1. Metallurgical Engineering Institute, University of Science and Technology Beijing, Beijing 100083, China 2. Research and Development Center, Nanjing Iron and Steel Company Ltd.， Nanjing 210035, Jiangsu, China
Abstract：Using high density laminar cooling device of steckel mill, low carbon Mn-Mo-Nb-Cr-Ni series Q800D/E grade construction machinery steel was produced by direct quenching and off-line tempering technique. The yield strength of the plate was more than 800MPa and the CVN impact energy at - 40℃ was more than 100J after appropriate tempering. During tempering temperature rising, the precipitates in Q800D/E exhibited growing, re-nucleating and coarsing process, which would lead to the fluctuation of the plate strength.
余伟，刘丽华，武会宾，霍松波，洪光涛. 工程机械用钢Q800D/E直接淬火工艺研究及应用[J]. 钢铁, 2011, 46(12): 62-66.
YU Wei1，LIU Li-hua2，WU Hui-bin1，HUO Song-bo2，HONG Guang-tao2. Study and Application on Q800D/E Grade Construction Machinery Steel Produced by Direct Quenching Technique. Iron and Steel, 2011, 46(12): 62-66.
2011, Vol. 46 
