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. Since it is a functional material, its performance testing also revolves around "function". These indicators are often mentioned in trade and processing processes, and a brief understanding can help everyone better carry out their work. The performance testing of electrical steel mainly includes the following aspects: magnetic inspection, stacking coefficient inspection, coating adhesion inspection, repeated bending inspection, size and shape surface inspection, and conventional mechanical property inspection. In addition to the types of products listed above, there are also some special purpose electrical steel plates, such as 0.15 and 0.20mm thick 3％ Si cold-rolled non oriented silicon steel strips and 0.025, 0.05, and 0.1mm thick 3％ Si cold-rolled oriented silicon steel strips, which are used as intermediate and intermediate grade High frequency motors and transformers, as well as pulse transformers, etc； 0.7mm thick 3％ Si high-strength cold-rolled non oriented silicon steel plate for relays and power switches； High strength cold-rolled electrical steel plate for new high-speed motor rotors； Low carbon electrical steel hot-rolled thick and cold-rolled plates for magnetic shielding and high-energy accelerator electromagnets such as medical magnetic resonance tomography scanners； 4.5％ to 6.5％ Si high silicon steel plates for high-frequency motors, transformers, and magnetic shielding. Generally, motors, transformers, and other electrical components are required to have high efficiency, low power consumption, small size, and light weight. Electrical steel plates are usually guaranteed to have magnetic properties based on core loss and magnetic induction strength. Magnetic induction strength is the number of magnetic lines passing through a unit cross-sectional area of the iron core, also known as magnetic flux density. It represents the material‘s magnetization ability, measured in T. The magnetic induction strength of electrical steel plates is high, and the excitation current (also known as no-load current) of the iron core is reduced. Copper and iron losses are also reduced, which can save electrical energy. When the power of the motor and transformer remains constant, the magnetic induction intensity is high, and the design Bm can be increased. The cross-sectional area of the iron core can be reduced, which reduces the volume and weight of the iron core, and saves the amount of electrical steel plates, wires, insulation materials, and structural materials used. This can reduce the total loss and manufacturing cost of the motor and transformer, and is beneficial for the manufacturing, installation, and transportation of large transformers and motors. The main requirements for the performance of silicon steel are: 1. Low iron loss is the most important indicator of the quality of silicon steel sheets. Various countries classify grades based on iron loss values, with the lower the iron loss, the higher the grade. 2. Under strong magnetic fields, the magnetic induction intensity (magnetic induction) is high, which reduces the volume and weight of the iron core of the motor and transformer, saving silicon steel sheets, copper wires, and insulation materials. 3. The surface is smooth, flat, and the thickness is uniform, which can improve the filling coefficient of the iron core. 4. Good lamination performance is more important for manufacturing micro and small electric motors. 5. The adhesion and weldability of the surface insulation film are good, which can prevent corrosion and improve the punching performan

電工鋼硅鋼片硅鋼是一種硅鐵合金。用硅鋼軋制的片材是電工領域中應用廣的軟磁材料，因而硅鋼片又稱電工鋼片。硅鋼片廣泛用于電動機、發(fā)電機、變壓器、扼流圈、電磁機構、繼電器及測量儀表中電機工業(yè)大量使用厚度為0.35～0.50mm的硅鋼片,用于：中型旋轉機，壓縮電機，通用馬達，小型精密電機，電動汽車，壓縮機，通用電機，電源變壓器，精密變壓器，節(jié)能電機，焊機變壓器，穩(wěn)壓器，磁性密封器，加速器用電磁鐵，汽車電機等；在電信高頻技術中常用0.05~0.20mm的薄帶鋼片,以便更有效地降低渦流損耗。熱軋硅鋼片厚度為0.35～0.50mm，密度為7.55～7.70g/cm3,多用于大、中、小型交、直流電動機；冷軋無取向硅鋼片厚度為0.35～0.50mm，密度為7.65～7.75g/cm3，多用于大型交流發(fā)電機、電動機，大、中、小型交、直流電動機；冷軋取向硅鋼片厚度為0.23mm 0.27mm 0.3mm 0.35mm，密度為7.65g/cm3,多用于電力變壓器、油浸式變壓器，干式變壓器，電抗器、磁放大器等；冷軋取向薄帶厚度為0.05～0.20mm，多用于無線電高頻變壓器。

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：標準化文件的結構和起草規(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，主要修改內容如下：— 新增了普通型 Q、貴州貴陽附近高磁極化強度型 QG、貴州貴陽附近磁疇細化型 RK 產品牌號；— 補充配電變壓器專用和耐熱刻痕磁疇細化兩個類型產品；— 補充 B18P070、貴州貴陽附近B20P075、貴州貴陽附近B23P080、貴州貴陽附近B27P085、貴州貴陽附近B27P120、貴州貴陽附近B30P090 六個高磁極化強度型產品和B18R055、貴州貴陽附近B18R060、貴州貴陽附近B20R060、貴州貴陽附近B20R065、貴州貴陽附近B23R070 五個磁疇細化型產品；— 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)轉換規(guī)則進行調整；— 補充無 Cr 環(huán)保涂層產品相關規(guī)定；— 修改了鋼帶的浪高標準。請注意本文件的某些內容可能涉及 。本文件的發(fā)布機構不承擔識別 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、貴州貴陽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。