Facilities

Quenching in liquid quenchants

For measuring and recording the quenching intensity when real workpeaces are quenched in any liquid quenchant (oils and water-based solutions).

Working range:
Temperature: 20 °C to 80 °C
Agitation rate: 0 to 1.4 m/s

A proprietary cylindrical probe of 50 mm Dia. x 200 mm, assembled with three thermocouples is used for calculation of the heat transfer coefficient.

Isothermal quenching in salt bath

Proprietary salt bath for investigation of isothermal quenching processes – Martempering and Austempering. Volume of the salt in the bath: 1 m3.

By the violent downward flow of liquid salt, very effective quenching intensity is achieved, which is enhanced by automatic addition of small quantities of water. This enables  to martemper workpieces of upto 150 mm cross – sections, and austemper workpieces of upto 30 mm thickness.

Working range:
Temperature: 180 °C to 450 °C
Agitation rate: 0 to 0.6 m/s
Water addition: 0 to 2 vol %

High pressure gas quenching

To simulate different parameters for high pressure gas quenching (HPGQ) in vacuum furnaces (different gases, pressures and flow velocities), a modified Jominy specimen (20 mm Dia. x 100 mm) is heated by induction and cooled in this facility under controlled conditions. Relevant heat transfer coefficients can be calculated.
This unique facility is also used for establishing hardenability curves of steels, when gas quenched under specified conditions; an investigation initiated by the German Institute: Institut für Werkstofftechnik (IWT), the University of Bremen.

Working range:
Gases: Nitrogen, Argon, Helium
Pressures: up to 20 bar
Flow velocity: up to 70 m/s

Measuring of cooling curve by acquisition system according to ISO 9950.

Temperature Gradient System for Quenching Analysis when real workpieces are involved.