Abstract：The microstructure of the coarse-grained heat-affected zone (CGHAZ) of 960 MPa high strength steel was simulated by Gleeb-1500D. The relationship between the variation of microstructure and the impact energy was discussed. The results show that lath martensite was mainly generated in the CGHAZ with high cooling rate during the thermal simulation. The impact absorbing energy along with the increase of[θ8/5]firstly increased and then decreased. When[θ8/5]was 20 s， the impact absorbing energy was 149 J with the best， and the main structure was crossed lath martensite with large angle. With the increased cooling rate， the structure transformed to bainite and M-A which had a highly reduced impact property and a obvious softening CGHAZ. The steel is suitable for low heat input to ensure the property of CGHAZ.
收稿日期: 2015-06-08
出版日期: 2016-01-27
引用本文:
刘 政，魏金山，崔 冰，安同邦，田志凌. 热输入对960 MPa级高强钢粗晶区组织及性能的影响[J]. 钢铁, 2016, 51(2): 72-77.
LIU Zheng，WEI Jin-shan，CUI Bing，AN Tong-bang，TIAN Zhi-ling. Influence of heat input on microstructures and mechanical properties of 960 MPa high strength steel coarse-grained zone. Iron and Steel, 2016, 51(2): 72-77.
2016, Vol. 51 
