Device for cryogenics and heating of reduced-scale test specimens for charpy testing

A TEST METHOD using the cryogenic and heating device for reduced-scale specimens as described in the preceding claims, characterized in that it is carried out using a proprietary computer program written in the Python programming language (Py), following the steps below:

• a) defining the temperature parameters desired by the operator/user, to configure the cryogenics or heating process through the system (16) with a logic controller connected to thermal sensors (15);
• b) manually placing the test specimen (13) into the container (10) and inserting it into the chamber (1);
• c) triggering the corresponding process through the application, which is the delivery of cooling gas for the cryogenic loading process, which enters the hydraulic connection (7) and circulates through the channels (11) and recirculators (3) and (4) and exits through the hydraulic connection (8);
• or the electrical actuation of the resistor (9) mounted on the channels (12) for the heating process;
• d) in the instance of actuation of the cryogenics process, the application controls the purging of an inert gas into the chamber (1) by means of the Festo-type quick-connect fitting (6) to prevent thawing from forming on the test specimen (13);
• e) the application monitors processes, whether cryogenics or heating processes, using thermal sensors responsible for defining and holding the target temperature defined by the user;
• f) upon reaching the target temperature, and holding for 5 seconds, the test specimen (13) is removed from the chamber and placed on the Charpy machine stop, where it is subjected to the impact test;
• g) the application holds the target temperature in the chamber or it can be restarted to receive new settings;
• it is necessary to wait about 30 minutes for the cryogenics and heating device to return to room temperature. If there are no more tests to be carried out, the application shuts down the system.