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:

電工鋼硅鋼片：密度用于計(jì)算磁性能和疊裝系數(shù)的約定密度為 7.65×103 kg/m3。7.4.2 疊裝系數(shù)產(chǎn)品的小疊裝系數(shù)應(yīng)符合表 3、湖北宜昌同城表 4、湖北宜昌同城表 5、湖北宜昌同城表 6、湖北宜昌同城表 7、湖北宜昌同城表 8 和表 9 的規(guī)定。7.4.3 彎曲次數(shù)產(chǎn)品平行于軋制方向的小彎曲次數(shù)應(yīng)不小于 1 次。供方如能保證，可不進(jìn)行該試驗(yàn)。7.4.4 由內(nèi)應(yīng)力引起的剪切邊的偏差產(chǎn)品應(yīng)盡可能量避免出現(xiàn)內(nèi)應(yīng)力。根據(jù)需方要求，并在合同中注明，可對(duì)寬度不小于 500mm 的材料（縱切分條后的材料）檢測(cè)由內(nèi)應(yīng)力引起的剪切邊偏差，其縫隙測(cè)量值應(yīng)不超過 1mm。供方如能保證，可不進(jìn)行該試驗(yàn)。8 檢驗(yàn)和試驗(yàn)8.1 一般要求8.1.1 按本文件簽訂訂貨協(xié)議時(shí)，用戶可按GB/T 17505規(guī)定進(jìn)行規(guī)定檢驗(yàn)和試驗(yàn)或非規(guī)定檢驗(yàn)和試驗(yàn)。然而，對(duì)于非規(guī)定檢驗(yàn)和試驗(yàn)，制造方應(yīng)提供所需產(chǎn)品的比總損耗值和磁極化強(qiáng)度值。8.1.2 當(dāng)按規(guī)定檢驗(yàn)和試驗(yàn)訂貨時(shí)，用戶應(yīng)明確 GB/T 18253 中的檢驗(yàn)文件的類型。