| 高合金热强钢热疲劳—蠕变裂纹的研究 |
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| 引用本文： | 陈菁,王永云.高合金热强钢热疲劳—蠕变裂纹的研究[J].湖北工业大学学报,1997,12(1):63-65. |
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| 作者姓名： | 陈菁 王永云 |
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| 作者单位： | [1]湖北工学院机械工程系 [2]武钢机械制造公司 |
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| 摘 要： | 对高合金热强钢的加热炉炉底板在使用过程中产生热疲劳裂纹的原因进行了分析，得出了国速裂纹扩展的主要因素是底板材质组织的不均匀性，尤其是使用过程因高温Ｈ２还原被加热工件中的硫，导致底板渗硫形成沿晶硫化物，使晶界弱化，在热应力作用下，萌生裂纹，并沿晶发展形成热疲劳裂纹，致使工件早期失效。
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| 关 键 词： | 热疲劳 硫化物 高合金热强钢 蠕变裂纹 合金钢 |
Study on Thermul Fatique Creep Crack of High Alloy Refractory Stell |
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| Chen Jing,Hu Shijun,Chen Huiming,Wang Yongyun,Wu Qingquan.Study on Thermul Fatique Creep Crack of High Alloy Refractory Stell[J].Journal of Hubei University of Technology,1997,12(1):63-65. |
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| Authors: | Chen Jing Hu Shijun Chen Huiming Wang Yongyun Wu Qingquan |
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| Affiliation: | Chen Jing Hu Shijun Chen Huiming Wang Yongyun Wu Qingquan |
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| Abstract: | The cause that makes high alloy refractory steel bottom plate of furrace produce cracks is analyzed in this paper.The conclusion is that the constituent and structural heterogeneity is a major factor of the quick crack extending, and especially it may form intercrystalline sulfide which weakens grain bourdary strength when thermal H 2 deoxidises S in the used workpiece. Therefore grain, boundary produces cyack, which will extend along the boundary form fatique cracks and make workpiecl fail undcr thermal stress. |
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| Keywords: | thermal fatique creep crack producing and extending sulfide inclusion |
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