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2 供貨形式6.2.1 產(chǎn)品以卷供貨，簡稱鋼卷。鋼卷的重量應(yīng)符合訂貨要求，卷重一般3～10 噸，特殊卷重應(yīng)在訂貨時協(xié)商并在合同中注明。6.2.2 鋼卷通常以切邊狀態(tài)交貨。用戶有特殊要求時，應(yīng)在訂貨時協(xié)商并在合同中注明。6.2.3 鋼卷內(nèi)徑應(yīng)在 500mm～520mm 范圍內(nèi)，鋼卷內(nèi)徑為 508mm。6.2.4 鋼卷應(yīng)由同一寬度的鋼帶連續(xù)、河北保定附近緊密卷繞，卷的側(cè)面應(yīng)盡量平直，自重下不塌卷。6.3 交貨狀態(tài)鋼帶以終退火并兩面涂敷絕緣涂層的狀態(tài)交貨。6.4 表面質(zhì)量6.4.1 鋼帶表面應(yīng)光滑清潔，無油脂，無銹漬，無影響使用的缺陷。6.4.2 鋼帶表面允許存在不影響材料正常使用的在厚度偏差允許范圍內(nèi)的基板缺欠、河北保定本地絕緣涂層缺欠，如輕微劃傷、河北保定本地色差、河北保定本地輥印、河北保定本地斑紋等缺欠。

電工鋼硅鋼片供方可采用不同的檢驗和試驗方法進(jìn)行驗收測試，發(fā)生爭議時，應(yīng)采用本文件規(guī)定的檢驗和試驗方法及相關(guān)的技術(shù)要求進(jìn)行測試。9 判定與復(fù)驗規(guī)則產(chǎn)品的判定與復(fù)驗規(guī)則應(yīng)符合 GB/T 17505 的規(guī)定。規(guī)定的磁性能及工藝性能檢驗項目中，如有某一項試驗結(jié)果不符合本文件要求，則從同一批中再任取雙倍數(shù)量的試樣進(jìn)行該不合格項目的復(fù)驗。復(fù)驗結(jié)果(包括該項目試驗所要求的所有指標(biāo))合格，則整批合格。復(fù)驗結(jié)果(包括該項目試驗所要求的所有指標(biāo))即使有一個指標(biāo)不合格，則復(fù)驗不合格。如復(fù)驗不合格，則已做試驗且試驗結(jié)果不合的單件不能驗收，但該批材料中未做試驗的單件可逐件重新提交試驗和驗收。