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

季晨曦; 王新华; 方园

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

更新时间：2026-01-21

- Morphology and Distribution of Ferrite in 304 Stainless Steel 2.0 mm Strip Produced by Twin-roll Concasting
- Special Steel Vol. 29, Issue 3, Pages: 10-12(2008)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：16 November 2007，
  
  Online First：20 December 2022，
  
  Published：20 December 2008
- 稿件说明：
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季晨曦, 王新华, 方园. Morphology and Distribution of Ferrite in 304 Stainless Steel 2.0 mm Strip Produced by Twin-roll Concasting[J]. Special Steel, 2008, 29(3): 10-12.
DOI：

季晨曦, 王新华, 方园. Morphology and Distribution of Ferrite in 304 Stainless Steel 2.0 mm Strip Produced by Twin-roll Concasting[J]. Special Steel, 2008, 29(3): 10-12. DOI：

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。

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.

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