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：寶鋼激光刻痕磁疇細(xì)化型產(chǎn)品磁性能檢測(cè)采用了單片測(cè)試儀進(jìn)行測(cè)試，通常情況下取向電工鋼只測(cè)試平行于軋制方向的磁性能水平，特殊情況可以約定分別檢測(cè)平行于軋制方向和垂直于軋制方向的磁性能。具體測(cè)試方法符合 GB/T 13789-2008（IEC 60404-3:2002，IDT）相關(guān)規(guī)定，測(cè)試試樣公稱尺寸為 500mm×500mm，測(cè)試試樣長(zhǎng)度的誤差在±0.1％以內(nèi)，測(cè)試試樣的質(zhì)量誤差在±0.1％以內(nèi)。為保證磁性測(cè)試結(jié)果對(duì)帶鋼磁性能的代表性，裁剪大單片試樣時(shí)，試樣中心位置與帶鋼寬度方向中心位置偏移量控制在≤50mm，試樣邊部距離樣板邊部控制在≥100mm，試樣縱向與樣板軋制方向的偏離角度≤1.0°，如附圖 A.2 所示。試樣要求剪切整齊、當(dāng)?shù)仄教梗苯切院?，表面清潔，無影響性能試驗(yàn)的缺陷，試樣邊部不允許剪切后打磨，剪切毛刺高度不應(yīng)高于 20μm。大單片試樣不經(jīng)過應(yīng)力退火處理直接測(cè)試。