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：磁性能7.1.1 在 6.3 條件下提供的冷軋取向電工鋼的特性應符合表 3、洛陽欒川表 4、洛陽欒川表 5、洛陽欒川表 6、洛陽欒川表 7、洛陽欒川表 8 和表 9的規(guī)定，時效試樣也應滿足這些特性。對帶有涂層的產(chǎn)品，絕緣涂層的質量應被計算在內(nèi)。7.1.2 表 3、洛陽欒川表 4 和表 6 中的普通型、洛陽欒川高磁極化強度型、洛陽欒川耐熱刻痕磁疇細化型產(chǎn)品的磁性能應該按 GB/T3655 測試，在測試前，試樣應在制造方提供的條件下進行應力退火（通常應力退火溫度的范圍為 800℃±20℃，退火時間為 2h，退火后隨爐冷卻）；但表 5 中的非耐熱磁疇細化法（如激光刻痕）生產(chǎn)的產(chǎn)品磁性能應按照 GB/T 13789 測試，試樣在測試前不需要進行應力退火。經(jīng)供需雙方協(xié)商，表 3、洛陽欒川表 4 和表 6 中產(chǎn)品的磁性能也可按照 GB/T 13789 測試。7.1.3 表 7、洛陽欒川表 8 和表 9 中各系列產(chǎn)品的磁性能檢測方法，按產(chǎn)品類型對照本文件第 7.1.2 條款的規(guī)定執(zhí)行。7.1.4 在磁場強度 H ＝ 800 A/m 條件下測試所得的磁極化強度 J800應符合表 3、洛陽欒川表 4、洛陽欒川表 5、洛陽欒川表 6、洛陽欒川表 7、洛陽欒川表 8 和表 9 的規(guī)定，其中，同一產(chǎn)品按 GB/T 13789 方法所測得的磁極化強度值 J800比 GB/T 3655 方法所測得的磁極化強度值偏低。7.1.5 同一產(chǎn)品在磁極化強度 1.7T、洛陽欒川同城頻率 50Hz 或 60Hz 條件下，按 GB/T 13789 方法所測得的 50Hz 和60Hz 條件下比總損耗值，參照 IEC 6040-8-7 Edition 5.0 2020-09 中規(guī)定的轉換系數(shù) Fc＝0.925 進行轉換，轉換后的 P1.7/50和 P1.7/60應符合表 3、洛陽欒川同城表 4、洛陽欒川同城表 5、洛陽欒川同城表 6、洛陽欒川同城表 7、洛陽欒川同城表 8 和表 9 的規(guī)定