What Should Be Paid Attention To Resistance Wire In The Cartridge Heaters?
At present, the demand of cartridge heaters is getting larger and larger, but many customers do not know that the single-head electric heating tubes are composed of several ones. The single-head electric heating tubes are made of resistance wires, wall tubes, magnesium oxide powder, Magnesium powder bones and terminals are somewhat composed, but what should be paid attention to during use? What should be paid attention to when using the resistance wire in a single-head electric heating tube?
The structure of the single-head electric heating tube is a high-temperature magnesium oxide rod in which a heating wire is placed in a metal tube and is tightly packed with excellent thermal conductivity and insulation in the vacancy. The two ends of the heating wire are connected to the power supply through two extraction rods. The structure has a simple structure, a long life, high thermal efficiency, good mechanical strength, and can be bent into various shapes for safety and other benefits. 1. The highest operating temperature of the component refers to the surface temperature of the component itself in monotonous air. It does not refer to the temperature of the furnace or the object being heated. Under normal circumstances, the surface temperature is higher than the furnace temperature by 100 degrees. Therefore, considering the above reasons, it is planned. When using the component, pay attention to its operating temperature. When the temperature exceeds the inevitable limit, the oxidation of the component itself is accelerated, and the heat resistance is lowered. Especially the iron-chromium-aluminum electrothermal alloy component is easily deformed, smashed, and even cracked, and shortened. Lifespan. 2. The highest operating temperature of the component and the component wire diameter are also properly contacted. Under normal circumstances, the maximum operating temperature of the component should be no less than 3mm and the thickness of the flat ribbon should be no less than 2mm. 3. Corrosive air in the furnace is also in proper contact with the maximum operating temperature of the component, and the operating temperature and service life of the component are generally affected by the presence of corrosive air. 4, iron chrome aluminum, nickel aluminum and other series of electrothermal alloys due to their different chemical composition, its application temperature, antioxidant function and resistivity are different, and then choose the temperature and the length of life, in the iron chrome aluminum The composition of the resistivity in the electrothermal alloy material is AL element, and the composition of the nickel-chromium electrothermal alloy material is determined to be Ni element. At high temperatures, the oxide film formed on the surface of the alloy component is also aging and damaged.
