冷镦钢线材表面裂纹形成原因分析

Analysis on Forming Reason of Surface Crack of Cold Heading Steel Wire Rod

根据冷镦钢线材生产及冷镦开裂的裂纹形貌 ,把裂纹分为平行连续裂纹、单条连续裂纹和断续裂纹 ,研究分析认为 ,平行连续裂纹是轧件存在耳子造成的 ,单条连续裂纹是由道槽或导卫划伤引起的 ,断续裂纹则是连铸坯表面裂纹造成的 ,针对产生裂纹的原因提出相应改进措施。

According to the crack shape on cold heading steel wire rod when producing and cold heading, the crack can be classified as continuous parallel crack,continuous single crack and discontinuous crack. It is considered by research and analysis that the continuous parallel cracks are due to ear existing in rolled piece,the continuous single crack is due to the fish tail caused by canal or guide way,the discontinuous cracks are due to the surface cracks on continuous cast billet. Aim at the causes for bringing cracks,the corresponding improving measures are put forward.