What issues should be paid attention to when inspecting a universal test machine

Universal testing machineFor general metal and non-metallic specimens, the jaws of the fixtures are in direct contact with the specimen. Generally, high-quality alloy structural steel, alloy high-carbon steel or low-carbon alloy steel, cold-work mold steel, etc. are used to increase their strength and wear resistance through appropriate heat treatment processes. Sometimes special steel is also installed at the jaws, or gold steel sand is sprayed on the surface of the jaws (suitable for clamping harder metal materials, such as steel strands, etc.).
For some fixtures with small test force, the surface in which they come into contact with the sample is made of soft rubber, such as: plastic film, fiber wire and other fixture clamping surfaces.
The specific clamps generally use high-quality medium-carbon steel and alloy structural steel to increase their mechanical properties through appropriate heat treatment processes. Sometimes, non-ferrous metals such as aluminum alloys and special metals are used in order to reduce weight. Sometimes cast structure cast steel, cast aluminum, etc. are also used.

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