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2025

Aug. 26,

How to Select a High Frequency Induction Hardening Machine

What is a High-Frequency Induction Hardening Machine?


A high-frequency induction hardening machine is primarily used for the induction quenching of industrial metal parts. It is a surface heat treatment method in which an alternating electromagnetic field induces eddy currents on the surface of a metal workpiece, rapidly heating it, followed by quick cooling to harden the surface.


Working Principle:


The workpiece is placed inside a copper tube induction coil. When high-frequency AC flows through the coil, it generates an induction current on the workpiece surface. This current rapidly heats the surface to 800–1000°C within seconds, while the core remains near room temperature. The heated surface is then immediately cooled using water spray or oil quenching. This process hardens the surface to the desired depth and hardness without affecting the inner core of the metal part.


High-Frequency Induction Hardening Machine Features:


1. IGBT-based high-frequency induction hardening system.

2. Wide frequency range for fast and efficient heating.

3. Precise control of temperature and heating time.

4. Built-in self-protection and alarm functions.

5. Uniform and consistent hardening results.

6. Customizable induction hardening coils to suit different applications.


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Applications of High-Frequency Induction Hardening Machines


High-frequency induction hardening machines are mainly used for the induction heat treatment of various metal workpieces, including:


1. Automotive and Motorcycle Components:

    • Crankshafts, connecting rods, piston pins, camshafts, valves

    • Gearbox gears, forks, spline shafts, transmission half shafts

    • Small shafts, crank pins, rocker arms, rocker arm shafts

    • All types of high-frequency induction quenching for parts requiring durability and wear resistance


2. Hardware Tools:

    • Vices, hammers, pliers, wrenches

    • Surface hardening through high-frequency quenching


3. Hydraulic Components:

    • Plunger pump plungers, rotor pump rotors

    • Various valves, reversing shafts, gear pump gears


4. Power Tools:

    • Gear shafts and other high-wear components of various power tools


5. Woodworking Tools:

    • Axes, planers, and other tool parts that require surface hardening


How to Select a Suitable High-Frequency Induction Hardening Machine


The selection principle for a high-frequency induction hardening machine is based on the required hardening depth:


  •    ·  Shallow hardening depth → Higher frequency

  •    ·  Deeper hardening depth → Lower frequency


Recommended Frequency Ranges for Various Hardening Depths:



Hardening DepthRecommended Frequency Range
0.2 – 0.8 mm100 – 250 kHz
1 – 1.5 mm40 – 80 kHz
2 – 3 mm8 – 20 kHz
3 – 5 mm4 – 8 kHz
5 – 8 mm0.5 – 4 kHz


Getting a Faster Quotation:


To provide an accurate and quick quotation, please supply the following information:


·  Details of the parts to be hardened

·  Required induction hardening depth

·  Desired hardness level after hardening


With these specifications, a suitable high-frequency induction hardening machine can be recommended efficiently.


With the rapid development of the industry, the quality of the products is very important, and our induction heating equipment is constantly improving in every aspect. Induction heating machine has been widely used in many industries such as machinery, electronics, electrical appliances, vehicles, medical, aerospace and other industries, we have to develop better induction heating technology. As a manufacturer of induction heating equipment with 20 years, we have our own R&D and production departments.


How to Identify the price and quality of high frequency induction hardening machine?cid=3


Nowadays, many new manufacturers begin to produce high frequency induction hardening machines too. Please pay attention to the price and quality. We must take the quality as the most important thing even when the price might be slightly higher. Because there are more and more small and new manufacturers in this industry, the price of equipment can also be said to be various. When we buy a high frequency induction hardening machine, many customers will have an estimate in mind. The equipment quotations in the market are different. Some are within the customer's estimated range. Therefore, customers often choose according to the actual situation. to choose equipment, and most customers choose the equipment they are satisfied with.


How to Identify the price and quality of high frequency induction hardening machine?cid=3


Most users start from the quality first and then understand the price of high frequency quenching equipment. But some of them reduce their quality requirements because of the price. Or how does he distinguish the contrast between quality and price at all. Since the price of high frequency quenching equipment can be relatively objectively understood, the higher the price of the equipment, the better the quality. Buyers need to be wary of some manufacturers in order to attract a large number of customers to buy and seek higher profits. But we also hope that customers can make more comparisons and choose high frequency induction quenching equipment manufacturers that are suitable for their own price and quality. I hope that all customers can choose the high-frequency induction hardening machine equipment that is really suitable for them. Of course, if you have any questions, please write to us. 


At the same time, if you are interested in induction heating machines or have any question, please consult the online customers of the website or email us too.

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