27SQG090

电工钢硅钢片电工钢板的磁感应强度高，铁芯的激磁电流（也称空载电流）降低，铜损和铁损都下降，可节省电能。当电机和变压器功率不变时，磁感应强度高，设计Bm可提高，铁芯截面积可缩小，这使铁芯体积减小和重量减轻，并节省电工钢板、导线、绝缘材料和结构材料用量，可降低电机和变压器的总损耗和制造成本，并且有利于大变压器和大电机的制造、安装和运输。硅钢性能的要求主要是：1、铁损低，这是硅钢片质量的重要指标。各国都根据铁损值划分牌号，铁损愈低，牌号愈高。2、较强磁场下磁感应强度（磁感）高，这使电机和变压器的铁芯体积与重量减小，节约硅钢片、铜线和绝缘材料等。3、表面光滑、平整和厚度均匀，可以提高铁芯的填充系数。4、冲片性好，对制造微型、小型电动机更为重要。5、表面绝缘膜的附着性和焊接性良好，能防蚀和改善冲片性

电工钢硅钢片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

电工钢硅钢片硅钢按Si质量分数分类分为Si＜0.5％的电工钢和0.5~4.5％Si的硅钢两类，两者通称为电工钢板。前者在制造电磁性能要求不高的民用小型电器领域有着广泛的需求，此类硅钢片的特点在于硅含量明显低于常规电工钢，制备工艺流程简单，成本较低，与普碳钢类似。后者包含的种类、附近牌号极为复杂。高硅钢是指4.5％~6.7％Si的Si-Fe合金，具有在高频下铁损明显降低、附近 磁导率高、附近矫顽力低、附近磁性能极为优异的特点，主要用来制造高频电机、附近高频变压器、附近扼流线圈和高频磁屏蔽等。但由于Si含量过高，室温条件下塑性极差，无法轧制成形。6.5％Si因为其独特的磁性能而自成体系，目前仅有少量通过渗硅工艺制备的无取向6.5％Si-Fe合金材料可以成卷供应，更具性能优势的取向6.5％Si-Fe合金制备则更为困难。