Experiment of Electrical Fire Burned Copper Wire and Parameters Analysis on Metallographic Test of Melted Mark

Heat treatment experimental simulation of the actual situation of the electrical fire melted mark was carried out; the metallograph of copper wire after heating was obtained, and verified with the actual case. And then using digital image processing software to grain size, that in a certain temperature range, the relation between average size and heated temperature was curve; particle size increases with the increase of heating time; water cooling, air cooling, furnace cooling conditions, the grain increases by followed.