Title:
CONTINUOUS CASTING PRODUCTION METHOD FOR SQUARE BILLETS OF VANADIUM-CONTAINING NITROGEN-CONTAINING MICRO-ALLOYED PERITECTIC STEEL
Document Type and Number:
WIPO Patent Application WO/2019/100881
Kind Code:
A1
Abstract:
A continuous casting production method for square billets of vanadium-containing nitrogen-containing micro-alloyed peritectic steel. The vanadium-containing nitrogen-containing micro-alloyed peritectic steel consists of the following components in percentage by weight: C: 0.12-0.18%; Si: 0.2-0.4%; Mn: 1.2-1.5%; V: 0.05-0.10%; N: 0.0060-0.0120%; and the balance being Fe. A continuous casting machine for arc-shaped square billets with sections of 150mm*150mm is adopted to produce, degree of superheat of a tundish ranges from 10-30°C, pull speed of the continuous casting machine is 1.9-2.2 m/min, and soft water flow of a crystallizer is controlled to be 1850+/-50 L/min; secondary-cooling water distribution of the continuous casting machine for arc-shaped square billets with sections of 150mm*150mm is divided into four loops, water volume of the first loop being 75-85 L/min, water volume of the second loop being 60-70 L/min, water volume of the third hoop being 50-60 L/min and water volume of the fourth hoop being 40-50 L/min; secondary-cooling water distribution amount changes along with changes of the pull speed. The continuous casting production method can prevent surfaces of vanadium-containing nitrogen-containing micro-alloyed peritectic steel cast billets from being straightened and cracked.
Inventors:
ZHAO ZHANGFA (CN)
LI YUNHUI (CN)
LI YUNHUI (CN)
Application Number:
PCT/CN2018/110956
Publication Date:
May 31, 2019
Filing Date:
October 19, 2018
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
B22D11/18; B22D11/22; C22C38/12
Foreign References:
| CN107866538A | 2018-04-03 | |||
| CN105908091A | 2016-08-31 | |||
| CN104057051A | 2014-09-24 | |||
| CN101036939A | 2007-09-19 | |||
| CN102363210A | 2012-02-29 | |||
| CN103898413A | 2014-07-02 | |||
| US4494999A | 1985-01-22 |
Attorney, Agent or Firm:
NANJING LI & FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL CENERAL PARTNERSHIP) (CN)
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