Degassing device for metal melt and using method of degassing device

By introducing a negative pressure furnace and air blowing port into the vacuum degassing device, the problem that the vacuum degassing method is difficult to remove hydrogen deep in the metal melt is solved, and an efficient multi-stage degassing process is achieved, which improves the quality of the casting billet.

CN119702979AInactive Publication Date: 2025-03-28ORDOS VOCATIONAL COLLEGE
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Patent Information

Application Number
CN202411898945.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2025-03-28
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing vacuum degassing method is difficult to remove hydrogen in the deep metal melt, resulting in pore defects in the casting blank and reducing the performance of the metal casting blank.

Method used

A degassing device including a vacuum furnace and a negative pressure furnace is designed. The two are connected through a flow channel, and the metal melt in the vacuum furnace is drawn into the negative pressure furnace for secondary vacuum degassing. An air blowing port is set up at the bottom of the negative pressure furnace to blow inert gas to further remove residual gas.

Benefits of technology

It realizes efficient removal of gases in the depth of the metal melt, significantly reduces the gas content of the casting blank, and improves the quality and performance of the metal casting blank.

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Abstract

The invention belongs to the technical field of metal casting application, and particularly relates to a degassing device for metal melt and a using method of the degassing device. Comprising a vacuum furnace and a vacuum exhaust pipe arranged at the top of the vacuum furnace, the end, away from the vacuum furnace, of the vacuum exhaust pipe is communicated with a vacuum pump, a negative pressure furnace is arranged on one side of the vacuum furnace, a negative pressure exhaust pipe is arranged at the top of the negative pressure furnace, and the end, away from the negative pressure furnace, of the negative pressure exhaust pipe is communicated with a negative pressure pump. A launder is arranged between the vacuum furnace and the negative pressure furnace, the bottoms of the vacuum furnace and the negative pressure furnace are communicated through the launder, and a launder switch is arranged on the launder. According to the device, the vacuum furnace and the negative pressure furnace are connected in an underflow mode through the launder, the metal melt in the vacuum furnace is pumped into the negative pressure furnace through pressure difference, the metal melt at the bottom in the vacuum furnace preferentially enters the negative pressure furnace, and the metal melt at the bottom in the vacuum furnace enters the upper portion in the negative pressure furnace; the problem that gas in a certain metal melt depth is difficult to remove through a vacuum degassing method is solved.
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