The DIL805 Series comprises of four models: DIL 805L, DIL 805A are quenching dilatometers, DIL 805A/D is a quenching with the capability to deform the specimen by compression, and DIL 805A/D/T that can also stretch it in tension mode.
All four instruments are fully automated, self-contained units used to measure dimensional changes under extreme conditions of controlled heating and cooling.
In the quenching mode the sample, solid or hollow, is inductively heated to a temperature plateau and is then cooled at an user-defined (linear or exponential) cooling rate. The phase transformation occurring in the continous cooling process or in the isothermal dwell, with or without compression/tensile stress, is indicated by the measured change in length. An array of cooling or isothermal curves represents a continous-cooling-transformation (CCT) diagram or an isothermal time-temperature-transformation (TTT) diagram, respectively. DIL 805A represents today the benchmark for determining these dimensional changes and phase transitions. Operating from -160°C up to 1500°C (in two different furnace configurations) with heating rates of up to 4000°C/s and cooling rates of 2500°C/s, can closely simulate the material response for any production or heat treatment process.
The DIL 805A/D, on top of the quenching mode, is distinguished by its capability to deform the specimen with controlled deformation rates of of 0.01 to 200 mm/s. Used to optimize steel processes like hot or cold rolling, DIL 805A/D allows to develop time-temperature-transformation diagrams after deformation (DTTT) and is also used to examine creep and relaxation processes.