Effect of coiling and annealing temperatures on yield point behavior of low-carbon steel
作者机构：State Key Laboratory of Advanced Special SteelSchool of Materials Science and EngineeringShanghai UniversityShanghai 200072China Technology Center of Baoshan Iron&Steel Co.Ltd.Shanghai 201900China
出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)
年 卷 期：2020年第27卷第3期
页 面：325-333页
核心收录：
学科分类：08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 0703[理学-化学] 080201[工学-机械制造及其自动化] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学]
基 金：This work was financially supported by the Joint Fund of Iron and Steel Research(No.U1660103) National Natural Science Foundation of China(No.51574162) the National Key R&D Program of China(No.2018YFE0306102) 3DAP measurements were made in the Instrumental Analysis and Research Center at Shanghai University The authors would like to express sincere thanks for their support.
主 题：Low-carbon steel Carbide Yield point elongation Coiling temperature Annealing temperature
摘 要：Low-carbon steel is widely used for household appliance and automotive panel steel because of its excellent plasticity.Unfortunately,yield point phenomena easily appear in the low-carbon steel produced by a continuous annealing process and cause degradation to the surface quality during processing.The effect of the coiling temperature(600-750℃)and annealing temperature(740-820℃)on the yield point behavior is studied.Tensile tests show that coiling temperature has a greater effect on yield point elongation(YPE)and aging index(AI)than the annealing temperature.Microstructure observations show that coiling temperature at 750℃would make the micron-sized carbides appearing at the grain boundary disappear and a number of dispersed nanoscale carbides precipitate in grain interior,corresponding to the highest solid solution carbon content in the matrix of 750℃coiled sample.The experimental results suggest that AI rather than YPE has a positive relationship with the solid solution carbon content of the low-carbon steel.And YPE has a positive relationship with the upper/lower yield strength.
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