| 连铸坯中心偏析检测 |
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| 引用本文： | 杨建桃,田陆,包燕平. 连铸坯中心偏析检测[J]. 连铸, 2013, 32(4): 32-40 |
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| 作者姓名： | 杨建桃 田陆 包燕平 |
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| 作者单位： | 1. 湖南镭目科技有限责任公司, 湖南 长沙 410100 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： | 对连铸坯进行了一些常规的检测，包括原位分析、高倍观察、能谱扫描和枝晶腐蚀。检测结果说明Q345连铸坯的中心偏析主要是C元素的偏析。发现元素偏析点总与疏松等缺陷重合及负偏析谷常存在于正偏析峰两侧，佐证了疏松孔洞的负压抽吸作用引发中心偏析的观点。同时，检测结果还指出中心偏析由多种驱动因素，需要进一步研究枝晶生长和未凝固钢液的流动。
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| 关 键 词： | 中心偏析、负压抽吸作用、C元素偏析、珠光体增多 |
Test of Slabs Center Segregation |
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| YANG Jian-tao,TIAN Lu,BAO Yan-ping. Test of Slabs Center Segregation[J]. CONTINUOUS CASTING, 2013, 32(4): 32-40 |
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| Authors: | YANG Jian-tao TIAN Lu BAO Yan-ping |
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| Affiliation: | 1. RAMON Science and Technology Co., Ltd., Changsha 410100, Hunan, China 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Bejing 100083, China |
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| Abstract: | Some slabs were tested by using common detection methods, including in situ analysis, high magnification observation and dendrite observation. The results showed that the segregation of C element resulted in center segregation of Q345 steel slabs. It was found that the solute converging points superposed the micropores and the negative segregation valleys always adjoined the positive peaks. The phenomenon proved that the negative pressure sucking effect induces center segregation. Meanwhile, the results also showed that the slab center segregation was induced by muti-driving force. |
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| Keywords: | center segregation negative pressure sucking effect C element segregation increase of pearlite |
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