| 包晶钢铸坯裂纹形成机理的实验研究 |
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| 引用本文： | 高仲,张兴中,姚书芳.包晶钢铸坯裂纹形成机理的实验研究[J].钢铁研究学报,2009,21(10):8-8. |
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| 作者姓名： | 高仲 张兴中 姚书芳 |
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| 作者单位： | 1. 中冶连铸北京冶金技术研究院,北京,100081
2. 中国钢研科技集团公司,北京,100081 |
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| 基金项目： | 国家863计划资助项目 |
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| 摘 要： | 针对包晶钢在连铸生产中铸坯裂纹出现较严重,选用具有相似收缩特征的Ag-Zn合金作为研究对象,开展定向凝固实验.研究得出,包晶钢包晶相变过程中包晶转变(δ→γ)阶段引起的收缩是导致铸坯裂纹的主要原因.与过包晶钢相比,亚包晶钢因在包晶相变过程中有较多的δ铁生成量和较少富余液相的补缩,铸坯更容易出现裂纹.亚包晶钢铸坯裂纹较低碳钢严重,是因为低碳钢发生包晶转变的温度低,避开了钢的零强度和零塑性温度区.
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| 关 键 词： | 包晶钢 包晶转变 裂纹 |
| 收稿时间： | 2008-06-11; |
Experimental Research on Mechanism of Cracks In Continuous Casting of Peritectic Steel Slabs |
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| GAO Zhong.Experimental Research on Mechanism of Cracks In Continuous Casting of Peritectic Steel Slabs[J].Journal of Iron and Steel Research,2009,21(10):8-8. |
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| Authors: | GAO Zhong |
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| Abstract: | The solidification of Ag-Zn alloy, which has similar shrinking properties to Fe-C alloy during peritectic phase transformation, was studied in this paper. The unidirectional solidification experiment was performed to investigate the solidification microstructure, the relationship between the shrinkage during peritectic phase transformation and the generation of crack on the slab was analyzed. The results indicate that the crack is mainly cause by shrinkage during perirtectic phase transformation(δ→γ) ,and for this reason, the subperitectic steel bears more crack than other kinds of steel. |
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| Keywords: | peritectic steel peritectic transformation crack |
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