Q345R钢板超声波探伤不合的原因分析

钢铁, 2011, 46(3): 66-70.

1.钢铁研究总院冶金工艺研究所,北京,100081

2.重庆钢铁股份有限公司,重庆,400081

3.钢铁研究总院冶金工艺研究所,北京,100081

4.钢铁研究总院冶金工艺研究所,北京,100081

Analysis on Disqualification of Q345R Steel Plate by Ultrasonic Detection

为找出Q345R钢板超声波检测不合原因,采用低倍、金相、扫描电镜检验和断口形貌分析对探伤不合钢板进行研究,发现引起探伤不合的主要原因是钢板中心存在微裂纹,微裂纹产生的原因在于心部条状MnS、氮化物夹杂的聚集以及马氏体、贝氏体硬性组织的出现.

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