電工鋼硅鋼片：比總損耗(鐵損)specific total loss (iron loss)比總損耗是指磁極化強(qiáng)度按正弦變化，其峰值和頻率為特定值時，單位質(zhì)量材料所吸收的總功率，比總損耗用符號 P (Jm/f)表示，單位為 W/kg（或 W/lb）。例：P1.7/50表示在磁極化強(qiáng)度在 1.7T、廣東茂名當(dāng)?shù)仡l率在 50Hz 下測得的單位 kg（或 lb）試樣的比總損耗；P1.7/60表示在磁極化強(qiáng)度在 1.7T、廣東茂名當(dāng)?shù)仡l率在 60Hz 下測得的單位 kg（或 lb）試樣的比總損耗。3.2 磁極化強(qiáng)度(磁感應(yīng)強(qiáng)度)magnetic polarization (magnetic induction)磁極化強(qiáng)度是指試樣受交變磁場磁化時，特定磁場強(qiáng)度峰值的磁極化強(qiáng)度峰值，其符號為 J(H)，單位為 T(特斯拉)。例：J800表示對應(yīng)于磁場強(qiáng)度 H 為 800A/m（用峰值表示）下的磁極化強(qiáng)度。3.3 比視在功率 specific apparent power對于設(shè)定的磁極化強(qiáng)度和頻率值，磁化單位質(zhì)量的鐵芯所消耗的交流電源總功率為比視在功率，其符號為 Ss，單位為 VA/kg。例：Ss1.7/50表示磁極化強(qiáng)度在 1.7T、廣東茂名當(dāng)?shù)仡l率在 50Hz 下測得的單位 kg 試樣的比視在功率。3.4 A 計權(quán)磁致伸縮速度水平 A-weighted magnetostriction velocity level,LVA 當(dāng)磁極化強(qiáng)度隨時間按正弦規(guī)律變化，其峰值為某一標(biāo)定值，變化頻率為某一標(biāo)定頻率時，單位長度電工鋼片（帶）沿磁化方向上發(fā)生磁致伸縮所引起的表面振動聲壓水平為 A 計權(quán)磁致伸縮速度水平。

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(lǐng)域中應(yīng)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(jī)、發(fā)電機(jī)、變壓器、扼流圈、電磁機(jī)構(gòu)、繼電器及測量儀表中電機(jī)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(jī)，壓縮電機(jī)，通用馬達(dá)，小型精密電機(jī)，電動汽車，壓縮機(jī)，通用電機(jī)，電源變壓器，精密變壓器，節(jié)能電機(jī)，焊機(jī)變壓器，穩(wěn)壓器，磁性密封器，加速器用電磁鐵，汽車電機(jī)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(jī)；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(jī)、電動機(jī)，大、中、小型交、直流電動機(jī)；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。