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| EH36船板用钢探伤不合格原因分析 |
| ZHANG Huan 1,ZHANG Yuanpu 1 ,WANG Xiaodong 1,YU Hongwei 1,ZHANG Kaiguang 2 |
1. Echeng Iron & Steel Co., Ltd.， Baowu Group, Ezhou 436002， China；
2. Central Research Institute, Baowu Group, Wuhan 430080， China |
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Abstract 为找出EH36船板用钢探伤不合格的原因，将探伤不合格的钢板通过人工探伤缺陷定位取样，通过光谱仪、光学显微镜、电子探针等仪器，对试样的成分、组织进行分析，结果表明：EH36钢板基体组织为铁素体和珠光体，裂纹附近C、Mn、P元素偏析严重，且有大尺寸的MnS夹杂和高度富集的(Ti,Nb,V)化合物出现，裂纹开口处有马氏体和贝氏体异常组织形成。通过适当控制钢中S、P含量，优化精炼、连铸和加热工艺，可减轻铸坯中心偏析程度；采用细晶轧制和弱冷相结合，可抑制马氏体组织形成。综合以上措施可提高钢板探伤合格率。
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Received: 23 September 2021
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2022, Vol. 40 
