09MnNiDR钢板探伤不合格原因分析及改进措施  

Causes Analysis and Corrective Measures of Disqualified 09MnNiDR Steel Plate in Flaw Detection

作　　者：张海军 石莉 董亚楠 林明新 东超山 Zhang Haijun;Shi Li;Dong Yanan;Lin Mingxin;Dong Chaoshan(HBIS Group Wusteel Company)

机构地区：[1]河钢集团舞钢公司

出　　处：《宽厚板》2022年第6期30-33,共4页Wide and Heavy Plate

摘　　要：通过取样研究探伤不合格09MnNiDR低温容器钢板的宏观及微观组织,对导致探伤不合格的缺陷产生原因进行分析。结合对冶炼、轧制工艺及设备状况等环节进行的比对,确定连铸机辊缝偏离标准要求造成铸坯中心偏析,严重时产生中心裂纹,是钢板探伤不合格的主要原因。采取设备精度校正和工艺改进措施,杜绝了此类问题的再次发生。The macrostructure and microstructure of disqualified 09MnNiDR steel plate for low temperature in flaw detection are studied by taking samples,the causes of the defects leading to flaw detection disqualification are analysed.Comparison is carried out in combination with steelmaking process,rolling process and equipment condition,which determines that the strand central segregation due to the deviation of caster roll gap to the standard requirement and the central cracks formed due to severe segregation are the major causes of the disqualified steel plate in flaw detection.By taking equipment precision calibration and process improvement measures,such problems are prevented from recurrence.

关 键 词：09MnNiDR钢板 超声波探伤 中心偏析 显微裂纹 

分 类 号：TG115[金属学及工艺—物理冶金] TG142.1[金属学及工艺—金属学]