在Thermecmastor-Z型热模拟试验机上对20MnSiNb和20MnSi钢进行了单向压缩试验,用热膨胀技术结合组织观察的方法,建立了它们的静态和动态的连续冷却转变曲线,研究了在连续冷却过程中冷却速率、铌及形变对钢γ→α相变过程的影响规律.结果表明:随着冷却速率的增加,铁素体转变开始温度降低,铁素体晶粒得到细化;20MnSiNb钢中析出的Nb(C,N)促进了γ→α相变,并使铁素体晶粒进一步得到细化;形变对铁素体相变也有促进作用.
参考文献
| [1] | 雍岐龙;马鸣图;吴宝榕.微合金钢--物理和力学冶金[M].北京:机械工业出版社,1989 |
| [2] | Khlestov V M;Konopleva E V;Mcqueen H J .Kinetics of austenite transformation during thermomechanical processes[J].Canadian Metallurgical Quarterly,1998,37(02):75-88. |
| [3] | Feng H S;Yang J B;Yang Z G et al.The mechanism of bainite transformation in steel[J].Scripta Materialia,2002,47(02):157-162. |
| [4] | Lawrynowicz Z .Transformation from upper to lower bainite in Fe-C-Cr steel[J].Materials Science and Technology,2004,20(11):1447-1454. |
| [5] | Cota A B;Modenesi P J;Barbosa R et al.Determination of CCT diagrams by thermal analysis of an HSLA bainitic steel submitted to thermomechanical treatment[J].Scripta Materialia,1999,40(02):165-169. |
| [6] | Manohar P A;Chandra T;Killmore C R .Continuous cooling transformation behaviour of microalloyed steel containing Ti,Nb,Mn,Mo[J].,1996,36(12):1486-1493. |
| [7] | 张迎晖,康永林,于浩,刘晓,方圆.C-Si-Mn系TRIP钢连续冷却过程相变研究[J].机械工程材料,2005(12):4-6,37. |
| [8] | 虞毅,高惠临,霍春勇,刘迎来.X70管线钢管件制造热过程中的形变规律[J].机械工程材料,2006(05):17-19,55. |
| [9] | Gomez M;Medina S F;Caruana G .Modeling of phase transformation kinetics by correction of dilatometry results for a ferritic Nb-microalloyed steel[J].ISIJ International,2003,43(08):1228-1237. |
| [10] | Abe T;Tsukada K;Kozasu I.[A].,1985 |
| [11] | 翁宇庆.超细晶钢--钢的组织细化理论与控制技术[M].北京:冶金工业出版社,2003 |
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