Vacuum Furnace

Vacuum induction melting furnace Arc Melting Furnace

Name: Vacuum induction melting furnace Arc Melting Furnace
Brand: Kintek Solution
SKU: KT-VI
Rating: 4.8 (15 reviews)

Item Number : KT-VI

Price varies based on specs and customizations

Temperature: 1700 ℃
Vacuum: 6x10-3 Pa
Capacity: 5-500 kg

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Introduction

The Vacuum Induction Melting Furnace, adopting the theory of medium frequency induction heating and a high vacuum system, widely used in many kinds of research and production, such as nickel and special steel, precision alloy, activity metal, high-temperature alloy, magnet material, etc. This furnace is suitable for the vacuum precision cast of small parts, metal or alloy purification, and casting the material into a dense and homogeneous metal ingot.

Applications

Vacuum induction melting furnaces are widely used in various research and production fields, including:

Aerospace components casting
Manufacturing of complex valves for extreme conditions
Refining high-purity metals and alloys
Production of electrodes for remelting
Nickel and special steel production
Precision alloy fabrication
Active metal processing
High-temperature alloy development
Magnet material creation

Detail & Parts

Furnace StructureFurnace Structure (1. Base 2. Water cooling system 3. Furnace stack 4. Inductor 5.Sealing rotary bearing 6.Observation window 7.Feeder 8.Electrode 9. stove lids 10.Temperature Measuring 11.Vacuum system 12.Inflatable vacuum solenoid valve 13.vent valve 14.Φ50 Vacuum valve 15.Φ300) — Furnace Structure(1. Base 2. Water cooling system 3. Furnace stack 4. Inductor 5.Sealing rotary bearing 6.Observation window 7.Feeder 8.Electrode 9. stove lids 10.Temperature Measuring 11.Vacuum system 12.Inflatable vacuum solenoid valve 13.vent valve 14.Φ50 Vacuum valve 15.Φ300)

Vacuum induction melting furnace details

Features

Vacuum induction melting furnaces offer numerous advantages that make them ideal for a wide range of applications in research and production. These features include:
High vacuum environment: The furnace's high vacuum environment prevents oxidation and degassing, promoting metal oxide decomposition and resulting in high-purity melts.
Precise temperature control:The induction heating system allows for precise temperature control, ensuring consistent and repeatable melting results.
Versatile material compatibility:Vacuum induction melting furnaces can handle a wide variety of materials, including metals, alloys, and ceramics.
Energy efficiency:The induction heating system is highly energy-efficient, reducing operating costs and environmental impact.
Compact design:Vacuum induction melting furnaces are relatively compact, making them suitable for use in space-constrained environments.
Easy operation:These furnaces are designed for ease of use, with intuitive controls and automated features that simplify operation.
Safety features:Vacuum induction melting furnaces incorporate various safety features, such as over-temperature protection and emergency shutdown mechanisms, to ensure safe operation.

Principle

The vacuum induction melting furnace operates on the principle of medium frequency induction heating, where a high vacuum environment is created to melt metals. The furnace utilizes an induction coil to generate an alternating electromagnetic field, which induces eddy currents within the metal, causing it to heat up and melt. The vacuum environment prevents oxidation and contamination of the molten metal, allowing for the production of high-purity alloys. This process is particularly suitable for melting high-temperature alloys, active metals, and materials requiring precise composition control.

Advantages

Vacuum induction melting furnace is mainly composed of furnace body, support, inductor, furnace tilting mechanism, vacuum system, medium frequency power supply and electrical control system.

