| Nb对灰铸铁高温抗拉强度和抗氧化性的影响 |
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| 引用本文： | 朱洪波,闫永生,孙小亮,华勤,翟启杰.Nb对灰铸铁高温抗拉强度和抗氧化性的影响[J].现代铸铁,2011(2):49-51. |
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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： | 上海大学研究生创新基金，中信-CBMM铌钢研究与开发基金 |
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| 摘 要： | 研究了高温条件下,w（Nb）量为0.037%和0.11%对灰铸铁抗拉性能和抗氧化性能的影响,试验结果表明：w（Nb）量为0.037%时,试样为脆性断裂;w（Nb）量为0.11%时,产生了韧性断裂,试样断口出现了韧窝。铸铁加Nb后,石墨和珠光体得到细化,与此同时,富Nb相镶嵌于基体上,有利于提高灰铸铁的抗拉强度;Nb使石墨细化的作用也使氧原子难以进入基体内部,阻止氧化反应,有利于提高灰铸铁的抗氧化性。
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| 关 键 词： | 灰铸铁 Nb 高温性能 抗拉强度 抗氧化性 |
Influence of Niobium on High-Temperature Strength and Oxidation Resistance of Gray Irons |
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| ZHU Hong-bo,YAN Yong-sheng,SUN Xiao-liang,HUA Qin,ZHAI Qi-jie.Influence of Niobium on High-Temperature Strength and Oxidation Resistance of Gray Irons[J].Modern Cast Iron,2011(2):49-51. |
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| Authors: | ZHU Hong-bo YAN Yong-sheng SUN Xiao-liang HUA Qin ZHAI Qi-jie |
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| Affiliation: | ZHU Hong-bo,YAN Yong-sheng,SUN Xiao-liang,HUA Qin,ZHAI Qi-jie(Materials Science and Engineering College,Shanghai University,Shanghai 200072,China) |
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| Abstract: | The influence 0.037% and 0.11% of niobium on the tensile strength and oxidation resistance of gray irons under a high temperature condition was investigated.The test results showed that brittle breaking occurred with the specimen containing niobium of 0.037%,and ductile breaking occurred with the specimen containing niobium of 0.11%,and the fracture exhibited ductile dimple.Adding Nb into cast irons caused graphite and pearlite finer,and by the way,the Nb-rich phase embedded into the matrix that was benefic... |
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| Keywords: | gray iron niobium high temperature properties tensile strength oxidation resistance |
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