In order to maximize the stability and efficiency of the electric furnace wire in the equipment. Before purchasing electric furnace wires on the market, it is necessary to consider the working requirements of the equipment and environmental factors and then make a decision to choose nickel-chromium electric furnace wires or iron-chromium-aluminum electric furnace wires, because electric furnace wires of different alloys are used in a wide range of applications. It's huge, so it needs to be differentiated. Only in this way can it be more stable and efficient.
The characteristics of nickel-chromium electric stove wire are:
1. High strength under high temperature;
2. Cool down after long-term use, the material will not become brittle;
3. The emissivity of fully oxidized nickel-ming alloy is higher than that of iron-chromium-aluminum alloy;
4. Non-magnetic;
5. In addition to sulfur atmosphere, it has better corrosion resistance.
The characteristics of iron-chromium-aluminum electric furnace wire electric heating alloy materials are:
1. The use temperature is high, for example, the maximum use temperature of HRE iron-chromium-aluminum alloy wire in the atmosphere can reach 1400℃;
2. Long service life;
3. The allowable surface load is large;
4. Good oxidation resistance, AI2O3 film formed after oxidation has good chemical resistance and high resistivity;
5. The specific gravity is less than that of nickel-chromium alloy;
6. High resistivity;
7. Good sulfur resistance;
8. The price is significantly lower than that of nickel-chromium alloys;
9. The disadvantage is that as the temperature increases, the performance is plastic, and the strength at high temperatures is low.
The characteristics of nickel-chromium electric stove wire and iron-chromium-aluminum electric stove wire are described above. Electric stove wire has good elasticity, high resistivity, still good strength when heating, it is not easy to oxidize under high temperature conditions, and the price is low. However, the alloy electric furnace wire itself is at a very high temperature (hot state) in the working state, and it is easy to oxidize and burn out in the air. From the perspective of electrothermal energy conversion, the energy is lost due to the generation of visible light; electric furnace wire It is often used in a spiral state, and will produce inductive reactance when energized. The iron-chromium-aluminum high-resistance electric heating alloy has the characteristics of high resistivity, low temperature coefficient of resistance, and high operating temperature. It has good corrosion resistance at high temperatures, and is especially suitable for use in an atmosphere containing sulfur and sulfide, and is low in price. It is an ideal heating material for industrial electric furnaces, household appliances, and far-infrared devices.
In the heating process of the electric furnace wire, what kind of calculation or operation should be used to ensure that the electric furnace wire is safe during the heating process of the equipment. Through learning and experience, the resistance value and power of the resistance wire are the most important conditions. According to the formula Ohm's law, I=V/R and P=I*V can be calculated respectively to calculate the resistance and power of the electric furnace wire.
In the actual heating process, it will be found that the resistance wire is too thin (low power, high resistance), it will burn the resistance wire; the resistance wire is very thick, (high power, low resistance), it will burn the wire, and cause the insurance to jump. Power off. In the actual application process, it can work according to the standard range heating according to the Ohm's law formula and according to the correct connection method. As for whether to connect other things to the electric stove wire, the main consideration is the resistance and power of the electric stove wire. Of course, the series capacitor or the step-down resistor may be connected to a non-isolated power supply during the working process. Therefore, electric shock and other faults must be considered during the use process.
