摘要
利用热膨胀仪、SEM和TEM等设备和技术,对经过不同Q＆P工艺处理的低碳高硅中锰钢（w（Mn）=7.6%）的组织和性能进行研究。结果表明,与在奥氏体化相区退火（800℃）的Q＆P工艺相比,在两相区退火（630～660℃）的Q＆P工艺能够获得更好的组织和力学性能;当退火温度为640℃时,能够获得最佳的延伸率和强塑积,强塑积最高可达到40GPa%。奥氏体化相区退火后的组织主要是马氏体和残余奥氏体,两相区退火后的组织主要是铁素体和残余奥氏体,室温下存在的亚稳态奥氏体所产生的TRIP效应能够有效提高材料的塑性。
Microstructure and performance of cold-rolled low carbon medium manganese steel plate with different Q＆P process are studied by means of SEM, TEM, etc. The results show that comparing with the Q＆P process（800 ℃） of aus- tenitic phase annealing, the Q＆P process（630～660 ℃） with intereritical annealing is better for steel microstructure and performance. The elongation will be best when the Q＆p process with annealing temperature of 640 ℃. The steel micro- structure will be martensite and retained austenite which is treated by austenitic phase annealing. However, after intercriti- cal annealing, the major microstructure will be ferrite and retained austenite. The retained austenite which is existed in room temperature can effectively improve the plasticity by TRIP effect. effect, retained austenite
出处
《新技术新工艺》
2015年第9期74-77,共4页
New Technology & New Process
