A32/A36船板钢拉伸试验分层缺陷原因分析及冶炼工艺改进
Lamination Defect Reason Analysis of A32/A36 Ship Steel Plate and Smelting Technics Improvement
摘 要
A32/A36船板钢在拉伸试验后出现了分层缺陷。利用光学显微镜、扫描电镜和能谱仪对分层缺陷严重的部位进行了分析。结果表明: 分层缺陷主要与铸坯中存在元素偏析形成的铌、钛碳化物和硫化物夹杂有关。提出了改进冶炼和轧制工艺等相关措施并应用于实际生产，使废品率由12%降低到5%。
分层缺陷
拉伸试验
中厚板
A32/A36 ship steel plate
lamination defects
tensile test
medium steelmaking
Abstract
Some phenomenon of lamination appeared after the tensile test of A32/A36 ship plate steel. The metallographic microscopy, scanning electron microscopy and energy spectrometer were carried on the analysis for the serious lamination defects. The results indicated that the lamination defects were mainly concerned with Nb, Ti carbide and the sulfide mixture formed by element segregation in casting plate. By the observation to steel making and steel rolling process, relevance measures and improvement such as smelting and rolling were proposed and applied to reality. The defective index was reduced from 12% to 5%.
中图分类号 TG335.5
所属栏目 质量控制与失效分析
基金项目
收稿日期 2009/4/23
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备注赵 鹏(1983-),男,硕士研究生。
引用该论文: ZHAO Peng,YUE Ke-xiang. Lamination Defect Reason Analysis of A32/A36 Ship Steel Plate and Smelting Technics Improvement[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2010, 46(3): 193～196
赵 鹏,乐可襄. A32/A36船板钢拉伸试验分层缺陷原因分析及冶炼工艺改进[J]. 理化检验－物理分册, 2010, 46(3): 193～196
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参考文献
【1】李艳梅, 朱伏先, 崔凤平,等. 中厚钢板分层缺陷的形成机制分析[J]. 东北大学学报:自然科学版, 2007, 28(7):1005．
【2】卢光熙. 金属学教程[M]. 上海: 上海科学技术出版社, 1985．
【2】卢光熙. 金属学教程[M]. 上海: 上海科学技术出版社, 1985．
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