How can silicon steel distinguish its material quality?
If it's a half finished core:1, suppliers should try to provide more core technical information, such as silicon steel sheet number, iron core weight, iron core size, core loss, etc..2. Check the appearance to see if it is standard and then verify that the data are consistent with the offer.3, finally, to test the core loss is around flexer.If it is the raw material of silicon steel sheet:1, I do not know its brand, and the thickness of more than 0.35mm. You'd better not. Because it is likely to be a motor silicon steel sheet, or a hot rolled silicon steel sheet.2, in the regular transformer manufacturing plant, there are special silicon steel sheet inspection equipment, generally there are large quantities of silicon steel sheet into the factory, (although there is a formal certificate), but also to test. So you'd better send it to the unit with this test to test its real performance.3, and other, using this material as a small core, to detect core loss, divided by the weight of the iron core, to obtain specific power consumption (W/kg), but also to determine his performance.
The H number is used, use -90 in 70s in Japan's Nippon Steel label. And now formal manufacturers are marked according to the new label.
The material and processing of silicon steel sheet depends on the quality of the silicon steel sheet, the most important processing technology of EI type silicon steel plate. It directly affects the quality of the transformer, the stamping method in machining process, the most important annealing method, making the performance of transformer silicon steel sheet stamping burr of the same material small and large burr difference 7%, silicon steel sheet back the same material (N2 annealing) and annealing the silicon steel sheet produced by the transformer performance difference 7-10%.
