High Temperature Durability Steel Frame Castings: Properties, Processes and Applications

Characteristics of heat-resistant steel frame castings
Heat-resistant steel material frame casting is a structural component formed through a casting process using heat-resistant steel as the main material. It has the following salient features:

High temperature resistance: Heat-resistant steel materials contain a high proportion of chromium, nickel and other elements, allowing castings to maintain strength and stability in high-temperature environments. Generally, this type of material can withstand high temperatures above 600°C, and some special alloy steels can reach temperatures above 1000°C.

Anti-oxidation and corrosion resistance: In high-temperature environments, steel is easily oxidized or corroded, affecting its service life. Heat-resistant steel materials form a protective oxide film on the surface by adding alloy elements such as chromium, aluminum, and titanium to enhance the oxidation resistance. In addition, it can effectively resist corrosion by chemicals such as acids and alkalis.

Good mechanical properties: Heat-resistant steel materials still maintain good strength, toughness and hardness in high-temperature environments, and can withstand mechanical stress and thermal stress. These properties enable heat-resistant steel frame castings to have long-term stable mechanical properties in high-temperature environments.

Production process
The manufacturing process of heat-resistant steel frame castings is relatively complex and mainly includes the following steps:

Material selection: Use high-chromium and high-nickel heat-resistant steel as the basic material to ensure the performance of the casting in high-temperature environments.

Smelting: Heat-resistant steel needs to be smelted at high temperatures to ensure full fusion and even distribution of elements. During this process, a certain proportion of molybdenum, titanium and other elements need to be added to improve the oxidation resistance and corrosion resistance.

Casting: The smelted molten steel needs to be cast in an appropriate mold. In order to reduce casting defects and improve the density and surface finish of castings, processes such as precision casting or sand casting are usually used.

Heat treatment: Heat treatment processes such as quenching and tempering are used to optimize the structural structure of castings and improve the toughness and hardness of the material. In addition, some castings may require surface treatment to enhance their resistance to oxidation and corrosion.

Application areas
Due to the excellent high temperature resistance and corrosion resistance of heat-resistant steel frame castings, they have been widely used in many high-temperature and harsh environments, mainly including the following fields:

Petrochemical industry: In the cracking units and reactors of the petrochemical industry, heat-resistant steel castings are used to manufacture high-temperature and corrosion-resistant frames and pipes to ensure the safe operation of the system.

Electric power industry: Boilers, steam turbines and other equipment in power plants need to be exposed to high temperature and high pressure environments for a long time. Heat-resistant steel frame castings are used as support structures for these equipment to improve their heat resistance and lifespan.

Metallurgical industry: In high-temperature furnaces and rolling mill equipment in the metallurgical industry, heat-resistant steel frame castings are used to support and connect various important components to withstand high temperatures and thermal stress.

Aerospace: In engines and high-temperature piping systems in the aerospace field, heat-resistant steel materials can ensure the performance stability of the equipment in harsh environments.

Heat Treatment Material Frame Castings