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    • 8. 发明公开
    • TWO-PHASE STAINLESS STEEL
    • 两相不锈钢
    • EP2476771A1
    • 2012-07-18
    • EP10815306.5
    • 2010-09-01
    • Sumitomo Metal Industries, Ltd.
    • AMAYA, HisashiTAKABE, HidekiOGAWA, Kazuhiro
    • C22C38/00C22C38/58
    • C22C38/44C22C1/02C22C38/001C22C38/02C22C38/42C22C38/58
    • [Problem to be Solved]
      To provide a duplex stainless steel excellent in the weldability during large heat input welding and excellent in the stress corrosion cracking resistance in a chloride environment containing corrosive associated gases.
      [Solution]
      A duplex stainless steel that has a chemical composition consisting, by mass%, of C: 0.03% or less, Si: 0.2 to 1%, Mn: 5.0% or less, P: 0.040% or less, S: 0.010% or less, sol. Al: 0.040% or less, Ni: 4 to 8%, Cr: 20 to 28%, Mo: 0.5 to 2.0%, Cu: more than 2.0% and 4.0% or less and N: 0.1 to 0.35%, and optionally contains one or more selected from among V, Ca, Mg, B and a rare earth metal(s), with the balance being Fe and impurities; wherein the duplex stainless steel satisfies the relations of the following formulas (1) and (2):


      wherein the symbols of elements in formulas (1) and (2) respectively represent the contents (unit: mass%) of the elements in the steel.
    • [要解决的问题]提供一种双相不锈钢,其在大的热输入焊接期间的焊接性优异,并且在含有腐蚀性伴生气体的氯化物环境中具有优异的抗应力腐蚀开裂性。 [解决方案]一种双相不锈钢,其特征在于,以质量%计含有C:0.03%以下,Si:0.2〜1%,Mn:5.0%以下,P:0.040%以下,S:0.010 %或更少,sol。 Al:0.040%以下,Ni:4〜8%,Cr:20〜28%,Mo:0.5〜2.0%,Cu:超过2.0%且4.0%以下,N:0.1〜0.35% 一种或多种选自V,Ca,Mg,B和一种或多种稀土金属,余量为Fe和杂质; 其中所述双相不锈钢满足下式(1)和(2)的关系:其中式(1)和(2)中的元素的符号分别表示钢中元素的含量(单位:质量%) 。
    • 9. 发明公开
    • BENT MEMBER, AND DEVICE AND METHOD FOR MANUFACTURING SAME
    • GEBOGENES ELEMENT SOWIE VORRICHTUNG UND VERFAHREN UND ZU DESSEN HERSTELLUNG
    • EP2471609A1
    • 2012-07-04
    • EP10811791.2
    • 2010-08-23
    • Sumitomo Metal Industries, Ltd.Sumitomo Pipe & Tube Co., Ltd.
    • TOMIZAWA, AtsushiKUBOTA, HiroakiKUWAYAMA, ShinjiroINOUE, Saburo
    • B21D7/16B21D7/08
    • B21D7/08B21D7/162B21D7/165Y10T428/1241
    • A bent member having a bent portion with an extremely small bend radius such as at most 1 - 5 times its wall thickness and an apparatus and method for its manufacture are provided. A bent member 21 is manufactured by supporting a rectangular tube 16 by a first support means 11 disposed at a first position A while performing relative feeding of the rectangular tube in its lengthwise direction, locally heating the rectangular tube 16 by a heating means 12 disposed at a second position B, cooling the rectangular tube by a cooling means 13 disposed at a third position C, and at the time of working, applying a shear force to the heated portion of the rectangular tube 16 with a shear force applying means 14 disposed in a downstream region D by moving the device 14 two-dimensionally or three-dimensionally simultaneously in the feed direction of the rectangular tube 16 and in a direction generally parallel to a transverse cross section in the lengthwise direction of the rectangular tube 16 which was heated by the heating means 12.
    • 具有弯曲部分的弯曲部件具有非常小的弯曲半径,例如其壁厚的至多1-5倍,并且提供了一种用于其制造的装置和方法。 通过在设置在第一位置A处的第一支撑装置11支撑矩形管16来制造弯曲构件21,同时在长度方向上执行矩形管的相对馈送,通过设置在矩形管16上的加热装置12局部加热矩形管16 第二位置B,通过设置在第三位置C的冷却装置13冷却矩形管,并且在加工时,使用设置在矩形管16中的剪切力施加装置14向矩形管16的加热部分施加剪切力 通过在矩形管16的进给方向上沿着与矩形管16的长度方向大致平行的横截面的方向二维或三维同时地移动装置14来形成下游区域D,矩形管16的长度方向被加热 加热装置12。