含Nb细晶高强IF钢热变形行为的析出热力学

材料科学与工程学报, 2014, 32(6): 886-917.

含Nb细晶高强IF钢热变形行为的析出热力学

陈越 ^1, , 张红梅 ^2, , 孙成钱 ^3, , 马多 ^4, , 贾宏斌 ^5, , 郭雅楠 ^6,

1.辽宁科技大学材料与冶金学院,辽宁鞍山 114051

2.辽宁科技大学材料与冶金学院,辽宁鞍山 114051

3.鞍钢股份技术中心,辽宁鞍山 114009

4.辽宁科技大学材料与冶金学院,辽宁鞍山 114051

5.辽宁科技大学材料与冶金学院,辽宁鞍山 114051

6.辽宁科技大学材料与冶金学院,辽宁鞍山 114051

基金项目: 辽宁省教育厅资助项目(LS2010036) 辽宁省自然科学基金资助项目(20102099)

关键词：含Nb细晶高强IF钢 , 碳氮化物 , 析出行为 , 热力学计算

Precipitation Thermodynamics in Nb Contained Fine Grain and High Strength IF Steel during Hot Deformation

Keywords： Nb fine grain and high strength IF steel , carbonitride , precipitation behavior , thermodynamic calculations

以新型含Nb细晶高强IF钢为研究对象,运用规则溶液亚点阵模型计算了实验钢从均热(1523K)冷却至室温(293K)的各个工艺过程中碳氮化物析出相的平衡体积分数、析出相的组成成分、各组元的平衡质量分数.计算结果表明,从均热到冷却至室温(1523K～293K)的过程中,随着温度的降低,固溶于基体中的Nb、C、N元素的质量分数逐渐减小,析出相平衡体积分数先增大后减小,NbN在析出相中比例逐渐降低,NbC在析出相中比例逐渐增加.至室温(293K)时,Nb和N元素几乎全部析出,碳氮化物不再继续析出.

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含Nb细晶高强IF钢热变形行为的析出热力学

Precipitation Thermodynamics in Nb Contained Fine Grain and High Strength IF Steel during Hot Deformation

参考文献