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    • 2. 发明授权
    • Method for producing a hot strip
    • 热轧带钢生产方法
    • US06835253B1
    • 2004-12-28
    • US10111119
    • 2002-07-22
    • Rudlof KawallaBernhard EnglThomas HellerWolfgang RasimEberhard Sowka
    • Rudlof KawallaBernhard EnglThomas HellerWolfgang RasimEberhard Sowka
    • C21D804
    • C21D8/041B21B1/46B21B45/004B22D11/041B22D11/1213B22D11/225C21D8/0426C21D8/0436C22C38/04
    • The invention relates to a method for producing a hot strip, in particular for producing a hot strip intended for the production of a cold strip with good deep-drawing characteristics; in which a steel melt comprising (in % by weight) C:≦0.07%, Si:≦0.5%, Mn:≦2.5%, Al:≦0.1%, N:≦0.01%, P:≦0.025, B:≦0.05, if need be up to a total of 0.35% of Nb, Ti and V, with the remainder being iron and the usual impurities is melted; in which the steel melt is continually output in one strand (S) from a permanent casting mould (1); in which the cast strand (S) immediately after discharge from the permanent casting mould (1) is led along a cooling line (2); in which the strand (S) is intensively cooled down to a temperature of Ar1±25 K at a cooling rate (aLM) of at least 3 K/s; in which, following its intensive cooling, the strand (S) is cooled by exposure to air for at least 30 seconds; and in which the strand (S) itself or thin slabs (D) divided off the strand (S) is/are reheated in a soaking furnace (5) before the strand (S) or the thin slabs (D) are hot rolled to form hot strip. The method according to the invention makes it possible, during processing of low-alloyed low-carbon steels, to reduce the required temperature in the soaking furnace such that the stress on the furnace is reduced without there being any reduction in the quality of the hot strip produced, or of the cold strip made from said hot strip.
    • 本发明涉及一种用于生产热带的方法,特别是用于生产用于生产具有良好深拉深特性的冷带的热带; 其中包含(重量%)C:<= 0.07%,Si:<= 0.5%,Mn:≤2.5%,Al:≤0.1%,N:<= 0.01%,P: = 0.025,B:<= 0.05,如果需要总共0.35%的Nb,Ti和V,余量为铁,通常的杂质熔化; 其中钢熔体从永久铸模(1)以一股(S)连续输出; 其中从永久铸造模具(1)排出之后的铸造线(S)沿着冷却线(2)被引导; 其中链(S)以至少3K / s的冷却速率(aLM)被强制冷却至Ar1±25K的温度; 其中,在强烈冷却之后,通过暴露于空气中将链(S)冷却至少30秒; 在将钢丝(S)或薄板坯(D)热轧成为(W)之前,在均热炉(5)中再次加热从钢丝(S)上分离出的坯料(S)本身或薄板坯(D) 形成热带。 根据本发明的方法,在低合金化低碳钢的加工过程中,可以在均热炉中降低所需的温度,从而降低炉子上的应力,而不会降低热的质量 或者由所述热带制成的冷带条。
    • 6. 发明授权
    • Ferritic Cr-containing steel sheet having excellent ductility, formability, and anti-ridging properties
    • 具有优异的延展性,成形性和抗皱纹性的铁素体含Cr钢板
    • US06500280B2
    • 2002-12-31
    • US09946243
    • 2001-09-05
    • Hiroki OtaYasushi KatoTakumi UjiroSusumu Satoh
    • Hiroki OtaYasushi KatoTakumi UjiroSusumu Satoh
    • C21D804
    • C21D8/0205C21D8/0231C21D8/0236C21D8/0263C21D8/0405C22C38/001C22C38/004C22C38/18C22C38/46
    • Producing a ferritic Cr-containing steel sheet having excellent ductility, formability, and anti-ridging properties, and exhibiting excellent surface quality after forming, wherein a ferritic Cr-containing steel sheet contains, by mass %, about 0.001 to 0.12% of C, about 0.001 to 0.12% of N, and about 9 to 32% of Cr, and has a crystal grain structure in which in a section of a hot-rolled annealed steel sheet in the thickness direction parallel to the rolling direction, an elongation index of crystal grains is 5 or less at any position, and in a section of a cold-rolled annealed steel sheet in the thickness direction parallel to the rolling direction, any colony of coarse grains oriented in the rolling direction has an aspect ratio of 5 or less. The production method includes hot rolling, pre-rolling by cold or warm rolling with a rolling reduction of about 2 to 15%, hot-rolled sheet annealing, cold rolling, and finish annealing; preferably the FDT of hot rolling is 850° C., and 0.0002 to 0.0030% of B is added.
    • 制造具有优异的延展性,成形性和抗皱性的铁素体系Cr系钢板,成形后表现出优异的表面质量,其中铁素体含Cr钢板以质量%计含有C:0.001〜0.12% 约0.001〜0.12%的N和约9〜32%的Cr,并且具有在热轧退火钢板的厚度方向平行于轧制方向的截面中的延伸率指数 在任何位置的晶粒为5以下,在与轧制方向平行的厚度方向的冷轧退火钢板的截面中,在轧制方向取向的粗晶粒的任意集合都具有5以下的纵横比 。 制造方法包括热轧,冷轧或暖轧预压,轧制压下率为2〜15%左右,热轧板退火,冷轧,成品退火; 优选热轧的FDT为850℃,添加0.0002〜0.0030%的B。