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1Laboratory vacuum melting furnace(1-10kg)1
The Small lab Vacuum Induction Melting Furnace melting Capacity ranges from 500 grams-10kg , and can be applied with crucible with different materials, For example, zirconia, alumina, magnesia, graphite, quartz, you can choose according to different metals
Laboratory Small vacuum melting furnace is a major university, scientific research institute material laboratory vacuum furnace, but also a production company’s research and development department of the experimental electric furnace. This Small Lab vacuum Melting furnace for experiments has the characteristics of high temperature and high vacuum and is the key equipment for various high-temperature metal alloy tests. The laboratory vacuum induction furnace is capable of melting metals under vacuum (or with protective gas) using the principle of medium-frequency induction heating. Due to its tight control of temperature and alloy composition, electromagnetic stirring, and powerful high vacuum degassing capacity. It is ideally suited for use in metallurgical plants and related scientific research departments as a high vacuum degasser for nickel-based, iron-based, high-grade precision alloys, high-purity metals, and other materials.
1Batch vacuum furnace(single-chamber VIM systems)1
Batch Vacuum induction melting furnace is also called single-chamber vacuum melting furnace which shares one melting and casting chamber design. If you want to take out the ingot mold, you have to break the vacuum condition of the whole furnace body, and then refill, one cycle for each melt can not continuously melt, so it is called a cyclic furnace. Single chamber Vacuum induction melting furnace is the most commonly used process in the metallurgical industry for the refining, liquid treatment, chemical processing, and processing of metals and alloys.
Single Chamber Induction Melting Furnace characteristics.
-Increases yields from saving raw materials, such as alloying elements.
-Effectively controls and adjusts alloy composition to produce high-performance metals and alloys.
It inhibits the formation of non-metallic oxidation inclusions in metal solutions, resulting in high-quality castings.
-It can effectively avoid the phenomenon of elemental segregation during alloy melting by using its unique electromagnetic stirring feature.
-Depending on the melting point of the elements, it can effectively remove some harmful volatile trace elements such as antimony, tellurium, selenium, and bismuth.
Three-Chamber Vacuum Induction Furnace
Three Chamber Vacuum Induction Melting Furnace also named as Double chamber Vacuum Induction Melting FUnrace, The vacuum induction melting furnace has three working chambers, which can achieve vacuum feeding, vacuum casting, and the entry and exit of ingot molds under vacuum. It is the preferred equipment for large-scale high-temperature alloy vacuum melting and precision alloy casting. This product has the characteristics of compact structure, powerful functions, safety, and reliability, etc
Three-chamber vacuum melting furnace comes with a design for the whole melting process under vacuum conditions, using the principle of medium-frequency induction heating, the metal charge placed in the crucible is melted under the action of the induction ring to produce an alternating magnetic field, and the molten metal is poured into the ingot, under vacuum through the inner door into the ingot chamber. After closing the inner door, vacuuming, refilling, remelting, etc. are carried out. At this point, the furnace door can be opened at a certain time to remove the ingots and so on. It is characterized by the separation of the functional chambers from each other, the vacuum in the melting chamber is not destroyed, and the casting process is completed by the closure of the valve. The process can continuously add the steel, the reciprocal closing and opening of the valve,
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Chapter1:
Vacuum Induction melting furnace
Vacuum Induction melting furnace
With the rapid development of modern industrial technology, people’s requirements for the use of mechanical parts are getting higher and higher, and the more stringent the use of the environment on the metal material’s high-temperature resistance, wear resistance, fatigue resistance, and other properties put forward higher requirements. For some specific metals or alloys, either in preliminary research and development trials or at a later stage in mass production, the research or obtaining of high-performance metal alloys requires the support of metal melting equipment, surface heat treatment equipment, etc. Among the many special heating or melting methods, induction heating technology plays a vital role in the preparation of metal materials by melting or in the sintering of materials in certain processes, heat treatment, etc.
Vacuum induction melting furnace is a melting equipment that melts metal by induction heating under vacuum and then pours the liquid metal into a mold to obtain metal ingots. the material is to create metal bar sticks, electrodes, flakes, wires, foils, or bands depending on the user’s requirement.
Melting and casting in vacuum or controlled inert gas atmosphere is often required for the production of a variety of high-performance metal alloys and is essential for quality manufacturing of Ni-based super-alloys as well as Fe-, Co-, Cr-based, and other special alloys.
The development of vacuum induction furnaces began around 1920 and was mainly used to melt nickel-chrome alloys. It wasn’t until World War II that the advancement of vacuum technology was facilitated, allowing vacuum induction melting furnaces to develop.. During this period, due to the demand for alloys, vacuum induction melting furnaces continued to move to larger capacity, from the first small capacity to very large to production capacity which can up to 10 tons.
Chapter2:
Brief introduction of vacuum melting furnace
To adapt to high-volume production, in addition to the change of equipment capacity, the structure of the induction furnace has evolved from a cyclic vacuum melting furnace(single-chamber vacuum furnace) on a periodic basis to a continuous or semi-continuous vacuum induction melting(double-chamber vacuum furnace) with charging, mold preparation, melting and pouring operations.
