公开(公告)号：US20080112840A1

公开(公告)日：2008-05-15

申请号：US11722341

申请日：2005-12-22

Applicant: Kwang-tae Kim ,  Yong-Heon Lee ,  Won-qeun Son

Inventor： Kwang-tae Kim ,  Yong-Heon Lee ,  Won-qeun Son

IPC: C22C38/44 ,  C22C38/58

CPC classification number: C22C38/44 ,  C22C38/001 ,  C22C38/58

Abstract: Disclosed is duplex stainless steel that containes relatively low content of Ni, and limits constituents of Cr—Mo—Mn—N to make volume fraction of α and γ have about 50:50, thereby minimizing incidence of a edge crack to enhance a production yield and decrease a processing load, in which the alloy constituents includes Cr of 19.5˜22.5%. Mo of 0.5-2.5%, Ni if 1.0-3.0%, Mn of 1.5-4.5%, N of 0.15-0.25%, Fe and unavoidable elements, and a constitution range of the alloy constituents are adjusted to make a CPt higher than 20° C. depending on the constitution range of the alloy constituents. Thus, the contents of Cr, Mo and Ni is decreased and the content of Mn is increased a little, so that a production cost thereof is reduced; the corrosion resistance is secured to be better than the STS 304 steel and the 316L steel; the incidence of the edge cract is decreased while being hot-rolled, thereby decreasing a load on the following process; and the surface defective is decreased, thereby improving a production yield.

Abstract translation: 公开了含有相对低含量的Ni的双相不锈钢，并且限制Cr-Mo-Mn-N的组分使得α和γ的体积分数具有约50:50，从而使边缘裂纹的发生率最小化以提高生产率 并减少加工负荷，其中合金成分含有19.5〜22.5％的Cr。 Mo为0.5-2.5％，Ni为1.0-3.0％，Mn为1.5-4.5％，N为0.15-0.25％，Fe和不可避免的元素，以及合金成分的组成范围，使得CPt高于20 取决于合金成分的构成范围。 因此，Cr，Mo，Ni的含量降低，Mn含量增加一点，生产成本降低; 确保耐腐蚀性优于STS 304钢和316L钢; 在热轧时，边缘的发生率降低，从而在以下过程中减少负载; 表面缺陷减少，提高了生产率。

公开(公告)号：US20110020165A1

公开(公告)日：2011-01-27

申请号：US12808994

申请日：2008-12-17

Applicant: Young-Hwan Kim ,  Hak Kim ,  Ki-Won Nam ,  Yong-Heon Lee

Inventor： Young-Hwan Kim ,  Hak Kim ,  Ki-Won Nam ,  Yong-Heon Lee

IPC: C22C38/42

CPC classification number: C22C38/04 ,  C22C38/40

Abstract: The object of the present invention is to provide stainless steel for high vacuum and high purity gas tube applications not having intrusion of impure particles into a processing gas and being cost-efficient. In order to accomplish the object, the present invention provides an austenitic stainless steel for a high vacuum and high purity gas tube application, the stainless steel including, in percent by weight, 0.1% or less of C, 1% or less of Si, 0.5 to 2% of Mn, 0.05% or less of P, 0.01% or less of S, 15 to 30% of Cr, 7 to 20% of Ni, 4% or less of Mo, 3% or less of Cu, 0.05% or less of N, 0.01% or less of B, 0.01% or less of O, a remaining part of Fe, and unavoidable impurities, wherein Ti content is limited to 0.005% or less, Al content is limited to 0.005 to 0.05%, and Ca content is limited to 0.0005 to 0.003%.

