基于Clyne-Kurz的微观偏析公式,以物理试验结果为依据,充分考虑固、液相以及夹杂物之间相互作用,建立第3代汽车钢(TG钢)凝固过程微观偏析耦合模型,研究凝固过程钢液中溶质元素和Al2O3等夹杂物分子的质量分数变化特征.结果表明:在整个凝固过程中,Al2O3分子会不断在液相中生成,但生成量比较少,而SiO2和MnO分子不会在液相中生成;铸坯枝晶间不仅有Al2O3夹杂,还有SiO2和其他复合夹杂,凝固前钢水中夹杂物有待进一步去除;凝固末期液相中MnS析出,大大减小了残余液相中S的质量分数变化,但对Mn的质量分数变化没有明显影响;包晶反应温度为1 487℃,包晶反应后凝固的固相中溶质的质量分数明显高于包晶反应前.
参考文献
| [1] | Sato M;Utsumi Y;Watanabe K .Research and development at Kobe Steel on materials and technologies for automobiles[J].Kobelco Technology Review,2008,28(10):13-14. |
| [2] | J. Zrnik;I. Mamuzic;S. V. Dobatkin .Recent Progress in High Strength Low Carbon Steels[J].Metalurgija,2006(4):323-331. |
| [3] | Ohjoon Kwon;Kyooyoung Lee;Gyosung Kim .New Trends in Advanced High Strength Steel Developments For Automotive Application[J].Materials Science Forum,2010(Pt.1):136-141. |
| [4] | Han Dong;Xingjun Sun;Wenquan Cao.On the performance improvement of steels through M3 structure control[J].Advanced Steels:Part 1,2011:35-57. |
| [5] | CAO W Q;Shi J;Wang C.The 3rd generation automobile sheet steels presenting with ultrahigh strength and high ductility[J].Advanced Steels:Part 3,2011:209-227. |
| [6] | Jie Shi;Wenquan Cao;Han Dong.Ultrafine Grained High Strength Low Alloy Steel With High Strength And High Ductility[J].Materials Science Forum,2010:238-241. |
| [7] | C.Y. Wang;J. Shi;W.Q. Cao;H. Dong .Characterization of microstructure obtained by quenching and partitioning process in low alloy martensitic steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(15):3442-3449. |
| [8] | Jie Shi;Xinjun Sun;Maoqiu Wang;Weijun Hui;Han Dong;Wenquan Cao .Enhanced work-hardening behavior and mechanical properties in ultrafine-grained steels with large-fractioned metastable austenite[J].Scripta materialia,2010(8):815-818. |
| [9] | S. K. CHOUDHARY;A. GHOSH .Mathematical Model for Prediction of Composition of Inclusions Formed during Solidification of Liquid Steel[J].ISIJ International,2009(12):1819-1827. |
| [10] | Clyne T W;Kurz W .Solute redistribution during solidification with rapid solid state diffusion[J].Metallurgical Transaction:A,1981,12(06):965-971. |
| [11] | Voller V R;Beckermann C .A unified model of microsegregation and coarsening[J].Metallurgical and Materials Transactions:A,1999,30(08):2183-2189. |
| [12] | YOUNG-MOK WON;BRIAN G. THOMAS .Simple Model of Microsegregation during Solidification of Steels[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2001(7):1755-1767. |
| [13] | Roman Diederichs;Wolfgang Bleck .Modelling of Manganese Sulphide Formation during Solidification, Part I: Description of MnS Formation Parameters[J].Steel Research International,2006(3):202-209. |
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