Abstract:In present work,the continuous casting(CC)production of high manganese steel 20Mn23AlV in the TISCO and the slab surface cracks of the 20Mn23AlV were investigated. By means of industrial samples and the slag-metal reaction experiment,the characteristics and forming process of slab surface crack were systematically studied through the metallographic microscope,the scanning electron microscopy and the energy spectrum analysis. While the variation of indexes such as the chemical compositions before and after mold fluxes were used,melting point,viscosity,heat transfer and so on were studied. The results showed that the SiO2 in mold fluxes was deoxidized by the Al in the molten steel,leading to changes of the mold fluxes composition during the continuous casting process,and properties of the lubrication and the heat transfer for mold fluxes also changed,which could increase slab surface cracks of high manganese steel 20Mn23AlV. Therefore,during CC production of the steel with strong reducibility element(Al),low SiO2 content mold fluxes should be used in order to reduce slab surface cracks,improve the surface quality of slab and ensure CC production of high manganese steel smoothly.
收稿日期: 2017-05-12
出版日期: 2017-09-07
引用本文:
李建民,,姜茂发,. 连铸保护渣对20Mn23AlV铸坯表面微裂纹的影响[J]. 钢铁, 2017, 52(9): 48-53.
LI Jian-min,,,JIANG Mao-fa,. Effect of mold fluxes on slab surface crack for 20Mn23AlV. Iron and Steel, 2017, 52(9): 48-53.
Zhang Z T, Wen G H, Tang P, et a1. The Influence of A12O3/SiO2 Ratio on the Viscosity of Mold Fluxes[J]. ISIJ International, 2008, 48(6): 739-746.
[7]
Zhang Z T, Wen G H, Tang P, et a1. The Influence of A12O3/SiO2 Ratio on the Viscosity of Mold Fluxes[J]. ISIJ International, 2008, 48(6): 739-746.
[8]
Becker J J, Madden A M. Natarajan T T, et a1. Liquid/Solid Interactions during Continuous Casting of High-A1 Advanced High-Strength Steels[C]//AISTech 2005: Proceedings of the Iron and Steel Technology Conference Vol 2, May 9-12, 2005 Charlotte, Pittsburgh: AIST, 2005: 99-106.
[8]
Becker J J, Madden A M. Natarajan T T, et a1. Liquid/Solid Interactions during Continuous Casting of High-A1 Advanced High-Strength Steels[C]//AISTech 2005: Proceedings of the Iron and Steel Technology Conference Vol 2, May 9-12, 2005 Charlotte, Pittsburgh: AIST, 2005: 99-106.
[9]
Zhou L J, Wang W L, Ma F J, et a1. A Kinetic Study of the Effect of Basicity on the Mold Fluxes Crystallization[J]. Metallurgical and Material Transactions B, 2012, 43(2): 354-362.
[9]
Zhou L J, Wang W L, Ma F J, et a1. A Kinetic Study of the Effect of Basicity on the Mold Fluxes Crystallization[J]. Metallurgical and Material Transactions B, 2012, 43(2): 354-362.
[10]
Zhu C Y, Han W D, Liu C J, et a1. Crystallization Temperature and Crystallization Ratio of Mold Flux[J]. Journa1 of Iron & Steel International, 2005, 12(6): 23-26.
[10]
Zhu C Y, Han W D, Liu C J, et a1. Crystallization Temperature and Crystallization Ratio of Mold Flux[J]. Journa1 of Iron & Steel International, 2005, 12(6): 23-26.