Abstract translation: 本发明的目的是提供一种用于高真空和高纯度气体管的不锈钢应用，其不会将不纯的颗粒侵入到处理气体中并且具有成本效益。 为了实现上述目的，本发明提供一种用于高真空和高纯度气体管道应用的奥氏体不锈钢，该不锈钢以重量％计含有0.1％以下的C，1％以下的Si， 0.5〜2％的Mn，0.05％以下的P，0.01％以下的S，15〜30％的Cr，7〜20％的Ni，4％以下的Mo，3％以下的Cu，0.05 N％以下，B：0.01％以下，O：0.01％以下，Fe的剩余部分和不可避免的杂质，Ti含量限制在0.005％以下，Al含量限制在0.005〜0.05％ ，Ca含量限于0.0005〜0.003％。

公开(公告)号：US5733387A

公开(公告)日：1998-03-31

申请号：US776806

申请日：1997-02-04

Applicant: Yong Deuk Lee ,  Kwang Tae Kim ,  Bong Un Kim ,  Yong Heon Lee

Inventor： Yong Deuk Lee ,  Kwang Tae Kim ,  Bong Un Kim ,  Yong Heon Lee

IPC: C21D8/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/44 ,  C22C38/58

CPC classification number: C21D8/0226 ,  C21D8/005 ,  C22C38/001 ,  C22C38/44 ,  C21D2211/001 ,  C21D2211/005 ,  C21D8/021 ,  C21D8/0263

Abstract: A duplex stainless steel consisting of a ferrite phase and an austenite phase is disclosed which is superior in the hot ductility, the high temperature oxidation resistance, the corrosion resistance and the impact toughness. The duplex stainless steel is applied to marine facility and the like. The duplex stainless steel which consists of a ferrite phase and an austenite phase is composed of in weight %: less than 0.03% of C, less than 1.0% of Si, less than 2.0% of Mn, less than 0.04% of P, less than 0.004% of S, less than 2.0% of Cu, 5.0-8.0% of Ni, 22-27% of Cr, 1.0-2.0% of Mo, 2.0-5.0% of W, and 0.13-0.30% of N. Or there are further added one or two elements selected from a group consisting of: less than 0.03% of Ca, less than 0.1% of Ce, less than 0.005% of B and 0.5% of Ti. Further, the ratio (Cr.sub.eq /Ni.sub.eq) of the Cr equivalent (Cr.sub.eq) to the Ni equivalent (Ni.sub.eq) is 2.2-3.0. Further, the weight ratio (W/Mo) of the W to Mo is 2.6-3.4. That is, the duplex stainless steel of the present invention satisfies the above condition, and the Ni.sub.eq and Cr.sub.eq are defined as follows: Ni.sub.eq =%Ni+30.times.%C+0.5.times.%Mn+0.33.times.%Cu+30.times.(%N-0.045), Cr.sub.eq =%Cr+Mo+1.5.times.%Si+0.73.times.%W.

Abstract translation: PCT No.PCT / KR96 / 00084 Sec。 371日期1997年2月4日 102（e）1997年2月4日PCT PCT 1996年6月5日PCT公布。 第WO96 / 39543号公报 日期：1996年12月12日公开了一种由铁素体相和奥氏体相组成的双相不锈钢，其在热延展性，耐高温氧化性，耐腐蚀性和冲击韧性方面优异。 双相不锈钢应用于海洋设施等。 由铁素体相和奥氏体相组成的双相不锈钢由重量％组成：小于0.03的C，小于1.0的Si，小于2.0的Mn，小于0.04的P，少 超过0.004％的S，小于2.0％的Cu，5.0-8.0％的Ni，22-27％的Cr，1.0-2.0％的Mo，2.0-5.0％的W和0.13-0.30％的N.或者 进一步添加一种或两种选自以下的元素：小于0.03％的Ca，小于0.1％的Ce，小于0.005％的B和0.5％的Ti。 此外，Cr当量（Creq）与Ni当量（Nieq）的比（Creq / Nieq）为2.2-3.0。 此外，W与Mo的重量比（W / Mo）为2.6〜3.4。 也就是说，本发明的双相不锈钢满足上述条件，Nieq和Creq定义如下：Nieq =％Ni + 30x％C + 0.5x％Mn + 0.33x％Cu + 30x（％ 0.045），Creq =％Cr + Mo + 1.5×Si + 0.73×W。