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：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符合表 3、甘肅張掖表 4、甘肅張掖表 5、甘肅張掖表 6、甘肅張掖表 7、甘肅張掖表 8 和表 9的規(guī)定，時效試樣也應滿足這些特性。對帶有涂層的產(chǎn)品，絕緣涂層的質(zhì)量應被計算在內(nèi)。7.1.2 表 3、甘肅張掖表 4 和表 6 中的普通型、甘肅張掖高磁極化強度型、甘肅張掖耐熱刻痕磁疇細化型產(chǎn)品的磁性能應該按 GB/T3655 測試，在測試前，試樣應在制造方提供的條件下進行應力退火（通常應力退火溫度的范圍為 800℃±20℃，退火時間為 2h，退火后隨爐冷卻）；但表 5 中的非耐熱磁疇細化法（如激光刻痕）生產(chǎn)的產(chǎn)品磁性能應按照 GB/T 13789 測試，試樣在測試前不需要進行應力退火。經(jīng)供需雙方協(xié)商，表 3、甘肅張掖表 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、甘肅張掖表 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 在磁場強度 H ＝ 800 A/m 條件下測試所得的磁極化強度 J800應符合表 3、甘肅張掖表 4、甘肅張掖表 5、甘肅張掖表 6、甘肅張掖表 7、甘肅張掖表 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度值 J800比 GB/T 3655 方法所測得的磁極化強度值偏低。7.1.5 同一產(chǎn)品在磁極化強度 1.7T、甘肅張掖同城頻率 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 進行轉(zhuǎn)換，轉(zhuǎn)換后的 P1.7/50和 P1.7/60應符合表 3、甘肅張掖同城表 4、甘肅張掖同城表 5、甘肅張掖同城表 6、甘肅張掖同城表 7、甘肅張掖同城表 8 和表 9 的規(guī)定