| DH36船板探伤缺陷的成因分析和对策 |
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| 引用本文： | 魏立国,胡执虎,李佩忠.DH36船板探伤缺陷的成因分析和对策[J].宝钢技术,2008(4). |
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| 作者姓名： | 魏立国 胡执虎 李佩忠 |
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| 作者单位： | 宝钢分公司,制造管理部,上海,201900;宝钢分公司,制造管理部,上海,201900;宝钢分公司,制造管理部,上海,201900 |
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| 摘 要： | 超声波探伤不合是DH36船板钢的主要缺陷之一.通过低倍酸洗试验、金相分析、断面形貌分析,发现了船板内部缺陷的成因,即钢板中存在过量的氢.分析了造成钢板内部氢致裂纹的原因.为消除DH36船板氢致裂纹,有针对性地提出了以RH精炼为主的全流程控氢、降低板坯偏析程度、采用钢板轧制后缓冷等措施.实施后,氢致缺陷消除,钢板质量明显提高.
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| 关 键 词： | DH36船板 超声波探伤 氢 厚板 |
Genesis Analysis and Countermeasures on UST Defect in DH36 Hull Plate |
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| Wei Liguo,Hu Zhihu,Li Peizhong.Genesis Analysis and Countermeasures on UST Defect in DH36 Hull Plate[J].Baosteel Technology,2008(4). |
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| Authors: | Wei Liguo Hu Zhihu Li Peizhong |
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| Affiliation: | Wei Liguo,Hu Zhihu,Li Peizhong(Manufacturing Management Dept.,Baosteel Branch,Shanghai 201900,China) |
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| Abstract: | Inner defects shown on the UST(ultrasonic test) are the main factors that affect the quality of DH36 hull plate.Through analyzing the macroscopic morphology,metallographic specimen and SEM fractography of the plate,it has been proved that the defects in the heavy plate were caused by excessive hydrogen.The genesis of hydrogen-induced cracking has been discussed in this paper.In order to avoid inner cracks caused by hydrogen in DH36 hull plate,some effective countermeasures were proposed,such as,to control t... |
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| Keywords: | DH36 hull plate ultrasonic test(UST) hydrogen heavy plate |
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