摘要
研究了初始组织状态对27Cr-4Mo-2Ni钢中sigma相析出行为及力学性能的影响。结果表明:固溶态试样经800℃时效处理后sigma相沿chi相在晶界析出以及少量晶内析出,热轧变形及冷轧时效过程产生的亚结构,以及TiN颗粒周围的高应变区域为sigma相析出提供了额外的形核质点,显著加速了sigma相析出,而冷轧变形对sigma相析出的加速作用较热轧变形更加明显。Sigma相析出明显提高试验钢的硬度,但严重恶化其塑性。
Effect of initial microstructure on sigma phase precipitation behavior and mechanical properties of 27 Cr-4 Mo-2 Ni steel was studied. The results show that the sigma phase of the tested steel after solid solution treatment and then aging at 800 ℃ precipitates mainly at grain boundary along the chi phase and a small amount inside grain. The sub-structure produced by hot rolling deformation and cold rolling aging process, and the high strain region around the TiN particles provide additional nucleation particles for sigma phase precipitation, which significantly accelerates the sigma precipitation, however, the acceleration effect of cold rolling deformation on sigma phase precipitation is more obvious than that of hot rolling deformation. The sigma phase precipitation significantly increases the hardness of the tested steel, but seriously deteriorates its plasticity.
作者
孟立鑫
鲁辉虎
李文琪
郭红魁
梁伟
MENG Li-xin;LU Hui-hu;LI Wen-qi;GUO Hong-kui;LIANG Wei(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;School of Mechanical Engineering,North University of China,Taiyuan 030051,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2021年第1期104-109,共6页
Transactions of Materials and Heat Treatment
基金
山西省重点研发计划(201603D421026)
山西省研究生教育创新项目(2019BY043)。
