What is the annealing temperature for transformer silicon steel sheets
The generation of qualified thinner silicon steel sheet iron cores requires certain equipment and processes. The temperature of thinner silicon steel sheet iron cores during annealing should not be too high or excessive, as excessive temperature can affect the insulation coating or cause laminated bonding. Generally, the temperature of oriented silicon steel sheets is around 800 degrees, and the annealing temperature of non oriented silicon steel sheets is around 700 degrees. During annealing, the furnace maintenance atmosphere should be strictly controlled to be a non oxidizing atmosphere.
The principle of selecting thinner silicon steel sheets for iron core stamping is to prevent oxidation and carburizing, and to ensure that the insulation coating on the outer surface of electrical steel strips (silicon steel sheets) does not significantly deteriorate. Select a hydrogen nitrogen mixture gas containing 2-10% hydrogen. Participating in a small amount of hydrogen can ensure that the iron core stamping does not oxidize. The dew point in the maintenance gas should generally be below 0 ℃.
Thinner silicon steel sheet iron cores will be used in transformers and transformers operating in the frequency range of 400Hz~30KHz. For a long time, thinner silicon steel sheet iron cores have been widely used in radar pulse transformers, high-frequency medical X-ray power supplies, and linear accelerator modulation power supplies, as well as in dust removal and water treatment power supplies.
Thinner silicon steel sheet iron cores have higher magnetic induction intensity, larger output power, and smaller volume; The high-frequency loss is very low, and the operating power consumption of the iron core below high frequency is relatively small, and the temperature rise is also very low. The incision can remain flat without any slag falling off, and the no-load current is also relatively small.
For thinner silicon steel sheet cores used in transformers, 0.35mm thick cold-rolled silicon steel sheets are generally chosen. According to the required size of the thinner silicon steel sheet core, it is cut into long pieces and then overlapped to form a "Japanese" or "mouth" shape.
Article source: Transformer silicon steel sheethttp://www.cheungshun.com/
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