热镀锌板镀层耐剥离性研究

来源期刊：钢铁钒钛2010年第3期

论文作者：郭太雄 金永清 张勇 刘春富

文章页码：30 - 33

关键词：热镀锌板； 耐剥离性； 成形性

Key words：hot-dip galvanizing coating sheet； flaking-resistance； formability

摘    要：针对热镀锌板在冲压成形过程中镀层局部剥离的问题,在分析其微观特征的基础上,通过试验研究了镀层厚度、钢基强度及镀层铝含量对镀层耐剥离性的影响。结果表明:该镀层剥离实际上是镀层在厚度方向上远离镀层/钢基界面的局部脱落,而不是因镀层/钢基界面附着力较差所致的镀层整体脱落;随着镀层厚度的增加,镀层耐剥离性显著下降;随着钢基屈强比的增加,镀层耐剥离性下降;随着镀层铝含量的增加,镀层耐剥离性提高。

Abstract: For the issue of flaking of the hot-dip galvanizing coating during drawing,the microcosmic characteristics of the coatings have been analyzed and experiments have been done to investigate the influence of coating thickness,Al content and steel substrate strength on its flaking-resistance.The results show that the fact of flaking is that the coating partially flaked off at the position far away from interface of steel substrate and coating,and not entirely flaked off from steel substrate because of poor adhesion.The flaking resistance of coating decreases with the increase of coating thickness and steel substrate yield to strength ratio,and increases with the increase of Al content in coating at the same experimental conditions.