Super audio induction heating furnace

Introduce:What should you pay attention to when selecting a super-audio heating furnace? What are the mistakes in the selection of super-audio induction heating furnaces for heating, quenching, welding and annealing?
  • Introduction
  • Consultation

I. Overview: Super Audio most industrial induction heating furnace for surface hardening metal parts, a certain surface of the workpiece is induced current, rapid heating of the part surface, then the heat treatment method of a metal is rapidly quenched. Super-audio induction heating equipment, which is a device that inductively heats a workpiece to perform surface hardening.

Ultra-frequency induction heating furnace principle: the workpiece into the sensor, the sensor is typically an input intermediate frequency or high frequency alternating current (1000-300000Hz or more) hollow copper tube. The alternating magnetic field generates an induced current of the same frequency in the workpiece. The induced current is uneven in the distribution of the workpiece, strong on the surface, and weak inside, to the core close to 0 , using this skin effect , can rapidly added to the surface heat , the surface temperature rises within a few seconds deg.] C to 800-1000, and the core portion temperature rise is small.

Second, the super-induction induction furnace conventional product parameters


SD P-16

SD P-26

SD P-50

SD P-80

SD P-120

SD P-160

input power


26 KVA

50 KVA

80 KVA

120 KVA

160 KVA

Input voltage

Single phase 220V 50-60HZ

Three-phase 380V 50-60HZ

Three-phase 380V 50-60HZ

Three-phase 380V 50-60HZ

Three-phase 380V 50-60HZ

Three-phase 380V 50-60HZ

Oscillating frequency







Inlet water pressure







Third, the application field of ultra-audio frequency induction heating furnace

1. The enthusiasm of various high-strength bolts and nuts; 
2. Quenching of various gears, sprockets and shafts; 
3. Quenching of various semi-axles, leaf springs, forks, valves, rocker arms, ball pins and other auto parts. 
4. Quenching of various internal combustion engine parts and reduction surface parts. 
5. Quenching of various hand tools such as pliers, knife cutters, axes, hammers, etc. 
6. Welding of various diamond composite drill bits; 
7. Welding of various carbide cutting heads and saw blades; 
8. Various picks, drill heads, drill pipes, coal drill bits, wind drills and other mines.

Fourth, the ultra-audio frequency induction heating furnace can be heated forging

1. The enthusiasm of various standard parts, fasteners, various high-strength bolts and nuts;

2 , heating forging of bars within 800mm in diameter ;

3 , mechanical parts, hardware tools, straight shank twist drill hot, hot rolling

V. Application hardening furnace in terms of ultra-audio frequency induction heating

1. Quenching of various gears, sprockets and shafts;

2 , various semi-axles, leaf springs, forks, valves, rocker arms, ball-pins and other automotive and motorcycle parts quenching.

3. Quenching of various internal combustion engine parts and speed reducer parts;

4. Quenching treatment of machine tool bed rails in the machine tool industry (lathes, milling machines, planers, punching machines, etc.).

5 , quenching of various hand tools such as pliers, knife and scissors, axe, hammer, etc.

Sixth, application of super audio frequency induction heating furnace in welding of

1. Welding of various diamond composite drill bits;

2. Welding of various carbide heads and saw blades;

3. Welding of mining parts such as various picks, drill heads, drill pipes, coal drill bits and wind drill bits;

Seven applications in ultra-audio frequency induction heating furnace annealing terms

1 , a variety of super audio induction heating equipment or local annealing

2 , various stainless steel products annealing treatment

3 , metal material heating annealing, rising type

Eight, what are the advantages of super audio induction heating furnace ?

1. Adopt international famous company Siemens IGBT power device and unique inverter technology, designed with 100% load continuation rate, 24 hours operation under maximum power , high reliability guarantee.

2 , the self-control type can adjust the heating time, heating power, holding time, holding power and cooling time; greatly improve the quality of heating products and the repeatability of heating, simplifying the operation technology of workers.

3 , light weight, small size, simple installation, connected to 380V three-phase power, water, water, can be completed in a few minutes.

4 , the footprint is very small, easy to operate, can be learned in a few minutes.

5 , especially safe, the output voltage is lower than 36V , eliminating the danger of high voltage electric shock.

6 , the heating efficiency is up to 90% , the energy consumption is only 20% - 30% of the high frequency of the old-fashioned tube , almost no electricity in the standby state, and can work continuously for 24 hours.

7. The sensor can be disassembled and replaced freely, and the ultra-fast heating greatly reduces the oxidative deformation of the workpiece.

