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电工钢硅钢片：交货状态产品以终退火状态交货，带涂层的产品两面涂敷绝缘涂层，无涂层系列产品表面无底层和绝缘涂层。绝缘涂层的种类由供方根据自身生产工艺确定，也可由供需双方协商确定。6.4 表面条件6.4.1 产品表面应光滑清洁，无油脂，无锈渍，无影响使用的缺陷。6.4.2 产品表面允许存在不影响材料正常使用的基板缺陷、四川甘孜当地底层缺陷、四川甘孜当地绝缘涂层缺陷，如轻微划痕、四川甘孜当地辊印、四川甘孜当地色差、四川甘孜当地露晶、四川甘孜当地色斑、四川甘孜当地小白点、四川甘孜当地小气泡、四川甘孜当地裂纹等缺陷。6.4.3 产品表面的绝缘涂层应附着良好，涂层颜色应均匀，以保证在合理剪切操作中和在制造方的应力退火条件下退火时不脱落，6.4.4 产品带焊缝或带缺陷交货时，需插入空白纸。必要时，相关空白纸的标记形式应由供需双方协商并在合同中注明。注：如果在协议中规定产品浸没在液体中使用时，需确保液体和涂层之间的兼容性。6.5 剪切适应性产品应便于用适当剪切工具在任何位置准确地剪切成通常形状。




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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



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