Effects of recrystallization annealing temperature on carbide precipitation, microstructure, and mechanical properties in Fe-18Mn-0.6C-1.5Al TWIP steel
Effects of recrystallization annealing temperature on carbide precipitation, microstructure, and mechanical properties in Fe-18Mn-0.6C-1.5Al TWIP steel
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DOI：
10.1016/j.msea.2009.08.048
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发表时间：
2010-01-15
期刊：
影响因子：
6.4
通讯作者：
Lee, Young-Kook
中科院分区：
文献类型：
--
作者：
Kang, Singon;Jung, Yeon-Seung;Lee, Young-Kook
研究了冷轧 Fe-18Mn-0.6C-1.5Al TWIP 钢的显微组织、韧窝结构和机械性能随退火温度的变化。再结晶在600℃开始，在700℃结束，保持时间10分钟。在840℃左右，再结晶晶粒的粗化率增加，洛氏硬度在800～900℃之间大大降低，这与M3C碳化物的平衡溶解温度有很好的一致性。由于碳化物沉淀硬化，抗拉强度的回复发生在 700 至 800 摄氏度之间。通过膨胀测试生成析出-时间-温度图，显示鼻部温度为800℃。韧窝尺寸减小到700℃，然后随着退火温度的升高再次增大，与奥氏体晶粒尺寸具有很强的比例关系。 (c) 2009 Elsevier B.V. 保留所有权利。
The microstructure, dimple structure, and mechanical properties of a cold-rolled Fe-18Mn-0.6C-1.5Al TWIP steel were investigated as a function of annealing temperature. The recrystallization started at 600 degrees C and finished at 700 degrees C for the holding time of 10 min. The coarsening rate of recrystallized grains was increased over about 840 degrees C and Rockwell hardness was greatly decreased between 800 and 900 degrees C, which shows a good agreement with the equilibrium dissolution temperature of M3C carbides. The reversion of the tensile strength occurred between 700 and 800 degrees C because of the carbide precipitation hardening. The precipitation-time-temperature diagram was generated by dilatometric tests, showing a nose temperature of 800 degrees C. The dimple size was decreased to 700 degrees C and then increased again with higher annealing temperature, having a strong proportional relationship with austenite grain size. (c) 2009 Elsevier B.V. All rights reserved.