研究淬火和碳再分配(Q&P)热处理工艺对低碳硅-锰系Q&P钢的显微组织及精细结构的影响,并和常规工艺实验进行对比.通过SEM,TEM分析,经Q&P工艺热处理后的钢板可获得板条马氏体和残余奥氏体两相组织,残余奥氏体呈膜状.利用XRD技术并结合软件编程的手段对残余奥氏体进行了定量分析.采用MTS万能拉伸机测定了其力学性能并进行了断口观察,拉伸试样纤维区为比较典型的韧窝状形貌,体现出良好的韧性断裂特征.结果表明:Q&P工艺处理后的钢板具有高的抗拉强度(1000MPa以上)和良好的塑性,残余奥氏体在组织中起到了相变诱发塑性的作用.
参考文献
| [1] | GERDEMANN F L H;SPEER J G;MATLOCK D K.Microstructure and hardness of steel grade 9260 heat-treated by the Quenching and Partitioning (Q&P) process[A].New Orleans,LA,USA:Association for Iron and Steel Technology,2004:439-449. |
| [2] | Speer JG;Edmonds DV;Rizzo FC;Matlock DK .Partitioning of carbon from supersaturated plates of ferrite, with application to steel processing and fundamentals of the bainite transformation[J].Current opinion in solid state & materials science,2004(3/4):219-237. |
| [3] | David K. Matlock;Volker E. Brautigam;John G. Speer .Application of the Quenching and Partitioning (Q&P) Process to a Medium-Carbon, High-Si Microalloyed Bar Steel[J].Materials Science Forum,2003(Pt.2):1089-1094. |
| [4] | SPEER J G;RIZZO F C;MATLOCK D K et al.The "quenching and partitioning" process:Background and recent progress[J].Materials Research,2005,8(04):417-423. |
| [5] | SPEER J G;STREICHER A M;MATLOCK D K.Quenching and partitioning:a fundamentally new process to create high strength TRIP sheet microstructures[A].Chicago,IL,USA:Minerals Metals and Mater,2003:502-522. |
| [6] | J. Speer;D. K. Matlock;B. C. De Cooman;J. G. Schroth .Carbon partitioning into austenite after martensite transformation[J].Acta materialia,2003(9):2611-2622. |
| [7] | 韦习成,李麟,符仁钰.TRIP钢显微组织与性能关系的评述[J].钢铁研究学报,2001(05):71-76. |
| [8] | 郭峰,李志.断裂韧度与钢组织性能的关系[J].失效分析与预防,2007(04):59-64,54. |
| [9] | M.H.Saleh;R.Priestner .Retained austenite in dual-phase silicon steels and its effect on mechanical properties[J].Journal of Materials Processing Technology,2001(1/3):587-593. |
| [10] | 徐祖耀.马氏体相变与马氏体[M].北京:科学出版社,1980:418-420. |
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