| 连铸坯横向裂纹和偏析带形成原因的分析 |
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| 引用本文： | 王长庆,何全德.连铸坯横向裂纹和偏析带形成原因的分析[J].特殊钢,1994,15(4):45-47. |
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| 作者姓名： | 王长庆 何全德 |
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| 作者单位： | 上钢五厂技术发展处 |
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| 摘 要： | ２０ＭｎＳｉ，２０钢和４５钢铸坯内部裂纹与偏析带相互混杂分布在柱状晶区。偏析带有较高的磷含量及ＭｎＳ夹杂。而这些ＭｎＳ夹杂在低倍酸蚀时由于选择腐蚀而造成了“裂纹”的假象，这些裂纹无法用超声进行预检。当轧制比在１５－２０时可基本消除这种缺陷。
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| 关 键 词： | 内部裂纹 偏析带 连铸坯 |
Analysis on Formation of Transverse Cracks and Segregated Band of Concasting Billets |
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| Wang Changqing,He Quande,Lu Chunyun, Sun Xianxi and Chen Juehong.Analysis on Formation of Transverse Cracks and Segregated Band of Concasting Billets[J].Special Steel,1994,15(4):45-47. |
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| Authors: | Wang Changqing He Quande Lu Chunyun Sun Xianxi and Chen Juehong |
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| Affiliation: | Shanghai No. 5 Steel Works |
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| Abstract: | It is observed that the internal cracks together with segregated narrow- band were developed at columnar zone of steel 20,45,20MuSt continuous casting billets. As MnS inclusions were eaten out at segregated narrow- band on macroetched sample, the imitative cracks were appeared, that couldn't be detected using ultrasonic testing. This defect eliminated essentially after rolling with forging ratio from 15 to 20. |
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| Keywords: | internal Cracks Segregated Band Concasting Billet |
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