公开(公告)号：US20140356220A1

公开(公告)日：2014-12-04

申请号：US14368897

申请日：2012-12-27

申请人： POSCO

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

IPC分类号： C22C38/60 ,  C22C38/16 ,  B21B1/02 ,  C22C38/36 ,  C22C38/20 ,  C22C38/04 ,  C22C38/38

CPC分类号： C22C38/60 ,  B21B1/026 ,  C21D6/005 ,  C21D8/0263 ,  C21D9/46 ,  C22C38/00 ,  C22C38/002 ,  C22C38/04 ,  C22C38/16 ,  C22C38/20 ,  C22C38/36 ,  C22C38/38

摘要： There are provided a wear resistant austenitic steel having superior machinability and toughness in weld heat affected zones and a method for producing the austenitic steel. The austenitic steel includes, by weight %, manganese (Mn): 15% to 25%, carbon (C): 0.8% to 1.8%, copper (Cu) satisfying 0.7C-0.56(%)≦Cu≦5%, and the balance of iron (Fe) and inevitable impurities, wherein the weld heat affected zones have a Charpy impact value of 100 J or greater at −40° C. The toughness of the austenitic steel is not decreased in weld heat affected zones because the formation of carbides during welding is suppressed, and the machinability of the austenitic steel is improved so that a cutting process may be easily performed on the austenitic steel. The corrosion resistance of the austenitic steel is improved so that the austenitic steel may be used for an extended period of time in corrosive environments.

摘要翻译： 提供了在焊接热影响区域具有优异的机械加工性和韧性的耐磨奥氏体钢和奥氏体钢的制造方法。 奥氏体钢以重量％计含有：锰（Mn）：15〜25％，碳（C）：0.8〜1.8％，满足0.7C〜0.56（％）的铜（Cu）和nlE; Cu＆ 和铁（Fe）和不可避免的杂质的平衡，其中焊接热影响区在-40℃时具有100J以上的夏比冲击值。在焊接热影响区中奥氏体钢的韧性不降低，因为 可以抑制焊接时的碳化物的形成，提高奥氏体钢的切削性，能够容易地对奥氏体钢进行切削加工。 奥氏体钢的耐腐蚀性提高，奥氏体钢可以在腐蚀性环境中长时间使用。

公开(公告)号：US09650703B2

公开(公告)日：2017-05-16

申请号：US14368604

申请日：2012-12-27

申请人： POSCO

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

IPC分类号： C22C38/60 ,  C22C38/38 ,  C22C38/02 ,  C22C38/36 ,  C22C38/04 ,  C21D6/00 ,  C22C38/00 ,  C22C38/16 ,  C22C38/20 ,  B21B1/02 ,  C21D9/46

CPC分类号： C22C38/38 ,  B21B1/026 ,  C21D6/005 ,  C21D9/46 ,  C21D2211/001 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/16 ,  C22C38/20 ,  C22C38/36 ,  C22C38/60

摘要： There are provided a wear resistant austenitic steel having superior machinability and toughness in weld heat affected zones and a method for producing the austenitic steel. The austenitic steel includes, by weight %, manganese (Mn): 15% to 25%, carbon (C): 0.8% to 1.8%, copper (Cu) satisfying 0.7C-0.56(%)≦Cu≦5%, and the balance of iron (Fe) and inevitable impurities, wherein the weld heat affected zones have a Charpy impact value of 100 J or greater at −40° C. The toughness of the austenitic steel is not decreased in weld heat affected zones because the formation of carbides during welding is suppressed, and the machinability of the austenitic steel is improved so that a cutting process may be easily performed on the austenitic steel. The corrosion resistance of the austenitic steel is improved so that the austenitic steel may be used for an extended period of time in corrosive environments.

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.

公开(公告)号：US09945014B2

公开(公告)日：2018-04-17

申请号：US14654639

申请日：2012-12-28

申请人： POSCO

发明人： Soon-Gi Lee ,  In-Shik Suh ,  In-Gyu Park ,  Hong-Ju Lee

IPC分类号： C21D8/00 ,  C22C38/04 ,  C22C38/12 ,  C21D6/00 ,  C22C38/02 ,  C22C38/00 ,  C22C38/14

CPC分类号： C22C38/12 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/14

摘要： A high-manganese wear-resistant steel having excellent weldability comprises 5 to 15 wt % of Mn, 16≤33.5C+Mn≤30 of C, 0.05 to 1.0 wt % of Si, and a balance of Fe and other inevitable impurities. The microstructure thereof includes martensite as a major component, and 5% to 40% of residual austenite by area fraction.

公开(公告)号：US10961610B2

公开(公告)日：2021-03-30

申请号：US16061196

申请日：2016-12-23

申请人： POSCO

发明人： Un-Hae Lee ,  Sung-Kyu Kim ,  Soon-Gi Lee ,  Yong-Jin Kim ,  Hong-Yeol Oh

IPC分类号： C22C38/38 ,  C22C38/00 ,  C22C38/06 ,  C21D9/46 ,  C22C38/18 ,  C21D6/00 ,  C21D8/02 ,  C22C38/04 ,  C22C38/02

摘要： Provided according to one embodiment of the present invention are a non-magnetic steel material and a method for manufacturing the same. The steel material comprises 15-27 wt % of manganese, 0.1-1.1 wt % of carbon, 0.05-0.50 wt % of silicon, 0.03 wt % or less (0% exclusive) of phosphorus, 0.01 wt % or less (0% exclusive) of sulfur, 0.050 wt % or less (0% exclusive) of aluminum, 5 wt % or less (0% inclusive) of chromium, 0.01 wt % or less (0% inclusive) of boron, 0.1 wt % or less (0% exclusive) of nitrogen, and a balance amount of Fe and inevitable impurities, has an index of sensitivity of 3.4 or less, the index of sensitivity being represented by the following relational expression (1): [Relational expression 1]—0.451+34.131*P+111.152*Al−799.483*B+0.526*Cr≤3.4 (wherein [P], [Al], [B] and [Cr] each mean a wt % of corresponding elements), and contains a microstructure with austenite at an area fraction of 95% or greater therein.

