退火温度对00Cr12TiNb不锈钢组织和性能的影响
ffect of Anneal Temperature on Microstructure and Properties of 00Cr12TiNb Stainless Steel
刘洪军, 刘兆彬, 李亚敏
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作者单位：兰州理工大学 甘肃省有色金属新材料省部共建国家重点实验室, 甘肃 兰州 730050)
中文关键字：00Cr12TiNb不锈钢； 退火温度； 组织； 性能
英文关键字：00Cr12TiNb ferritic stainless steel; annealing temperature; microstructure; mechanical properties
中文摘要：对60%锻造形变量的00Cr12TiNb铁素体不锈钢进行再结晶退火处理，采用金相显微镜、扫描电镜和力学性能测试研究了退火温度对00Cr12TiNb铁素体不锈钢组织和性能的影响。结果表明：00Cr12Ti铁素体不锈钢在920 ℃以下退火处理时主要发生组织的回复和小部分晶粒的再结晶，其屈服强度和硬度随退火温度的上升而下降；在920 ℃以上退火处理时发生再结晶，其屈服强度随退火温度的上升有所增加，硬度则趋于稳定；退火过程中，在晶内和晶界弥散析出了颗粒状NbTi(C，N)；950℃退火时再结晶组织和性能达到最佳。
英文摘要：The influences of annealing temperature on microstructure and mechanical properties of 00Cr12TiNb ferritic stainless steel with 60% deformation were studied by OM, SEM and mechanical testing equipments. The results show that, under the annealing temperature 920 ℃, the dynamic recovery and recrystallization of partial grains primarily occur, the yield strength and hardness decreases with the increase of temperature; above the annealing temperature 920℃, the recrystallization occurs, and with the increase of temperature, the yield strength increases but the hardness is almost constant. The NbTi(C, N) particles are precipitated in ferrite grains and at boundaries during annealing process. The recrystallized microstructure and mechanical properties are optimal when the annealing temperature is 950 ℃.