Furnace body: The furnace body and furnace cover have water-cooled interlayer to ensure the furnace surface temperature will not be too high; Side door at the furnace body can be added according to user requirements; Furnace cover is equipped with alloy feeder and observation window, which can add different alloy raw materials during smelting and observe the working conditions in the furnace.
Inductor: The furnace inductor is coiled into a spiral coil with thick wall copper tubes, and the outer layer of the induction coil is covered with a ceramic coating, which increases the firmness and extends the service life of the coil while ensuring the insulation of the coil.
Furnace tilting mechanism: manual furnace tilting, electric furnace tilting and hydraulic furnace tilting are available for users to choose. The furnace tilting angle is designed to tilt forward 105 degrees and backward 10 degrees without residual liquid. The furnace tilting speed can be adjusted continuously.
Vacuum system: consists of mechanical pump, roots pump, diffusion pump or booster diffusion pump, vacuum valve, damping elastic sleeve and vacuum pipeline. The configuration principle of vacuum system is to configure according to the physical and chemical properties and process of smelting materials.
Medium frequency power supply: IGBT medium frequency power unit, max. Temperature is up to 2000 ℃ .
Electrical control: Touch screen controller with PLC, vacuum measuring instrument, temperature measuring instrument and operation button, indicator light,and other components. It can realize the operation and control of pneumatic system, vacuum system, furnace cover lifting, furnace tilting, etc.

Safety Advantage

Effectively control and adjust alloy composition to produce high-performance metal or alloy materials.
Capable to inhibit the formation of non-metallic oxide inclusions produced in the metal solution and cast high-quality castings.
The unique electromagnetic stirring feature can effectively avoid element segregation during alloy smelting.
According to the different melting points of elements, some harmful volatile trace elements, such as antimony, tellurium, selenium, bismuth, etc., can be removed purposely

Technical specifications

Crucible effective volume	4L
Crucible effective capacity (Steel)	20kgs
Max temperature	2000 ℃
Max melting vacuum	7×10-3Pa Vacuum time: open diffusion pump when preheating is complete, then up to 7×10-3Pa in 30 minutes.
Rated power	60KW
Rated voltage	375V
Power frequency	50HZ
Rated frequency	1500~2500HZ
Rated frequency	1500~2500HZ
Heat element	Induction copper coil
Vacuum system	70L/s Double stage Rotary vane mechanical pump Dia.300mm diffusion pump, Max. pumping speed: 5000L/s Dia.300mm diffusion pump clod trap, effective cooling cycle for pump oil Dia.300mm diffusion pump flapper valve + Dia.80mm former pump flapper valve Stainless pipe + stainless bellows

Model	Capacity	Temperature	Vacuum	Rated power
KT-VI5	5kg	1700 ℃	6x10-3Pa	40Kw
KT-VI10	10kg			40Kw
KT-VI25	25kg			75Kw
KT-VI50	50kg			100Kw
KT-VI100	100kg			160Kw
KT-VI200	200kg			200Kw
KT-VI500	500kg			500Kw
Semi-contentiously melting production can be customized

Melting process

Step 1. Feeding:

The materials must be carefully cleaned, removed surface contamination, oil, etc. and baked to remove moisture.
Some complex recycling materials must be cut off and removed surface scale, non-metallic materials, etc.
When feeding, you need to make sure the materials at the top of crucible is looser than the bottom. Use small piece of material to fill the gap. Place more regular shape material at the top to avoid scaffold bridging during the melting. In the direction of tapping hole can amass some granular materials.
Feeding movements should be light to avoid crucible damage and slags in the metallic liquid.

Step 2. Vacuum pumping:

Firstly, open the 2-stage rotary pump to vacuum the furnace. At the same time, open the diffusion pump power supply, start heating the diffusion pump oil.
When the vacuum of 2-stage rotary pump is 15Pa and diffusion pump have been heated for about 50 minutes, now you can close 2-stage rotary pump valve, open diffusion pump valve, vacuum the furnace to the required high vacuum.

