| 含铌H13钢热疲劳过程中的显微结构变化 |
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| 引用本文： | 胡心彬,李麟,吴晓春.含铌H13钢热疲劳过程中的显微结构变化[J].金属热处理,2005,30(3):27-30. |
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| 作者姓名： | 胡心彬 李麟 吴晓春 |
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| 作者单位： | 1. 上海大学,材料科学与工程学院,上海,200072;湖北工业大学,机械工程学院,湖北,武汉,430068
2. 上海大学,材料科学与工程学院,上海,200072 |
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| 摘 要： | 对添加微量铌与不含铌的4Cr5MoSiV1钢(即H13钢)热疲劳性能进行了测试。结果表明，添加微量铌提高了4Cr5MoSiV1钢的热疲劳抗力。在热疲劳循环过程中，富铬碳化物M23C6粒子明显粗化。添加微量铌的4Cr5MoSiV1钢由于富铬碳化物的粗化受到抑止，且位错密度下降较慢，使得热疲劳裂纹的扩展相对缓慢，因而材料的热疲劳抗力提高。
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| 关 键 词： | 含铌H13钢 热作模具钢 热疲劳 碳化物粗化 |
| 文章编号： | 0254-6051(2005)03-0027-04 |
Microstructure Changes of H13 Hot Work Tool Steel with Niobium During Thermal Fatigue |
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| HU Xin-bin,LI Lin,WU Xiao-chun.Microstructure Changes of H13 Hot Work Tool Steel with Niobium During Thermal Fatigue[J].Heat Treatment of Metals,2005,30(3):27-30. |
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| Authors: | HU Xin-bin LI Lin WU Xiao-chun |
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| Affiliation: | HU Xin-bin~ |
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| Abstract: | The resistance to tempering softening,thermal stability and the thermal fatigue softening behaviour of 4Cr5MoSiV1 steel both with and without an addition of micro-niobium were studied.The results show that the resistance to tempering softening and thermal stability of H13 steel with micro-Nb is higher than that of the steel without niobium.The Cr-rich carbides particles are obviously coarsening during fatigue test.The addition of micro-niobium improves the thermal fatigue resistance of the steel,owing to the suppression of Cr-rich carbides coarsening and the dislocation density decreasing slowly. |
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| Keywords: | H13 steel with niobium hot work die steel thermal fatigue carbides coarsening |
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