ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2008, Vol. 29 ›› Issue (3): 10-12.

• 试验研究 • 上一篇    下一篇

双辊连铸304不锈钢2.0 mm薄带中铁素体的形态与分布

季晨曦1, 王新华1, 方园2   

  1. 1北京科技大学冶金与生态工程学院,北京100083;
    2宝钢研究院前沿技术研究所,上海201900
  • 收稿日期:2007-11-16 出版日期:2008-06-01 发布日期:2022-12-20
  • 作者简介:季晨曦(1980-),男,在读博士生,2001年东北大学毕业,双辊薄带连铸工艺研究。
  • 基金资助:
    国家自然科学基金资助项目(50434040)

Morphology and Distribution of Ferrite in 304 Stainless Steel 2.0 mm Strip Produced by Twin-roll Concasting

Ji  Chenxi1, Wang  Xinhua1, Fang  Yuan2   

  1. 1 School of Metallurgical and Ecological Engineering,University of Science and Technology,Beijing 100083;
    2 Advanced Technology Institute,Technology Center,Baosteel,Shanghai 201900
  • Received:2007-11-16 Published:2008-06-01 Online:2022-12-20

摘要: 采用化学侵蚀、彩色金相显示和电子探针(EPMA)分析研究了304奥氏体不锈钢(%:0.08C、1.37Mn、0.62Si、17.77Cr、9.09Ni)2.0 mm连铸薄带内残留铁素体的形态和分布。结果表明,在薄带表层铁素体呈棒状,其间距≤20μm;在薄带柱状树枝晶区,铁素体位于一次枝晶臂和二次枝晶臂中心,铁素体二次枝晶间距≤10μm;在中心等轴晶区,残留铁素体形貌和分布与等轴晶区半固态形成机理有关。先凝固的固相颗粒内部铁素体为弯曲树枝状和网状形貌,固相颗粒间隙铁素体呈岛状形貌。

关键词: 双辊2.0 mm薄带连铸, 304奥氏体不锈钢, 铁素体

Abstract: The morphology and distribution of retained ferrite in 304 austenite stainless steel(0.08C,1.37Mn, 0.62Si,17.77Cr,9.09Ni)2.0 mm cast strip have been studied by chemical etching,colour metallurgraphy and electro- probe microanalyser(EPMA).Results showed that the ferrite in strip surface area presented rod-like morphology and the space between rod was ≤20 μm; in columnar dendrite area,the ferrite located at center of both primary and secondary dendrite arms and the space between ferrite secondary arms was ≤10 μm; in center of strip-equiaxed zone, the morpholo- gy and distribution of ferrite was related to semisolid formation mechanism of equiaxed grains.The ferrite in initially solidi- fied solid-phase particles presented curved dendrite and netlike morphology,while the ferrite in inter-space of initially solid- ified particles presented island morphology.

Key words: Twin-roll 2.0 mm Strip Concasting, 304 Austenite Stainless Steel, Ferite