针对鄂钢轧制的部分宽厚板表面出现结疤现象，应用金相显微镜、扫描电镜和能谱分析仪对Q345q热轧态钢板表面疤状物形态和成分进行观察，对形成原因进行分析并提出改进措施。结果表明:疤状缺陷为块状的非金属夹杂/渣，并在钢板表面形成凹坑，其成分为含有Si、Ti、Al、Ca、Mg的氧化物或硅酸盐、铝酸盐等，其主要为炼钢过程中的脱氧产物和合金的氧化产物。因此在生产过程中，通过去除钢水中夹杂物和清理铸坯等，减少非金属夹杂/渣，以提高钢板表面质量。
The configuration and chemical compositions of scar on hot rolled plate surface of bridge steel Q345q were analyzed by optical microscope, scan electron microscope and EDS analysis. The results show that the scar defects are non-metallic nubby inclusions or non-metal lards. Notches formed under the scar defects. The chemical compositions of the scars are oxides, silicates or aluminates containing Si, Ti, Al, Ca, Mg, which are formed in steel-smelting. So, steel plate face quality can be improved by removing non-metallic nubby inclusions in steel-smelting or cleaning plate slab before rolling.
参考文献
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| [2] | 济南钢铁集团总公司, 东北大学轧制技术及连铸自动化国家重点实验室 中厚板外观缺陷的种类、形态及成因[M]. 北京: 冶金工业出版社, 2005.[2] 张锦进. 中厚板生产[M]. 北京: 冶金工业出版社, 2005.[3] 陈星, 樊雷, 周昊明. Q345qD桥梁钢板的开发试制[J].柳钢科技, 2006, 4: 16-18. |
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