304不锈钢圆坯凝固组织优化

吴庆瑜; 赵静; 吕俊杰; 赵紫玉

doi:10.7513/j.issn.1004-7638.2018.01.022

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304不锈钢圆坯凝固组织优化

doi: 10.7513/j.issn.1004-7638.2018.01.022

1. 唐山科技职业技术学院冶金工程系, 河北唐山 063001;
2. 河北钢铁集团唐钢长材部, 河北唐山 063016

详细信息

作者简介:
吴庆瑜(1982—),男,河北唐山人,本科,主要从事钢铁质量控制和工艺改进工作,E-mail:281389207@qq.com。

中图分类号: TF76
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- 被引次数: 0
出版历程
- 收稿日期: 2017-04-25

Solidification Structure Optimization of 304 Stainless Steel

1. School of Metallurgical Engineering, Tangshan Vocational College of Science and Technology, Tangshan 063001, Hebei, China;
2. Long Products Department of Tangshan Iron and Steel Corporation, Hebei Iron and Steel Group, Tangshan 063016, Hebei, China

摘要

摘要: 为了解决304奥氏体不锈钢连铸圆坯穿管开裂问题, 进行了化学成分优化、使用末端电磁搅拌并合理控制过热度试验。试验结果表明:通过优化钢成分, 使铸坯心部组织中的δ铁素体面积分数由原来的8.6%降低至7.2%。优化成分后使用末端电磁搅拌使铸坯心部组织中的δ铁素体面积分数降低至5.8%, 而且分布比较分散, 未使用末端电磁搅拌的铸坯心部δ铁素体呈网状。过热度为30⁴0℃时对降低钢中δ铁素体含量有利。采取以上措施使304铸坯心部的δ铁素体含量明显降低, 穿管开裂现象明显改善。
- 304不锈钢 /
- 凝固组织 /
- 末端电磁搅拌 /
- 过热度 /
- 成分优化
Abstract: In order to reduce the crack of 304 austenitic stainless steel pipe,the experiments of composition optimization,F-EMS and superheat controlling have been done to optimize solidification structure.The area fraction of δ ferrite in structure of billet center decreases from 8.6 % to 7.2 % through composition optimization. By implement of F-EMS,The area fraction of δ ferrite in structure of billet center decreases to 5.8 % and distributes dispersively,the δ ferrite in the billet without F-EMS is net-like. The superheat between 30 ℃ and 40 ℃ is beneficial to reduce δ ferrite. The amount of δ ferrite in 304 billets decreases significantly by using above measures and the crack during piercing is improved significantly.
- 304 stainless steel /
- solidification structure /
- F-EMS /
- superheat /
- composition optimization