含Nb-Ti-Al的X100管线钢碳氮化物析出研究 |
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作者姓名: | 齐 亮 申邦坡 胡义锋 张迎晖 |
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作者单位: | 江西理工大学材料科学与工程学院 |
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基金项目: | 江西省教育厅基金资助项目(gjj1145) |
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摘 要: | 基于双亚点阵模型,建立X100管线钢(Nbx,Ti1-x)(CyN1-y)-AlN复合析出热力学模型。热力学模型计算结果表明,1 450~1 100K时,Nb析出量显著增大;1 800~1 400K时,Ti析出速度加快,AlN的析出温度为1 450K左右。TEM观察及EDS分析结果显示,1 173K时,有大量细小(Nb,Ti)(C,N)的析出物产生,Nb与Ti的原子比大于4;1 373K时,Nb与Ti的原子比接近1;1 523K时,以较大长条形、方形析出物为主,Nb与Ti的原子比小于0.43。热力学模型计算结果与JMatpro软件计算结果及EDS统计结果有较好的一致性。
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关 键 词: | 析出 回溶 管线钢 碳氮化物 热力学模型 |
收稿时间: | 2011/12/17 0:00:00 |
Precipitation and dissolution behaviors of carbonitride in Nb-Ti-Al X100pipeline steels |
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Authors: | Qi Liang Shen Bangpo Hu Yifeng and Zhang Yinghui |
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Institution: | (School of Material Science and Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China) |
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Abstract: | Based on an ideal two-sublattice model,a thermodynamic model for(Nbx,Ti1-x)(CyN1-y)-AlN complex precipitates was constructed.The calculation shows that: Nb precipitates significantly at the temperature range of 1 450 ~1 100 K;Ti precipitates fast at the temperature range of 1 800 to1 400 K;and the precipitation temperature of AlN is 1 450 K.TEM observation and EDS analysis demonstrate that,at the temperature of 1 173 K,a large number of small-size(Nb,Ti)(C,N) precipitates and the atomic ratio of Nb to Ti is greater than 4.When the temperature increases to 1 373 K,the atomic ratio approaches 1.And at the temperature of 1 523 K,the precipitates are mainly comparatively large strip and square,while the atomic ratio of Nb∶Ti is smaller than 0.43.The calculation results agree well with those obtained by JMatpro software and those by EDS. |
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Keywords: | precipitation dissolution pipeline steel carbonitride thermodynamic model |
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