Basic Knowledge Of Silicon Steel Sheets

Classification of silicon steel sheets

　　1, silicon steel sheet according to its silicon content can be divided into two kinds of low silicon and high silicon. Low silicon sheet contains less than 2.8% silicon, it has a certain mechanical strength, mainly used in the manufacture of motors, commonly known as motor silicon steel sheet; high silicon sheet contains 2.8%-4.8% silicon, it has good magnetic properties, but more brittle, mainly used in the manufacture of transformer cores, commonly known as transformer silicon steel sheet. There is no strict boundary between the two in actual use, and high silicon wafers are commonly used to manufacture large motors.

　　2, according to the production and processing process can be divided into hot-rolled and cold-rolled two, cold-rolled and can be divided into grain non-oriented and grain-oriented two. Cold-rolled sheet thickness uniformity, good surface quality, higher magnetic properties, therefore, with the development of industry, hot-rolled sheet has been replaced by cold-rolled sheet trend (China has explicitly requested to stop using hot-rolled silicon steel sheet, that is, the early said "cold instead of hot").

Performance indicators of silicon steel sheet
　　1. Low iron loss. The most important indicator of quality, the world is divided into grades by the value of iron loss, the lower the iron loss, the higher the grade, and the higher the quality.
　　2. High magnetic induction strength. In the same magnetic field can obtain a higher magnetic induction of silicon steel sheet, with it manufacturing the volume and weight of the motor or transformer core is smaller, relatively speaking can save silicon steel sheet, copper wire and insulation materials.
　　3. High stacking factor. The surface of silicon steel sheet is smooth, flat and uniform in thickness, and the stacking factor of the core is increased.
　　4、Good flushing properties. For the manufacture of small and micro motor cores, this is even more important.
　　5. Good adhesion of the surface to the insulating film and good weldability.
　6、Magnetic ageing
　　7、Silicon steel sheet must be delivered after annealing and pickling.