重轨钢超声波探伤不合原因分析

来源期刊：钢铁2011年第3期

论文作者：吉玉 田青 任安超 齐江华

文章页码：34 - 37

关键词：重轨钢； 超声波探伤； 夹杂物

Key words：heavy rail steel； ultrasonic defect detection； inclusion

摘    要：针对重轨钢出现超声波探伤不合格的情况,通过金相制样、大样电解等手段,使用扫描电镜配合能谱仪分别对钢轨点状报警和连续报警试样进行了研究。结果表明,钢中夹杂物是造成重轨钢探伤不合的主要原因,点状报警主要由大颗粒夹杂物引起,而连续报警主要由细长条或链状夹杂物引起。通过对夹杂物的来源进行了分析,在工艺方面采取了相应的改进措施后,重轨的探伤合格率明显提高。

Abstract: Considering nonconformity in ultrasonic defect test of many heavy rail steel,the samples causing sport alarm and continuous alarm were researched by SEM and EDX.The results show that the defects in heavy rail steel are mainly caused by inclusions,spot alarms are caused by large inclusion and continuous alarms are caused by slender or line inclusion.The sources of large inclusion are analyzed and relevant improvement measures are taken,the percent qualified by ultrasonic defect detection have been greatly increased.