In the s, induction heat treatment began to be used in China, when the process was called "high frequency quenching". This new heat treatment process uses a coil of electromagnetic induction to heat the workpiece quickly to the quenching temperature, which is then quickly cooled, so only the surface layer can obtain quenching tissue.
haoyuefurnace Product Page
It has a fast heating speed, better labor conditions, high strength and small deformation of the surface layer, etc., which is soon accepted by heat treatment workers and achieves speedy development.
The induction heating is fast, which can increase the phase change temperature of metal materials (50 to 100 '), accelerating the austenite transformation process. After quenching the surface to get fine cryptocrystalline martensite, the surface hardness is 2 to 3HRC higher than that of general quenching.
Induction heating tempering treatment can take the place of box furnace tempering treatment to save 35% to 50% electricity; induction heating can take the place of carburizing and carbonitriding and other surface hardening treatment to save 80% to 95% electricity; it takes the place of the overall heating quenching in the furnace to save 40% to 50% electricity.
The use of induction heating can transfer heat to the outside of quenching layer, and quenching and cooling don't take away all the residual heat and achieve a short tempering, with high energy efficiency, and in many cases (such as high-carbon steel and high-carbon high-alloy steel) can avoid quenching and cracking, while once the process parameters can be determined, mass production can be carried out. Besides, there are many benefits such as significant economic benefits.
The electricity consumption of induction heat treatment accounts for about 20% to 25% of the total electricity consumption of heat treatment equipment.
If you are looking for more details, kindly visit China Ultrahigh Frequency Heat-Treating Machine Manufacturer.
The thermal efficiency of electric furnace commonly used in heat treatment in China is generally less than 55%, the quenching of box electric furnace is 30% to 40%, and the high temperature tempering is 40% to 50%.
The carburizing rate of well-type gas carburizing furnace is 7% to 15%, quenching and heating of medium temperature electrode bath furnace is 18% to 25%, well-type tempering furnace tempering is 40% to 60%, and well-type tempering furnace tempering is 40% to 60%.
Thermal efficiency of induction heating furnace: lamp type high frequency furnace is 44% to 60%, machine type medium frequency furnace is 49% to 69%, silicon controlled stationary cross-frequency machine is 57% to 78%.
Using high frequency induction heating DC discharge for carburizing, it can obtain 0.35 to 0.45mm carburizing layer with 0.9% to 1.05% carbon potential on the surface of carburizing layer, which can shorten the production cycle by 10 to 12 times.
JKZ not only has a mature product development, manufacturing, marketing and after-sales service system, but also its products are now widely used in various fields such as metal welding, hot forging, quenching, metal melting and heat treatment. Welcome to consult.
The choice of induction heat treatment solution is related to the depth of the heating layer required by the workpiece. For the workpiece with a deep heating layer, should choose the medium frequency induction heating machine. For the workpiece with a shallow heating layer, should choose the high frequency induction heating machine.
The power supply equipment with low current frequency should be used; Another criterion for selecting a power supply is the machine power. As the heating surface area increases, the induction heat treating machine power required increases accordingly.
When the heating surface area is too large or the induction heat treating power supply is insufficient, the continuous heating method can be adopted to make the workpiece and the induction heating coil move relative, first heating and then cooling.
But it's best to heat the entire surface at once. In this way, the waste heat of the workpiece core can be used to temper the hardened surface layer, thus simplifying the process and saving electric energy. The main function of the induction heating and quenching machine is to position the workpiece and carry out the necessary movement. An induction heat treating system for providing a quenching medium shall also be attached. CNC induction hardening machine tools can be divided into standard machine tools and special machine tools, the former is suitable for the general workpiece, and the latter is suitable for mass production of the complex workpieces.
In order to ensure the quality of induction heat treatment and improve the thermal efficiency, the inductor with proper structure must be designed and manufactured according to the shape and requirement of the workpiece. Common induction coils include outer surface induction heating coil, inner hole induction heating coil, plane induction heating coil, and so on.
Want more information on China Ultrahigh Frequency Heat-Treating Machine Supplier? Feel free to contact us.