Furnaces for Annealing Under Protective Atmosphere by Therelek

The annealing process is the heating of a material to a predetermined temperature for a while and then slowly cooling to the room temperature. The metal quality is high when the material is held for a longer time at the predetermined temperature and then cooled to room temperature.

Since the process is carried at subcritical temperature, the cooling rate is most important. Annealing is carried out to relieve internal stresses due to solidification, forging, machining, rolling and welding. It is also done to restore toughness and ductility. Applications of annealing include treatment of sheets and wires.

Castings in the as-cast condition are annealed to relieve internal stresses and reduce growth. Although annealing does not generally produce any extensive changes in mechanical properties, certain alloys may show slightly reduced tensile strength, while ductility may increase.

The usual annealing treatment consists of heating the material at a temperature of 350oC for about 2hours. However, another less common method of annealing involves heating the castings up to their solution temperature for a short period, followed by furnace cooling to room temperature.

Furnaces for Annealing Under Protective Atmosphere by Therelek

Pit Type High Temperature Furnace

Pit type sealed retort furnaces are of a cylindrical design vertically erected with a positive sealing mechanism on top in order to contain and preserve heat and atmosphere during a process cycle.

Pit Type High Temperature Furnace

Horizontal Vacuum Furnace

Our Horizontal Vacuum Furnace has cold wall construction with metallic/graphite hot zone. The door swivels sideward and the material is loaded from the front.

Horizontal Vacuum Furnace

Vertical Vacuum Furnace

Therelek’s Bell furnace is designed with optimal performance for high sensitivity and delicate components.

Vertical Vacuum Furnace

Sealed Quench Furnace

Therelek’s Sealed Quench Furnace line consists of preheating and tempering furnaces, washing machines, stationary table, hydraulic lifts and charge transfer systems

Sealed Quench Furnace (SQF)

Continuous Mesh Belt Furnace

A multi-zone control environment is present in a continuous high-temperature furnace, often with a single pre-heating zone,

Continuous Mesh Belt Furnace

Chamber Furnace

Therelek’s chamber furnace can operate up to 1800°C. These furnaces are usually rugged, refractory based construction

Chamber Furnace

Bogie Hearth Furnace

Our standard bogie hearth furnace goes up to 1500°C, however, we make custom designed furnaces for any special requirements

Bogie Hearth Furnace

Bell Jar Furnace

Therelek’s Bell furnace is designed with optimal performance for high sensitivity and delicate components.

Bell Jar Furnace

Bell Annealing Furnace

Bell Annealer brings in excellent temperature uniformity, consistent quality and good production rates.

Bell Annealing Furnace

Continuous Air Circulation Furnace

Continuous air circulation furnace is usually multi-zone controlled for better process control. Individual zones can have preset temperature controls for best process results.

Continuous Air Circulation Furnace

Continuous Roller Hearth Furnace

Roller hearth furnaces are designed for continuous production and easy maintenance to handle large size and weights.

Continuous Roller Hearth Furnace

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