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前言钢中氢将造成白点和鱼眼缺陷,对钢的质量产生严重影响。关于鱼眼的本质、断口特征、形成过程的研究已多有报道,但对其微观特征的研究尚不多。本文采用S600扫描电子显微镜对3C钢连铸坯拉伸断口的鱼眼微观特征进行了研究。一、试验方法试验用3C钢的化学成分为0.11％C、0.24％Si、0.76％Mn、0.021％S、0.019％P。试样取自转炉冶炼的连铸坯。铸坯横截面尺寸为210×1050mm。拉伸试样沿铸坯厚向切取。采用扫描电子显微镜对断口进行微
Introduction Hydrogen in steel will cause white spots and fisheye defects that have a serious impact on the quality of the steel. There have been many reports on the nature of fisheyes, fracture characteristics and formation process, but few studies on their microscopic features. In this paper, S600 scanning electron microscopy of 3C steel billet tensile fracture of the fish eye microscopic characteristics were studied. First, the test method The chemical composition of the test 3C steel 0.11% C, 0.24% Si, 0.76% Mn, 0.021% S, 0.019% P. Samples taken from the converter smelting slab. Billet cross-sectional size of 210 × 1050mm. Tensile specimens taken along the thickness of the slab. Using scanning electron microscopy of the fracture micro