A kind of cooling method of titanium alloy ingot

A cooling method and titanium alloy technology, which is applied in the field of cooling titanium alloy ingots, can solve the problems of low cooling efficiency, high production cost, and difficulty in controlling the oxidation of the ingot head

Active Publication Date: 2021-07-09
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a cooling method for titanium alloy ingots, which solves the problems of low cooling efficiency, high production cost and difficulty in controlling the oxidation of the ingot head in the existing specifications of titanium alloy ingots.

Method used

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  • A kind of cooling method of titanium alloy ingot
  • A kind of cooling method of titanium alloy ingot

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1. Connect the argon gas bottle with the argon-filled cooling pipe before arcing and smelting the ingot with a specification of Φ560mm and a feeding capacity of 1800kg to ensure that the argon gas purity inside the argon gas bottle is not lower than 99.99%, and the air pressure is not lower than 1MPa. And ensure that there is no leakage point at the pipe connection, close the flow control valve of the argon gas cylinder, open the vacuum system valve of the vacuum consumable electric arc furnace, adjust the vacuum pressure in the vacuum consumable electric arc furnace to ≤2.0Pa, and the leak rate to ≤1.0Pa / min After that, turn on the circulating cooling water and start the arc to melt the ingot;

[0024] Step 2. After the ingot is smelted and tripped, adjust the inlet water temperature of the melting station to 30°C and the outlet water temperature to 40°C to ensure that the cooling water flow is at 1000L / min, and keep the vacuum system open to maintain the vacuum se...

Embodiment 2

[0034] Step 1. Connect the argon gas bottle with the argon-filled cooling pipe before arcing and smelting the ingot with a specification of Φ560mm and a feeding capacity of 1800kg to ensure that the argon gas purity inside the argon gas bottle is not lower than 99.99%, and the air pressure is not lower than 2.5MPa , and ensure that there are no leaks at the pipeline connection, close the flow control valve of the argon gas cylinder, open the vacuum system valve of the vacuum consumable electric arc furnace, adjust the vacuum pressure in the vacuum consumable electric arc furnace to ≤2.0Pa, and the leak rate to ≤1.0Pa / After min, turn on the circulating cooling water, and start the arc to melt the ingot;

[0035] Step 2. After the ingot is smelted and tripped, adjust the inlet water temperature of the melting station to 30°C and the outlet water temperature to 40°C to ensure that the cooling water flow rate is at 1500L / min, and keep the vacuum system open to maintain the vacuum ...

Embodiment 3

[0044] Step 1. Connect the argon gas bottle with the argon-filled cooling pipe before arcing and smelting the ingot with a specification of Φ720mm and a feeding capacity of 5200kg, so as to ensure that the argon gas purity inside the argon gas bottle is not lower than 99.99%, and the air pressure is not lower than 2.5MPa , and ensure that there are no leaks at the pipeline connection, close the flow control valve of the argon gas cylinder, open the vacuum system valve of the vacuum consumable electric arc furnace, adjust the vacuum pressure in the vacuum consumable electric arc furnace to ≤2.0Pa, and the leak rate to ≤1.0Pa / After min, turn on the circulating cooling water, and start the arc to melt the ingot;

[0045] Step 2. After the ingot is smelted and tripped, adjust the inlet water temperature of the melting station to 30°C and the outlet water temperature to 40°C to ensure that the cooling water flow rate is at 1800L / min, and keep the vacuum system open to maintain the ...

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Abstract

The invention discloses a cooling method for titanium alloy ingots. The specific process is as follows: placing the ingots in a vacuum consumable electric arc furnace and sealing the furnace, connecting an argon gas bottle with the furnace chamber of the vacuum consumable electric arc furnace, Close the valve, open the vacuum system valve of the vacuum consumable electric arc furnace, evacuate the vacuum consumable electric arc furnace, open the circulating cooling water and start the arc to melt the ingot; after the ingot smelting is completed and trips, maintain the vacuum consumable arc The pressure in the furnace is not higher than 5Pa, adjust the temperature and flow rate of the circulating cooling water to cool the ingot, cool for 30-60min, close the valve of the vacuum system and open the argon flow control valve, and fill the argon gas into the vacuum consumable electric arc furnace , when the argon pressure of the vacuum consumable electric arc furnace reaches 10000-80000Pa, stop filling the argon gas; after the ingot is cooled for 3-5h, the cooled titanium alloy ingot is obtained; the cooling efficiency of the existing specification titanium alloy ingot is solved Low, high production costs, and difficult head oxidation control.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing technology, and in particular relates to a cooling method for titanium alloy ingots. Background technique [0002] Due to its low density, high strength, good corrosion resistance, excellent biocompatibility and other characteristics, titanium alloy has been widely used in aerospace, electric power, shipbuilding, marine engineering, chemical industry, biomedical, metallurgy, sports equipment and other fields Therefore, the effective control of the quality of titanium alloy ingots is the basis for realizing the above applications. Therefore, the melting and solidification cooling process of titanium alloy ingots is particularly important. Conventional titanium alloy ingots are cooled by circulating water outside the crystallizer for heat exchange cooling, and the production efficiency is low. For 560mm ingots, the cooling time is often close to 4h, and for 640mm ingots, it often...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/20B22D21/00B22D30/00
CPCB22D21/005B22D30/00C22B9/20
Inventor 华正利罗文忠吴明王凯旋刘向宏冯勇
Owner 西部超导材料科技股份有限公司
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