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Influence of power and frequency of intermediate frequency furnace on heating

Author : Hongteng Time: 2022-10-14

The principle of induction heating equipment is similar to the working principle of intermediate frequency induction furnace, both belong to the principle of electromagnetic induction.

Therefore, the heating effect produced by induction heating equipment with different frequencies is also different, which determines the level of heating quality.

The power of the intermediate frequency furnace determines the heating speed and efficiency. The following will introduce the power and frequency selection method of the induction heating equipment to you.

Frequency selection method of induction heating equipment

According to different output frequencies, induction heating equipment can be roughly divided into: ultra-high frequency, high frequency, super audio frequency, intermediate frequency and so on.

Different heating processes require different frequencies. If the wrong frequency selection cannot meet the heating requirements, such as slow heating time, low work efficiency, uneven heating, and the temperature does not meet the requirements, it is easy to cause damage to the workpiece.

If you want to choose the frequency correctly, first of all, you must understand the heating process requirements of the product. Generally speaking, there are the following situations:

Workpiece diathermy

For example: fasteners, standard parts, auto parts, hardware tools, rigging, hot upsetting and hot rolling of twist drills, etc. The larger the diameter of the workpiece, the lower the frequency should be.

The diameter is less than 4mm, suitable for high frequency and ultra-high frequency (100-500KHz). The diameter of 4-16mm is suitable for high frequency (50-100KHz), the diameter of 16-40mm is suitable for super audio (10-50KHz), and the diameter above 40mm is suitable for medium frequency (0.5-10KHz).

heat treatment

Shafts, gears, quenching and annealing of stainless steel products, etc. Taking quenching as an example, the shallower the quenching layer of the workpiece is, the higher the frequency should be, and the deeper the quenching layer, the lower the frequency should be.

The quenching layer is 02.-0.8mm, suitable for 100-250KHz ultra-high frequency and high frequency. 1.0-1.5mm is suitable for 40-50KHz high frequency, super audio. 1.5-2.0mm is suitable for 20-25KHz super audio.

2.0-3.0mm is suitable for 8-20KHz super audio and intermediate frequency, 3.0-5.0mm is suitable for 4-8KHz intermediate frequency, and 5.0-8.0mm is suitable for 2.5-4KHz intermediate frequency.

Smelting precious metals

Gold, silver, copper, lead and other precious metals are determined according to the furnace and production efficiency. Small capacity can choose high frequency, and most of them choose super audio frequency and medium frequency.

The super audio frequency can meet the general application of the die casting industry, and the general application of melting 200KG aluminum ingots per hour.

This is what we share today, I hope it can be helpful to you, welcome to follow Luoyang Hongteng to learn more about the intermediate frequency furnace.

Video of the use process of the furnace

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