Step 3. Melting:

Firstly, open the thyristor medium frequency power supply, increase working voltage sensors gradually. Normally, start with the small power to avoid sudden sharp rise in temperature and vacuum dropped significantly. So the general rate of power increase should not make the vacuum dropped significantly.
The max power of furnace is subject to the medium frequency voltage and max current.Step 4. Refining

Step 4. Refining:

After all materials melting, when need to add alloy, you can turn the handwheel, then the alloy will drop into the feeding tipping bucket. Gently turn the operation handle, the alloy will drop into the crucible at the speed you need.
It’s easy to cause sputtering when some alloy drop into the crucible. You need to pay attention to the speed of alloy’s adding. It can’t be too fast. Sometimes, you need to lower the power, make the liquid surface a bit harder, then adding the alloy to reduce sputtering.

Step 5. Casting:

When refining complete, no need to cut off the power, tilt crucible to pour metallic liquid into ingot mould. Notice, do not pour it out of the ingot mould.

Maintenance

Cooling water:

When melting, you should pay attention to cooling condition of each part. The temperature of cooling water should not over 50℃. If the water pressure is inadequate or some part over temperature, you should cut off the power, find the reason and fix it, then restart. The hardness of water should not be too high, should be clean. Cooling water pressure: 0.2Mpa, water consumption: 3000kg/h.
When stop using the furnace for a while, you need to use compressed air to blow out the remained water to prevent corrosion and extent service life.

Vacuum system:

Replace the oil of diffusion pump and 2-stage rotary pump regularly. Add diffusion pump oil as lubricating oil to the seal parts regularly.
Pay attention to the heater of diffusion pump regularly. You can check if the heating wire is broken by measuring current.
When vacuuming steam-containing gas, you should open the gas ballast valve on the 2 stage rotary pump, or it will contaminate the oil in 2 stage rotary pump and lower the max vacuum.

Furnace:

When stop using the furnace, you should clean the furnace inside and outside and vacuum it.

Warnings

Operator safety is the top important issue! Please operate the equipment with cautions. Working with inflammable& explosive or toxic gases is very dangerous, operators must take all necessary precautions before starting the equipment. Working with positive pressure inside the reactors or chambers is dangerous, operator must fellow the safety procedures strictly. Extra caution must also be taken when operating with air-reactive materials, especially under vacuum. A leak can draw air into the apparatus and cause a violent reaction to occur.

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FAQ

What is a vacuum furnace used for?

A vacuum furnace is used for high-temperature processing of materials in a controlled environment without any contamination. It operates by surrounding the product with a vacuum, which prevents oxidation and heat loss from the product through convection. This furnace is commonly used for heat treatment of steel alloys at temperatures below 1200 °C. High-temperature vacuum furnaces can reach temperatures up to 3000°C and are used for industrial processes such as sintering, brazing, annealing, and heat treatment with high consistency and low contamination. The ability to achieve uniform heating across the entire workpiece is a key benefit of using a high-temperature vacuum furnace.

What is the process of a vacuum furnace?

The process of a vacuum furnace involves loading the parts into the chamber and creating a vacuum inside it by utilizing a vacuum pump. The next step is to heat the parts using temperature controls, which can reach between 1,500 and 5,400 degrees Fahrenheit. This process eliminates the possibility of oxidation and contamination, resulting in a higher purity end product. After heating, the parts are cooled and finished before being removed from the vacuum furnace. The furnace consists of various components, including the vacuum system, furnace shell, electric heating element, temperature controls, power supply system, and transport apparatus.

How does a vacuum induction melting furnace work?

A vacuum induction melting furnace works by utilizing electromagnetic induction under vacuum or protective atmosphere conditions to melt metals and alloys that combine easily or have close affinity with oxygen, nitrogen, and hydrogen. The furnace contains a refractory-lined crucible enclosed by an induction coil that generates an eddy current of heat in the material being processed. The furnace's vacuum system totally eradicates gases from the molten metals, and the cooling system contributes to the controlled melting temperature. The furnace is highly reliable, gives high productivity, and produces metals with very close compositional tolerances.

What is vacuum arc melting process?

