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    • 4. 发明公开
    • 내리징성 및 성형성이 우수한 페라이트계 스테인리스강판및 그 제조방법
    • 不锈钢不锈钢板和方法
    • KR1020010062057A
    • 2001-07-07
    • KR1020000072383
    • 2000-12-01
    • 제이에프이 스틸 가부시키가이샤
    • 히라타노리마사요코타다케시가토야스시우지로다쿠미사토스스무
    • C22C38/40
    • C21D6/002C21D8/0205C21D8/0226C21D8/0236C21D8/0263C21D8/0273C21D8/0405C22C38/002C22C38/40
    • PURPOSE: A ferritic stainless steel plate having excellent ridging resistance and formability as well as a manufacturing method thereof are provided with no particular requirement of special chemical compositions such as reduced content of C or N, in addition of Ti or Nb, high purification or control of the Mn/Si rates. CONSTITUTION: The ferritic stainless plate containing a plurality of {111} orientation colonies comprises an assembly of adjacent crystals in which the angle of the direction vector of each crystal relative to an orientation vector vertical to the rolling surface is within about 15 degrees, in which the area ratio of a {111} orientation colony measured for cross section in the direction of the plate thickness cut into the rolling direction is about 30% or more in the regions of between about 1/8 to 3/8 and between 5/8 to 7/8 of the plate thickness within the cross section in the direction of the plate thickness. The method of manufacturing a ferritic stainless steel plate having excellent ridging resistance and formability comprises rough rolling and finish rolling slabs in hot rolling, applying annealing and cold rolling to the resulting hot rolled plates, and applying finish annealing, wherein rolling is conducted at a rolling reduction in at least one pass in rough rolling step of hot rolling of about 30% or more, and maintaining a temperature difference between the center of plate thickness and the plate surface of about 200 deg.C or less in pass where rolling reduction is maximum.
    • 目的:提供具有优异的耐皱纹性和成形性的铁素体不锈钢板及其制造方法,其特征在于不需要特殊的化学成分,例如除了Ti或Nb之外还含有C或N的含量降低,高纯化或控制 的Mn / Si率。 构成:包含多个{111}取向菌落的铁素体不锈钢板包括相邻晶体的组合,其中每个晶体的<111>方向矢量相对于垂直于滚动表面的取向矢量的角度在约15度内 ,其中在沿着轧制方向切割的板厚方向上测量的{111}取向菌落面积比在约1/8至3/8之间的区域中为约30%以上, 在板厚方向的横截面内的板厚度为5/8至7/8。 制造具有优异抗皱性和成形性的铁素体不锈钢板的方法包括在热轧中进行粗轧和精轧板坯,对所得热轧板进行退火和冷轧,并进行最终退火,其中轧制在轧制 将热轧粗轧工序中的至少一次通过减少约30%以上,并且在轧制压下量最大的通过中将板厚中心与板面之间的温差保持在约200℃以下 。
    • 7. 发明公开
    • 구조용 크롬강 및 그 제조방법
    • CR钢结构用途及其制造方法
    • KR1020050057106A
    • 2005-06-16
    • KR1020057003628
    • 2003-08-28
    • 제이에프이 스틸 가부시키가이샤
    • 우지로다쿠미오타히로키후루키미오사무시오카와다카시
    • C22C38/00C22C38/18C22C38/14
    • C22C38/004C21D6/002C21D8/0278C21D2261/00C22C38/02C22C38/04C22C38/18
    • A Cr steel for structural use, characterized in that it has a chemical composition: C: 0.002 to 0.02 %, N: 0.002 to 0.02 %, Si: 0.05 to 1.0 %, Mn: 0.05 to 1.0 %, P: 0.04 % or less, S: 0.02 % or less, Al: 0.001 to 0.1 %, Cr: 6.0 to 10.0 %, preferably Cu: 0.1 to 1.0 %, preferably one or more selected from Ni: 0.1 to 1.0 % and Mo: 0.1 to 1.0 %, preferably one or more selected from Nb: 0. 005 to 0.10 % and V: 0.005 to 0.20 %, and the balance: Fe and inevitable impurities, and in that the surface of a steel plate has a Cr concentration of (that at an inner portion of the plate - 1 %) or more; and a method for producing the Cr steel. The Cr steel for structural use is excellent in toughness at a low temperature and impact resistance, can be produced at a cost lower than that for a stainless steel, and also exhibits satisfactory corrosion resistance.
    • 一种Cr结构用钢,其特征在于,其组成为:C:0.002〜0.02%,N:0.002〜0.02%,Si:0.05〜1.0%,Mn:0.05〜1.0%,P:0.04%以下 ,S:0.02%以下,Al:0.001〜0.1%,Cr:6.0〜10.0%,优选Cu:0.1〜1.0%,优选选自Ni:0.1〜1.0%,Mo:0.1〜1.0% 优选选自Nb:0.005〜0.10%,V:0.005〜0.20%中的一种以上,余量为Fe和不可避免的杂质,并且钢板的表面的Cr浓度为 板的部分 - 1%)或更多; 以及Cr钢的制造方法。 用于结构用的Cr钢在低温下的韧性和耐冲击性都优异,可以低于不锈钢的成本制造,并且还表现出令人满意的耐腐蚀性。