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    • 6. 发明申请
    • METHOD FOR MANUFACTURING HIGH SILICON GRAIN-ORIENTED ELECTRICAL STEEL SHEET WITH SUPERIOR CORE LOSS PROPERTY
    • 用于制造具有超级核心损耗特性的高硅晶粒电工钢板的方法
    • WO2004044252A1
    • 2004-05-27
    • PCT/KR2003/002413
    • 2003-11-11
    • POSCOCHOI, Kyu-SeungWOO, Jong-SooKIM, Jae-Kwan
    • CHOI, Kyu-SeungWOO, Jong-SooKIM, Jae-Kwan
    • C21D8/12
    • C23C10/30C21D8/1244C21D8/1255C21D8/1277C23C10/02C23C10/20C23C10/44C23C10/46
    • There is provided a method for manufacturing a high silicon grain-oriented electrical steel sheet. In a method for manufacturing a high silicon grain-oriented electrical steel sheet, comprising the steps of: reheating and hot-rolling a steel slab to produce a hot-rolled steel sheet; annealing the hot-rolled sheet and cold rolling the annealed steel sheet so as to adjust a thickness of the steel sheet; decarburization annealing the cold rolled steel sheet; and finish-annealing the decarburization annealed steel sheet for secondary recrystallization, the improved method further comprising the step of: coating a powder coating agent for siliconization on a surface of the decarburization annealed steel sheet in a slurry state, the powder coating agent including 100 part by weight of MgO powder and 0.5 - 120 part by weight of sintered powder of Fe-Si compound containing 25 70 wt.% Si sintered powder, the sintered powder having a grain size of -325 mesh; drying the resultant decarburization annealed steel sheet; and finish annealing the steel sheet under a conventional condition.
    • 提供了制造高硅晶粒取向电工钢板的方法。 在制造高硅晶粒取向电工钢板的方法中,包括以下步骤:对钢坯进行再加热和热轧以制造热轧钢板; 对该热轧板进行退火,对退火后的钢板进行冷轧,调整钢板的厚度; 冷轧钢板脱碳退火; 对用于二次再结晶的脱碳退火钢板进行最终退火,该改进方法还包括以下步骤:在浆料状态下在脱碳退火钢板的表面上涂覆硅化粉末涂料,所述粉末涂料包括100份 的MgO粉末和0.5〜120重量份含有25重量%Si烧结粉末的Fe-Si化合物的烧结粉末,烧结粉末的粒径为-325目; 干燥所得脱碳退火钢板; 并在常规条件下对钢板进行最终退火。
    • 7. 发明申请
    • NON-ORIENTED ELECTRICAL STEEL SHEETS WITH IMPROVED MAGNETIC PROPERTY AND METHOD FOR MANUFACTURING THE SAME
    • 具有改进的磁性的非定向电工钢板及其制造方法
    • WO2007074987A1
    • 2007-07-05
    • PCT/KR2006/005521
    • 2006-12-18
    • POSCO CO., LTD.BAE, Byung-KeunKIM, Jae-Kwan
    • BAE, Byung-KeunKIM, Jae-Kwan
    • C22C38/00
    • C22C38/02C21D8/1244C21D8/1261C21D8/1272C22C38/004C22C38/04C22C38/06C22C38/08C22C38/14C22C38/16
    • The present invention relates to a non-oriented electrical steel sheet, widely used as an iron core in electric devices, and to a method of manufacturing the same. The non-oriented electrical sheet includes 0.004 wt. % or less C; 1.0-3.5 wt. % Si; 0.02 wt. % or l ess P ; 0.001 wt. % or less S ; 0.2∼2.5 wt. % Al; 0.003 wt. % or less N; 0.004 wt. % or less Ti; Mn, in which the amount of thereof is represented by the following formula (1): 0.10+100 X S(wt. %) ≤ Mn(wt. %) ≤ 0.21+200 X S(wt. %) - (1); a balance of iron; and inevitable impurities. According to the present invention, final magnetic properties are greatly improved because fine precipitates are formed by S, the amount of Mn can be suitably determined in order to inhibit the formation of the fine precipitates, the formation of fine precipitate CuS is inhibited because precipitates CuS, MnS are formed by adding Sn, Ni and Cu, and a texture, which determines a temperature of annealing a hot rolled steel plate and magnetic properties, is controlled, thereby manufacturing an inexpensive and optimum non-oriented electrical steel sheet.
    • 本发明涉及广泛用作电气设备中的铁芯的无取向电工钢板及其制造方法。 无取向电工薄板包括0.004重量% %以下C; 1.0-3.5重量% %Si; 0.02重量% %或l ess P; 0.001重量% %以下S; 0.2〜2.5重量% %Al; 0.003重量% %以下N; 0.004重量% %以下Ti; Mn的含量由下式(1)表示:0.10 + 100×S(重量%)= Mn(重量%)= 0.21 + 200×S(重量%) - (1) 铁的平衡 和不可避免的杂质。 根据本发明,通过S形成微细的析出物,可以极大地改善最终的磁特性,为了抑制微细析出物的形成,可以适当地确定Mn的量,形成微细的沉淀CuS被抑制,因为析出CuS 通过添加Sn,Ni和Cu形成MnS,并且控制确定热轧钢板的退火温度和磁特性的织构,从而制造廉价且最佳的无取向电工钢板。
    • 8. 发明申请
    • APPARATUS AND METHOD FOR REFINING MAGNETIC DOMAIN OF ELECTRICAL STEEL SHEET
    • 电工钢板磁性体精制设备及方法
    • WO2009082155A1
    • 2009-07-02
    • PCT/KR2008/007597
    • 2008-12-23
    • POSCOCHA, Sang-YunKIM, Jae-KwanKWON, Oh-Yeoul
    • CHA, Sang-YunKIM, Jae-KwanKWON, Oh-Yeoul
    • C21D8/12
    • C21D8/12C21D1/04C21D10/00
    • Disclosed herein is an apparatus for refining a magnetic domain of an electrical steel sheet and a method of refining a magnetic domain of an electrical steel sheet. The apparatus for refining a magnetic domain of an electrical steel sheet includes: a laser beam emission unit; a toroidal mirror for converting the laser beam emitted from the laser beam emission unit into a first elliptical laser beam; a switch mirror for transferring the first elliptic laser beam transferred from the toroidal mirror to a pair of scan mirrors; the pair of scan mirrors for scanning the first elliptical laser beam transferred from the switch mirror and then transferring the scanned first elliptical laser beam; a cylindrical mirror for converting the first elliptical laser beam transferred from the pair of scan mirrors into a second elliptical laser beam and then irradiating the electrical steel sheet with the second elliptical laser beam.
    • 这里公开了一种电解钢板的磁畴的精制装置和电磁钢板的磁畴的精制方法。 用于精制电磁钢板的磁畴的装置包括:激光束发射单元; 环形镜,用于将从激光束发射单元发射的激光束转换成第一椭圆激光束; 用于将从环形反射镜传送的第一椭圆激光束传送到一对扫描镜的开关镜; 一对扫描镜,用于扫描从开关镜转移的第一椭圆激光束,然后传送扫描的第一椭圆激光束; 用于将从一对扫描镜转移的第一椭圆激光束转换为第二椭圆激光束并随后用第二椭圆激光束照射电工钢板的圆柱形镜。