Multi-atmosphere nitrogen carbon tube furnace

Abstract

The utility model belongs to the technical field of titanium carbonitride material production, and particularly relates to a multi-atmosphere nitrogen carbon tube furnace which comprises a carbon tube furnace main body, a carbon tube is arranged in a furnace body of the carbon tube furnace main body, the furnace tail end of the carbon tube furnace main body is communicated with a first air inlet pipe, and the furnace head end of the carbon tube furnace main body is communicated with a first air outlet pipe. A second air inlet pipe and a second air outlet pipe which are arranged in a staggered mode are communicated with the interior of a furnace body of the carbon tube furnace body, and the furnace body of the carbon tube furnace body is further filled with carbon black wrapping carbon tubes. According to the utility model, nitrogen is introduced into the gas inlet pipe I arranged on the carbon tube furnace main body, and hydrogen is introduced as a protective gas to prevent carbon black from being oxidized at high temperature, so that a general carbon tube furnace is used for replacing a molybdenum wire furnace to produce titanium carbonitride materials.

Description

Technical Field

[0001] The utility model belongs to the technical field of titanium carbonitride material production, and particularly relates to a multi-atmosphere nitrogen-carbon tube furnace. Background Technique

[0002] In the manufacturing of various mechanical parts, tools are required for processing. The cutting performance of tool materials is one of the key factors determining processing efficiency, processing quality, and processing cost. WC-Co-based cemented carbide tools are the most commonly used tool materials at present. However, tungsten and cobalt are rare resources, resulting in a relatively high cost of WC-Co-based cemented carbide materials.

[0003] Titanium carbonitride materials have excellent properties such as high melting point, high strength, strong wear resistance, corrosion resistance, and oxidation resistance. It combines the advantages of TiC and TiN. In addition to being very suitable for high-precision machining and near-net shaping machining, on the basis of maintaining the characteristics of TiC, due to the introduction of N, the brittle characteristics of TiC are significantly improved. As the N content increases, its hardness decreases and toughness increases. Due to its excellent comprehensive performance, titanium carbonitride-based ceramics have been widely used in the fields of cutting, high-temperature resistant materials, measuring tools, petroleum and chemical industries, watch appearances, etc.

[0004] At present, a molybdenum wire furnace is often used to produce titanium carbonitride materials, such as a molybdenum wire furnace with the publication number CN215930565U. The technical problem to be solved by the utility model is to provide a molybdenum wire furnace with automatic feeding. The technical solution adopted by the utility model: includes a molybdenum wire furnace body and a molybdenum wire furnace base. The molybdenum wire furnace body includes a furnace body, a preheating pipeline device, and a cooling pipeline device, and also includes a feeding device and a control electrical cabinet. The feeding device includes a fixed support assembly, a screw motor device, a track seat assembly, a push block, and a proximity switch. The track seat assembly includes a track seat and a transition block. The track seat includes a guide rail seat body and a first stop block. A push block positioning groove is provided on the guide rail seat body, a first proximity switch mounting hole is provided on the first stop block, and a transition block positioning protrusion is provided at the front end of the guide rail seat body. The advantages of the utility model are: the feeding device replaces the manual pushing working mode, with high working efficiency, high accuracy, and improved safety performance.

[0005] However, the overall equipment of this molybdenum wire furnace is relatively large and the cost is relatively high. Therefore, it is an urgent problem to be solved to design an alternative to the molybdenum wire furnace for producing titanium carbonitride materials.

[0006] In view of this, the utility model provides a multi-atmosphere nitrogen-carbon tube furnace to meet the requirements. Utility Model Content

[0007] The purpose of the utility model is to provide a multi-atmosphere nitrogen-carbon tube furnace, aiming to solve the problem of replacing the molybdenum wire furnace to produce titanium carbonitride materials.

