| 50kg／m钢轨轨腰分层缺陷的研究 |
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| 引用本文： | 许庆太,唐有达.50kg／m钢轨轨腰分层缺陷的研究[J].钢铁,1995,30(11):33-37. |
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| 作者姓名： | 许庆太 唐有达 |
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| 作者单位： | 鞍山钢铁公司，鞍钢钢研所 |
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| 摘 要： | 通过低倍金相和扫描电镜观察及能谱分析，得出５０ｋｇ／ｍ钢轨轨腰分层缺陷是由于钢锭头部缩孔降到钢锭本体截口以下，硅酸盐杂物破坏钢轨轨腰金属连续性造成的，采用５０ｋｇ／ｍ钢轨的钢锭模小保温帽改为大保温帽，基本消除了这种缺陷。
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| 关 键 词： | 钢轨 轨腰 分层缺陷 缺陷 |
INVESTIGATION OF 50kg /m HEAVY RAIL WEB LAYER-BUILT DEFECT |
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| XU Qingtai ,TANG Youda, HUANG Fengjun.INVESTIGATION OF 50kg /m HEAVY RAIL WEB LAYER-BUILT DEFECT[J].Iron & Steel,1995,30(11):33-37. |
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| Authors: | XU Qingtai TANG Youda HUANG Fengjun |
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| Affiliation: | Anshan Ifon & Steel Co. |
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| Abstract: | The layer-built defect in 50 kg/m heavy rail web has been studied by means of macrostructural and metallographic examinations , SEM and energy spectrum analysis. It has been found that its formation is caused by shrinkage cavity descending below thermal insulating sinkhead of ingot mould and silicate inclusion separating the metal of rail web.This kind of flaw has been basically eliminated after small thermal insulating sinkheads were replaced by big ones. |
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| Keywords: | kg /m heavy rail web layer-built defect shrinkage cavity small thermal insulating sinkheads big thermal insulating sinkheads |
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