Description
In electric heating element industry, the main material of heat resistant electrical wire is iron chromium aluminum, nichrome resistance wire. Fe-cr-al and ni-Cr-al electrothermal alloys generally have strong oxidation resistance. In the process of production of heat resistant wire for oven, is often damage because when in forging furnace to produce contains various gases, like air, the atmosphere of carbon, sulfur, hydrogen and nitrogen atmosphere, atmosphere that gas under high temperature using the element has a certain influence, although all kinds of electric heating alloy oxidation process were carried out before leaving the factory, But in transportation, winding, installation and other links will cause component damage to a certain extent, and reduce the service life.
In order to better prolong the service life of the resistive heating wire, pre-oxidation treatment is carried out before the customer uses it. The method is to heat the electric heating alloy element installed in dry air to 100-200 degrees lower than the maximum allowable temperature of the alloy, keep it warm for 5-10 hours, and then slowly cool with the furnace. The advantage of doing this is to make the life of the heating wire longer.
This type is one of the most widely used materials for heating elements due to its ductility, high resistivity, and oxidation resistance even at high temperatures. The most common composition of nickel-chromium alloys is 80/20 or 80% nickel, 20% chromium. Other compositions are available depending on the manufacturer. Due to its high ductility, it is usually drawn into wires when used as a heating element. A common application that exhibits this property is on hot-wire foam cutters. Maximum heating temperatures achieved by nickel-chromium wires are around 1,100 to 1,200°C.
We specializd in Ferro-Chrome (Fe-Cr-AL) heat resistant electrical wire ,8020 ni cr heating wire , Copper Nickel (Constantan) wire, and related products in alloys to meet specific customer requirements.
The high temperature strength of 8020 ni cr heating wire is higher than that of fe-Cr-Al, and it is not easy to deform when used at high temperature.Nickel-chromium alloy does not become brittle after cooling down for a long time, so the heating element is more reliable to use and easy to repair after damage.
Application
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