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首页> 外文会议>International conference on high strength low alloy steels >Two-sublattice thermodynamic model on carbonitride precipitation in microalloyed steels bearing Nb-V-Ti
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Two-sublattice thermodynamic model on carbonitride precipitation in microalloyed steels bearing Nb-V-Ti

机译：微合金钢含有NB-V-Ti的微合金钢中碳氮化物沉淀的两个子分子热力学模型

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摘要

Based on the two sublattice model of the regular solution, one being metal atom sublattice and another being interstitial atom sublattice, a thermodynamic model for the precipitates of niobium carbonitride, vanadium carbonitride and titanium carbonitride was established to study the starting-temperature of precipitates and the austenite compositions at given temperature in a low carbon steel. The calculation results show that starting-temperature of the precipitation of niobium carbonitride,vanadium carbonitride and titanium carbonitride are 1100°C, 920°C and 1340°C, respectively, the mole fraction of carbonitride precipitates is 8.65×10-4 in the 0.053C-0.0028N-1.28Mn-0.008S-0.031Al-0.046Nb-0.008Ti-0.029V-Fe steel. When the N content is from 0.0028％ to 0.0056%, the starting-temperature of the precipitation of the titanium carbonitride changes from 1340°C to 1430°C. And the C content is from 0.053% to 0.07%, the starting-temperature of the precipitation of the titanium carbonitride hardly changes, but the atomic fraction of niobium in the carbonitride obviously increases.
机译：基于正则溶液，其中之一是金属原子亚晶格的两个亚晶格模型和另一个是填隙原子亚晶格中，铌的碳氮化物，钒的碳氮化物和碳氮化钛的设立是为了研究析出物的起始温度和析出物热力学模型在给定温度下奥氏体的组合物中的低碳钢。计算结果表明，碳氮化铌的析出开始温度，钒碳氮化和碳氮化钛是1100℃，920℃，1340℃，分别，碳氮化析出物的摩尔分数在0.053 8.65×10-4 C-0.0028N-1.28Mn-0.008S-0.031Al-0.046Nb-0.008Ti-0.029V - 铁钢。当N含量为0.0028％至0.0056％时，碳氮化钛的析出的起始温度从1340℃，变化到1430℃。和C含量为0.053从％至0.07％时，碳氮化钛的析出的开始温度几乎不变化，但铌在碳氮原子分数明显增加。

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