8. The latest environmentally friendly products that replace the heating of dangerous substances such as oxygen, acetylene and coal, are safer and safer to produce without open flame.

9. The equipment has over-current, over-voltage, over-temperature, water shortage, and lack of perfect automatic protection functions, and is equipped with a fault self-diagnosis alarm system.

10 , the device has a constant current and constant power control function, greatly optimize the metal heating process, achieve efficient, rapid heating, the product's superior performance is fully exerted.

Nine, what should you pay attention to when selecting a super-audio heating furnace ?

1, heating, welding-based ultra-frequency induction heating furnace, a frequency of about 15kHz, about φ80 heatable work, various carbide cutting tools and the like may be welded

2 , quenching super-audio induction heating equipment , the frequency is about 40KHZ , the small one can quench φ10 or so high-precision small shaft, the hardened layer is kept within 1mm , the larger one can be φ250 diameter large shaft, and can also quench φ500 or so gear.

3, based super audio induction heating annealing apparatus may be integral with or part of the annealing process various mechanical parts. The φ300 diameter stainless steel container can be subjected to tensile annealing.

Ten, what are the misunderstandings when choosing a super audio heating furnace ?

Misunderstanding 1: only look at power, do not look at frequency

When standard parts, fasteners, etc. heating, when heating the workpiece diameter "is 80mm, IF equipment should be selected, while still resulting in a high frequency outside the workpiece opportunity" burn flow "inside the" black "(commonly known as" burn-impermeable " ), not only the equipment efficiency is greatly reduced, but also reduce the mold life or even cause mold damage, invisible cost increase, but I do not know the reason.

Misunderstanding 2: just look at the output, do not look at the input

Ignore the efficiency of the equipment and the power consumption factor. After purchasing the equipment, I found out that it was an " electric tiger " , which made it affordable and could not afford the embarrassing situation. For example, the same 80 machine, but an input power is 80kw , but the equipment work efficiency is very different, although the heating requirements can be completed, but the power consumption makes Yonghe complain not to fall. The output power of the device outputting 80lw is as high as 120kVA .

Misunderstanding 3: only look at the model, do not look at the power

For example, the equipment input current 120A and input power 120KVA are mixed together, collectively referred to as 120 machines, so that after the purchase, the real power is only 80KVA , which is obviously cheap, but it is a loss.

11. What are the applications of super audio equipment ?


Heating type

Application range

Frequency selection

Power selection




Drills, turning tools, reamers, milling cutters, drill bits, etc. and composite welding of different materials on stainless steel pot bottom.

  Principle: The larger the welding volume, the lower the frequency should be. For tools smaller than 30*30*30, the height can be high; greater than 30*30*30, the intermediate frequency can be used.   Principle: The larger the diameter of the workpiece, the lower the frequency should be.

It depends on the specific workpiece shape, material, solder, etc.




Fasteners, standard parts, auto parts, hardware tools, copper rods, hot and cold rolling of twist drills, etc.

Φ20 or more, medium frequency (1-20KHZ)

Φ5-20, high frequency (20-100KHZ)

Below Φ5, UHF (100-500KHZ)

According to the production efficiency, choose the right power, the higher the power, the faster the speed. Specific can consult the company's technical staff.




Shafts, gears, sprockets, machine tool rail accessories, quenching, etc.

Principle: The shallower the hardened layer is required for the workpiece, the higher the frequency should be. 
Ultra-high 100-500KHZ below 1mm

1-2.5mm super audio 20-100KHZ

Medium frequency 1-20KHZ above 2.5mm;

Combined with the shape of the workpiece, quenching method, quenching hardness, hardened layer requirements and materials, etc., you can consult the company's technical staff.



Metal wire pipe annealing, hydraulic fittings, auto parts, knife and pliers, stainless steel pot annealing, etc.

Combined with the requirements of workpiece annealing, annealing speed and materials, you can consult the company's technical staff.





Precious metals such as gold, silver, copper and lead


Medium frequency; small capacity optional high frequency

It depends on the furnace and production efficiency.



Aluminum-plastic pipe, steel-plastic pipe, cable, wire heating film; aluminum foil sealing used in food, beverage, pharmaceutical industry.

Depending on the circumstances

Depending on production speed, material, temperature.

Special functions and supporting equipment

Such as dual-frequency equipment, multi-load matching type (double head, multi-tap), automatic control type, one to two, bridge oil pipeline elbow, constant power constant current, soft connection sensor.






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