Effect of TMCP on Microstructure and Mechanical Properties of Low CarbonManganese Steel
LI Long1,DING Hua1,DU Linxiu2,SONG Hongmei3,ZHENG Fang3
1. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China; 2.The State Key Lab. of Rolling and Automation of Northeastern University, Shenyang 110004， Liaoning, China; 3.Baosteel Technology Center, Baoshan Iron & Steel Group Co., Shanghai 201900, China
Abstract：The effects of processing parameters of TMCP, such as finish rolling temperature and coiling temperature on microstructure and mechanical properties of low CMn steel were studied by TMCP tests. The results show that microstructures of strip, rapid cooled after finish rolling at a temperature higher than upper limited temperature of deformation induced ferrite transformation Ad3, is of grain boundary allotriomorphic ferrite/bainite (GBA/B) and the lathshaped bainitic ferrite with good elongation and toughness. The microstructure mainly is of equiaxed ferrite about 8 μm in size with good strength and integrated performance and a certain amount of bainite when the finish rolling temperature was decreased to 800 ℃ (lower than Ad3). Finish rolling temperature and coiling temperature plays an important role in controlling microstructure and grain size for mechanical properties. The compoundstrengthening mechanism including grain refining, bainite transformation and carbide precipitation strengthening could be achieved by reasonable combination of the processing parameters such as finish rolling temperature and coiling temperature for good integrated performance.
李龙;丁桦;杜林秀;宋红梅;郑芳. TMCP对低碳锰钢组织和力学性能的影响[J]. 钢铁, 2006, 41(11): 53-0.
LI Long;DING Hua;DU Linxiu;SONG Hongmei;ZHENG Fang. Effect of TMCP on Microstructure and Mechanical Properties of Low CarbonManganese Steel. Iron and Steel, 2006, 41(11): 53-0.
2006, Vol. 41 
