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(duì)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(chǎng)下磁化時(shí)所消耗的無(wú)效電能，簡(jiǎn)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(wú)效電能，通過(guò)鐵芯發(fā)熱既損失掉電能，又引起電機(jī)和變壓器的溫升。電工鋼的鐵損（PT）包括磁滯損耗、湖南永州當(dāng)?shù)販u流損耗（Pe）和反常損耗（Pa）三部分。電工鋼板鐵損低，既可節(jié)省大量電能，又可延長(zhǎng)電機(jī)和變壓器工作運(yùn)轉(zhuǎn)時(shí)間，并簡(jiǎn)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(guó)全年發(fā)電量的2.5％~4.5％，因此各國(guó)生產(chǎn)電工鋼板總是千方百計(jì)設(shè)法降低鐵損，并以鐵損作為考核產(chǎn)品磁性的重要指標(biāo)，按產(chǎn)品的鐵損值作為劃分產(chǎn)品牌號(hào)的依據(jù)。冷軋取向電工鋼：冷軋取向電工鋼是電工鋼中的高端產(chǎn)品，與冷軋無(wú)取向電工鋼相比，磁性具有強(qiáng)烈的方向性；在易磁化的軋制方向上具有優(yōu)越的高磁導(dǎo)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(dǎo)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。