電工鋼硅鋼片當磁極化強度隨時間按正弦規(guī)律變化，其峰值為某一標定值，變化頻率為某一標定頻率時，單位長度電工鋼片（帶）沿磁化方向上發(fā)生磁致伸縮所引起的表面振動聲壓水平為 A 計權磁致伸縮速度水平。3.5 表面絕緣電阻 surface insulation resistance在規(guī)定條件下所測得的直流電阻，即產(chǎn)品在加直流電壓，經(jīng)過一定時間極化過程后，流過帶鋼（片）表面的泄漏電流對應的電阻，其符號為 C，單位為Ω·mm2/面或Ω·cm2/面。3.6 層間電阻 inter-lamination resistance產(chǎn)品疊片間，即上、福建漳州本地下兩個表面的絕緣電阻，稱為層間電阻，其符號為 RA，理論上是表面絕緣電阻的 2 倍，單位為Ω·mm2/片或Ω·cm2/片。4 分類本文件的材料的等級是根據(jù)磁極化強度在1.7T、福建漳州本地頻率在50Hz下的 比總損耗名義值P1.7/50(W/kg)、福建漳州材料公稱厚度進行牌號分類，并按產(chǎn)品特性和特殊用途，細分為普通型、福建漳州高磁極化強度型、福建漳州磁疇細化型、福建漳州耐熱磁疇細化型、福建漳州低噪聲型、福建漳州配電變壓器專用型、福建漳州特高壓變壓器專用型、福建漳州無涂層型八類。

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: