管线钢板探伤不合格的原因分析及改进措施  

Analysis and Improvement on Causes of Nonconformity in Ultrasonic Detection for Pipeline Steel Plate

作　　者：王勇[1] 

机构地区：[1]济南钢铁集团有限公司,山东济南250101

出　　处：《江西冶金》2014年第1期32-34,共3页Jiangxi Metallurgy

摘　　要：针对某钢厂生产X60管线钢板时突然出现大批量超声波探伤不合格的情况,利用金相显微镜、电子显微镜及电子探针等手段对钢板探伤不合格部位进行了观察、分析。结果表明:钢板厚度中心位置硫化物、氧化物等夹杂物聚集引起的微裂纹是造成探伤不合格的主要原因。根据分析检测结果,提出了相应的工艺改进措施。A large number of unqualified X60 pipeline steel plates pop up after ultrasonic inspection in a steel factory. The unqualified part are observed and analyzed by means of metallographic microscope, electron microscope and electron probe testing. Re- suits show that the micro cracks which caused by gathering inclusions like sulfide and oxide at the center of steel plate thickness is the main cause of unqualified UT result. The corresponding improvement measures are put forward according to the analysis of test results.

关 键 词：X60管线钢板 超声波探伤 夹杂物 

分 类 号：TG142.41[一般工业技术—材料科学与工程]