公开(公告)号：US11873546B2

公开(公告)日：2024-01-16

申请号：US17195850

申请日：2021-03-09

申请人： POSCO CO., LTD

发明人： Un-Hae Lee ,  Sung-Kyu Kim ,  Soon-Gi Lee ,  Yong-Jin Kim ,  Hong-Yeol Oh

IPC分类号： C22C38/38 ,  C22C38/00 ,  C21D9/46 ,  C22C38/18 ,  C21D6/00 ,  C21D8/02 ,  C22C38/04 ,  C22C38/02 ,  C22C38/06

CPC分类号： C22C38/38 ,  C21D6/005 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C21D2211/001

摘要： Provided according to one embodiment of the present invention are a non-magnetic steel material and a method for manufacturing the same. The steel material comprises 15-27 wt % of manganese, 0.1-1.1 wt % of carbon, 0.05-0.50 wt % of silicon, 0.03 wt % or less (0% exclusive) of phosphorus, 0.01 wt % or less (0% exclusive) of sulfur, 0.050 wt % or less (0% exclusive) of aluminum, 5 wt % or less (0% inclusive) of chromium, 0.01 wt % or less (0% inclusive) of boron, 0.1 wt % or less (0% exclusive) of nitrogen, and a balance amount of Fe and inevitable impurities, has an index of sensitivity of 3.4 or less, the index of sensitivity being represented by the following relational expression (1): [Relational expression 1]−0.451+34.131*P+111.152*Al−799.483*B+0.526*Cr≤3.4 (wherein [P], [Al], [B] and [Cr] each mean a wt % of corresponding elements), and contains a microstructure with austenite at an area fraction of 95% or greater therein.

公开(公告)号：US10041156B2

公开(公告)日：2018-08-07

申请号：US14758203

申请日：2013-12-24

申请人： POSCO

发明人： Hak-Cheol Lee ,  In-Shik Suh ,  Soon-Gi Lee ,  In-Gyu Park ,  Yong-Jin Kim ,  Hong-Ju Lee

IPC分类号： C21D6/00 ,  C21D8/00 ,  C22C38/04 ,  C22C38/22 ,  C22C38/32 ,  C22C38/00 ,  C22C38/20 ,  C21D8/02 ,  C21D8/04 ,  C22C38/38 ,  C22C38/28

CPC分类号： C22C38/001 ,  C21D6/002 ,  C21D6/005 ,  C21D8/005 ,  C21D8/0226 ,  C21D8/0426 ,  C22C38/00 ,  C22C38/04 ,  C22C38/20 ,  C22C38/22 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

摘要： The present invention relates to a high strength austenitic-based steel with remarkable toughness of a welding heat-affected zone and a preparation method therefor. One embodiment of the present invention provides: a high strength austenitic-based steel with remarkable toughness of a welding heat-affected zone, comprising 0.8-1.5 wt % of C, 15-22 wt % of Mn, 5 wt % or less of Cr (except 0), and the balance of Fe and other inevitable impurities, and further comprising at least one of the following (a) and (b), wherein the microstructure of a welding heat-affected zone comprises 90% or more of austenite by volume fraction; and a preparation method therefor. (a) Mo: 0.1-1% and B: 0.001-0.02% (b) Ti: 0.01-0.3% and N: 0.003-0.1%.

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：US20140373588A1

公开(公告)日：2014-12-25

申请号：US14368604

申请日：2012-12-27

申请人： POSCO

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

IPC分类号： C22C38/38 ,  B21B1/02 ,  C22C38/04 ,  C22C38/00 ,  C22C38/20 ,  C22C38/16

CPC分类号： C22C38/38 ,  B21B1/026 ,  C21D6/005 ,  C21D9/46 ,  C21D2211/001 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/16 ,  C22C38/20 ,  C22C38/36 ,  C22C38/60

摘要： There are provided a wear resistant austenitic steel having superior machinability and toughness in weld heat affected zones and a method for producing the austenitic steel. The austenitic steel includes, by weight %, manganese (Mn): 15% to 25%, carbon (C): 0.8% to 1.8%, copper (Cu) satisfying 0.7C-0.56(%)≦Cu≦5%, and the balance of iron (Fe) and inevitable impurities, wherein the weld heat affected zones have a Charpy impact value of 100 J or greater at −40° C. The toughness of the austenitic steel is not decreased in weld heat affected zones because the formation of carbides during welding is suppressed, and the machinability of the austenitic steel is improved so that a cutting process may be easily performed on the austenitic steel. The corrosion resistance of the austenitic steel is improved so that the austenitic steel may be used for an extended period of time in corrosive environments.

摘要翻译： 提供了在焊接热影响区域具有优异的机械加工性和韧性的耐磨奥氏体钢和奥氏体钢的制造方法。 奥氏体钢以重量％计含有：锰（Mn）：15〜25％，碳（C）：0.8〜1.8％，满足0.7C〜0.56（％）的铜（Cu）和nlE; Cu＆ 和铁（Fe）和不可避免的杂质的平衡，其中焊接热影响区在-40℃时具有100J以上的夏比冲击值。在焊接热影响区中奥氏体钢的韧性不降低，因为 可以抑制焊接时的碳化物的形成，提高奥氏体钢的切削性，能够容易地对奥氏体钢进行切削加工。 奥氏体钢的耐腐蚀性提高，奥氏体钢可以在腐蚀性环境中长时间使用。