Continuous operation in a non-stop furnace saves time for loading and cooling of ingots, and continuous production increases efficiency while increasing alloy production. Better meet the needs of actual production.
The diagram shows the basic form of a vacuum induction melting furnace, where the metal material is added to the melting crucible through a rotating turret and the vacuum pumping system removes the gas from the inside of the vessel to a suitable vacuum level, When melting, the turret is rotated at an angle, the other side of the arm is aligned with the crucible, and the temperature is measured by inserting the thermocouple downward into the metal melt. The melted metal is driven by a tilting mechanism and poured into the mold to achieve the smelting of the metal.
The whole process is simple and convenient to operate, each melting requires one to two workers to complete, the melting process can realize real-time temperature monitoring, material composition adjustment, and the final metal material more in line with the process requirements.
Chapter3:
3. Vacuum melting furnace classification
3.1 LABORATORY VACUUM MELTING FURNACE(1-10kg)
Laboratory Small Induction vacuum Melting furnace is not only applied to major universities, scientific research institutes & material laboratory, but also can be used in the production company’s research department. The laboratory vacuum induction furnace is capable of melting metals under vacuum (or with protective gas) using the principle of medium-frequency induction heating. Due to its tight control of temperature and alloy composition, electromagnetic stirring, and powerful high vacuum degassing capacity. It is ideally suited for use in metallurgical plants and related scientific research departments as a high vacuum degasser for nickel-based, iron-based, high-grade precision alloys, high-purity metals, and other materials. Effective equipment for melting and casting under the conditions.
1-3kg laboratory Small vacuum Induction furnace: generally equipped with a direct link rotary vane vacuum pump, oil diffusion pump, or molecular pump, with high vacuum, strong function, compact equipment, and small footprint, etc.
5-10kg Small vacuum Induction furnace: generally equipped with a three-stage pump, with a wide range of functions, such as the advantages of small castings, test rods, and ingots can be melted.
Materials Which can Melt
Ni-base super-alloys
Fe-, Co-, Cr-base alloys
High alloy steels & Magnetic alloys
High purity Cu-, Al- and Mg-alloys
Precious metals and their alloy
Refractory metals and their alloys
Applications and Markets Served
Research and development
Pilot-scale production
Aviation industry
Power engineering
Electronics and chemical industry
Bio-medical engineering
Precious metal industry
3.2 Batch vacuum furnace(single-chamber VIM systems )
Single vacuum melting furnaces share a melting and casting chamber. If you want to take out the ingot mold, you have to break the vacuum of the whole furnace, then refill, vacuum, and melt under atmospheric pressure, one cycle for each furnace, so it is also called a cyclic induction melting furnace. It is mainly used for the melting of stainless steel, high-temperature alloys, and magnetic materials, and the production of alloy bars for precision casting and remelting electrodes. Periodic production.
3.3 Three Chamber vacuum induction melting
The semi-continuous vacuum induction melting furnace (Three Chamber vacuum induction melting)is composed of a main body, an intermediate frequency power supply (IGBT100/2.5S) electrical control, a vacuum system, an incoming system, a tilting mechanism, coils, isolation valves, pneumatic systems, and a water-cooling system. In addition, it is also equipped with a workbench.
The three-chamber semi-continuous Vacuum Induction Melting Furnace consists of an ingot mold chamber, a melting chamber, and a feeding and measuring greenhouse. It consists of four parts and three vacuum chambers, commonly known as a three-chamber Vacuum Induction Melting furnace.
The ingot mold room includes: an ingot mold lifting system, ingot mold temperature measurement system (optional), furnace door system, forklift walking system
Two-stage vacuum pumping system, vacuum measurement system, cooling water unit, and valve unit.
The melting chamber includes shaft feeding system, coil unit, three-level vacuum system of the melting chamber, and various valve units,
Furnace cover lifting system, coil tilting furnace system, observation window unit, monitoring unit, plug-in valve insulation screen unit, explosion-proof unit
The temperature measurement and feeding are combined through a rotary tower to form an auxiliary vacuum chamber, whose main function is to maintain the vacuum of the melting chamber without damaging it,
Temperature measurement and secondary feeding of the molten steel in the melting chamber.
The ingot mold chamber is isolated from the melting chamber through a flap valve. The melting chamber is isolated from the temperature measurement and feeding chamber through a plug valve
(See figure below)
Semi-continuous vacuum furnace means the whole melting process is under vacuum conditions, using the principle of medium-frequency induction heating, the metal charge placed in the crucible is melted under the action of the induction coil to produce an alternating magnetic field, and the molten charge is poured into the ingot under vacuum through the inner door into the ingot chamber. After closing the inner door, vacuuming, refilling, remelting, and then carried out. At this point, the furnace door can be opened at a certain time to remove the ingots and so on. It is characterized by the separation of the functional chambers from each other, the vacuum atmosphere in the melting chamber is not destroyed, and the casting process is completed by the closure of the valve. The process can continuously add the steel, the reciprocal closing, and opening of the valve, so it is called a semi-continuous (also called compact) vacuum induction melting process.
