Therser UK Blog

What is a Seal Quench Furnace

A Seal Quench Furnace, also known as a Sealed Quench Furnace, is a type of heat-treating furnace commonly used in the manufacturing and processing of various metal components. It is primarily employed for the heat treatment of steel parts to achieve desired mechanical properties and enhance their performance.

The main feature of a Seal Quench Furnace is its ability to rapidly cool the heated metal parts in a controlled manner, known as quenching. The furnace is designed with a sealed chamber or retort where the parts are placed for heat treatment.

Seal Quench Furnace

The typical operation of a Seal Quench Furnace involves the following steps:

  1. Loading: The metal parts to be heat-treated are loaded into the sealed chamber or retort of the furnace. The retort is typically made of a heat-resistant material, such as stainless steel, and is sealed to prevent the entry of air or other gases during the process.

  2. Heating: The furnace is heated to the desired temperature required for the heat treatment process. This temperature is often above the transformation temperature of the steel, enabling the desired metallurgical changes to occur.

  3. Soaking: Once the desired temperature is reached, the metal parts are held at that temperature for a specific period. This soaking time allows for uniform heating and the completion of desired transformations within the steel.

  4. Quenching: After the soaking period, the retort containing the metal parts is rapidly transferred to a quenching chamber. In the quenching chamber, the parts are exposed to a quenching medium, such as oil, polymer, or water. This rapid quenching process rapidly cools the parts, resulting in the desired material properties, such as hardness or toughness.

  5. Tempering (Optional): In some cases, after quenching, the parts may undergo a tempering process. Tempering involves reheating the parts to a lower temperature to reduce excessive hardness and improve toughness, ductility, and dimensional stability.

The use of a sealed chamber in Seal Quench Furnaces allows for controlled quenching and minimizes the risk of distortion or cracking in the heat-treated parts. The quenching medium can be selected based on the desired properties and the specific requirements of the components being processed.

Seal Quench Furnaces are widely utilized in various industries, including automotive, aerospace, tooling, and general manufacturing, where heat treatment of metal components is necessary to achieve specific material properties and performance characteristics.

You can also follow this link to our free guide database.


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