Abstract：The die casting process is usually adopted to manufacture the steel billet with an overlarge cross sectional area. In 2013, Laisteel implemented an upgrading and renovation project for the special steel. Under this project, 5 machine 5 flow large round billet caster was newly constructed, the cross- sectional area of the round billet was 500, 650 and 800 mm.The production procedure of the 45 steel 800 mm casting billet (w(C)= 0.42%- 0.50%) was 100 t EAFLFVD800 mm large round billet continuous caster. With research and optimization in the aspect of equipment and process, company adopted "three constant" pouring, super weak cold water distribution process, and the optimization of the crystallizer′s electromagnetic stirring parameters in order to improve the core quality of casting billet, then the central shrinkage cavity reached level 0.5, the central porosity reached level 1.0, the central carbon segregation index was less than 1.10. The central crack was eliminated due to the optimization of slow cooling process. The pouring and casting process was protected within the whole procedure in order to reduce the air in the continuous casting process, then the oxygen′s mass fraction in steel was less than 0.001 5%, and the nitrogen′s mass fraction in steel was less than 0.007 0%.
收稿日期: 2017-10-13
出版日期: 2018-05-02
通讯作者:
吴明洋
E-mail: 114381768@qq.com
引用本文:
吴明洋，陈良. 800 mm圆坯连铸机45钢生产工艺优化[J]. 中国冶金, 2018, 28(4): 53-56.
WU Ming- yang，CHEN Liang. Process optimization of 45 steel manufactured by 800 mm round billet caster[J]. China Metallurgy, 2018, 28(4): 53-56.
2018, Vol. 28 
