Old-style flame furnaces are still an attractive alternative heating method due to their low basic investment. In the case of lower fuel and gas costs, its importance is still comparable to induction furnaces. Due to the instability of fuel costs, the precise cost comparison intelligence is specific to the equipment within the specified time. However, in addition to the basic investment, it is also necessary to consider the actual situation of the application, which is also worthy of attention.

1. The time required for the slab to heat in the induction furnace is much shorter than the time it takes to heat it in the furnace. Thus such a short heating time is advantageous in reducing the generation of scale. It is heated by a flame furnace and has a typical scale of 3-4%. If heated by an induction furnace, it can be reduced to 0.5%. Scales of the scale can cause accelerated wear of the forging die (using induction heating can increase die life by 30%).

2. Since the heating zone has no combustion products, thereby effectively eliminating the oxidation and decarburization of the steel parts, the clean steel slab can be obtained by heating in an induction heating furnace. Surface decarburization of high-speed steel and tool steel materials containing high carbon and high alloys is said to be up to 5% by weight. This decarburization layer must be removed from the product, which creates problems in both material consumption and processing allowance. The use of induction heating, a high-temperature short-time heating method, allows high-speed steel and tool steel to meet the primary decarburization range of BS4659.971, eliminating the need for machining the surface of the steel.

3, accurate temperature control and the absence of oxide scale can extend the life of the mold.

4. Due to the fast induction heating, it is suitable for installation on automated production lines.

5. When the operator eats, exchanges the mold and the production has a pause, due to the quick start capability (usually reaching the normal state within a few minutes), the heating device can be shut down, thus saving energy. When the fuel furnace restarts production, it takes several hours to reach the working temperature, and it is normal to even stop the shift to avoid and delay the damage of the furnace wall.

6. The workshop area occupied by the induction heating furnace is much smaller than that of the ordinary furnace. Since the furnace body of the induction heating furnace does not generate heat, the space around it can be utilized, and the working conditions of the workers are also improved.

7. Since the induction heating furnace does not need to generate combustion and there is no heat radiation, there is little ventilation and exhaustion in the workshop.

8. Since the induction heating furnace does not have the perfect protective facilities required for the explosive gas mixture, and does not produce toxic fumes, and there is no danger of burns from the furnace shell, the sanitary and safety conditions are improved. Of course, its electrical components are designed to meet specified safety standards.

9. Induction heating furnaces can be designed as devices with a certain uneven heating gradient. For example, in extrusion work, such induction furnaces typically utilize the ends of the heated billet and bring them to a higher temperature range in order to reduce the initial pressure of the extrusion head. And it can compensate the heat generated by the billet during the extrusion process. Heating the billet with a fuel furnace also requires a quenching step to achieve this state. Although a fast-channel gas furnace can achieve stepwise heating of the billet, this has to do with the loss of energy and the cost of additional equipment.

10. Heating with a flame furnace takes a long time to change the heating temperature. When it is necessary to change the heating temperature several times a day, it is very disadvantageous. The induction furnace can be adjusted and reached a new heating temperature in a matter of minutes.