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    • 7. 发明申请
    • High strength steel product with improved formability and steel manufacturing process
    • 高强度钢产品,具有改进的成型性和钢铁制造工艺
    • US20050199319A1
    • 2005-09-15
    • US10798039
    • 2004-03-11
    • Barton ThomsonJames Johnston
    • Barton ThomsonJames Johnston
    • B21B1/46C21D8/00
    • C21D8/0263C21D8/0226C21D2211/004
    • A process and apparatus are disclosed for manufacturing high strength low alloy (HSLA) flat rolled steel products having high yield strength and formability. A preferred process comprises the formation of an as-cast product; reducing the thickness of the as cast product in a roughing mill; holding the temperature of the rough-reduced product at a temperature sufficient to permit substantially complete recrystallization of austenite grains in the rough-reduced product; followed by a final reduction step in a hot rolling strip mill. In this process, there is little or no precipitation of microalloy until after the material passes through the strip mill and therefore the material being rolled is relatively soft compared to known processes. Therefore, less power is required to roll the material to its final dimensions, with a corresponding improvement in dimensional control. The material produced according to this process has a strength of at least about 70 ksi, more preferably at least about 80 ksi, and a formability as measured by n-value within the range of from about 0.1 to about 0.15.
    • 公开了用于制造具有高屈服强度和成形性的高强度低合金(HSLA)扁平轧制钢产品的方法和装置。 优选的方法包括形成铸塑产品; 减少粗轧机中铸造产品的厚度; 将粗减量产品的温度保持在足以允许粗略减少的产品中的奥氏体晶粒基本上完全再结晶的温度; 然后在热轧带钢轧机中进行最终还原步骤。 在这个过程中,直到材料通过带材轧机之后,微合金几乎没有或没有析出,因此与已知方法相比,被轧制的材料相对较软。 因此,需要较少的功率来将材料轧制到其最终尺寸,并具有尺寸控制的相应改进。 根据该方法生产的材料具有至少约70ksi,更优选至少约80ksi的强度,以及在约0.1至约0.15范围内由n值测量的成形性。