Energy-saving Measures for Heat Treatment of Induction Heating Furnace

Induction heating furnace heat treatment is an energy-saving process, but improper selection of heat treatment equipment and process application of induction heating furnace will cause energy-saving equipment and processes to waste electrical energy. Therefore, the following aspects should be noted:

1) Choose the frequency, power and type of heat treatment equipment for induction heating furnace. The frequency must comply with the penetration heating, the power must meet the principles of short heating cycle and low heat conduction loss, and the equipment type must select important accessories with high frequency conversion efficiency, such as the efficiency of intermediate frequency transformers. For example, the frequency conversion efficiency of solid-state power supplies is higher than that of electronic tube high-frequency power supplies. Under the same technical conditions, solid-state power supplies should be used as much as possible. In solid-state power supplies, transistor power supplies are more efficient than thyristor power supplies. Therefore, IGBT or MOSFET power supplies should be preferred. The efficiency and water consumption of different types of quenching transformers are also very different, so attention should be paid to the selection.

2) Equipment working specifications must be appropriate. Improper adjustment of the electronic tube high-frequency power supply load, such as inappropriate anode current and gate current ratios, especially in the under-voltage state, the anode loss of the oscillator tube is large, and the heating efficiency is reduced. To avoid it, when the intermediate frequency power supply is debugged, the power factor should be 0.9 about.

3) The requirements for induction heating furnaces are: high load factor and short idle running time. Multi-axis, multi-station heating can be used at the same time, the multi-axis, multi-station structure is preferred. Taking mass production of semi-shaft parts as an example, one-time heating is more energy-efficient than scanning quenching.

4) The efficiency of the induction heating furnace is greatly related to the design. The efficiency of a good induction heating furnace is more than 80%, and the efficiency of a bad sensor is less than 30%. Therefore, it is necessary to design and manufacture the induction heating furnace well, and continuously optimize it during the production process.

5) Tempering of quenched parts in induction heating furnace should be self-tempering or induction heating furnace tempering preferred.