Title:
DEVICE AND METHOD FOR PRODUCING CARBON-NITROGEN SYNERGISTIC ULTRAHIGH-NITROGEN STEEL BY MEANS OF MULTI-FURNACE PRESSURE CASTING
Document Type and Number:
WIPO Patent Application WO/2024/087545
Kind Code:
A1
Abstract:
A device for producing a carbon-nitrogen synergistic ultrahigh-nitrogen steel by means of multi-furnace pressure casting. The device comprises a pressurizable steel ladle (22), a pressurizable casting chamber (13) located at the bottom of the steel ladle, and a casting mold (14) provided inside the casting chamber. A tap hole at the bottom of the steel ladle is provided with a three-layer slide gate I (9), and a furnace lid II (18) at the top of the casting chamber is provided with a three-layer slide gate II (11); a high-pressure-resistant pipeline I (20) is connected to a lower sliding plate of the three-layer slide gate I, and a high-pressure-resistant pipeline II (19) is connected to an upper sliding plate of the three-layer slide gate II; and the high-pressure-resistant pipeline I and the high-pressure-resistant pipeline II are connected by means of a multi-furnace conversion joint (10). Further provided is a method for producing a carbon-nitrogen synergistic ultrahigh-nitrogen steel by means of multi-furnace pressure casting. By using the device, high-nitrogen alloy homogenization of molten steel is achieved in the pressurizable steel ladle by performing bottom-blowing nitrogen stirring and increasing the nitrogen pressure; and pressurizing solidification is performed in the casting chamber, and the escaping of nitrogen is inhibited. The pressurizable steel ladle and the pressurizable casting chamber are separately designed, and pressurizing casting of different casting materials in multiple furnaces can be achieved by means of multiple pressurizable casting chambers and multi-furnace conversion joints, thereby improving the production efficiency of a special steel type. The cast ultrahigh-nitrogen steel has a high nitrogen content and uniform components, and can satisfy the corrosion-resistant usage requirements in special environments such as train rails, railroad frogs and ocean engineering.
Inventors:
LIU JIMENG (CN)
WANG SHUHUAN (CN)
ZHAO DINGGUO (CN)
SONG QIONG (CN)
ZHANG FUCHENG (CN)
WANG SHUHUAN (CN)
ZHAO DINGGUO (CN)
SONG QIONG (CN)
ZHANG FUCHENG (CN)
Application Number:
PCT/CN2023/089784
Publication Date:
May 02, 2024
Filing Date:
April 21, 2023
Export Citation:
Assignee:
UNIV NORTH CHINA SCIENCE & TECHNOLOGY (CN)
UNIV YANSHAN (CN)
UNIV YANSHAN (CN)
International Classes:
B22D27/13; B22D1/00; B22D41/22
Foreign References:
| CN115592096A | 2023-01-13 | |||
| EP0280765A2 | 1988-09-07 | |||
| CN114367651A | 2022-04-19 | |||
| CN115183579A | 2022-10-14 | |||
| CN1498706A | 2004-05-26 | |||
| JP2000212631A | 2000-08-02 | |||
| JP2014128822A | 2014-07-10 | |||
| US3554268A | 1971-01-12 |
Attorney, Agent or Firm:
MUDA INTELLECTUAL PROPERTY FIRM (CN)
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