Luoyang HongtengIntermediate frequency induction furnace
Since the establishment of the company, Hongteng has been committed to serving users around the world, so we have many production lines under construction and put into production all over the world. Today, the editor of Hongteng summarized some quality control problems in the smelting process when the electric furnace is at work, and would like to share it with you. Heat preservation of molten iron: The heat preservation of molten iron at high temperature will cause temperature changes, element burning loss, dissolved gas and changes in the state of the molten iron itself. Therefore, if long-term heat preservation is required, the temperature of heat preservation should be reduced as much as possible. For example, a small amount of clean and dry return material can be added to cool down, and the surface of molten iron can be covered with slag made of glass and other materials. Selection of molten iron composition: When several castings are to be cast in the same molten iron, the largest batch of castings or the most important castings should be batched as much as possible. During the process of pouring molten steel, the carbon content in the furnace will continue to decrease. , you...
The biggest feature of induction furnace heating is that the workpiece can be directly heated, the workpiece heating speed is fast, the temperature is easy to control, and no metal impurities are mixed in the heating process, so it has a wide range of applications. The most common applications of induction furnaces are in the machinery manufacturing industry and metallurgical industry, so what are the specific uses of induction furnaces? Red Teng editor to introduce to you. Quenching: heating the workpiece to a certain temperature and then cooling it down quickly, so that the metallographic structure of the workpiece is changed to a certain extent, thereby increasing the hardness and wear resistance of the workpiece, which is called quenching. However, after the workpiece is quenched, it will become very brittle and the fatigue resistance will deteriorate. In order to solve this contradiction, there is a surface quenching process. Induction heating is the most ideal heating method for surface hardening, which can meet the surface hardening requirements of the workpiece by controlling the heating depth and heating time. Diathermy: During the heating process, the internal and surface temperatures of the entire workpiece are approximately equal, which is called diathermy. The advantages...
In the heat treatment industry, carbon content will have a great impact on various properties of metals. Commonly used charge in smelting are pig iron, scrap steel and return charge. Pig iron has a high carbon content, but the purchase price is also relatively high. Therefore, the most commonly used material for smelting is scrap steel, which can reduce the cost of castings. If scrap steel is used as raw material, in the process of smelting metal in the electric furnace, due to inappropriate ingredients, insufficient charging and excessive smelting decarburization, sometimes the carbon content in the steel does not meet the requirements of the top stage. At this time, it is necessary to add carbon to the molten steel, and the best way is to use a carburizer. There are many materials that can be used as cast iron recarburizers, commonly used are artificial graphite, calcined petroleum coke, natural graphite, coke, anthracite and mixtures made of such materials. Steel-making recarburizers can be used in different processes such as casting, cast iron, and cast steel. However, recarburizers are suitable for smelting in induction furnaces, but their specific uses vary according to process requirements. When using recarburizer in intermediate frequency electric...
In the previous article “About the selection and use of electric furnace and graphite crucible“, we introduced the crucible, and today we will continue this topic. There are many basic properties of crucibles, such as corrosion resistance, heat resistance, thermal stability and so on. In order to exert these properties, it is necessary to use the crucible with regular operation. Today, Hongteng editor will introduce the precautions for the use of the crucible. First of all, no matter what kind of crucible is, it is not as strong as metal, so we should pay attention when using it, handle it with care, and avoid the crucible from being hit or dropped, which may cause damage to the crucible. In normal times, we should store the crucible in a dry place to avoid moisture or water. Because moisture may react with the substances in the crucible under certain conditions, it will affect the heating effect and cause a large deviation in the performance of the crucible. When the new furnace is used for the first time, the temperature is raised to the operating temperature at a rate of 200 degrees per hour, and then maintained at the operating temperature for a...
Regarding the rebar production line, the manufacturing process is as follows: The steel is melted into molten iron in professional equipment, and then poured into a cast iron mold to form a billet. The slab is heated by various heating furnaces, and after passing through the continuous casting machine and continuous rolling mill, it becomes a new steel bar. The electric furnace,furnace and induction furnace that we have been introducing to you can be regarded as a kind of equipment, that is, a heating furnace specially used to melt molten iron. The principle of heating is to use the intermediate frequency magnetic field eddy current to melt various steel materials. The editor of Collective Red Teng will introduce the characteristics of this furnace to you. The principle of intermediate frequency induction heating is electromagnetic induction, and its heat is generated in the workpiece itself. Ordinary workers can carry out the continuous work of the forging task ten minutes after going to work with the intermediate frequency electric furnace, and there is no need for furnace workers to burn and seal the furnace in advance. Using the principle of electromagnetic induction heating, the heating speed is fast, so the oxidation of...
Induction furnaces can be used in smelting, heat preservation and heat treatment of various metals. The intermediate frequency furnace power supply, as the supporting equipment of the induction furnace, is a frequency conversion device that converts the three-phase power frequency power supply into a single-phase power supply. It has developed from an early intermediate frequency generator set into a thyristor type variable frequency power supply. Later, through continuous development and improvement, it has become a new variable frequency power supply with strong load adaptability and wide application range by virtue of its advantages of fast heating speed and uniform heating. device. The main structure of the intermediate frequency power supply is: rectifier transformer, thyristor rectifier, freewheeling diode, inverter, connecting rectifier, reactor, and corresponding control loop and protection loop. The intermediate frequency power supply equipment has continuous mode and timing fixed power mode, which can be freely set according to the work needs. Before each start of the inverter, the equipment status will be automatically detected. If there are various states that do not meet the startup status, the inverter will automatically display a fault. point, and block the inverter to reduce the risk of accidents. The operation of the intermediate...
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