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:

電工鋼硅鋼片主要用作各種電機(jī)、甘肅隴南附近發(fā)電機(jī)和變壓器的鐵芯。比總損耗(鐵損) specific total loss (iron loss)比總損耗是在磁極化波形保持正弦，其峰值和頻率為特定值時(shí)，單位質(zhì)量材料所消耗的總功率，比總損耗用符號(hào) P(Jm/f)表示，單位為 W/kg。例：P1.5/50表示在 磁極化強(qiáng)度為 1.5T、甘肅隴南附近頻率為 50Hz 時(shí)的比總損耗。3.2 磁極化強(qiáng)度 magnetic polarizationQ/BQB 480－20212磁極化強(qiáng)度是指試樣受交變磁化時(shí)，特定磁場(chǎng)強(qiáng)度峰值的磁極化強(qiáng)度峰值，其符號(hào)為J(H)，單位為 T(特斯拉)。例：J5000表示對(duì)應(yīng)于磁場(chǎng)強(qiáng)度峰值為 5000A/m 下的磁極化強(qiáng)度峰值。4 分類本文件的材料的等級(jí)是根據(jù)磁極化強(qiáng)度在1.5T、甘肅隴南附近頻率在50Hz下的 比總損耗名義值P1.5/50(W/kg)、甘肅隴南附近材料公稱厚度進(jìn)行牌號(hào)分類，并按產(chǎn)品特性細(xì)分為普通型、甘肅隴南附近應(yīng)力退火型和型三類。示例 1：B35A210 表示公稱厚度為 0.35mm 的普通型無取向電工鋼， 比總損耗名義值P1.5/50為2.10W/kg；示例 2：B35AR300 表示公稱厚度為 0.35mm 的應(yīng)力退火型無取向電工鋼， 比總損耗名義值P1.5/50為3.00W/kg；示例 3：B35AH230 表示公稱厚度為 0.35mm 的型無取向電工鋼， 比損耗名義值P1.5/50為2.30W/kg。示例 4：35WW210 表示公稱厚度為 0.35mm 的普通型 WW 無取向電工鋼， 比損耗名義值P1.5/50為2.10W/kg。示例 5：35WH230 表示公稱厚度為 0.35mm 的型 WH 無取向電工鋼， 比損耗名義值P1.5/50為2.30W/kg。5.3 絕緣涂層的分類和代號(hào)絕緣涂層的分類和代號(hào)應(yīng)符合表2的規(guī)定。表 2 絕緣涂層的分類和代號(hào)絕緣涂層種類 代號(hào) 特征半有機(jī)薄涂層 A 改善沖片性，并有良好的焊接性半有機(jī)厚涂層 H 沖片性好，層間電阻高半有機(jī)無鉻薄涂層 K 涂層中不含鉻，具有良好的焊接性半有機(jī)無鉻厚涂層 M 涂層中不含鉻，具有良好的絕緣性能半有機(jī)無鉻極厚涂層 J 涂層中不含鉻，具有極好的絕緣性能半有機(jī)無鉻超厚涂層 L 涂層中不含鉻，具有極高的絕緣性能自粘接涂層 Z 涂層中不含鉻，固化后具有良好的粘接性能，鐵心固定強(qiáng)度大。

電工鋼硅鋼片一般要求電機(jī)、甘肅隴南當(dāng)?shù)刈儔浩骱推渌娖鞑考矢撸碾娏可?，體積小和重量輕。電工鋼板通常是以鐵芯損耗和磁感應(yīng)強(qiáng)度作為產(chǎn)品磁性保證值磁感應(yīng)強(qiáng)度是鐵芯單位截面積上通過的磁力線數(shù)，也稱磁通密度，它代表材料的磁化能力，單位為T。電工鋼板的磁感應(yīng)強(qiáng)度高，鐵芯的激磁電流（也稱空載電流）降低，銅損和鐵損都下降，可節(jié)省電能。當(dāng)電機(jī)和變壓器功率不變時(shí)，磁感應(yīng)強(qiáng)度高，設(shè)計(jì)Bm可提高，鐵芯截面積可縮小，這使鐵芯體積減小和重量減輕，并節(jié)省電工鋼板、甘肅隴南當(dāng)?shù)貙?dǎo)線、甘肅隴南同城絕緣材料和結(jié)構(gòu)材料用量，可降低電機(jī)和變壓器的總損耗和制造成本，并且有利于大變壓器和大電機(jī)的制造、甘肅隴南同城安裝和運(yùn)輸。