Production method of non-oriented silicon steel for extra-large generator and insulating coating of non-oriented silicon steel for extra-large generator

Abstract

The invention discloses a production method of non-oriented silicon steel for an extra-large generator. The production method comprises a strip steel cleaning process, and further comprises a strip steel cleaning promoting process and a strip steel coating process which are sequentially arranged behind the strip steel cleaning process, the strip steel cleaning process comprises an uncoiling procedure, a cleaning procedure, a drying procedure and a high-temperature annealing procedure, the strip steel cleaning promoting process comprises a secondary cleaning procedure and a secondary drying procedure, and the strip steel coating process comprises a coating process and a baking and drying process; and the invention further discloses an insulating coating of the non-oriented silicon steel forthe extra-large generator. According to the production method of the non-oriented silicon steel for the extra-large generator and the insulating coating of the non-oriented silicon steel for the extra-large generator, the problems that the secondary paint coating falls off and the bottom is exposed, and bubbles and bright spots are usually easily generated on the surface of the thick coating areeffectively solved.

Description

technical field [0001] The present invention relates to metallurgical technology / cold rolling and annealing technology, more specifically, relates to a kind of non-oriented silicon steel production method and its insulating coating used for extra-large generators. Background technique [0002] High-efficiency, low-energy supercritical and supercritical large-scale generator sets have become the future development direction of the electric power industry, and the key material C6 extremely thick-coated electrical steel required for the manufacture of large-scale generators, because it requires coating The thickness reaches 4-7μm, which is more difficult to produce than the conventional coating thickness <1μm, and has high technical content. Therefore, only a few developed countries in the world can produce it, and the production process is completely confidential. The current situation of being unable to produce qualified extremely thick coated electrical steel seriously li...

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned patents have different coating formulations, but all of them are more suitable for the coating thickness of 2-5 μm, but still cannot satisfy the C6 extremely thick coated electrical steel with a coating thickness of 4-7 μm.

Images