公开(公告)号：US20150020928A1

公开(公告)日：2015-01-22

申请号：US14369090

申请日：2012-12-27

申请人： POSCO

发明人： Soon-Gi Lee ,  Jong-Kyo Choi ,  Young-Hwan Park ,  Hee-Goon Noh ,  Hyun-Kwan Cho ,  In-Shik Suh ,  In-Gyu Park ,  Hong-Ju Lee

IPC分类号： C21D9/50 ,  B23K31/02 ,  B23K35/30

CPC分类号： C21D9/505 ,  B23K31/02 ,  B23K35/3073 ,  B23K2101/00 ,  C21D6/005 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/04 ,  C22C38/20 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/60

摘要： Provided are an austenitic steel having excellent machinability and ultra-low temperature toughness in a weld heat-affected zone including 15 wt % to 35 wt % of manganese (Mn), carbon (C) satisfying 23.6C+Mn≧28 and 33.5C−Mn≦23, 5 wt % or less (excluding 0 wt %) of copper (Cu), chromium (Cr) satisfying 28.5C+4.4Cr≦57 (excluding 0 wt %), and iron (Fe) as well as other unavoidable impurities as a remainder, wherein a Charpy impact value of a weld heat-affected zone at −196° C. is 41 J or more, and a method of manufacturing the steel.According to the present invention, a low-cost ultra-low temperature steel may be obtained, a stable austenite phase may be formed at low temperature, carbide formation may be effectively suppressed, and a structural steel having excellent machinability and ultra-low temperature toughness in a weld heat-affected zone may be provided.

摘要翻译： 提供一种在焊接热影响区具有优异的机械加工性和超低温韧性的奥氏体钢，其包含15重量％〜35重量％的锰（Mn），满足23.6℃+Mn≥28的碳（C）和33.5℃〜 （Cu），满足28.5℃+ 4.4Cr＆nlE的铬（Cr），57（不包括0重量％）和铁（Fe）以及其他不可避免的铜（Cu）的23.5重量％以下（不含0重量％） 作为余量的杂质，其中-196℃的焊接热影响区的夏比冲击值为41J以上，以及钢的制造方法。 根据本发明，可以获得低成本的超低温钢，可以在低温下形成稳定的奥氏体相，可以有效地抑制碳化物的形成，并且具有优异的机械加工性和超低温韧性的结构钢 可以提供焊接热影响区域。

公开(公告)号：US09708698B2

公开(公告)日：2017-07-18

申请号：US14369532

申请日：2012-12-27

申请人： POSCO

发明人： Jong-Kyo Choi ,  Woo-Kil Jang ,  Young-Hwan Park ,  Hong-Ju Lee

IPC分类号： C22C38/54 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/02 ,  C21D6/00 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C21D8/02

CPC分类号： C22C38/54 ,  C21D6/005 ,  C21D8/0226 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50

摘要： Provided is a wear resistant steel including 2.6 wt % to 4.5 wt % of manganese (Mn), carbon (C) satisfying (6-Mn)/50≦C≦(10-Mn)/50, 0.05 wt % to 1.0 wt % of silicon (Si), and iron (Fe) as well as other unavoidable impurities as a remainder, wherein a Brinell hardness of a surface portion is in a range of 360 to 440. The wear resistant steel further includes at least one component selected from the group consisting of 0.1 wt % or less (excluding 0 wt %) of niobium (Nb), 0.1 wt % or less (excluding 0 wt %) of vanadium (V), 0.1 wt % or less (excluding 0 wt %) of titanium (Ti), and 0.02 wt % or less (excluding 0 wt %) of boron (B) to complement the performance thereof. The wear resistant steel is characterized in that a microstructure includes martensite in an amount of 90% or more, and an average packet diameter of the martensite is 20 μm or less.

公开(公告)号：US20140334967A1

公开(公告)日：2014-11-13

申请号：US14369532

申请日：2012-12-27

申请人： POSCO

发明人： Jong-Kyo Choi ,  Woo-Kil Jang ,  Young-Hwan Park ,  Hong-Ju Lee

IPC分类号： C22C38/54 ,  C22C38/48 ,  C22C38/02 ,  C22C38/14 ,  C22C38/12 ,  C22C38/04 ,  C22C38/50 ,  C22C38/44

CPC分类号： C22C38/54 ,  C21D6/005 ,  C21D8/0226 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50

摘要： Provided is a wear resistant steel including 2.6 wt % to 4.5 wt % of manganese (Mn), carbon (C) satisfying (6-Mn)/50≦C≦(10-Mn)/50, 0.05 wt % to 1.0 wt % of silicon (Si), and iron (Fe) as well as other unavoidable impurities as a remainder, wherein a Brinell hardness of a surface portion is in a range of 360 to 440. The wear resistant steel further includes at least one component selected from the group consisting of 0.1 wt % or less (excluding 0 wt %) of niobium (Nb), 0.1 wt % or less (excluding 0 wt %) of vanadium (V), 0.1 wt % or less (excluding 0 wt %) of titanium (Ti), and 0.02 wt % or less (excluding 0 wt %) of boron (B) to complement the performance thereof. The wear resistant steel is characterized in that a microstructure includes martensite in an amount of 90% or more, and an average packet diameter of the martensite is 20 μm or less.

摘要翻译： 本发明提供一种包含2.6重量％〜4.5重量％的锰（Mn），满足（6-Mn）/ 50＆amp; NlE的碳（C），（10-Mn）/ 50,0.05重量％〜1.0重量％ 的硅（Si）和铁（Fe）以及其它不可避免的杂质作为余量，其中表面部分的布氏硬度在360至440的范围内。耐磨钢还包括至少一种选自 0.1重量％以下（不含0重量％）的铌（Nb），0.1重量％以下（不含0重量％）的钒（V），0.1重量％以下（不含0重量％）的钒 钛（Ti）和0.02重量％以下（不含0重量％）的硼（B），以补充其性能。 耐磨钢的特征在于，微结构包含90％以上的马氏体，马氏体的平均包体直径为20μm以下。

公开(公告)号：US10655196B2

公开(公告)日：2020-05-19

申请号：US14369090

申请日：2012-12-27

申请人： POSCO

发明人： Soon-Gi Lee ,  Jong-Kyo Choi ,  Young-Hwan Park ,  Hee-Goon Noh ,  Hyun-Kwan Cho ,  In-Shik Suh ,  In-Gyu Park ,  Hong-Ju Lee

IPC分类号： C21D9/50 ,  C22C38/00 ,  C22C38/38 ,  C21D6/00 ,  C22C38/28 ,  C22C38/24 ,  C22C38/26 ,  C22C38/20 ,  C22C38/60 ,  C22C38/04 ,  B23K31/02 ,  B23K35/30 ,  B23K101/00 ,  C21D9/46

摘要： Provided are an austenitic steel having excellent machinability and ultra-low temperature toughness in a weld heat-affected zone including 15 wt % to 35 wt % of manganese (Mn), carbon (C) satisfying 23.6C+Mn≥28 and 33.5C−Mn≤23, 5 wt % or less (excluding 0 wt %) of copper (Cu), chromium (Cr) satisfying 28.5C+4.4Cr≤57 (excluding 0 wt %), and iron (Fe) as well as other unavoidable impurities as a remainder, wherein a Charpy impact value of a weld heat-affected zone at −196° C. is 41 J or more, and a method of manufacturing the steel.According to the present invention, a low-cost ultra-low temperature steel may be obtained, a stable austenite phase may be formed at low temperature, carbide formation may be effectively suppressed, and a structural steel having excellent machinability and ultra-low temperature toughness in a weld heat-affected zone may be provided.