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

電工鋼硅鋼片疊裝系數(shù)產(chǎn)品的疊裝系數(shù)應(yīng)符合表 3、澳門附近表 4 的規(guī)定。供方如能保證，可不進(jìn)行該試驗(yàn)。仲裁時(shí)，適用于無(wú)絕緣涂層狀態(tài)。7.4.3 彎曲次數(shù)彎曲次數(shù)是指用肉眼在基板上觀測(cè)到 次出現(xiàn)貫穿試樣厚度的裂紋(或聽到產(chǎn)生裂紋的聲音)前的 反復(fù)彎曲次數(shù)，它表示材料的延展性。彎曲次數(shù)應(yīng)符合表 3、澳門附近表 4 的規(guī)定。供方如能保證，可不進(jìn)行該試驗(yàn)。7.4.4 內(nèi)應(yīng)力產(chǎn)品應(yīng)盡可能量避免出現(xiàn)內(nèi)應(yīng)力。內(nèi)應(yīng)力的檢驗(yàn)不適用于寬度小于或等于150mm 的鋼帶（縱切分條后的鋼帶）?？p隙測(cè)量值應(yīng)不超過(guò) 2mm。供方如能保證，可不進(jìn)行該試驗(yàn)。8 檢驗(yàn)和試驗(yàn)8.1 檢驗(yàn)批次產(chǎn)品應(yīng)按批驗(yàn)收，每個(gè)檢驗(yàn)批應(yīng)由不大于20噸的同牌號(hào)、澳門附近同規(guī)格、澳門附近同熱處理狀態(tài)、澳門附近同絕緣涂層的鋼帶組成。對(duì)于重量大于20噸的鋼帶，每個(gè)鋼卷組成一個(gè)檢驗(yàn)批。