[0008] To achieve the above object, the present utility model provides the following technical solution: A multi-atmosphere nitrogen-carbon tube furnace, including a carbon tube furnace main body, a carbon tube is provided inside the furnace body of the carbon tube furnace main body, an air inlet pipe 1 is connected to the furnace tail end of the carbon tube furnace main body, an air outlet pipe 1 is connected to the furnace head end of the carbon tube furnace main body, air inlet pipes 2 and air outlet pipes 2 arranged in an alternating manner are connected inside the furnace body of the carbon tube furnace main body, and carbon black wrapping the carbon tube is also filled inside the furnace body of the carbon tube furnace main body.

[0009] Preferably, as a multi-atmosphere nitrogen-carbon tube furnace of the present utility model, the air inlet pipe 1 is a three-way pipe.

[0010] Preferably, as a multi-atmosphere nitrogen-carbon tube furnace of the present utility model, water jackets are provided outside both the furnace body and the furnace tail of the carbon tube furnace main body.

[0011] Preferably, as a multi-atmosphere nitrogen-carbon tube furnace of the present utility model, a connecting pipe is connected between the water jackets provided outside the furnace body and the furnace tail of the carbon tube furnace main body.

[0012] Preferably, as a multi-atmosphere nitrogen-carbon tube furnace of the present utility model, a water inlet pipe is connected to the water jacket outside the furnace tail of the carbon tube furnace main body.

[0013] Preferably, as a multi-atmosphere nitrogen-carbon tube furnace of the present utility model, a water outlet pipe is connected to the water jacket outside the furnace body of the carbon tube furnace main body.

[0014] Preferably, as a multi-atmosphere nitrogen-carbon tube furnace of the present utility model, flow-blocking sheets arranged in an alternating manner are provided inside the water jacket.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] By introducing nitrogen into the air inlet pipe 1 provided on the carbon tube furnace main body and introducing hydrogen as a protective gas to prevent carbon black from oxidizing at high temperatures, the present utility model realizes using a general carbon tube furnace to replace a molybdenum wire furnace to produce titanium carbonitride materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 is a three-dimensional sectional structural schematic diagram of the present utility model;

[0020] Figure 3 is a schematic diagram of the internal front view structure of the present utility model.

[0021] In the figure: 1 is the main body of the carbon tube furnace; 2 is the water jacket; 3 is the water inlet pipe; 4 is the connecting pipe; 5 is the first inlet gas pipe; 7 is the second inlet gas pipe; 8 is the second outlet gas pipe; 9 is the water outlet pipe; 10 is the first outlet gas pipe; 11 is carbon black; 12 is the carbon tube. Specific implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1-3 , the present invention provides the following technical solutions: A multi-atmosphere nitrogen-carbon tube furnace includes a carbon tube furnace main body 1. The carbon tube furnace main body 1 is composed of a furnace body, a furnace head and a furnace tail. A carbon tube 12 is arranged in the furnace body of the carbon tube furnace main body 1. After the carbon tube 12 is connected to the power supply, it can generate heat. The carbon tube 12 communicates with the furnace head and the furnace tail. The tail end of the carbon tube furnace main body 1 is connected to a first inlet gas pipe 5. The first inlet gas pipe 5 is a three-way pipe, and its two passages are respectively connected to a nitrogen source and a hydrogen source through valves for introducing nitrogen and hydrogen into the carbon tube 12. The head end of the carbon tube furnace main body 1 is connected to a first outlet gas pipe 10. The first outlet gas pipe 10 is connected to a gas collection device for discharging nitrogen and hydrogen. An inlet gas pipe 7 and an outlet gas pipe 8 are communicated in the furnace body of the carbon tube furnace main body 1. The inlet gas pipe 7 and the outlet gas pipe 8 are arranged in a staggered manner up and down. The inlet gas pipe 7 is connected to a hydrogen source to fill hydrogen into the furnace body to prevent the carbon black 11 in the furnace body from being oxidized under the influence of high temperature. The outlet gas pipe 8 is connected to a gas collection device. Carbon black 11 that wraps the carbon tube 12 is also filled in the furnace body of the carbon tube furnace main body 1. The carbon black 11 can assist in realizing heat radiation to efficiently maintain the temperature in the furnace body and reduce energy consumption;

