对碳-锰-硅钢进行不同配分温度的Q＆P（Quenching and Partitioning）处理，测试了热处理后不同钢的力学性能和残余奥氏体含量，并用扫描电子显微镜和透射电镜观察其显微组织，分析了配分温度对显微组织和力学性能的影响。结果表明：试验钢显微组织基本由低碳板条状马氏体、块状铁素体和条状残余奥氏体组成；随配分温度的升高，试验钢的抗拉强度呈下降趋势，伸长率与奥氏体含量的变化趋势相同，但变化规律不确定；提高锰含量能稳定残余奥氏体，从而提高试验钢的伸长率，并使伸长率对配分温度不敏感。
The C-Mn-Si steel was quenched and partitioned at different partitioning temperatures, the mechanical properties and residual austenite contents were investigated, the microstructure was observed by SEM and TEM, and the effect of partitioning temperature on microstructure and mechanical properties was analyzed. The results show that the mierostructure of the tested steel consisted of lath martensite with low carbon, nubby ferrite and banded residual austenite. The tensile strength of the tested steel took down trend with the increase o{ the partitioning temperature, and the change trend of elongation and residual austenite content was same, and the variation was uncertain. The increase of manganese content could stabilize residual austenite, and then raise the elongation of the tested steel. And the elongation was not sensitive to partitioning temperature.
参考文献
| [1] | 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. |
| [2] | 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. |
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