| 304奥氏体不锈钢亚快速凝固组织演化和形成机理 |
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| 引用本文： | 申丽娟,邢淑清,麻永林,白亮,李德发,李建飞.304奥氏体不锈钢亚快速凝固组织演化和形成机理[J].特殊钢,2012,33(4):53-56. |
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| 作者姓名： | 申丽娟 邢淑清 麻永林 白亮 李德发 李建飞 |
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| 作者单位： | 1内蒙古科技大学材料与冶金学院，包头014010；
2济源钢铁集团公司，济源459000 |
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| 基金项目： | 国家自然科学基金项目资助，国际科技合作项目 |
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| 摘 要： | 通过感应炉熔化的304钢(/%:0.053C、0.55Si、1.50Mn、0.030P、0.002S、17.02Cr、8.01 Ni、0.50Cu、0.08Mo)直接浇铸在水冷铜模上得到厚7 mm直径25 mm的圆形试样,研究了Cr、当量/Ni当量和1.5～1 000℃/s的冷却速率对奥氏体不锈钢铸态凝固组织形态和分布的影响。结果表明,随冷却速率增加至75～90℃/s,该钢的凝固模式由FA(铁素体-奥氏体)模式向AF(奥氏体-铁素体)模式转变,初生相由枝晶铁素体转变成枝晶奥氏体,但冷却为～1 000℃/s时,观察到块状铁素体组织,并且枝晶状奥氏体转变成胞状奥氏体。
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| 关 键 词： | 304奥氏体不锈钢 亚快速凝固 Cr当敏/Ni当量 冷却速率 组织形态 |
| 收稿时间： | 2012-01-19 |
Formation Mechanism and Structure Evolution of Austenitic Stainless Steel 304 during Solidification with Near-Rapid Rates |
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| Shen Lijuan
,
Xing Shuqing
,
Ma Yonglin
,
Bai Liang
,
Li Defa
,
Li Jianfei.Formation Mechanism and Structure Evolution of Austenitic Stainless Steel 304 during Solidification with Near-Rapid Rates[J].Special Steel,2012,33(4):53-56. |
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| Authors: | Shen Lijuan Xing Shuqing Ma Yonglin Bai Liang Li Defa Li Jianfei |
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| Affiliation: | 1 Materials and Metallurgy School, Inner Mongolia University of Science and Technology, Baotou 014010;
2 Jiyuan Iron and Steel Group Co, Jiyuan 459000) |
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| Abstract: | The effect of Creq/Nieq and cooling rate（1.5～1 000℃/s） on structure morphology and distribution of ascast solidification structure of austenite stainless steel 304（/%:0.053C,0.55Si,1.50Mn,0.030P,0.002S,17.02Cr, 8.01 Ni,0.50Cu,0.08 Mo） is studied by induction furnace melting the steel and direct-casting on a water-cooling copper mold to get a sample with 7 mm thickness and 25 mm diameter.Results show that with increasing cooling rate to 75～90℃/s,the primary solidification mode of steel transferred from FA（ferrite-austenite） mode to AF（austenite-ferrite） mode, the primary phase is modified from dendritic ferrite to dendritic austenite,as the cooling rate is～1 000℃/s,the blocky ferrite structure is observed,and the dendritic austenite is replaced by cellular austenite. |
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| Keywords: | Austenite Stainless Steel 304 Near-Rapid Solidification Creq/Nieq Cooling Rate Structure Morphology |
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