摘要
通过金相、扫描电镜等手段,对引起S355G8+M钢板探伤不合格的原因进行了分析,检测结果表明,S355G8+M钢板中心存在以Al2O3-CaO为主的大型夹杂和钢板心部存在明显的偏析带是造成探伤不合的主要原因。通过在氢含量、夹杂物、钢板缓冷等方面采取系列工艺控制措施,实现了探伤合格率的大幅提升,改善了产品质量。
With means of metallographic and SEM, the reason for unqualified flaw detection in S355G8 ＋ M steel plate is analyzed. It is showed that there is a large - scale inclusion, mainly being AI： 03 - CaO, in cen- ter of the plate, and an obvious segregation band in core of the plate; and those are the main reason for the defect. With process control measures adopted in aspects of hydrogen content, inclusion and plate slow - cooling, the qualified rate in flaw detection gets increased by a great extent, the quality of products gets im- proved.
出处
《河北冶金》
2014年第7期72-74,45,共4页
Hebei Metallurgy
