How to choose the right graphite powder
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How to choose the right graphite powder
First, the inherent resistivity of the data
On the same uniform size data, the resistivity of small data, its strength and hardness will be slightly lower than the corresponding high resistivity data. Namely the discharge speed, the loss will be different.
Two, the data of shore hardness
In the subconscious mind of graphite, graphite is generally considered to be a soft material. However, the practice of testing data and the use of the state, graphite hardness than metal data.
Three, the bending strength of the data
The flexural strength of data is the direct manifestation of data intensity, showing the tight degree of internal structure of data. High strength data, its discharge loss resistance function is relatively good, on the request of high precision electrode, try to select better strength data
Four, uniform particle diameter
The uniform particle diameter of the data directly affects the discharge status of the data. The smaller the uniform particles, the more uniform the discharge, the more stable the discharge condition, the better the appearance quality. About the appearance, precision casting, the request is not high casting mould, general introduced the use of coarse grain materials, such as ISEM-3; electronic mold of high precision, appearance request, recommending the use of uniform particle size of 4 m the following information, to ensure the machining accuracy of the mold, surface smoothness. The smaller the uniform particles, the smaller the loss of data, the greater the force between the ions.
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