研究了铌微合金化试验钢控冷过程空冷弛豫温度对其组织和力学性能的影响,结合金相、电镜观察以及XRD技术分析了弛豫过程铁索体组织的演变、基体中的应变诱导析出行为以及组织中的残余奥氏体量变化.结果表明,轧后采用弛豫+超快冷的控冷工艺可以得到含有铁素体、贝氏体和残余奥氏体的多相组织,弛豫终止温度显著影响铁素体晶粒尺寸、铁素体量以及铁素体基体上的沉淀析出量.随着弛豫终止温度的降低,试验钢的屈服强度和抗拉强度呈降低趋势,而屈强比均保持在0.7左右的较低水平.当弛豫终止温度为720℃时,试验钢的抗拉强度、伸长率和强塑积分别达到820MPa,37.5%和30.750GPa·%的最大值.
参考文献
| [1] | H. J. Koh;S. K. Lee;S. H. Park;S. J. Choi;S. J. Kwon;N. J. Kim .Effect of hot rolling conditions on the microstructure and mechanical properties of Fe-C-Mn-Si multiphase steels[J].Scripta materialia,1998(5):763-768. |
| [2] | Etienne Girauh;Anne Mertens;Pascal Jacques et al.Comparison of the Effects of Silicon and Aluminium on the Tensile Behaviour of Muhiphase TRIP-Assisted Steels[J].Scripta Materialia,2001,44(06):885. |
| [3] | Lee H;Koh HJ;Seo CH;Kim NJ .Microstructure and tensile properties of hot-rolled Fe-C-Mn-Si-Cu multiphase steel[J].Scripta materialia,2008(1):83-86. |
| [4] | Koh-Ichi Sugimoto;Toshiki Muramatsa;Shun-Ichi Hashimoto et al.Formability of Nb Bearing Ultra High-Strength TRIP-Aided Sheet Steels[J].Journal of Materials Processing Technology,2006,177(1-3):309. |
| [5] | Bordignon P;Carneiro T;Duncombe J;等 中信微合金化技术中心.铌科学与技术[M].北京:冶金工业出版社,2001:456. |
| [6] | Sarnek L;Moor E De;Penning J et al.Influence of Alloying Elements on the Kinetics of Strain-Induced Martensitic Nucleation in Low-Alloy,Muhiphase High-Strength Steels[J].Metallurgical and Materials Transactions,2006,37A(01):109. |
| [7] | Dung Woo Sub;Seong Jun Park;Chang Seok Oh .Influence of Partical Replacement of Si by Al on the Change of Phase Fraction During Heat Treatment of TRIP Steels[J].Scripta Materialia,2007,57(12):1097. |
| [8] | D. WU;Z. LI .Effect of thermomechanical controlled processing on the microstructure and mechanical properties of Fe-C-Mn-Si multiphase steels[J].ISIJ International,2006(7):1059-1066. |
| [9] | Imao Tamura;Hiroshi Sekine;Tomo Tanaka.Thermomechanical Processing of High-Strength Low-Alloy Steels[M].London:butterworth,1988:21. |
| [10] | Priestner R;Hodgson P D .Ferrite Grain Coarsening During Transformation of Thermumechanically Processed C-Mn-Nb Austenite[J].Materials Science and Technology,1992,8(10):849. |
| [11] | Bengochea R;López B;Gutierrez I .Microstructural Evolution During the Austenite-to-Ferrite Transformation From Deformed Austenite[J].Metallurgical and Materials Transactions,1998,29A(02):417. |
| [12] | Radko Kaspar;Josef Siegfried Distl;Klaus-Joachim et al.Change in Austenite Grain Structure of Microalloyed Plate Steels Due to Multiple Hot Deformation[J].Steel Researeh International,1998,57(06):271. |
| [13] | 雍歧龙;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,1989:502. |
| [14] | Timokhina I B;Hodgson P D;Pereloma E V .Effect of Deformation Schedule on the Mierostrueture and Mechanical Properties of a Thermomechanically Processed C-Si-Mn Transformation-in Duced Plasticity Steel[J].Metallurgical and Materials Transactions,2003,34A(08):1599. |
| [15] | I.B. Timokhina;P.D. Hodgson;E.V. Pereloma .Effect of Microstructure on the Stability of Retained Austenite in Transformation-Induced-Plasticity Steels[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2004(8):2331-2341. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%