中厚钢板探伤不合格原因分析  

Analysis of flaws detected by ultrasonic in heavy and medium steel plate

作　　者：杨小刚[1] 张立峰[1] 张瑞[1] 杨文[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《炼钢》2013年第6期48-52,共5页Steelmaking

基　　金：中国自然科学基金(资助号:51274034)

摘　　要：运用低倍及光镜观察组织、普通扫描电镜及Aspex自动扫描电镜研究夹杂物分布等手段分析了A709Gr50F钢板探伤不合试样,检验结果表明:在轧板的厚度中心出现了大量微裂纹,主要影响因素为带状组织及长条状MnS塑性夹杂物。Various means were used to analyze flaws in the rolling samples of A709Gr50F steel which were detected by ultrasonic. Both the low magnification organi- zation and the microstructures implicated that a large number of micro-cracks occurred in the thickness center of sample. They were mainly caused by banded structure and a long strip MnS plastic inclusions.

关 键 词：内部缺陷 带状组织 长条状硫化锰 弥散化分布 

分 类 号：TF777.1[冶金工程—钢铁冶金]