公开(公告)号：US4473416A

公开(公告)日：1984-09-25

申请号：US396062

申请日：1982-07-07

申请人： Yakichiro Kawamo ,  Jirou Harase

发明人： Yakichiro Kawamo ,  Jirou Harase

IPC分类号： C21D8/12 ,  H01F1/147 ,  H01F1/04

CPC分类号： C21D8/1222 ,  H01F1/14791 ,  C21D8/1261 ,  C21D8/1272

摘要： A process for producing an aluminum-bearing grain-oriented silicon steel strip from a silicon steel slab containing up to 0.02% carbon, 0.01 to 0.1% aluminum, 2.7 to 4.0% silicon, and 0.002 to 0.02% nitrogen, the balance being iron and unavoidable impurities, said slab optionally containing at least one of 0.01 to 0.5% antimony and 0.01 to 1.0% copper, said process comprising: recrystallization hot rolling said slab, said rolling being commenced when said slab has a temperature up to 1,250.degree. C., and effected at a total reduction rate of at least 80% with a plurality of passes, including at least one pass having a reduction rate of at least 35%, before said steel has a temperature of 900.degree. C.; strain accumulation finish hot rolling said steel at a total reduction rate of at least 40% and at a steel temperature up to 900.degree. C.; annealing said hot rolled steel continuously at a temperature of 700.degree. C. to 950.degree. C.; cold rolling said steel; annealing said cold rolled steel continuously at a temperature of 700.degree. C. to 900.degree. C. for primary recrystallization; and finish annealing said steel, an atmosphere gas containing at least 30% of nitrogen being introduced during the heating step of said finish annealing when a temperature of 800.degree. C. to 1,000.degree. C. prevails.

摘要翻译： 一种从含有高达0.02％碳，0.01％至0.1％铝，2.7％至4.0％硅和0.002％至0.02％氮的硅钢板生产含铝晶粒取向硅钢带的方法，余量为铁和 不可避免的杂质，所述板任选地含有0.01至0.5％的锑和0.01至1.0％的铜中的至少一种，所述方法包括：对所述板进行再结晶热轧，当所述板坯的温度高达1,250℃时开始轧制， 并且在所述钢的温度为900℃之前，以多次通过，总压下率至少为80％，包括至少一次通过率至少为35％。 应变累积热轧所述钢，总压下率至少为40％，钢温度高达900℃。 在700℃〜950℃的温度下连续退火所述热轧钢。 冷轧钢; 在700〜900℃的温度下连续退火冷轧，进行一次再结晶; 并且在800℃〜1000℃的温度下，在所述最终退火的加热工序中，含有至少30％的氮的气氛气体完成退火。

公开(公告)号：US4592789A

公开(公告)日：1986-06-03

申请号：US411001

申请日：1982-08-24

申请人： Yakichiro Kawamo ,  Yozo Suga ,  Tadao Nozawa ,  Tadashi Nakayama

发明人： Yakichiro Kawamo ,  Yozo Suga ,  Tadao Nozawa ,  Tadashi Nakayama

IPC分类号： H01F1/16 ,  C21D8/12 ,  H01F1/04

CPC分类号： C21D8/1272

摘要： In conventional processes for producing a grain-oriented electromagnetic steel strip or sheet, the carbon and silicon content of the starting material is such that .alpha.-.gamma. transformation takes place, said transformation formerly being belived to play an important role in, for example, the formation of AlN. Recently, attempts have been made to reduce the carbon content so as to simplify decarburization-annealing, but these attempts have not been successful.In the present invention, (1) an extremely low carbon content (C.ltoreq.0.02%) and an extremely low sulfur content (S.ltoreq.0.015%), as well as a low heating temperature of the starting material, and (2) a temperature gradient of at least 2.degree. C. per centimeter, which is generated parallel to the sheet surface and under which the growth of secondary recrystallized grains is completed, are combined. As a result of such combination, the following advantages are attained: (1) secondary recrystallization is attained without .alpha.-.gamma. transformation taking place; (2) a high magnetic flux density is attained; (3) a continuous-casting machine can be directly combined with a continuous hot-rolling mill; (4) decarburization-annealing can be simplified; and (5) no molten slag is formed during heating of a steel slab.

摘要翻译： 在用于制造晶粒取向的电磁钢带或片材的常规方法中，起始材料的碳和硅含量使得发生α-γ转化，所述转变以前被认为在例如 形成AlN。 近来，已经尝试减少碳含量以简化脱碳退火，但是这些尝试并不成功。 在本发明中，（1）极低的碳含量（C <= 0.02％）和极低的硫含量（S <= 0.015％）以及起始材料的低加热温度和（ 2）结合平行于片材表面并在其下完成二次再结晶晶粒的生长的每厘米至少2℃的温度梯度。 作为这种组合的结果，可获得以下优点：（1）在没有发生α-γ转化的情况下实现二次再结晶; （2）获得高磁通密度; （3）连铸机可直接与连续式热轧机组合; （4）可以简化脱碳退火; （5）钢板加热时不会形成熔渣。