電工鋼硅鋼片：電工鋼鋼板經(jīng)沖片、河南開(kāi)封本地剪切、河南開(kāi)封本地彎曲會(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）、河南開(kāi)封本地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Ultra-thin series: B15AHT1000, B15AHT1200, B15AT1000, B15AT1200B15AT1500, B15AT1550, B20AHT1000, B20AHT1200, B20AT1000, B20AT1200, B20AT1500, 20WTG1200, 20WTG1500 20WTG1550 B25AHV1200 B25AHV1300, B27AHV1400, B27AV1400, B30AHV1500 B30AHV1400, B35AV1700 B35AV1800High performance series: B35AH300, B50AH300, 50AH470, 50AH600, 50AH800, B50AH470, B50AH600, B50AH800, B50AR300, B50AR600, B50AR500, B50AR350, B20AT15000.35 series: B35A200, B35A210, B35A230, B35A250, B35A270,B35A300, B35A360, B35A440, B35A550, B35AH300, B35AR300, B35AY-10.5 series: B50A250, B50A270, B50A290, B50A310, B50A350, B50A400, B50A470, B50A600, B50A700, B50A800, B50A1000, B50A13000.65 series: B65A470, B65A530, B50A600B65A700, B65A800 B65A1000, B65A1300Super thick Series: 70WK340, 75WK400, 80WK420, 85WK450, 10W800 WFC-100A, silicon steel sheet performance: A low iron loss. As an important indicator of quality, each country divides the grade by the iron loss value. The lower the iron loss, the higher the grade and the higher the quality.B. High magnetic induction strength. Under the same magnetic field, the silicon steel sheet with high magnetic sensitivity can be obtained. The volume and weight of the iron core of the motor or transformer made by it are relatively small, which can save silicon steel sheet, copper wire and insulating materials, etc.C. High stacking coefficient. The surface of the silicon steel sheet is smooth, flat and uniform in thickness, which improves the stacking coefficient of the iron core.D. Good punching property. This is more important for manufacturing small and micro motor iron cores.E. The surface has good adhesion and weldability to the insulating film.