High-temperature industrial core: materials and application analysis of radiation tube castings

1. Uses of furnace radiation tube castings
Furnace radiation tube castings are mainly used in industrial heat treatment furnaces, petrochemical heating furnaces and other equipment. Its main functions include:
Provide a stable heat source: The surface of the radiation tube casting can radiate heat evenly, so that the materials in the furnace are fully heated.
Energy saving and efficiency improvement: The casting design transfers heat through radiation, avoids heat loss caused by direct combustion, and improves fuel utilization efficiency.
Environmental isolation: The radiation tube isolates the flame from the heated material to avoid pollution and oxidation caused by direct contact.

2. Materials of furnace radiation tube castings
The commonly used materials for furnace radiation tube castings are heat-resistant steel or high-temperature alloys. These materials have the characteristics of high strength, high hardness and corrosion resistance, and are suitable for use under high temperature conditions. Common materials include:
High nickel alloy: contains a high nickel element, can withstand high temperatures, and has good oxidation resistance.
High chromium alloy: contains more chromium elements, so that the material has good corrosion and oxidation resistance, suitable for harsh environments.
Titanium alloy or special ceramics: used under special conditions, such as high-temperature vacuum furnaces, these materials provide excellent resistance to thermal shock and corrosion.

3. Manufacturing process of furnace radiation tube castings
The manufacturing process of furnace radiation tube castings usually includes the following steps:
Mold making: First, it is formed by sand mold or metal mold. According to design requirements, gravity casting, centrifugal casting or precision casting can be used.
Melting and casting: After the alloy material is melted, it is injected into the mold to ensure that the metal liquid is evenly distributed to ensure the density and strength of the casting.
Heat treatment: After the casting is cooled and formed, heat treatment is usually required to eliminate internal stress and improve its resistance to thermal shock.
Surface treatment: Finishing and polishing of the finished casting to remove surface defects to ensure that thermal stress concentration will not be generated due to surface defects during use.

4. Advantages of furnace radiation tube castings
High temperature stability: It can maintain shape and strength in a high temperature environment above 800-1200 degrees Celsius, and is not easy to deform and crack.
Anti-oxidation and anti-corrosion: The materials used have good anti-oxidation properties, which avoids the service life affected by oxidation at high temperatures.
High heat transfer efficiency: Through design optimization, the heat conduction of the radiant tube is more efficient and heat energy loss is avoided.
Strong adaptability: Suitable for use in different types of heating equipment, including metal heat treatment furnaces, petrochemical industrial furnaces, etc.

5. Application Cases
Furnace radiant tube castings are widely used in many fields, especially in high-temperature treatment processes that require precise temperature control:
Metal heat treatment: In heat treatment processes such as metal quenching and annealing, radiant tube castings can ensure uniform heating and improve the mechanical properties of processed parts.
Petrochemical: In reactions such as catalytic cracking, radiant tube castings provide a stable heat source to ensure stable chemical reactions.
Glass and ceramic industries: In the high-temperature firing processes of these industries, radiant tube castings can maintain uniform heating and avoid the generation of internal stress in the product.