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以规则溶液亚点阵模型为基础,针对Fe-Nb-V-Ti-Mo-C-N合金系,基于多元复合析出相的固溶析出理论建立了复合碳氮化物在含钼低合金钢奥氏体中的析出热力学计算模型。结果表明:在高温阶段的析出相主要是TiN,而在低温阶段,析出相以富V复合碳化物为主;Mo元素几乎不从奥氏体中析出,Mo能够提高微合金元素(Nb、V、Ti)在奥氏体中的固溶度积,降低微合金元素和间隙元素的活度,大大延迟其析出过程。
Based on the rule-solution sub-lattice model, based on the solid solution precipitation theory of multi-component composite precipitates, the formation of Fe-Nb-V-Ti-Mo- In the precipitation thermodynamic calculation model. The results show that the precipitated phase is mainly TiN at high temperature, while the precipitated phase is mainly V-rich at low temperature. Mo is hardly precipitated from austenite. Mo can increase the content of microalloying elements (Nb, V , Ti) in austenite solid solution product, reducing the activity of microalloying elements and interstitial elements, greatly delayed the precipitation process.