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《標準化工作導則 部分：標準化文件的結(jié)構(gòu)和起草規(guī)則》的規(guī)定起草。本文件代替 Q/BQB 485－2020。本文件與 Q/BQB 485-2020 相比，主要修改內(nèi)容如下：— 新增了普通型 Q、湖北黃岡附近高磁極化強度型 QG、湖北黃岡附近磁疇細化型 RK 產(chǎn)品牌號；— 補充配電變壓器專用和耐熱刻痕磁疇細化兩個類型產(chǎn)品；— 補充 B18P070、湖北黃岡附近B20P075、湖北黃岡附近B23P080、湖北黃岡附近B27P085、湖北黃岡附近B27P120、湖北黃岡附近B30P090 六個高磁極化強度型產(chǎn)品和B18R055、湖北黃岡附近B18R060、湖北黃岡附近B20R060、湖北黃岡附近B20R065、湖北黃岡附近B23R070 五個磁疇細化型產(chǎn)品；— 依據(jù) IEC 文件（IEC 6040-8-7 Edition 5.0 2020-09），對單片法（SST）磁性能檢測數(shù)據(jù)轉(zhuǎn)換規(guī)則進行調(diào)整；— 補充無 Cr 環(huán)保涂層產(chǎn)品相關(guān)規(guī)定；— 修改了鋼帶的浪高標準。請注意本文件的某些內(nèi)容可能涉及 。本文件的發(fā)布機構(gòu)不承擔識別 的責任。本文件由寶山鋼鐵股份有限公司硅鋼事業(yè)部和制造管理部提出。本文件由寶山鋼鐵股份有限公司硅鋼事業(yè)部、湖北黃岡附近制造管理部和武鋼有限聯(lián)合起草。本文件所代替的歷次版本發(fā)布情況為：Q/BQB 485－2007，Q/BQB 485－2014，Q/BQB 485－2016，Q/BQB485－2018，Q/BQB 485－2020。