采用弛豫控制析出+加速冷却(RPC+ACC)和超快速冷却+加速冷却(UFC+ACC)2种不同冷却工艺试制低裂纹敏感性钢板,结合显微硬度、SEM及TEM技术分析了冷却工艺对显微组织及力学性能的影响.结果表明:RPC+ACC工艺试样的屈服强度和抗拉强度比UFC+ACC工艺高170MPa和65MPa,而且维持了相同的冲击韧性.获得含有大量位错胞的板条贝氏体组织,且不同尺寸的板条贝氏体被亚结构或位错墙分割,出现相互交错排列是RPC+ACC冷却工艺提高强度的主要机制.
参考文献
| [1] | K. FUJIWARA;S. OKAGUCHI;H. OHTANI .Effect of hot deformation on bainite structure in low carbon steels[J].ISIJ International,1995(8):1006-1012. |
| [2] | Aurelie Lucas;Pierre Simon;Guillaume Bourdon .Metallurgical Aspects of Ultra Fast Cooling in front of the Down-Coiler[J].Steel Research International,2004(2):139-146. |
| [3] | 王学敏,尚成嘉,杨善武,贺信莱.组织细化的控制相变技术机理研究[J].金属学报,2002(06):661-666. |
| [4] | 尚成嘉,王学敏,杨善武,贺信莱,武会宾.高强度低碳贝氏体钢的工艺与组织细化[J].金属学报,2003(10):1019-1024. |
| [5] | Xiao FR;Liao B;Shan YY;Qiao GY;Zhong Y;Zhang CL;Yang K .Challenge of mechanical properties of an acicular ferrite pipeline steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1-2):41-52. |
| [6] | A. B. Cota;R. Barbosa;D. B. Santos .Simulation of the controlled rolling and accelerated cooling of a bainitic steel using torsion testing[J].Journal of Materials Processing Technology,2000(1/3):156-162. |
| [7] | Misra RDK;Nathani H;Hartmann JE;Siciliano F .Microstructural evolution in a new 770 MPa hot rolled Nb-Ti microalloyed steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):339-352. |
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