Vacuum arc melting (VAR) is a secondary melting process used to produce metal ingots with high chemical and mechanical homogeneity for critical applications in industries like aerospace, energy, and nuclear. The process involves refining liquid metal under vacuum and controlling its solidification rate. It is used for the purification of reactive titanium or zirconium alloys, without any contact with casting refractories, as well as for improving inclusion cleanliness in steels and superalloys. The remelted cylindrical ingots can weigh several tons, and VAR has revolutionized the specialty metallurgical techniques industry.

What gas is used in a vacuum furnace?

Different gases can be used in a vacuum furnace depending on the application. In general, vacuum furnaces can work with gases or mixtures such as Argon, Nitrogen, Hydrogen, Carbon Monoxide, Helium, among others. The use of these gases allows for heat treatment in a defined, mostly non-oxidizing atmosphere, which is required for various applications such as vacuum soldering and brazing, vacuum annealing, and sintering. Additionally, it is possible to work with a defined oxygen concentration that is different from the air composition.

What are the advantages of vacuum induction melting?

The advantages of vacuum induction melting (VIM) include the elimination of gases, superior process control, close control of chemical analysis, slag-free melting, and melt protection. VIM is currently the most energy-efficient, fastest, low-consumption, and environmentally friendly induction heating technology for heating metal materials. The technology offers exceptional and reproducible control of reactive element-containing compositions and eliminates the need for a protective slag cover, decreasing the potential for accidental contamination or inclusions in the ingot. The process takes place in a vacuum environment, making it beneficial to remove gas impurities inside the metal, resulting in a more pure metal alloy material.

What is VAR Vacuum Arc Remelting (VAR)Furnace?

VAR or Vacuum Arc Remelting is a process used to refine and improve the cleanliness of ingots made from standard air-melted, vacuum induction melted, or ESR remelted alloys. It is used for steels, superalloys, titanium, zirconium, and their alloys in industries such as aerospace, power generation, defense, medical, and nuclear. VAR is a continuous remelting process of a consumable electrode under vacuum, with DC power used to strike an arc between the electrode and a copper mold. The process removes dissolved gases, reduces undesired trace elements, improves oxide cleanliness, and achieves directional solidification of the ingot from bottom to top.

What is the heating element used in a vacuum furnace?

The heating element in a vacuum furnace is critical to its proper functioning, and is dependent on factors such as maximum operating temperature, power load, partial pressure and quench gases, and life expectancy. Vacuum furnaces are heated by electric resistance elements made from a variety of materials, including high-temperature metallic alloys such as stainless steel, nickel-chromium, molybdenum, tungsten, tantalum, or of non-metallic materials such as graphite and silicon carbide. The choice of material for the heating element is important in maximizing its longevity, reliability, efficiency, and ultimately the process results.

How does vacuum help in induction melting furnace?

Vacuum conditions are critical in induction melting furnaces as they help to eliminate gases from the molten metals, preventing quick oxidation. The absence of gases during the melting process ensures the creation of very close compositional tolerances, resulting in consistent metals. The vacuum also provides a protective atmosphere for metals that combine easily or have a close affinity with oxygen, nitrogen and hydrogen. Vacuum induction melting furnaces use electromagnetic induction to melt metals and alloys in a refractory lined crucible enclosed by an induction coil, creating eddy currents that make the melting process possible.

How does vacuum arc melting furnace work?

A vacuum arc melting furnace works by melting materials under a vacuum or low-pressure atmosphere using electric arcs. The furnace uses two electrodes, one of which is the material to be melted. The electrodes are brought close together and an electric arc is struck between them, causing the material to melt. The furnace is then evacuated to remove any impurities and the molten material is cast into a desired shape. This process is used for the production of high-purity metals, alloys, and intermetallics used in industries such as aerospace, electronics, and biomedical engineering.

What is vacuum induction melting furnace?

