| Nb对灰铸铁热疲劳性能的影响 |
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| 引用本文： | 朱洪波,闫永生,孙小亮,华勤,翟启杰.Nb对灰铸铁热疲劳性能的影响[J].现代铸铁,2011(2):45-48. |
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| 作者姓名： | 朱洪波 闫永生 孙小亮 华勤 翟启杰 |
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| 作者单位： | 上海大学,材料科学与工程学院,上海,200072 |
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| 基金项目： | 中信-CBMM铌钢研究与开发基金，上海大学研究生创新基金 |
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| 摘 要： | 采用Uddeholm热疲劳方法测定了Nb对灰铸铁热疲劳性能的影响,试验结果表明：（1）Nb的加入能够提高灰铸铁的抗热疲劳性能,随着w（Nb）的增加,试样最大裂纹深度和宽度都逐渐减小;（2）由于Nb细化石墨使裂纹源减少和裂纹扩展途径变细,Nb元素能够改善材料表面经热疲劳处理后恶化的性能。
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| 关 键 词： | 灰铸铁 Nb 热疲劳 |
Influence of Niobium on Thermal Fatigue Properties of Gray Cast Irons |
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| ZHU Hong-bo,YAN Yong-sheng,SUN Xiao-liang,HUA Qin,ZAI Qi-jie.Influence of Niobium on Thermal Fatigue Properties of Gray Cast Irons[J].Modern Cast Iron,2011(2):45-48. |
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| Authors: | ZHU Hong-bo YAN Yong-sheng SUN Xiao-liang HUA Qin ZAI Qi-jie |
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| Affiliation: | ZHU Hong-bo,YAN Yong-sheng,SUN Xiao-liang,HUA Qin,ZAI Qi-jie(Materials Science and Engineering College,Shanghai University,Shanghai 200072,China) |
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| Abstract: | By adopting Uddeholm thermal fatiguing method,the influence of niobium on the thermal fatigue properties of the gray cast irons was tested.The results showed:(1)Niobium addition could improve the thermal fatigue resistance of the gray cast irons.Both the maximum cracking depth and width gradually reduced with increase of the niobium adding amount;(2)Since the niobium could make the graphite finer,reduce the number of cracking sources and make the crack extending tracks narrower,therefore it could reduce the... |
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| Keywords: | gray cast iron niobium thermal fatigue |
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