Shear of Metallographic Specimen of Tungsten Contacts Materials

Shear of metallographic specimen of tungsten contacts materials can not be arbitrarily taken, it should be in accordance with the relevant technical standards required for the implementation of the materials, such as, specimen site, amounts, data and other factors should represent the interior of the materials properties and its internal aspects of its biggest change since shearing representative and appropriate contacts materials specimen is an important step of metallurgical analysis, if you ignore the importance of this step, the test results will affect the reliability of contacts material and accuracy. Furthermore, the specimen site, direction and other factors with different research purposes should also be different.

Because the surface of the tungsten contacts materials will attach to a layer of metal or unevenly distributed layer component segregation area due to the properties of the production process, so contacts materials specimen site is:

1. Ingots. At the end of the ingots, the shear of ingots should a cross-section which is perpendicular to the die wall;
2. Wire (line) or strip. The Shear of longitudinal section and cross-section at its two ends is needed;
3. Sheet or plate. Shearing its cross-section is needed.



 

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