A vacuum induction melting furnace is a metallurgical furnace that uses an alternating electromagnetic field to melt and form various materials under vacuum or protective atmosphere. It is widely used in the vacuum metallurgy field and is essential for producing alloys and special steels used in the aerospace, electronics, and atomic energy industries. Vacuum induction melting furnaces are also used to improve the hot workability and mechanical properties of nickel, cobalt, and iron-based superalloys, as well as to melt stainless steel, heat-resistant steel, ultra-high strength steel, and various other materials to ensure their quality and performance.

What are the applications of vacuum arc melting furnaces?

Vacuum arc melting furnaces are commonly used in the production of high-performance materials, such as superalloys, special steels, and reactive metals. These materials often require high-purity and controlled composition, which can be achieved through vacuum arc melting. The process is particularly suited for the production of critical components in aerospace, automotive, and energy industries, where high strength, corrosion resistance, and temperature stability are vital. Vacuum arc melting is also used in research and development settings to produce small quantities of specialized alloys for testing and characterization purposes.

What are the advantages of using vacuum arc melting furnaces?

Vacuum arc melting furnaces offer several advantages. Firstly, the high vacuum environment prevents oxidation and contamination, resulting in high-purity melted metals. This is especially important for producing materials with stringent quality requirements. Secondly, the electric arc generates intense heat, allowing for rapid and efficient melting of the metal. The process can be precisely controlled to achieve specific melting parameters, such as temperature, pressure, and cooling rate, facilitating the production of alloys with desired properties. Vacuum arc melting furnaces also offer flexibility in terms of the size and shape of the melted metal, as the consumable electrode can be easily replaced or modified. Additionally, the process allows for the selective removal of impurities, such as gases and non-metallic inclusions, further enhancing the purity and quality of the final melted metal.

What safety precautions should be followed when using a vacuum arc melting furnace?

When using a vacuum arc melting furnace, several safety precautions should be followed to ensure safe operation. Firstly, the furnace should be operated by trained personnel who are familiar with the equipment, its operation, and safety protocols. Adequate personal protective equipment, such as heat-resistant gloves, safety goggles, and fire-resistant clothing, should be worn when handling hot materials or operating the furnace. The vacuum system should be regularly inspected and maintained to ensure proper functionality and prevent safety risks. It is important to follow the manufacturer's guidelines and instructions for safe operation and maintenance of the vacuum arc melting furnace. Additionally, proper handling and disposal of consumable electrodes and melted materials should be carried out according to established safety guidelines and regulations. Regular inspections and maintenance of the furnace, including electrical systems, cooling systems, and gas handling components, should be performed to ensure safe and reliable operation.

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Vacuum induction melting furnace Arc Melting Furnace

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Introduction

Detail & Parts

Features

Principle

Advantages

Safety Advantage

Technical specifications

Melting process

Maintenance

Warnings

Designed for You

FAQ

What is a vacuum furnace used for?

What is the process of a vacuum furnace?

How does a vacuum induction melting furnace work?

What is vacuum arc melting process?

What gas is used in a vacuum furnace?

What are the advantages of vacuum induction melting?

What is VAR Vacuum Arc Remelting (VAR)Furnace?

What is the heating element used in a vacuum furnace?

How does vacuum help in induction melting furnace?

How does vacuum arc melting furnace work?

What is vacuum induction melting furnace?

What are the applications of vacuum arc melting furnaces?

What are the advantages of using vacuum arc melting furnaces?

What safety precautions should be followed when using a vacuum arc melting furnace?

PDF of KT-VI

Catalog of Vacuum Furnace

Catalog of Vacuum Furnace

Catalog of Vacuum Induction Melting Furnace

Catalog of Vacuum Arc Melting Furnace

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Materials Science with the Lab Vacuum Furnace

Exploring Tungsten Vacuum Furnaces: Operation, Applications, and Advantages

Vacuum Laboratory Furnaces in Advanced Materials Research

Vacuum Hot Press Furnace: A Comprehensive Guide

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