電工鋼硅鋼片疊裝系數產品的疊裝系數應符合表 3、云南臨滄附近表 4 的規(guī)定。供方如能保證，可不進行該試驗。仲裁時，適用于無絕緣涂層狀態(tài)。7.4.3 彎曲次數彎曲次數是指用肉眼在基板上觀測到 次出現貫穿試樣厚度的裂紋(或聽到產生裂紋的聲音)前的 反復彎曲次數，它表示材料的延展性。彎曲次數應符合表 3、云南臨滄附近表 4 的規(guī)定。供方如能保證，可不進行該試驗。7.4.4 內應力產品應盡可能量避免出現內應力。內應力的檢驗不適用于寬度小于或等于150mm 的鋼帶（縱切分條后的鋼帶）?？p隙測量值應不超過 2mm。供方如能保證，可不進行該試驗。8 檢驗和試驗8.1 檢驗批次產品應按批驗收，每個檢驗批應由不大于20噸的同牌號、云南臨滄附近同規(guī)格、云南臨滄附近同熱處理狀態(tài)、云南臨滄附近同絕緣涂層的鋼帶組成。對于重量大于20噸的鋼帶，每個鋼卷組成一個檢驗批。

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: