为了探索一种800 MPa级冷轧耐侯双相钢的连续冷却转变规律及退火后组织性能变化,利用For-master-FⅡ全自动相交仪及连续退火模拟实验机,进行了连续冷却转变(CCT)曲线的测定及连续退火实验.结果表明:实验钢的过冷奥氏体在很低的冷却速度(0.5℃/s)下即可发生马氏体转变,而珠光体转变较少.当冷速为80℃/s时,仅发生马氏体转变；退火后实验钢显微组织中的马氏体呈带状分布,经最优工艺退火后实验钢的显微组织为多边形铁素体(79％)+块状马氏体(16％)+细小的残余奥氏体(5％),残余奥氏体主要分布于马氏体晶粒内部或铁素体的晶界处；实验钢屈服强度为387 MPa,抗拉强度为863 MPa,延伸率为18％,强塑积达到15534.
参考文献
| [1] | 刘志勇,陈邦文,陈吉清,胡敏,宋育来.武钢铁路车辆及集装箱用耐候钢的现状及发展[J].钢铁研究,2009(06):55-58. |
| [2] | Kamp, A.;Celotto, S.;Hanlon, D.N..Effects of tempering on the mechanical properties of high strength dual-phase steels[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:35-41. |
| [3] | Rocha RO;Melo TMF;Pereloma E;Santos DB .Microstructural evolution at the initial stages of continuous annealing of cold rolled dual-phase steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):296-304. |
| [4] | Chunling Zhang;Dayong Cai;Bo Liao .A study on the dual-phase treatment of weathering steel 09CuPCrNi[J].Materials Letters,2004(9):1524-1529. |
| [5] | 续伟霞,郑为为,石俊亮,孙祖庆,张艳.新型耐候钢连续冷却转变曲线的测定[J].材料热处理学报,2007(05):70-73. |
| [6] | 吴红艳,沈开照,查春和,杜林秀,刘相华,王国栋.耐候钢形变奥氏体的连续冷却转变行为[J].机械工程材料,2007(05):72-75,78. |
| [7] | 金光灿,赵爱民,赵征志,唐荻,刘利,周建.800MPa冷轧热镀锌双相钢组织性能及其织构演变[J].材料工程,2010(09):40-44. |
| [8] | Peranio, N.;Li, Y.J.;Roters, F.;Raabe, D. .Microstructure and texture evolution in dual-phase steels: Competition between recovery, recrystallization, and phase transformation[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(16/17):4161-4168. |
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