摘要
对Q235B中厚板表面缺陷处的显微组织、非金属夹杂物等进行了金相组织和扫描电镜观察及能谱分析。实验发现:钢水脱氧不良;缺陷周围分布着大量的氧化铁质点和非金属夹杂物。可见,这类缺陷是连铸坯上气泡和含夹杂的气囊在加热和轧制过程中胀裂后形成的,称气泡类缺陷。为此提出了相应的改进措施。
The surface defect on medium and heavy plate Q235B was investigated by means of the optical microscopy,scanning electron microscopy and energy spectrum analysis in this paper. The results show that the deoxidizing process of molten steel was imperfectly and a great amount of non-metallic inclusions and particle of iron oxide existed around the defects. Evidently, the reason of the bubble defects were non-metallic inclusions and bubbles formed in continuous casting slab, which expand during reheating and rolling. The surface defect belongs to bubble defect. The improvement measures for elimination of these defect are proposed.
出处
《物理测试》
CAS
2008年第1期14-17,共4页
Physics Examination and Testing
关键词
Q235B中厚板
气泡缺陷
非金属夹杂物
Q23SB medium and heavy plate
bubble defect
non-metallic inclusions
