I. Overview
Silicon steel sheet refers to a class of soft magnetic materials commonly used in the low-voltage electrical industry, is a low-voltage electrical silicon steel often cast and rolled into normative specifications of the large sheet or oriented silicon steel, commonly used in electric motors, generator sets, power transformers, electromagnetic energy units, solenoid valves electronic components and inductive sensors. Magnesium oxide is generally used in oriented steel coating, oriented silicon steel surface insulation coating is divided into organic coating, inorganic coating and semi-inorganic coating three categories. The inorganic coating contains magnesium oxide, and the inorganic coating has good heat resistance and welding performance.
II. the role
Magnesium oxide as a key raw material in the orientation of silicon steel coating, what are the role?
1, magnesium oxide as a barrier agent, can prevent the strip from sticking in the high temperature annealing stage, you need to apply a layer of magnesium oxide coating liquid evenly on the upper and lower appearance of the strip.
2, the use of magnesium oxide for silicon steel coating can make the surface of silicon steel to form a layer of film with orientation, so as to enhance its mechanical properties.
3, magnesium oxide can react with silicon dioxide on the surface of silicon steel to form an excellent magnesium silicate insulating layer, improve magnetic susceptibility and can remove nitrogen, sulfur and other impurities in steel.
III. the summary and precautions
To summarize, magnesium oxide coating liquid in the appearance of oriented silicon steel coating coverage quality on the quality of silicon steel products plays a vital role. Silicon steel coatings are generally used light or heavy 98 magnesium oxide as an additive, and magnesium oxide in the coating in the filling accounted for a quarter of the content of magnesium oxide, chloride, iron ions, acid insoluble and other indicators have certain requirements.
Therefore, in the selection of magnesium oxide should be strict consideration of the above indicators, or directly choose Messi Biology team research and development of special magnesium oxide for silicon steel coating will be more assured and worry!