電工鋼硅鋼片Electrical steel, also known as silicon steel sheet, is an indispensable metal material in the power, electronics, and military industries, and is also the largest functional material in production. It is mainly used as the iron core for various motors, generators, and transformers. Specific total loss (iron loss) is the total power consumed per unit mass of material when the magnetic polarization waveform remains sinusoidal, with a specific peak and frequency. The specific total loss is represented by the symbol P (Jm/f), in W/kg. Example: P1.5/50 represents the specific total loss at a maximum magnetic polarization intensity of 1.5T and a frequency of 50Hz. 3.2 Magnetic Polarization Q/BQB 480-20212 Magnetic polarization intensity refers to the peak magnetic polarization intensity of a specific magnetic field intensity when a sample is subjected to alternating magnetization. Its symbol is J (H), and the unit is T (Tesla). Example: J5000 represents the peak magnetic polarization intensity corresponding to a magnetic field intensity peak of 5000A/m. The material grades in this document are classified based on the nominal maximum specific total loss P1.5/50 (W/kg) at a magnetic polarization strength of 1.5T and a frequency of 50Hz, as well as the nominal thickness of the material. They are further divided into three categories based on product characteristics: ordinary type, stress relief annealing type, and high-efficiency type. Example 1: B35A210 represents a common non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific total loss value P1.5/50 is 2.10W/kg； Example 2: B35AR300 represents a stress relieved annealed non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific total loss value P1.5/50 is 3.00W/kg； Example 3: B35AH230 represents an efficient non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.30W/kg. Example 4: 35WW210 represents a normal type WW non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.10W/kg. Example 5: 35WH230 represents an efficient WH non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.30W/kg. The classification and code of insulation coatings shall comply with the provisions of Table 2. Table 2 Classification and Code of Insulation Coatings Type Code Characteristics of Insulation Coatings Semi organic Thin Coating A Improves Punching Performance and Has Good Weldability Semi organic Thick Coating H has Good Punching Performance and High Interlayer Resistance Semi organic Chromium Free Thin Coating K does not contain chromium and has good weldability Semi organic Chromium Free Thick Coating M does not contain chromium and has good insulation performance Semi organic Chromium Free Extreme Thick Coating J does not contain chromium and has excellent insulation performance Semi organic Chromium Free Ultra Thick Coating L does not contain chromium and has extremely high insulation performance Self adhesive Coating

電工鋼硅鋼片對硅鋼性能的要求主要是：1、同城鐵損低，這是硅鋼片質量的重要指標。各國都根據鐵損值劃分牌號，鐵損愈低，牌號愈高。2、同城較強磁場下磁感應強度（磁感）高，這使電機和變壓器的鐵芯體積與重量減小，節約硅鋼片、同城銅線和絕緣材料等。3、同城表面光滑、同城平整和厚度均勻，可以提高鐵芯的填充系數。4、同城沖片性好，對制造微型、同城小型電動機更為重要。5、同城表面絕緣膜的附著性和焊接性良好，能防蝕和改善沖片性。絕緣涂層將硅鋼板加工成鐵芯時，為改善其加工性能并防止相當于鋼板厚度自乘的渦電流損失，采用連續涂鍍設備，在鋼板上下面噴射絕緣涂液

電工鋼硅鋼片 電工鋼板通常是以鐵芯損耗和磁感應強度作為產品磁性保證值[1] [2] 。對電工鋼板性能的要求如下：鐵芯損耗（PT）低鐵芯損耗是指鐵芯在≥50Hz交變磁場下磁化時所消耗的無效電能，簡稱鐵損，也稱交變損耗，其單位為W/kg。這種由于磁通變化受到各種阻礙而消耗的無效電能，通過鐵芯發熱既損失掉電能，又引起電機和變壓器的溫升。電工鋼的鐵損（PT）包括磁滯損耗、本地渦流損耗（Pe）和反常損耗（Pa）三部分。電工鋼板鐵損低，既可節省大量電能，又可延長電機和變壓器工作運轉時間，并簡化冷卻裝置。由于電工鋼板的鐵損所造成的電量損失占各國全年發電量的2.5％~4.5％，因此各國生產電工鋼板總是千方百計設法降低鐵損，并以鐵損作為考核產品磁性的重要指標，按產品的鐵損值作為劃分產品牌號的依據。冷軋取向電工鋼：冷軋取向電工鋼是電工鋼中的高端產品，與冷軋無取向電工鋼相比，磁性具有強烈的方向性；在易磁化的軋制方向上具有優越的高磁導率與低損耗特性。取向鋼帶在軋制方向的鐵損僅為橫向的1/3，磁導率之比為6：1。用途：冷軋取向硅鋼帶主要的用途是用于變壓器制造。