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A method for effectively cooling titanium ingots

An ingot casting and natural cooling technology, applied in the field of titanium smelting, can solve the problems of long cooling time, increase ingot production cost, affect ingot production efficiency, etc. Effect

Active Publication Date: 2016-08-17
YUNNAN TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This cooling method makes the ingot cool in the crystal pulling chamber for a long time, which affects the production efficiency of the ingot and increases the production cost of the ingot

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] After the titanium ingot smelting and feeding is completed, the ingot is naturally cooled in the melting chamber for 40 minutes, and then the ingot is lowered to the bottom of the crystal pulling chamber, then the isolation valve between the melting chamber and the crystal pulling chamber is closed and the argon gas in the crystal pulling chamber is opened Control valve, when the argon pressure is 200hPa, fill the crystal pulling chamber with argon and cool it for 70 minutes, then open the crystal pulling chamber evacuation valve, let a vacuum pump group separately evacuate the crystal pulling chamber for 25 minutes, then close the evacuation valve to stop the crystal pulling The chamber is evacuated, and then when the argon pressure is 150hPa, the argon control valve of the crystal pulling chamber is opened to fill the ingot with argon for 85 minutes, and the entire cooling process is completed, and then the titanium ingot is taken out of the furnace.

Embodiment 2

[0011] After the titanium ingot smelting and feeding is completed, the ingot is naturally cooled in the melting chamber for 60 minutes, and then the ingot is lowered to the bottom of the crystal pulling chamber, then the isolation valve between the melting chamber and the crystal pulling chamber is closed and the argon gas in the crystal pulling chamber is opened Control valve, when the argon pressure is 150hPa, fill the crystal pulling chamber with argon and cool it for 90 minutes, then open the crystal pulling chamber evacuation valve, let the two vacuum pumps separately evacuate the crystal pulling chamber for 20 minutes, then close the evacuation valve to stop the crystal pulling The chamber is evacuated, and then when the argon pressure is 200hPa, the argon control valve of the crystal pulling chamber is opened to fill the ingot with argon for 90 minutes, and the entire cooling process is completed, and then the titanium ingot is taken out of the furnace.

Embodiment 3

[0013] After the titanium ingot smelting and feeding is completed, the ingot is naturally cooled in the melting chamber for 50 minutes, and then the ingot is lowered to the bottom of the crystal pulling chamber, then the isolation valve between the melting chamber and the crystal pulling chamber is closed and the argon gas in the crystal pulling chamber is opened Control valve, when the argon pressure is 180hPa, fill the crystal pulling chamber with argon and cool it for 60 minutes, then open the crystal pulling chamber evacuation valve, let 2 vacuum pumps separately evacuate the crystal pulling chamber for 30 minutes, then close the evacuation valve to stop the crystal pulling The chamber is evacuated, and then when the argon pressure is 180hPa, the argon control valve of the crystal pulling chamber is opened to fill the ingot with argon for 80 minutes, and the entire cooling process is completed, and then the titanium ingot is taken out of the furnace.

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PUM

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Abstract

A method for effectively cooling titanium ingots. In the present invention, after the smelting and feeding of titanium ingots, the ingots are naturally cooled in the smelting chamber for 40-60 minutes, and then the ingots are lowered to the bottom of the crystal pulling chamber, and the smelting is closed. chamber and the isolation valve of the crystal pulling chamber and open the argon control valve of the crystal pulling chamber. When the argon pressure is 150~200hPa, the crystal pulling chamber is cooled with argon for 60~90min, and then the vacuum valve of the crystal pulling chamber is opened, and the vacuum pump is used to separate the After evacuating the crystal pulling chamber for 20 to 30 minutes, close the evacuation valve to stop the evacuation of the crystal pulling chamber, and then open the argon control valve of the crystal pulling chamber when the argon pressure is 150 to 200 hPa to fill the ingot with argon for 80 to 90 minutes. After the entire cooling process is completed, the titanium ingot is released from the furnace. The beneficial effect of the invention is that, under the condition of ensuring the microstructure and performance of the ingot, the cooling time of the titanium ingot is reduced when the temperature of the ingot is 400-600°C, so that the smelting cycle is shortened, and the use of equipment can be improved. Efficiency, but also improve the production efficiency of ingots, reduce production costs.

Description

Technical field [0001] The invention belongs to a method for more effective cooling of smelted titanium ingots, that is, secondary argon charging cooling, and belongs to the technical field of titanium smelting methods. Background technique [0002] Every time a piece of titanium ingot is smelted, the temperature of the ingot is between 1200 and 1600°C. To make the titanium ingot reach between 400 and 600°C within a certain period of time, the titanium ingot needs to be Necessary measures for cooling, how to choose a good cooling method under the existing equipment technical conditions is particularly important. Choosing a good cooling method will greatly reduce the cooling time, thereby improving production efficiency and reducing production costs. Guarantee. [0003] The traditional cooling method of smelting titanium ingots usually adopts "one-time argon cooling". That is, after the ingot smelting and feeding, the ingot is cooled in the melting chamber for 60 minutes, after 60...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D7/12
Inventor 曾益平徐勇智胡晓晨晁建波谷俊
Owner YUNNAN TITANIUM IND