The Experiment on Melted Mark Formed by Copper Wire in Electrical Fire and the Analytic Researcher on the Feature Parameters of Metallographic Structure.

This essay based on a series experiments simulated the real electrical fire situation to get the metallographic structure pictures of heated copper wire. The results of the experiment are proved by the real cases. A digital image processing software is adopted to quantitative the demotion of the metal crystals. The findings is that the average diameter of metal crystals changes with temperature varied. The relation between the diameter and the environment temperature can describe with a curve. The high the temperature the diameter of the crystal is bigger. The diameter is also determine by melted mark cooling method