Effect of Zirconium Addition on the Characterization of γ-α Phase Transformation during Continuous Cooling in Low Carbon Steel
To reveal the function of zirconium addition on the characterization of microstructure transformation behavior in low carbon steel,the Zr-added steels and Zr-free steel were refined with vacuum induction furnace.The relationship between zirconium addition and the decomposition products of austenite during continuous cooling rate from 0.1℃/s to 30℃/s has been systematically investigated by a Gleeble-3800 thermal simulator.To further verify the effect of zirconium on the phase transformation,the microstructure characteristics of hot-rolled samples under a special Thermo-mechanical Control Processing(TMCP)process were also observed.The results reveal that zirconium can affect the starting temperatures of the austenitic decomposition and the pearlite transformation.The addition of zirconium has a significant effect in promoting the transformation of proeutectoid ferrite,and the bainite transformation is not well developed,but a suppression of the transformation is emerged.The result of the present study implies that a high cooling rate,such as above 20℃/s,should be controlled during continuous cooling to obtain bainitic structure for the Zr-containing low carbon steel.
ship-building plates zirconium continuous cooling transformation (CCT) diagram proeutectoid ferrite
Xiaobing LI Yi MIN Chengjun LIU Bo WANG Maofa JIANG
Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),School of M The Steel of Plant of Laiwu Iron and Steel Group Co.,Ltd.,Laiwu 271104,Shandong,China
国际会议
the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)
北京
英文
641-644
2015-05-12（万方平台首次上网日期，不代表论文的发表时间）