热轧酸洗板表面氧化缺陷分析

采用体视显微镜、扫描电镜和能谱仪等分析研究了热轧酸洗板表面的氧化物缺陷。结果表明，缺陷区为酸洗后暴露出的基体铁和沿轧向分布的在高温下形成的破碎氧化铁皮。由于氧化铁皮被压入钢板中，在后续除鳞和酸洗中均难以去除，最终成为表面缺陷。

Analysis on Oxide Defect at Surface of Hot-rolled and Pickled Plate

An oxide det＇ect at surface of hot-rolled and pickled plate was investigated by using stereo-microscope, SEM and EDS. The results show that the defective regions are iron substrate exposed owing to pickling and longitudinally distrihuted broken iron scale formed at high temperature. The iron oxide scale is hard to he removed by subsequently descaling and pickling hecause of being pressed into the plate, thus becoming a surface defect.