热轧特厚钢板探伤不合原因分析  

Analysis on Unqualified Causes of Hot Rolled Extra-heavy Steel Plate by Ultrasonic Flaw Detection

作　　者：李云[1] 

机构地区：[1]鞍钢股份有限公司产品制造部,辽宁鞍山114021

出　　处：《鞍钢技术》2012年第6期45-50,共6页Angang Technology

摘　　要：对厚度70 mm以上探伤钢板缺陷进行分类、取样,通过金相检验及扫描电镜等手段对缺陷进行了分析。结果表明,探伤不合的主要原因是缩孔和疏松、三角区裂纹及应力裂纹。The defects on the surface of extra-heavy steel plates with thickness over 70 mm are classified and then sampled.Then the defects are examined and analyzed by means of macroscopic and metallographic examination together with scanning electron microscope（SEM）.The results show that the failure of flaw detection is caused by contraction cavities and central looseness or cracks in the triangle zone and stress cracks.

关 键 词：特厚钢板 探伤 裂纹 

分 类 号：TG142[一般工业技术—材料科学与工程]