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某公司生产?12.5 mm、牌号82B线材时出现异常笼口断裂现象。取样进行理化检验分析,结果表明,导致外表无擦伤的82B盘条笼口平口断裂的原因是盘条表面氧化层下存在横向裂纹,该横向裂纹可能是钢坯内部或表层存在浇铸用保护渣引起的。
A company produces 12.5 mm, grade 82B wire with abnormal cage breakage. The results of physical and chemical analysis of the sample showed that the flat fracture of the 82B wire rod that caused the appearance of non-scratching was due to the horizontal cracks under the oxide layer on the surface of the wire rod. The transverse cracks may be caused by the mold flux inside or on the surface of the steel slab of.