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. 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

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(gòu)、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(zhuǎn)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(shù)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。

電工鋼硅鋼片根據(jù)生產(chǎn)方式可分為熱軋電工鋼和冷軋電工鋼。熱軋硅鋼片因其性能落后近年已經(jīng)逐步淘汰。根據(jù)晶體取向聚集程度將硅鋼分為無取向和取向是為廣泛接受的方法。冷軋無取向硅鋼是指0.5％~4.0％(Si＋Al)的合金，冷軋至0.65mm、山東臨沂同城0.5mm和0.35mm后經(jīng)退火涂層后制成。相比取向硅鋼，其晶粒織構(gòu)類型較為漫散，各個方向上具有較為均勻的磁性能，而且磁各向異性較低，主要用作各類型電機和發(fā)電機的鐵芯疊片。冷軋產(chǎn)品厚度精度，尺寸公差等級，表面光滑度都達到較高水平，從而提高了產(chǎn)品疊片系數(shù)和材料的磁性能。冷軋無取向硅鋼生產(chǎn)工藝流程圖如圖1所示。