Electric furnace heating characteristics - Huaqiang Electronic Network

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

TP-IP4220CZ6 5V 0.35PF breakdown voltage 6V SOT

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Fast heating speed, high production efficiency, less oxidative decarburization, saving material and forging die cost. Because the principle of medium frequency induction heating is electromagnetic induction, its heat is generated in the workpiece itself, and ordinary workers can use the medium frequency electric furnace for forty minutes after work. The continuous work of the task does not require the professional workers to burn the furnace and seal the furnace in advance. There is no need to worry about the waste of the heated billet of the coal stove caused by power outage or equipment failure. Due to the rapid heating rate of the heating method, the experimental electric furnace has very little oxidation, and at least 20-50 kg of steel raw materials are saved per ton of forgings and coal burning furnace, and the material utilization rate can reach 95%. Since the heating method is uniform in heating and the temperature difference of the core surface is extremely small, the life of the forging die is greatly increased in forging, and the surface roughness of the forging is also less than 50 um.

The working environment is superior, the worker's working environment and company image, pollution-free, low-energy induction heating furnace are compared with the coal stove. Workers will no longer be bake and smoked in the hot coal stove, but also reach the environmental protection department. The requirements of various indicators, while establishing the company's external image and the future development trend of the forging industry. Induction heating is the most energy-efficient heating method in electric heating furnaces. The power consumption per ton of forgings heated from room temperature to 1100 °C is less than 360 degrees. Uniform heating, the core table temperature difference is very small, the temperature control precision is high, the induction heat is generated in the workpiece itself, so the heating is uniform, and the core table temperature difference is extremely small. The application of temperature control system can achieve precise temperature control to improve product quality and pass rate. Induction heating furnace has the advantages of small size, light weight, high efficiency, excellent thermal processing quality and favorable environment. It is rapidly eliminating coal-fired furnaces, gas furnaces, oil-fired furnaces and ordinary resistance furnaces. Tube-type electric furnaces are a new generation of metal heating equipment. .

The induction melting furnaces used in the industry have a crucible furnace (coreless induction furnace) and a melting furnace (core induction furnace), as shown in Fig. 2, the structure of the induction furnace body. Made of refractory or steel, the capacity ranges from a few kilograms to tens of tons. Its smelting characteristics are that the melt in the crucible is subjected to electric power, forcing the liquid level of the molten pool to bulge, and the melt flows from the center of the liquid surface to the periphery to cause circulating flow. This phenomenon is called electrokinetic effect and can make the melt composition uniform. The disadvantage is that the slag is biased to the periphery and the coverage is poor. Compared with the melting furnace, the furnace is flexible in operation and has a high melting temperature, but the power factor is low and the power consumption is high. The inductor of the furnace is composed of an iron core, an induction coil and a lining of a molten groove, and the molten groove is one or two strip-shaped annular grooves filled with a melt which is in communication with the molten pool. In principle, the grit furnace can be regarded as a core transformer with only one winding and short circuit in the secondary.

The induced current flows in the melt of the melt to achieve an electrothermal transition. In the production of high-temperature electric furnace, after the melting of each furnace metal, the molten pool cannot be emptied, otherwise it is easy to dry, and a part of the melt must be retained as the melt of the next furnace. The temperature of the molten ditch is higher than that of the molten pool and is subject to the erosion of the melt flow, so the lining of the molten ditch is easily damaged. For the convenience of maintenance, the inductor of the modern furnace is made into an assembly that is easy to replace. The capacity of the furnace is from a few hundred kilograms to more than one hundred tons. The grit furnace is used for power frequency. Since the iron core made of silicon steel sheet is used as a magnetic path, the electrical efficiency and power factor are high. The grit furnace is mainly used for the melting of cast iron, copper, zinc, brass, etc., and can also be used as a fusion melter for storing and heating the melt.