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

電工鋼硅鋼片硅鋼性能指標(biāo)電工鋼疊片鐵芯與銅線通過電磁感應(yīng)做功，鐵芯通過形成交變磁場發(fā)揮作用。鐵芯運(yùn)行過程中自身耗能和鐵芯磁化能力決定電器設(shè)備核心性能，如功率、河南許昌體積、河南許昌效率、河南許昌質(zhì)量以及綜合運(yùn)行成本。所以，電工鋼的性能指標(biāo)要求有下列幾項(xiàng)：1) 鐵芯損耗P：電工鋼鐵芯在勵(lì)磁與退磁過程中額外消耗電能轉(zhuǎn)化成熱量稱為鐵損，單位為W/kg，是劃分產(chǎn)品牌號(hào)的主要依據(jù)。鐵損由磁滯損耗Ph、河南許昌渦流損耗Pe和反常損耗Pa組成。三種鐵損分別與晶粒尺寸、河南許昌有利織構(gòu)比例和板帶質(zhì)量對(duì)應(yīng)。所以，取向和無取向電工鋼中這三種損耗占比不同，如無取向硅鋼的鐵損以Ph為主，取向硅鋼中則以Pe為主。根據(jù)使用條件不同，無取向硅鋼的鐵損保證值取P1.5/50，即硅鋼片在50Hz交變磁場下磁化到1.5T時(shí)所消耗的電能，而取向硅鋼相應(yīng)的鐵損保證值為P1.7/50。

電工鋼硅鋼片1961~1994年主要是高磁感取向硅鋼（Hi-B）的發(fā)展階段。1953年，日本新日鐵公司田中悟等證明以AIN為主要抑制劑和一次大壓下率冷軋工藝方案有可能制成更高磁性的取向硅鋼。1961年在引進(jìn)Armco 基礎(chǔ)上，首先試制AlN＋MnS綜合抑制劑的高磁感取向硅鋼。1964年開始生產(chǎn)并命名為Hi-B，但磁性不穩(wěn)定。自1968年新日鐵公司開發(fā)高磁感取向硅鋼產(chǎn)品后，日本冷軋電工鋼在產(chǎn)品質(zhì)量、河南許昌制造技術(shù)和設(shè)備、河南許昌新技術(shù)開發(fā)、河南許昌實(shí)驗(yàn)研究及測試技術(shù)等方面都已超過美國，在世界上處于 領(lǐng)先地位。