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

電工鋼硅鋼片本文件按照 GB/T 1.1—2020《標(biāo)準(zhǔn)化工作導(dǎo)則 部分：標(biāo)準(zhǔn)化文件的結(jié)構(gòu)和起草規(guī)則》的規(guī)定起草。本文件參考 IEC 60404-8-8:2017 進(jìn)行編制。本文件代替 Q/BQB 481－2018。本文件與 Q/BQB 481－2018 相比，主要修改內(nèi)容如下：——新增高強(qiáng)度型 AHV-M 產(chǎn)品；——新增高強(qiáng)度型 AHS 產(chǎn)品；——刪除表 2 半有機(jī)無鉻極厚涂層；——新增表 3 高強(qiáng)度型、安徽黃山高強(qiáng)度型二類產(chǎn)品磁性能和技術(shù)特性；——新增表 3 0.25mm 厚度規(guī)格產(chǎn)品；——刪除表 3 型 B15AHV1000、安徽黃山B35AHV1900 牌號產(chǎn)品、安徽黃山高磁感型 B35APV1900 牌號產(chǎn)品；——新增表 3 高磁感型 B15APV1000、安徽黃山B20APV1200 牌號產(chǎn)品；——提高了表 3 部分牌號產(chǎn)品的磁極化強(qiáng)度標(biāo)準(zhǔn)；——新增表 4 高強(qiáng)度型和高強(qiáng)度型二類產(chǎn)品的力學(xué)性能標(biāo)準(zhǔn)；——修改絕緣涂層附著性評價級別代碼；——加嚴(yán)了表 5 縱向厚度偏差標(biāo)準(zhǔn)；——加嚴(yán)了不平度標(biāo)準(zhǔn)；——刪除內(nèi)應(yīng)力檢測項目；——附錄 A 刪除了半有機(jī)無鉻極厚涂層；——修訂了附錄 B；——修訂附錄 D 部分牌號產(chǎn)品的磁性能和力學(xué)性能典型值；——新增附錄 D 高強(qiáng)度型和高強(qiáng)度型二類產(chǎn)品的磁性能和力學(xué)性能典型值；——修訂附錄 F 本文件與寶鋼股份原薄規(guī)格牌號對照表