What is an Atmosphere Furnace?

An atmosphere furnace is a heat treatment device capable of heating under specific atmospheric conditions. It typically evolves from a box furnace combined with an atmosphere control system. However, with the advancement of electric furnace technology, many furnaces can now introduce protective gases, such as tube furnaces and vacuum furnaces. Generally, any furnace that requires the introduction of gases can be called an atmosphere furnace.

The primary design purpose of an atmosphere furnace is to control the composition of the atmosphere inside the furnace, thereby preventing unnecessary reactions between the material and oxygen, moisture, or other components in the air during the heating process. This equipment is widely used in aerospace, automotive manufacturing, electronics, and metal materials industries. Introducing different gases can prevent oxidation, reduce oxide layers, modify surfaces, and control atmospheric composition, among other effects.

What Gases Can Be Introduced into an Atmosphere Furnace?

Atmosphere furnaces can introduce a variety of gases, commonly including:

1. Nitrogen (N₂): Ammonia is introduced into the atmosphere furnace to provide an inert environment to prevent material oxidation.

2. Hydrogen (H₂): Has reducing properties that can prevent and remove oxide layers from materials.

3. Argon (Ar): A widely used inert gas for oxidation prevention and material protection.

4. Ammonia (NH₃): Used for nitriding processes to enhance material hardness and wear resistance.

5. Carbon Monoxide (CO) and Carbon Dioxide (CO₂): Used to control carbon potential, adjusting the surface carbon content of materials.

Why is Gas Introduced into the Furnace?

Materials treated in furnaces are often diverse, especially those prone to chemical reactions with the external environment. These materials need protection, and gases are introduced into the furnace to shield them from unwanted reactions. The purposes of introducing gases include:

1. Preventing Oxidation: The atmosphere furnace can prevent the material from contacting with oxygen in the air by introducing inert gases (such as nitrogen and argon), thereby avoiding oxidation.

2. Reducing Oxide Layers: Reducing gases like hydrogen can remove oxide layers from material surfaces.

3. Surface Modification: Active gases like ammonia can modify material surfaces, such as nitriding or carburizing.

4. Controlling Atmospheric Composition: Gases like carbon monoxide and carbon dioxide control the atmosphere inside the furnace to adjust the surface carbon content of materials.

What Materials Can Atmosphere Furnace Process?

Atmosphere furnaces can handle a variety of materials, including:

1. Metal Materials: Such as steel, aluminum, and titanium, controlled atmosphere furnaces enable processes like annealing, quenching, and tempering, improving mechanical properties and surface quality.

2. Ceramic Materials: Used for sintering and post-sintering treatments, specific atmospheres prevent oxidation and degradation at high temperatures.

3. Composite Materials: Such as carbon fiber composites. High-temperature treatments enhance strength and heat resistance.

4. Semiconductor Materials: Such as silicon wafers. Atmosphere furnaces are used for diffusion and oxidation processes in manufacturing high-performance electronic components.

5. Powder Metallurgy Materials: Controlled atmospheres prevent oxidation during sintering, increasing the density and mechanical properties of the final product.

Brother Furnace's Atmosphere Furnaces

As a leading manufacturer of heat treatment equipment, Brother Furnace offers various types of atmosphere furnaces suitable for different industrial applications. Some of their atmosphere furnaces include:

Chamber Atmosphere Furnace	External Heating Atmosphere Furnaces	Atmosphere Hot Press Furnace

Conclusion

As an essential heat treatment equipment, the atmosphere furnace performs heating processes under specific atmospheric conditions, effectively controlling surface reactions and enhancing material properties. Introducing different atmospheres can prevent oxidation, reduce oxide layers, modify surfaces, and control atmospheric composition. Brother Furnace's atmosphere furnace has become an important tool for industrial heat treatment with its advanced design and wide range of applications. The operating temperature is usually between 0-1800 degrees Celsius, and the control accuracy is ±1℃。

For more information about our atmosphere furnaces, feel free to contact us.