| 70～100 mm厚低合金钢板探伤不合原因分析及控制 |
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| 引用本文： | 袁少威,许少普,王新,张强.70～100 mm厚低合金钢板探伤不合原因分析及控制[J].轧钢,2015,32(4):80-83. |
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| 作者姓名： | 袁少威 许少普 王新 张强 |
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| 作者单位： | 1.南阳汉冶特钢有限责任公司技术中心钢研所，河南南阳474500 ; 2.北京科技大学冶金与生态工程学院，北京100083 |
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| 摘 要： | 针对250 mm厚连铸坯轧制70~100 mm低合金厚板时超声波探伤不合格的问题，通过高倍、电镜等检测手段对缺陷钢板进行的分析表明：中心偏析、内部裂纹、疏松是导致钢板探伤不合的主要因素。通过改造连铸机的二次冷却系统、优化连铸工艺和轧制工艺、对铸坯和钢板实施缓冷后，厚度70~100 mm钢板探伤合三级率稳定到了90%以上。
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| 关 键 词： | 低合金 探伤 厚板 |
| 收稿时间： | 2014-07-28 |
Research and control of ultrasonic flaw detection defects of 70- 100 mm low alloy plate |
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| YUAN Shao- wei,XU Shao- pu,WANG Xin,ZHANG Qiang.Research and control of ultrasonic flaw detection defects of 70- 100 mm low alloy plate[J].Steel Rolling,2015,32(4):80-83. |
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| Authors: | YUAN Shao- wei XU Shao- pu WANG Xin ZHANG Qiang |
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| Affiliation: | 1.Iron & Steel Research Institute , Nanyang Hanye Special Steel Co., Ltd., Nanyang 474500, China ;2.School of Metallurgy and Ecological Engineering, University of Science & Technology Beijing, Beijing 100083, China |
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| Abstract: | In view of the ultrasonic flaw detection defects in 70- 100 mm plate produced by the billet of 250 mm continuous casting slab, the cause was analyzed by optical microscope and electron microscope. The result showed that center segregation, inner crack and porosity were the main reasons. After reforming the second cooling system of continuous casting process, optimizing the continuous casting technology and rolling technology, and adopting stacking slow cooling technology, the passing rate for third qualification reached 90 percent or more. |
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| Keywords: | Low alloy Ultrasonic test Thick plate |
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