摘要
对C-Si-Mn冷轧低碳钢进行了淬火与配分(Q&P)处理。利用热膨胀仪、光学显微镜、扫描电镜、电子万能试验机、X射线衍射等实验手段,研究了实验钢奥氏体化温度和奥氏体化保温时间对相变组织的影响,并探讨了显微组织和力学性能随Q&P工艺中配分温度和配分时间等工艺参数的变化规律。结果表明,Q&P配分温度和配分时间强烈影响最终残留奥氏体含量。本实验中最佳配分工艺下,残留奥氏体量(体积分数)可以达到10%以上,从而使试验钢具有良好的强塑积。其伸长率约15.5%,抗拉强度为1352 MPa,强塑积可达到21000 MPa.%以上。
Quenching ＆ partitioning （Q＆P） process was applied to a C-Si-Mn cold-rolled low carbon steel. Influence of austenization temperature and holding time on microstrueture of the steel was investigated, and changes of microstructure and properties with partitioning temperature and partitioning time during Q＆P process were discussed by means of thermal mechanical analyzer （ TMA ）, optical microscopy （ OM ）, scanning electron microscopy （ SEM ）, tensile tests and XRD. The results show that partitioning temperature and partitioning time of Q＆P process have greatly influence on the volume fraction of retained austenite. With the optimal Q＆P process in this work, the volume fraction of retained austenite is up to be more than 10% to ensure the excellent product of strength and elongation of experimental steels. The steel heat-treated by the Q＆P process offers a favorable combination of strength, elongation and toughness, with the corresponding values of about 1352 MPa, 15.5% , and the product of strength and elongation over 21000 MPa＇% , respectively.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第3期104-107,共4页
Transactions of Materials and Heat Treatment
基金
国家科技支撑计划项目(2011BAE13B03)
中央高校基本科研业务费专项资金资助项目(N110402002)
辽宁省自然科学基金项目(201202062)
关键词
Q&P工艺
奥氏体化
残留奥氏体
强塑积
：Quenching ＆ partitioning process
austenization
retained austenite
product of strength and elongation
