磁粉检测对钢管内表面质量的不良影响研究
Steel Pipe(2013)
Abstract
以某厂生产的无缝钢管经磁粉检测后管端内表面出现凹陷为例,通过对凹陷的宏观形貌、金相组织、硬度等检验分析,得出了凹陷产生的原因是磁粉探伤机电极表面氧化后与钢管内表面接触不良,局部区域电阻过大,导致钢管内表面发生熔化,同时产生电弧烧伤钢管内表面;并提出了防止钢管磁粉检测过程中产生管端凹陷的建议。
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Key words
steel tube melting,electric pole oxidization,magnetic particle detection,tube-end depression,electric arc,seamless steel tube
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