A high-temperature alloy smelting gas element precision control device

Abstract

The utility model discloses a high temperature alloy smelting gas element precision control device belongs to high temperature alloy metallurgical industry field, has solved the difficult of nitrogen increase or oxygen nitrogen hydrogen removal, and the problem that the gas is not easy to precision control is blown into, the utility model discloses a gas source pipe, control valve, sleeve pipe, corundum pipe that connect gradually, be equipped with flowmeter on the sleeve pipe, and the device is stretched into the crucible, and the gas is blown into from the gas source pipe, passes through control valve and flowmeter, realizes precision control gas amount, and the gas is blown inwards.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical industry, specifically relating to a device for precise control of gas elements in high-temperature alloy smelting. Background Technology

[0002] High-temperature alloys are mainly used in critical components of aerospace vehicles, requiring high-quality materials. Vacuum induction melting furnaces are key equipment for smelting high-temperature alloys. Under sealed vacuum conditions, eddy currents are generated during electromagnetic induction, melting the metal. This process can be used to melt high-purity metals and alloys, as well as to produce high-temperature alloys. Because melting under vacuum easily removes nitrogen, hydrogen, and oxygen dissolved in steel and alloys to levels far lower than under atmospheric pressure, controlling the amount of gaseous elements is particularly important in alloy smelting.

[0003] Existing technologies use nitrogen-enhancing agents or deoxidizers in vacuum induction furnaces to increase nitrogen or deoxidize nitrogen and hydrogen. This method makes it difficult to precisely control the required amount of gaseous elements, and leaves residues after high-temperature reaction, which affects the purity of the alloy. Utility Model Content

[0004] The purpose of this invention is to provide a device for precise control of gas elements in high-temperature alloy smelting, aiming to solve the technical problem of difficult gas element control in the high-temperature alloy smelting process mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A high-temperature alloy smelting gas element precision control device includes a gas source pipe, a control valve, a sleeve, and a corundum pipe connected in sequence. The corundum pipe extends into the crucible, the sleeve is connected to the furnace cover, and a flow meter is installed on the sleeve.

[0007] Furthermore, the sleeve and the corundum tube are fixedly connected by threads.

[0008] Furthermore, the sleeve and the furnace cover are connected by a dynamic seal. The dynamic seal is made of an elastic and wear-resistant material and has a sealing function to prevent gas leakage.

[0009] Furthermore, the sleeve is made of nickel-based high-temperature alloy with a nominal diameter of 16-32mm, and can withstand high-temperature baking on the surface of the crucible.

[0010] Furthermore, the corundum tube is made of a high-temperature corrosion resistant material, so that blowing air into the crucible will not cause an increase in refractory slag.

[0011] The beneficial effects of this invention are as follows: This invention can blow gas into the crucible according to different needs, and during the blowing process, the gas volume is precisely controlled by a flow meter and control valve. After blowing, the gas can be extracted at any time without affecting the crucible's rotation and steel pouring. Furthermore, the corundum tube does not cause an increase in refractory slag while gas is introduced. This invention comprehensively solves the problems of difficulty in increasing nitrogen, difficulty in removing nitrogen and hydrogen from oxygen, and difficulty in controlling the amount of gaseous elements, enabling precise control of the gaseous elements in the produced product, and ensuring that the product meets the requirements of high-end applications. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a high-temperature alloy smelting gas element precision control device according to the present invention.

[0013] In the diagram: 1. Furnace cover; 2. Crucible; 3. Sleeve; 4. Dynamic seal; 5. Corundum tube; 6. Flow meter; 7. Control valve; 8. Gas source pipe. Detailed Implementation Plan

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1 As shown, a high-temperature alloy smelting gas element precision control device includes a gas source pipe, a control valve, a sleeve, and an alumina tube connected in sequence. The sleeve is equipped with a flow meter. The alumina tube 5 extends into the crucible 2. The sleeve 3 is connected to the furnace cover 1. The sleeve 3 is equipped with a flow meter 6.

[0016] The sleeve 3 is connected to the furnace cover 1 by a dynamic seal 4, which is made of rubber to ensure that the gas is sealed and will not leak.

[0017] One end of the sleeve 3 is an air inlet, with a flow meter 6 and a control valve 7 on it to ensure the controllability of the gas flow; the other end is an air outlet, with a threaded connection at one end, which is connected to the corundum tube 5. As the sleeve 3 is inserted, the corundum tube 5 moves together and extends into the bottom of the crucible 2 to blow air in.

[0018] During the high-temperature alloy smelting process, after the raw materials are purified, when gas enters from the gas source pipe 8, the control valve 7 is slowly opened. The flow rate is controlled by the flow meter 6 and the control valve 7 to prevent splashing. After refining is completed, the device extends out of the crucible and the control valve 7 is closed.

[0019] Example 1: When smelting NGH957 high-temperature alloy and medical CoCrMo alloy, it is necessary to control the nitrogen content. Nitrogen gas can be introduced to increase the nitrogen content in the molten steel. When smelting high-temperature alloys with low oxygen, nitrogen and hydrogen requirements, argon gas can be introduced into the molten steel. As the argon gas rises and exits in the crucible, it carries away the oxygen, nitrogen and hydrogen in the molten steel, thereby reducing the oxygen, nitrogen and hydrogen content.

Claims

1. A device for precise control of gas elements in high-temperature alloy smelting, characterized in that, It includes a gas source pipe (8), a control valve (7), a sleeve (3), and a corundum pipe (5) connected in sequence. The corundum pipe (5) extends into the crucible (2), the sleeve (3) is connected to the furnace cover (1), and a flow meter (6) is provided on the sleeve (3).

2. The device for precise control of gas elements in high-temperature alloy smelting according to claim 1, characterized in that, The sleeve (3) and the corundum tube (5) are connected by threads.

3. The high-temperature alloy smelting gas element precision control device according to claim 1, characterized in that, The sleeve (3) and the furnace cover (1) are connected by a dynamic seal (4).

4. The high-temperature alloy smelting gas element precision control device according to claim 2, characterized in that, The sleeve (3) is made of nickel-based high-temperature alloy.

5. The high-temperature alloy smelting gas element precision control device according to claim 3, characterized in that, The dynamic seal (4) is made of a material that is elastic and wear-resistant.

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