Effect of low temperature test chamber on materials

Low temperatures have an adverse effect on almost all matrix materials. For equipment exposed to low temperatures, low temperatures can change the physical properties of its constituent materials, which may cause temporary or permanent damage to its performance. Therefore, as long as the equipment is exposed to temperatures below the standard atmospheric conditions, it is necessary to consider the low temperature test - related equipment low temperature test chamber. Consider the following typical low temperature environmental effects to help determine if the test is suitable for the test equipment:

a) the material is hardened and embrittled;

b) in the response to temperature transients, different materials produce different degrees of shrinkage, and the expansion ratio of different parts is different, causing parts to bite each other;

c) the lubricating effect and fluidity of the lubricating oil are lowered due to the increase in viscosity;

d) performance changes of electronic devices (resistors, capacitors, etc.);

e) performance changes of transformers and electromechanical components;

f) the rigidity of the vibration damping frame is increased;

g) a solid explosive pill or a drug column (such as ammonium nitrate) produces cracks;

h) rupture and cracking, brittle fracture, impact strength change and strength reduction;

i) the constrained glass produces static fatigue;

j) condensation and freezing of water;

k) operator flexibility in wearing protective clothing, hearing and vision loss;

l) Change in burning rate.

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