電工鋼硅鋼片：磁性能7.1.1 在 6.3 條件下提供的冷軋取向電工鋼的特性應(yīng)符合表 3、湖北武漢表 4、湖北武漢表 5、湖北武漢表 6、湖北武漢表 7、湖北武漢表 8 和表 9的規(guī)定，時(shí)效試樣也應(yīng)滿足這些特性。對帶有涂層的產(chǎn)品，絕緣涂層的質(zhì)量應(yīng)被計(jì)算在內(nèi)。7.1.2 表 3、湖北武漢表 4 和表 6 中的普通型、湖北武漢高磁極化強(qiáng)度型、湖北武漢耐熱刻痕磁疇細(xì)化型產(chǎn)品的磁性能應(yīng)該按 GB/T3655 測試，在測試前，試樣應(yīng)在制造方提供的條件下進(jìn)行應(yīng)力退火（通常應(yīng)力退火溫度的范圍為 800℃±20℃，退火時(shí)間為 2h，退火后隨爐冷卻）；但表 5 中的非耐熱磁疇細(xì)化法（如激光刻痕）生產(chǎn)的產(chǎn)品磁性能應(yīng)按照 GB/T 13789 測試，試樣在測試前不需要進(jìn)行應(yīng)力退火。經(jīng)供需雙方協(xié)商，表 3、湖北武漢表 4 和表 6 中產(chǎn)品的磁性能也可按照 GB/T 13789 測試。7.1.3 表 7、湖北武漢表 8 和表 9 中各系列產(chǎn)品的磁性能檢測方法，按產(chǎn)品類型對照本文件第 7.1.2 條款的規(guī)定執(zhí)行。7.1.4 在磁場強(qiáng)度 H ＝ 800 A/m 條件下測試所得的磁極化強(qiáng)度 J800應(yīng)符合表 3、湖北武漢表 4、湖北武漢表 5、湖北武漢表 6、湖北武漢表 7、湖北武漢表 8 和表 9 的規(guī)定，其中，同一產(chǎn)品按 GB/T 13789 方法所測得的磁極化強(qiáng)度值 J800比 GB/T 3655 方法所測得的磁極化強(qiáng)度值偏低。7.1.5 同一產(chǎn)品在磁極化強(qiáng)度 1.7T、湖北武漢同城頻率 50Hz 或 60Hz 條件下，按 GB/T 13789 方法所測得的 50Hz 和60Hz 條件下比總損耗值，參照 IEC 6040-8-7 Edition 5.0 2020-09 中規(guī)定的轉(zhuǎn)換系數(shù) Fc＝0.925 進(jìn)行轉(zhuǎn)換，轉(zhuǎn)換后的 P1.7/50和 P1.7/60應(yīng)符合表 3、湖北武漢同城表 4、湖北武漢同城表 5、湖北武漢同城表 6、湖北武漢同城表 7、湖北武漢同城表 8 和表 9 的規(guī)定

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