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Question:

How about winding copper belt transformer for first contact?

How about winding copper belt transformer for first contact?

Answer:

The key is to ensure the process of milling, milling surface oxides and defects of hot rolled strip as knife, small flowers, inviscid cutting and scratching phenomenon, at the same time after milling uniform thickness.
The ingot is brittle at the medium temperature range of 200-300 DEG C, and the relevant studies show that it is caused by impurities, hydrogen or phosphorus. Because hydrogen and phosphorus are surface active elements, they are easy to adsorb on the grain boundaries of copper and cause medium temperature brittleness.In order to increase production efficiency. To reduce the loss of oxidation, ensure the normal rolling strip, the equipment condition permitting, transformer rolling production generally use the "high temperature, rapid, uniform, neutral or slightly reducing atmosphere conditions for hot rolling. The reheating of the ingot is usually carried out by a walking beam furnace, and the temperature of the furnace should be controlled at 850-920 degrees centigrade. The ingot temperature shall be uniform to prevent overheating or overheating. The hot rolling billet temperature is higher than 820 degrees, and the final rolling temperature is not less than 600 degrees centigrade. In order to avoid the "hydrogen embrittlement" and cause hot cracking, the atmosphere should be controlled in neutral or micro reduction atmosphere by adjusting the air-fuel ratio, combustion degree and furnace pressure.

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