50WW290资源放心选择

电工钢硅钢片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

电工钢硅钢片本文件按照 GB/T 1.1—2020《标准化工作导则 部分：标准化文件的结构和起草规则》的规定起草。本文件参考 IEC 60404-8-8:2017 进行编制。本文件代替 Q/BQB 481－2018。本文件与 Q/BQB 481－2018 相比，主要修改内容如下：——新增高强度型 AHV-M 产品；——新增高强度型 AHS 产品；——删除表 2 半有机无铬极厚涂层；——新增表 3 高强度型、华尔网高强度型二类产品磁性能和技术特性；——新增表 3 0.25mm 厚度规格产品；——删除表 3 型 B15AHV1000、华尔网B35AHV1900 牌号产品、华尔网高磁感型 B35APV1900 牌号产品；——新增表 3 高磁感型 B15APV1000、华尔网B20APV1200 牌号产品；——提高了表 3 部分牌号产品的磁极化强度标准；——新增表 4 高强度型和高强度型二类产品的力学性能标准；——修改绝缘涂层附着性评价级别代码；——加严了表 5 纵向厚度偏差标准；——加严了不平度标准；——删除内应力检测项目；——附录 A 删除了半有机无铬极厚涂层；——修订了附录 B；——修订附录 D 部分牌号产品的磁性能和力学性能典型值；——新增附录 D 高强度型和高强度型二类产品的磁性能和力学性能典型值；——修订附录 F 本文件与宝钢股份原薄规格牌号对照表