Since 1994
+86 28 8393 0607
Since 1994
+86 28 8393 0607
What is induction heating?
Induction heating is the process of heating an electrically conducting object (usually a metal) by electromagnetic induction, through heat generated in the object by eddy currents. An induction heater consists of induction power supply (induction heater) and inductor (coil) that is a shaped to contour the part, and a work station where the part is held and presented to the coil.
Development of electromagnetic induction heating technology
Magnetic induction heating originates from the electromagnetic induction phenomenon discovered by Faraday, that is, alternating current will generate an induced current in the conductor, causing the ferrous and non ferrous metal to heat up.The rapid development of power electronic devices and technology in the 20th century has greatly promoted the development of induction heating technology.
The first induction heating device was developed by thyristor, nowadays the most popular ans stable electric components are IGBT MOSFET and SCR.IGBT and SCR are used in big power induction heating applications with low frequency, while MOSFET is used in higher frequency applications. It is usually used in small power applications of several kilowatts, and the frequency can reach more than 500Khz, or even several megahertz.
Induction heating history in China
The real application of induction heat treatment technology in our country began in 1956. It was introduced from proficiency and mainly used in the automobile industry. With the manufacturing of power equipment in the 20th century, induction hardening process equipment also developed closely. Nowadays, the domestic induction quenching process equipment manufacturing industry is also expanding day by day, with a wide variety of products. Equipment that originally needed to be imported has been gradually replaced by domestic products, and domestic related enterprises have developed. At present, the induction heating manufacturing industry mainly serves the automobile manufacturing industry, fastener industry, petrochemical and natural gas pipeline industry, heavy industry manufacturing, shipbuilding industry, railway industry, nuclear industry, agriculture machinery, hardware tool industry,steel foundry,bearing industry etc.
Duolin, founded in 1994, is a trusted manufacturer of induction heating machines and solutions, with over 20 years of industry experience. Offering equipment with power ranges from 4-2000KW and frequencies from 0.5-400KHz, all products are designed by Duolin's expert engineering team and produced under strict ISO9001:2015 standards. As a high-tech enterprise, Duolin holds more than 20 national patents, providing energy-efficient and reliable induction heating systems for industries worldwide.
Duolin's induction heating solutions are widely used for applications such as carbon steel hot forging, gear shaft hardening, long bar heat treatment, pipe heating for hot bending, and non-ferrous metal heating like aluminum and copper. Since expanding internationally in 2007, Duolin has established agents in countries like Brazil, Germany, and India, with end users in over 15 countries, some of whom have been partners since 2009.
Duolin induction heating application
Duolin as one of the first batch induction heating equipment manufacture in China,founded in 1994,with 27 year of experience,Duolin team involved the following induction heating industry and still explore more industry...
Billet Heater For Hot Forging
Pipe and Tube inductive heating machine
Induction Heat Treating System
Induction Brazing Equipment
Induction Annealing Heating Machine
Billet Heater For Hot Forging
Induction heating equipment for hot forging is the most common heating application in heavy industry, the advanced induction heating technology support customer with high efficiency, energy saving, environment friendly and green repeatable heating way. Duolin devoted in forging industry and installed more than 500 set turn-key induction hot forging machine in China and aboard, round and square blank continuous heating, billet end head forging unit, automatic bar fixture or manual feeding bar, Duolin team would offer you suitable and complete steel bar induction forging furnace.
Pipe and Tube inductive heating machine
Duolin Pipe&Tube induction heating system bring uniform temperature from pipe surface to the center, heating purposes are pipe heating for hot bends, elbow, pipe surface coating, pipe preheating or tube annealing, pipe expand etc.
Send us your pipe OD ID, material, heating requirements, Duolin team will offer you professional pipe induction heating system according to your heating application.
Induction Heat Treating System
Induction hardening and tempering will change metal's microstructure to get proper physical performance and mechanical properties.Duolin provide gear, shaft, long bar, thread rod, pin, roller, wheel, knife etc CNC induction scanner to cover construction industry, automotive agriculture tool, aerospace field and railway line.
Induction Brazing Equipment
Duolin induction brazing machine designed for saw blade, tools, carbide tip, rotor, copper pipe, stainless pipe etc, the main industry is air condition, new energy, machine tools, drilling industry. What is the material you need to joint together with induction heating? Duolin engineer team would be delight to do anything.
Induction Annealing Heating Machine
Duolin induction annealing equipment offer customer softer hardness and reduce stress to get uniform micro structure and improve the material corrosion resistance, no need the high temperature and cool slow down, Duolin team has experience on stainless steel, brass etc.
Benefit of induction heating
Fast Heating: Only demand several seconds to heat up the surface of work piece if choose suitable heating solution with perfect output power and working frequency.
Fast Start-up: Induction Furnaces contain large amounts of refractory materials that must be heated during start-up, resulting in large thermal inertia. The internal heating of the induction heating process eliminates this problem and allows much quicker start-up.
Temperature control: Induction heating can be used on induction forging and hardening or brazing, it is easy to stop heating when temperature reached required with the detect of infrared thermometer,ensure the heating quality
High Production Rates: Because heat treating times are short, induction heating often allows increased production and reduced labor costs.
Repeatable and controllable: Can set program for automatic working mould,save labor and improve the working environment
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Add.: 112th Hancheng Road Xindu Industrial Zone Chengdu China
