電工鋼硅鋼片絕緣涂層特性7.2.1 絕緣涂層狀態(tài)產(chǎn)品通常以?xún)擅嫱糠蠼^緣涂層狀態(tài)交貨，涂層種類(lèi)見(jiàn)表 2。絕緣涂層應(yīng)可耐受絕緣漆、內(nèi)蒙古興安當(dāng)?shù)刈儔浩饔?、?nèi)蒙古興安附近機(jī)械油等介質(zhì)的侵蝕。本文件規(guī)定的絕緣涂層與國(guó)內(nèi)外相關(guān)技術(shù)規(guī)范規(guī)定絕緣涂層的近似對(duì)照可參見(jiàn)附錄 A(資料性附錄)，無(wú)取向電工鋼絕緣涂層的特性見(jiàn)附錄 B(資料性附錄)。絕緣涂層的厚度、內(nèi)蒙古興安附近自粘接涂層的剝離強(qiáng)度等技術(shù)要求如有特殊要求應(yīng)在訂貨時(shí)協(xié)商，并在合同中注明。7.2.2 絕緣涂層附著性根據(jù)附錄 C（無(wú)取向電工鋼絕緣涂層附著性檢測(cè)和評(píng)級(jí)方法），產(chǎn)品的絕緣涂層的附著性級(jí)別按照附著性由高至低分為 A、內(nèi)蒙古興安附近B、內(nèi)蒙古興安附近C、內(nèi)蒙古興安附近D 四個(gè)級(jí)別。供貨時(shí)，產(chǎn)品涂層的附著性級(jí)別 應(yīng)達(dá)到C 級(jí)。在剪切過(guò)程和供方規(guī)定的熱處理?xiàng)l件下進(jìn)行熱處理時(shí)，涂層不得有大面積脫落，但是在剪切邊緣位置，涂層的輕微碎裂則允許存在。7.2.3 涂層絕緣電阻涂層絕緣電阻分為表面絕緣電阻和層間電阻，表面絕緣電阻單位為Ω·cm2/面，層間電阻單位為Ω·cm2/片，理論上，層間電阻是表面絕緣電阻的 2 倍。根據(jù)需方要求，經(jīng)供需雙方協(xié)商，可進(jìn)行涂層絕緣電阻的檢測(cè)，并在合同中注明涂層表面絕緣電阻或?qū)娱g電阻的小值

電工鋼硅鋼片：比總損耗(鐵損) specific total loss (iron loss)比總損耗是在磁極化波形保持正弦，其峰值和頻率為特定值時(shí)，單位質(zhì)量材料所消耗的總功率，比總損耗用符號(hào) P(Jm/f)表示，單位為 W/kg。例：P1.5/50表示在 磁極化強(qiáng)度為 1.5T、內(nèi)蒙古興安當(dāng)?shù)仡l率為 50Hz 時(shí)的比總損耗。3.2 磁極化強(qiáng)度 magnetic polarizationQ/BQB 480－20212磁極化強(qiáng)度是指試樣受交變磁化時(shí)，特定磁場(chǎng)強(qiáng)度峰值的磁極化強(qiáng)度峰值，其符號(hào)為J(H)，單位為 T(特斯拉)。例：J5000表示對(duì)應(yīng)于磁場(chǎng)強(qiáng)度峰值為 5000A/m 下的磁極化強(qiáng)度峰值。4 分類(lèi)本文件的材料的等級(jí)是根據(jù)磁極化強(qiáng)度在1.5T、內(nèi)蒙古興安當(dāng)?shù)仡l率在50Hz下的 比總損耗名義值P1.5/50(W/kg)、內(nèi)蒙古興安當(dāng)?shù)夭牧瞎Q(chēng)厚度進(jìn)行牌號(hào)分類(lèi)，并按產(chǎn)品特性細(xì)分為普通型、內(nèi)蒙古興安當(dāng)?shù)貞?yīng)力退火型和型三類(lèi)。

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