The maximum service temperature of a heat-resistant casting is a parameter that is limited by many factors. These factors include the chemical composition of heat-resistant steel castings, the shape and size of heat-resistant steel castings, environmental conditions of use, and surface power loads. Therefore, these factors must be taken into consideration when determining the maximum use temperature of the electric heating element, and the balance is comprehensively analyzed and determined.
The influence of chemical composition, the influence of the composition of heat-resistant steel castings on the maximum use temperature is mainly reflected in the high temperature strength, oxidation resistance and corrosion resistance of heat-resistant steel castings. These factors have a direct impact on the maximum use temperature.
The influence of size and size, first of all, when heat-resistant steel castings work at high temperatures, they must be able to withstand the deformation caused by their own weight. Second, the relative oxidation rates of materials of different sizes are different.
The influence of the working environment, the heat-resistant steel castings will react physicochemically with the components in the environmental medium at high temperatures, and the surface of the casting will be eroded, thereby reducing its service life.