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    • 6. 发明公开
    • VERFAHREN ZUR HERSTELLUNG EINES AUFGESTICKTEN VERPACKUNGSSTAHLS
    • EP3221477A1
    • 2017-09-27
    • EP15747457.8
    • 2015-08-03
    • ThyssenKrupp Rasselstein GmbHthyssenkrupp AG
    • MASSICOT, BlaiseKÖHL, ManuelKAUP, BurkhardSAUER, ReinerKLEMMER, RicardaKIEWITZ, Chrysanthus
    • C21D8/02C21D9/46C22C38/00
    • The invention relates to a method for producing a nitrided packaging steel from a hot-rolled steel product with a carbon content of 400 to 1200 ppm, characterized by a cold-rolling of the steel product to a flat steel product, subsequent recrystallization annealing of the cold-rolled flat steel product in an annealing furnace, in particular a continuous annealing furnace, wherein a nitrogen-containing gas is supplied into the annealing furnace and is directed at the flat steel product in order to introduce unbonded nitrogen into the flat steel product in an amount corresponding to a concentration of more than 100 ppm, or to increase the amount of unbonded nitrogen in the flat steel product to a concentration of more than 100 ppm, and subsequent cooling of the recrystallized annealed flat steel product at a cooling rate of at least 100 K/s directly after the recrystallization annealing. Using this method, cold-rolled flat steel products may be produced for packaging purposes with a tensile strength of more than 650 MPa and in particular between 700 and 850 MPa.
    • 一种由含碳量为400-1200ppm的热轧钢产品生产渗氮包装钢的方法,该方法利用将钢产品冷轧至扁钢产品,随后对冷轧扁钢进行再结晶退火 产品在退火炉中,特别是连续退火炉中。 向退火炉内供给含氮气体,导向扁钢产品以将相当于浓度超过100ppm的量的未结合氮引入到扁钢产品中,或者增加未结合氮的量 扁钢产品浓度大于100ppm,随后在再结晶退火后立即以至少100K / s的冷却速率冷却再结晶退火的扁钢产品。 使用这种方法,冷轧扁钢产品可以用于包装目的,其抗拉强度大于650MPa,特别是在700-850MPa之间。