電工鋼硅鋼片：取樣應(yīng)從每一個(gè)驗(yàn)收組批上切取。8.2.2 產(chǎn)品的內(nèi)圈和外圈應(yīng)視為包裝材，不代表整個(gè)鋼卷的質(zhì)量，試樣不應(yīng)從這部分截取。試樣應(yīng)避開(kāi)焊縫和接帶區(qū)域。8.2.3 取樣位置距產(chǎn)品頭尾兩端不小于 3m，距產(chǎn)品邊部不小于 15mm 處截取。對(duì)大單片磁性能、貴州畢節(jié)同城絕緣涂層附著性等有特殊取樣要求的檢測(cè)項(xiàng)目，則按照附錄 A 的規(guī)定取樣。8.2.4 通過(guò)合理地安排測(cè)試順序，同一副試樣可以用于測(cè)試多種特性。8.3 表面外觀檢查產(chǎn)品的表面外觀質(zhì)量用肉眼檢查。8.4 尺寸和外形的測(cè)量8.4.1 尺寸和外形應(yīng)采用合適的測(cè)量工具測(cè)量。測(cè)量位置距產(chǎn)品頭尾兩端不小于 3m。8.4.2 厚度的測(cè)量切邊鋼帶的厚度應(yīng)在距邊部不小于 15mm 的任意位置處測(cè)量。測(cè)量所采用的千分尺精度應(yīng)為0.001mm。8.4.3 不平度(波浪度)的測(cè)量

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