Methods for annealing and pickling high manganic cold rolled steel sheet
    1.
    发明授权
    Methods for annealing and pickling high manganic cold rolled steel sheet 失效
    退火和酸洗高锰钢冷轧钢板的方法

    公开(公告)号:US5810950A

    公开(公告)日:1998-09-22

    申请号:US894829

    申请日:1997-08-28

    摘要: Methods for annealing and pickling high manganese cold rolled steel sheets for use in automobiles and electronic panels in which a superior formability and high strengths are required are disclosed. That is, the invention provides a method for annealing a cold rolled high manganese steel sheet, in which, after cold-rolling a high manganese steel of Fe--Mn--Al--C series, the annealing atmospheric gas is adjusted during an annealing so as to minimize the thickness of a surface oxide layer, and an oxide layer removing agent such as aluminum nitride is spread into the oxide layer, so that the surface oxide layer can be easily removed. The invention further provides a method for pickling a cold rolled high manganese steel sheet, in which the surface oxide layer formed on the cold rolled high manganese steel sheet is uniformly removed with a mild aqueous solution of chloric acid, thereby improving the surface quality of the steel sheet, and saving the pickling facility cost. When the high manganese steel sheet is annealing at a temperature of 500.degree.-1000.degree. C., the annealing atmosphere consists of 100% of nitrogen or 50% or more of nitrogen and a balance of hydrogen. The high manganese steel sheet is pickled for 30-90 seconds within an aqueous solution of chloric acid having an acid concentration of 0.06-0.8 weight % and a temperature of 15.degree.-50.degree. C.

    摘要翻译: PCT No.PCT / KR96 / 00242 Sec。 371日期1997年8月28日 102(e)日期1997年8月28日PCT提交1996年12月18日PCT公布。 公开号WO97 / 24467 PCT 日期1997年7月10日公开了用于需要优异成形性和高强度的汽车和电子面板中使用的高锰冷轧钢板的退火和酸洗方法。 也就是说,本发明提供了一种冷轧高锰钢板的退火方法,其中,在对Fe-Mn-Al-C系列的高锰钢进行冷轧后,退火时调整退火气体气体, 为了最小化表面氧化物层的厚度,并且诸如氮化铝的氧化物层去除剂扩散到氧化物层中,使得表面氧化物层可以容易地去除。 本发明还提供了一种用于酸洗冷轧高锰钢板的方法,其中形成在冷轧高锰钢板上的表面氧化物层用温和的氯酸水溶液均匀地除去,从而提高了 钢板,节省酸洗设备成本。 当高锰钢板在500-1000℃的温度下退火时,退火气氛由100%的氮气或50%或更多的氮气和余量的氢气组成。 在酸浓度为0.06〜0.8重量%,温度为15〜50℃的氯酸水溶液中酸洗高锰钢片30〜90秒。

    Process for manufacturing high manganese hot rolled steel sheet without
any crack
    2.
    发明授权
    Process for manufacturing high manganese hot rolled steel sheet without any crack 失效
    制造高锰热轧钢板的工艺无裂纹

    公开(公告)号:US5647922A

    公开(公告)日:1997-07-15

    申请号:US553334

    申请日:1995-11-22

    摘要: A high manganese steel having superior hot workability is disclosed, in which small amounts of the alloying elements are added into a high manganese steel of Fe-Mn-Al-C system, so that the rupture strength of the grain boundaries of columnar crystals can be improved, thereby realizing an improved hot workability. Further, a process for manufacturing a high manganese hot rolled steel sheet is disclosed, in which the above mentioned high manganese steel is subjected to be controlled the initial hot rolling conditions during a hot rolling, so that large cracks would not be generated on the edges and on the surface of the hot rolled steel sheet. The process for manufacturing a hot rolled high manganese steel without any cracks includes the following the steps. That is, the process includes the steps of: preparing the ingot or the continuous casting slabs of the conventional Fe-Mn-Al-C steel with one or more elements selected from a group consisting of 0.0005-0.04% of B, 0.0005-0.050% of Ti, 0.0005-0.050% of Zr, 0.0005-0.040% of La, 0.0005-0.040% of Ce, and 0.0005-0.030% of Ca; heating the ingot or the continuous casting slab to a temperature range of 1150.degree.-1300.degree. C.; carrying out a hot rolling by applying a low reduction ratio below 7% per pass and an average strain rate below 2.0 sec.sup.-1 per pass, until a total reduction ratio reaches 40%; and carrying out a hot rolling by the high reduction ratio after reaching the total reduction ratio of 40%.

    摘要翻译: PCT No.PCT / KR95 / 00027 Sec。 371日期:1995年11月22日 102(e)日期1995年11月22日PCT 1995年3月25日PCT公布。 第WO95 / 26423号公报 日期1995年10月5日公开了一种具有优异的热加工性的高锰钢,其中少量的合金元素被添加到Fe-Mn-Al-C系的高锰钢中,使得晶界的断裂强度 可以提高柱状晶体,从而实现改进的热加工性。 此外,公开了一种用于制造高锰热轧钢板的方法,其中在热轧期间对上述高锰钢进行初始热轧条件的控制,从而不会在边缘产生大的裂纹 并且在热轧钢板的表面上。 制造没有任何裂纹的热轧高锰钢的方法包括以下步骤。 也就是说,该方法包括以下步骤:用一种或多种选自以下的元素制备常规Fe-Mn-Al-C钢的锭或连续铸造板:0.0005-0.04%的B,0.0005-0.050 Ti:0.0005〜0.050%,La:0.0005〜0.040%,Ce:0.0005〜0.040%,Ca:0.0005〜0.030% 将锭或连铸板加热至1150〜-1300℃的温度范围。 通过每次通过低于7%的低压比和每次通过低于2.0秒-1的平均应变速率进行热轧,直到总减速比达到40%; 并且在达到总减速比40%之后通过高减速比进行热轧。