slag in continuously cast billet.
三角口裂纹、直线裂纹和渣孔是连铸坯表面夹渣的主要表现形式。
The stress required for producing internal crack decreases since there are loci of cracks in the slab caused by the surface crack, so the longitudinal cracks from inner to surface form easily.
由于铸坯表面裂纹形成的裂纹灶，降低了产生内裂所需要的应力值，易于形成内、外相连的纵裂。
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