電工鋼硅鋼片：電工鋼鋼板經(jīng)沖片、江蘇無(wú)錫本地剪切、江蘇無(wú)錫本地彎曲會(huì)引入殘余應(yīng)力，導(dǎo)致磁性能劣化。應(yīng)力退火（SRA）可以殘余應(yīng)力對(duì)磁疇移動(dòng)與轉(zhuǎn)動(dòng)的阻礙作用，恢復(fù)電磁性能。E.2 在鋼板或疊鐵心的狀態(tài)下進(jìn)行應(yīng)力退火的注意事項(xiàng)如下。1). 避免氧化和滲碳為了防止氧化應(yīng)力退火應(yīng)該在保護(hù)氣氛下進(jìn)行，通常是 10％以下氫氣（H2）和 90％以上氮?dú)猓∟2）、江蘇無(wú)錫本地100％氮?dú)猓∟2）或者氨分解氣氛的非爆炸性保護(hù)氣氛，露點(diǎn)控制在 0℃以下。沖壓加工過(guò)程引入的沖壓油在退火前應(yīng)完全去除，防止在退火中發(fā)生滲碳，劣化產(chǎn)品磁性。2). 退火溫度及保持時(shí)間退火溫度指材料溫度，750℃為宜。為使得鋼板各部分退火均勻，需要調(diào)整溫度與保持時(shí)間。溫度太低不足以殘余應(yīng)力的影響，溫度太高會(huì)破壞涂層絕緣性。3). 冷卻時(shí)間應(yīng)當(dāng)避免急劇冷卻使材料產(chǎn)生應(yīng)力應(yīng)變。冷卻時(shí)間根據(jù)電工鋼退火數(shù)量進(jìn)行調(diào)整。對(duì)于退火小噸位數(shù)量時(shí)，可按每小時(shí)不超過(guò) 25℃ 的冷卻速度冷卻到 350℃,以避免冷卻過(guò)程中產(chǎn)生應(yīng)力應(yīng)變。對(duì)于退火大噸位數(shù)量時(shí)，應(yīng)采取更加緩慢的冷卻速率，以期獲得 效果。

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(dòng)機(jī)、發(fā)電機(jī)、變壓器、扼流圈、電磁機(jī)構(gòu)、繼電器及測(cè)量?jī)x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(dòng)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(dòng)機(jī)；冷軋無(wú)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(dòng)機(jī)，大、中、小型交、直流電動(dòng)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(wú)線電高頻變壓器。

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