[0024] During specific use: Using TiN powder and C powder as raw materials, feeding them into the carbon tube 12 from the furnace head or the furnace tail, sealing the furnace head and the furnace tail with a furnace cover, energizing the carbon tube 12 to make it heat up, realizing heat diffusion and heat preservation through the carbon black 11, and at the same time connecting the two passages of the first inlet gas pipe 5 to a nitrogen source and a hydrogen source to introduce nitrogen and hydrogen gas flows into the carbon tube 12. The purpose of introducing hydrogen is to prevent the C powder from being oxidized by heat and discharging it from the first outlet gas pipe 10. The TiN powder and C powder are subjected to carbonitriding treatment under the action of high temperature and nitrogen gas flow to obtain Ti(C, N) powder, that is, titanium carbonitride powder.

[0025] Furthermore, in order to achieve rapid cooling when the carbon tube furnace main body 1 stops working, a water jacket 2 can be arranged outside the furnace body and the furnace tail of the carbon tube furnace main body 1, and the water jackets 2 outside the furnace body and the furnace tail are connected through a connecting pipe 4. At the same time, a water inlet pipe 3 is communicated with the water jacket 2 outside the furnace tail of the carbon tube furnace main body 1, and a water outlet pipe 9 is communicated with the water jacket 2 outside the furnace body of the carbon tube furnace main body 1;

[0026] During specific use, water is introduced from the water inlet pipe 3, pumped into the water inlet pipe 3, and flows into the water jacket 2 outside the furnace head. At the same time, it flows into the water jacket 2 on the furnace body through the connecting pipe 4, and then is discharged through the water outlet pipe 9. The water flowing into the water jacket 2 exchanges heat with the carbon tube furnace main body 1, thereby achieving rapid cooling of the carbon tube furnace main body 1;

[0027] Furthermore, in order to improve the heat exchange efficiency between the water in the water jacket 2 and the carbon tube furnace main body 1, flow blocking pieces arranged in a staggered manner can be set in the water jacket 2 or a threaded channel can be set in the water jacket 2, so as to slow down the flow rate of the water in the water jacket 2, enable sufficient heat exchange between the water flow and the carbon tube furnace main body 1, further accelerate the cooling of the carbon tube furnace main body 1, prevent scalding caused by accidental human contact, and improve safety.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-atmosphere carbon nanotube furnace, comprising a carbon tube furnace main body (1), wherein a carbon tube (12) is arranged inside the furnace body of the carbon tube furnace main body (1), and is characterized in that: An intake pipe 1 (5) is connected to the furnace tail end of the carbon tube furnace main body (1), and an exhaust pipe 1 (10) is connected to the furnace head end of the carbon tube furnace main body (1); An intake pipe 2 (7) and an exhaust pipe 2 (8) which are arranged in a staggered manner are connected inside the furnace body of the carbon tube furnace main body (1), and carbon black (11) wrapping the carbon tube (12) is also filled inside the furnace body of the carbon tube furnace main body (1).

2. The multi-atmosphere nitrogen-carbon tube furnace according to claim 1, characterized in that: The intake pipe 1 (5) is a three-way pipe.

3. The multi-atmosphere nitrogen-carbon tube furnace according to claim 1, wherein: Water jackets (2) are provided both outside the furnace body and the furnace tail of the carbon tube furnace main body (1).

4. The multi-atmosphere nitrogen-carbon tube furnace according to claim 3, characterized in that: A connecting pipe (4) is connected between the water jackets (2) provided outside the furnace body and the furnace tail of the carbon tube furnace main body (1).

5. The multi-atmosphere nitrogen-carbon tube furnace according to claim 4, characterized in that: A water inlet pipe (3) is connected to the water jacket (2) outside the furnace tail of the carbon tube furnace main body (1).

6. The multi-atmosphere nitrogen-carbon tube furnace according to claim 5, wherein: A water outlet pipe (9) is connected to the water jacket (2) outside the furnace body of the carbon tube furnace main body (1).

7. A multi-atmosphere nitrogen-carbon tube furnace according to any one of claims 3-6, characterized in that: Flow blocking sheets are arranged in a staggered manner inside the water jacket (2).

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