電工鋼硅鋼片：用 25cm 愛潑斯坦方圈測量時，參照檢測方法 GB/T 3655（IEC 60404-2，IDT）,一副試樣由不少于24 片的樣片組成。試樣的長度方向應沿平行于產(chǎn)品軋制方向切取，試樣長度方向與產(chǎn)品軋制方向的偏離角度應在±1 以內(nèi)，試樣應盡可能覆蓋產(chǎn)品的全板寬范圍。試樣應的取樣方法、福建附近尺寸及允許偏差應符合 GB/T 3655 的規(guī)定。測試前，試樣應在制造方提供的條件下進行應力退火處理。測試產(chǎn)品時效試樣的 比總損耗時，時效試樣應在 225℃±5℃溫度中持續(xù)保溫 24h，然后空冷到環(huán)境溫度。8.5.2 單片法（SST）測量用單片測試儀測量時，試樣的取樣方法、福建附近尺寸及允許偏差應符合 GB/T 13789（IEC 60404-3，IDT)）的規(guī)定。為保證磁性測試結(jié)果對帶鋼磁性能的代表性，裁剪大單片試樣時，試樣沿縱向的中心線位置與產(chǎn)品寬度方向中心位置偏移量應≤50mm，試樣縱向與樣板軋制方向的偏離角度應在±1 以內(nèi)。單片法測量的試樣不需要應力退火處理，也不允許進行時效測試。

電工鋼硅鋼片In addition to the types listed above, there are also some special purpose electrical steel plates, such as 0.15 and 0.20mm thick 3％ Si cold-rolled non oriented silicon steel strips and 0.025, 0.05, and 0.1mm thick 3％ Si cold-rolled oriented silicon steel strips, used for medium and high-frequency motors, transformers, and pulse transformers； 0.7mm thick 3％ Si high-strength cold-rolled non oriented silicon steel plate for relays and power switches； High strength cold-rolled electrical steel plate for new high-speed motor rotors； Low carbon electrical steel hot-rolled thick and cold-rolled plates for magnetic shielding and high-energy accelerator electromagnets such as medical magnetic resonance tomography scanners； 4.5％ to 6.5％ Si high silicon steel plates for high-frequency motors, transformers, and magnetic shielding.Generally, motors, transformers, and other electrical components are required to have high efficiency, low power consumption, small size, and light weight. Electrical steel plates are usually guaranteed to have magnetic properties based on core loss and magnetic induction strength [1] [2]. The requirements for the performance of electrical steel plates are as follows:Low core loss (PT)Iron core loss refers to the ineffective electrical energy consumed by an iron core when magnetized in an alternating magnetic field of ≥ 50Hz, abbreviated as iron loss, also known as alternating loss, and its unit is W/kg. The ineffective electrical energy consumed due to various obstacles caused by magnetic flux changes not only loses electrical energy through the heating of the iron core, but also causes temperature rise of the motor and transformer. The iron loss (PT) of electrical steel includes three parts: hysteresis loss, eddy current loss (Pe), and anomalous loss (Pa). Electrical steel plates have low iron loss, which can save a lot of electricity, prolong the operating time of motors and transformers, and simplify cooling devices. Due to the iron loss of electrical steel plates, which accounts for 2.5％ to 4.5％ of the annual electricity generation in various countries, countries always try their best to reduce iron loss in the production of electrical steel plates, and use iron loss as the most important indicator to assess the magnetic properties of products. The iron loss value of products is used as the basis for classifying product grades. Cold rolled oriented electrical steel: Cold rolled oriented electrical steel is a high-end product in the field of electrical steel. Compared with cold rolled non oriented electrical steel, its magnetism has strong directionality； It has superior high magnetic permeability and low loss characteristics in the direction of easy magnetization rolling. The iron loss of oriented steel strip in the rolling direction is only 1/3 of that in the transverse direction, and the ratio of magnetic permeability is 6:1. Application: The main purpose of cold-rolled oriented silicon steel strip is for transformer manufacturing.Full process cold rolled non oriented silicon steel coating: The surface of the full process cold rolled silicon steel is coated with a semi transparent insulation coating, which has different codes in different standards. Taking Baosteel‘s Q/BQB 480 2014 as an example: