Effects of Manganese Content and Finishing Rolling Temperature on the Microstructure and Mechanical Properties of Low Cost Middle Titanium Q345B Steel
YANG Cai-shui1, LUO Xu1,2, LI Jun-hong2, KANG Yong-lin1
(1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083,China 2. Panzhihua Iron and Steel Research Institute, Panzhihua 617000, Sichuan, China)
Abstract:Influences of different manganese content (0.6%-1.0%) and finishing rolling temperature on the microstructure and mechanical properties of low cost middle titanium (0.04%-0.05%) Q345B Steels were studied by laboratory rolling experiments, combining TEM observing the rule of Ti precipitation in the steel. The results indicate that when the manganese content was 0.8% and the finish rolling temperature was 850 ℃, the yield strength of the experimental steel was 491 MPa, the tensile strength was 625 MPa and the elongation was 33.6%. It can reduce the cost to maximum under the condition of meeting mechanical properties. The precipitation of Ti is mainly spherical nanometer size TiC particles, with a small amount of square large TiN particles.
杨财水, 罗 许 , 李俊洪, 康永林. 锰含量和终轧温度对低成本中钛Q345B钢组织性能的影响[J]. 钢铁, 2014, 49(11): 59-63.
YANG Cai-shui, LUO Xu, LI Jun-hong, KANG Yong-lin. Effects of Manganese Content and Finishing Rolling Temperature on the Microstructure and Mechanical Properties of Low Cost Middle Titanium Q345B Steel. Iron and Steel, 2014, 49(11): 59-63.
LI L, DING H, DU L, et al.Influence of Mn content and hot deformation on transformation behavior of C-Mn steels[J].Journal of Iron and Steel Research, International, 2008, 15(2):51-55
[3]
LI L, DING H, DU L, et al.Influence of Mn content and hot deformation on transformation behavior of C-Mn steels[J].Journal of Iron and Steel Research, International, 2008, 15(2):51-55
[4]
Byun J S, Shim J H, Cho Y W.Influence of Mn on microstructural evolution in Ti-killed C–Mn steel[J].Scripta Materialia, 2003, 48(4):449-454
[4]
Byun J S, Shim J H, Cho Y W.Influence of Mn on microstructural evolution in Ti-killed C–Mn steel[J].Scripta Materialia, 2003, 48(4):449-454