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研究了IF钢表面划痕深度对热镀锌镀层及合金化镀层表面缺陷的影响、划痕部位镀层的生长过程、组织结构及合金化行为。试验及分析结果表明,热镀锌时锌液能够有效填充划痕凹陷,从而降低基板表面的划痕缺陷,但划痕缺陷可以遗传到合金化镀层表面;在镀层合金化过程中,与正常部位相比缺陷部位的合金化速度快;随着镀层合金化的进行,缺陷部位的Zn-Fe合金与正常部位的锌发生反应并生长,使缺陷部位的Zn-Fe合金的生成量增加,合金化镀层逐渐隆起。
The effects of scratch depth of IF steel on the surface defects of hot-dip galvanized and alloying coatings were studied. The growth process, microstructure and alloying behavior of the scratches were investigated. The results of the experiment and analysis show that the zinc solution can effectively fill the scratch depression when hot-dip galvanizing, thereby reducing the scratch defects on the substrate surface, but the scratch defects can be inherited to the alloy plating surface. During the alloying process of the coating, As the alloying of the coating progresses, the Zn-Fe alloy in the defect portion reacts with the zinc in the normal portion and grows to increase the amount of the Zn-Fe alloy formed in the defective portion, and the alloying Plating gradually bulging.