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

電工鋼硅鋼片近20年來(lái)，我國(guó)硅鋼產(chǎn)業(yè)取得了長(zhǎng)足的進(jìn)步，這其中以首鋼、湖南懷化當(dāng)?shù)匚滗摵蛯氫摓榇?。得益于我?guó)鋼鐵行業(yè)全流程的技術(shù)進(jìn)步，這些企業(yè)在控制無(wú)取向硅鋼整體質(zhì)量穩(wěn)定性和取向硅鋼方面已經(jīng)具有較高技術(shù)實(shí)力。2014年我國(guó)硅鋼生產(chǎn)達(dá)到823萬(wàn)噸，高端產(chǎn)品有20~30萬(wàn)噸的進(jìn)口量，2015年，我國(guó)共生產(chǎn)電工鋼約836萬(wàn)噸，進(jìn)口量進(jìn)一步下降到14萬(wàn)噸。但是，與日本相比我國(guó)在高端電工鋼領(lǐng)域仍有不小的差距，這集中體現(xiàn)在高磁感無(wú)取向硅鋼、湖南懷化當(dāng)?shù)爻丸F損Hi-B取向硅鋼和高硅鋼等產(chǎn)品上。例如，新日鐵公司(現(xiàn)新日鐵住金)能夠?qū)崿F(xiàn)0.15~0.35mm系列厚度規(guī)格極低鐵損Hi-B取向電工鋼的穩(wěn)定供貨，引領(lǐng)取向硅鋼工藝發(fā)展。在特殊用途硅鋼方面，日本鋼管公司(現(xiàn)JFE)通過(guò)氣相沉積法(CVD)滲硅的方式實(shí)現(xiàn)了高硅鋼薄帶的供貨。隨著我國(guó)裝備制造業(yè)的產(chǎn)業(yè)升級(jí)，高端硅鋼產(chǎn)品的需求會(huì)越來(lái)越迫切。我國(guó)與日韓等鋼鐵強(qiáng)國(guó)在這一領(lǐng)域的競(jìng)爭(zhēng)將會(huì)更加激烈，這就要求我國(guó)相關(guān)科研人員通過(guò)革命性創(chuàng)新進(jìn)行下一代硅鋼生產(chǎn)技術(shù)的研發(fā)，引領(lǐng)世界電工鋼技術(shù)的發(fā)展。低鐵損、湖南懷化當(dāng)?shù)馗叽鸥须姍C(jī)用無(wú)取向硅鋼、湖南懷化當(dāng)?shù)乇∫?guī)格超低鐵損高磁感取向硅鋼和中高頻節(jié)能電器用高硅鋼是電工鋼產(chǎn)業(yè)的發(fā)展方向。