优质碳素结构钢板探伤不合格原因分析  

Causes Analysis on Disqualification of Quality Carbon Structural Steel Plate in Flaw Detection

作　　者：高旭辉 温志红 杨太阳 Gao Xuhui;Wen Zhihong;Yang Taiyang(Baowu Group Guangdong Shaoguan Iron and Steel Co.,Ltd.)

机构地区：[1]宝武集团广东韶关钢铁有限公司

出　　处：《宽厚板》2019年第3期37-39,共3页Wide and Heavy Plate

摘　　要：针对优质碳素结构钢板超声波探伤不合格的现象,采用低倍检验、金相检验、能谱分析及N、H、O测定等手段,从探伤不合格部位取样进行分析,认为钢中长条状MnS夹杂物、H含量高和碳偏析是造成钢板超声波探伤不合格的主要原因。通过控制钢中MnS夹杂物、H含量和碳偏析等,提高钢水纯净度,有效地改善钢板内部质量。For the disqualifcation phenomenon of quality carbon structural steel plate in ultrasonic testing,specimens taken from the disqualified portion of steel plate in flaw detection are analysed by means of macroscopic test,metallographic test,energy spectrum analysis and determination of N,H,O.The results show that the long strip type MnS inclusion,high H content and carbon segregation are the major causes of the ultrasonic flaw detection disqualification.By controlling MnS inclusion,H content and carbon segregation in steel,cleanliness of molten steel and soundness of steel plate are effectively improved.

关 键 词：优碳板 超声波探伤 夹杂物 碳偏析 

分 类 号：TG115.285[金属学及工艺—物理冶金] TG142.31[金属学及工艺—金属学]