Flexible manufacturing technology of controlling exact bake hardening value in continuous galvanizing line

Xiao-fei Zheng, . Yong-lin Kang . Bao-yong Wang . Zhi-gang Han . Xin-long Luo

Journal of Iron and Steel Research International ›› 2018, Vol. 25 ›› Issue (12) : 1296-1302.

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Journal of Iron and Steel Research International ›› 2018, Vol. 25 ›› Issue (12) : 1296-1302.

Flexible manufacturing technology of controlling exact bake hardening value in continuous galvanizing line

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Abstract

Flexible manufacturing technology for ultra-low-carbon bake hardening (BH) steels with different solute carbon contents in the range of (6–16) × 10-4 wt.% was systematically studied. The effects of soaking temperature, cooling rate and aging time on solute carbon content were explored. The bake hardening value in a continuous galvanizing line with an over-aging section was investigated. Optimal manufacturing parameters were calculated using the design of experiment to obtain the best and most flexible process parameters. Results indicate a relationship among carbon content, soaking temperature and cooling rate. When solute carbon is 9 × 10-6, cooling rate is 50 °C/s, the soaking temperature is 745 °C, and BH value is 45 MPa, the requirements of an automobile factory can be met.

Key words

bake hardening (BH) value / solute carbon content / aging time / soaking temperature / cooling rate

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ZHENG Xiao-Fei. Flexible manufacturing technology of controlling exact bake hardening value in continuous galvanizing line[J]. Journal of Iron and Steel Research International, 2018, 25(12): 1296-1302

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References
[1] Chen Jiping, Kang Yonglin, Hao Yingmin. Microstructure and Properties of Ti and Ti+Nb Ultra-Low-Carbon Bake Hardened Steels. Jourmal of Iron and Steel Research, 2009, 16(6): 33-40.
[2] Kozeschnik E, Pletenev V, Zolotorevsky N, et al. Aluminum nitride precipitation and texture development in batch-annealed bake-hardening steel. Metallurgical and Materials Transactions A, 1999, 30(6):1663-1673.
[3] De A K, Blauwe K D, Vandeputte S, et al. Effect of dislocation density on the low temperature aging behavior of an ultra low carbon bake hardening steel. Journal of Alloys & Compounds, 2000, 310(1-2): 405-410.
[4] Jeong W C. Effect of prestrain on aging and bake hardening of cold-rolled, continuously annealed steel sheets. Metallurgical and Materials Transactions A, 1998, 29(2):463-467.
[5] Kuang C F, Zhang S G, Li J, et al. Effect of temper rolling on the bake-hardening behavior of low carbon steel. International Journal of Minerals, Metallurgy, and Materials, 2015, 22(1):32-36.
[6] De A K, Cooman B C D, Vandeputte S. Kinetics of strain aging in bake hardening ultra low carbon steel—a comparison with low carbon steel. Journal of Materials Engineering and Performance, 2001, 10(5):567-575.
[7] Berbenni S, Favier V, Lemoine X, et al. A micromechanical approach to model the bake hardening effect for low carbon steels. Scripta Materialia, 2004, 51(4):303-308.
[8] Hua M, Garcia C I, Deardo A J. Precipitation behavior in ultra-low-carbon steels containing titanium and niobium. Metallurgical and Materials Transactions A, 1997, 28(9):1769-1780.
[9] Taeg-Woo Lee, Sung-Il. Kim, Moon-Hi Hong. Microstructural characterization and thermodynamic analysis of precipitates in ultra-low-carbon bake hardened steel. Journal of Alloys and Compounds,2014,582:428-436.
[10]Hallfeldt T. Possibilities and challenges using advanced high strength steel sheets for automotive applications. International Symposium on Niobium Microalloyed sheet Steels for Automotive Application. TMS,2006.
[11] Baker L J, Daniel S R, Parker J D. Metallurgy and processing of ultralow carbon bake hardening steels. Materials Science and Technology, 2002, 18(4):355-368.
[12] De A K, Blauwe K D, Vandeputte S, et al. Effect of dislocation density on the low temperature aging behavior of an ultra low carbon bake hardening steel. Journal of Alloys & Compounds, 2000, 310(1–2):405-410.
[13] Tikhonovak. Current application and prospects for utilization of steel sheets at JSC AVTOVAZ. International Symposium on Niobium micro alloyed Sheet Steels for Automotive Application. TMS, 2006.
[14] Kang Yonglin. Theory and Technology of Processing and Forming for Advanced Automobile Steel Sheets. Beijing: Metallurgical Industry Press, 2009.
[15] Yong Qi-long. Secondary phases in steels. Beijing: Metallurgical Industry Press, 2006, 158.
[16] Zhao J Z, De A K, De C B C. A Model for the Cottrell Atmosphere Formation During Aging of Ultra Low Carbon Bake Hardening Steels. ISIJ International, 2000, 40(7):725-730.
[17] Palmiere E J, Garcia C I, Ardo A J D. Compositional and microstructural changes which attend reheating and grain coarsening in steels containing niobium. Metallurgical and Materials Transactions A, 1994, 25(2):277-286.
[18] De A K, Vandeputte S, Cooman B C D. Kinetics of low temperature precipitation in a ULC-bake hardening steel. Scripta Materialia, 2001, 44(4):695-700.

Funding

National Natural Science Foundation of China.
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