-
1.发明申请公开(公告)号：US20190323101A1
公开(公告)日：2019-10-24
申请号：US16453194
申请日：2019-06-26
发明人： Hidekazu MINAMI , Takeshi YOKOTA , Kazuhiro SETO
IPC分类号： C21D9/46 , C21D6/00 , C23C2/02 , C21D8/02 , C22C38/22 , C22C38/26 , C22C38/28 , C23C2/40 , C23C2/06 , C22C38/60 , C22C38/38 , C22C38/34 , C22C38/18 , C22C38/16 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , B32B15/01 , C22C38/14 , C22C18/00 , C23C2/28
摘要： A high strength steel sheet having a high Young's modulus, the steel sheet having a chemical composition including, by mass %, C: 0.060% or more and 0.150% or less, Si: 0.50% or more and 2.20% or less, Mn: 1.00% or more and 3.00% or less, and one or both of Ti: 0.001% or more and 0.200% or less and Nb: 0.001% or more and 0.200% or less, in which the contents of C, N, S, Ti, and Nb satisfy the equation 500≤C*≤1300. The steel sheet has a microstructure including ferrite in an amount of 20% or more and martensite in an amount of 5% or more, in terms of area ratio, such that the average grain size of the ferrite is 20.0 μm or less and the inverse intensity ratio of γ-fiber for α-fiber is 1.00 or more in the ferrite and the martensite.
-
公开(公告)号：US20180195143A1
公开(公告)日：2018-07-12
申请号：US15742116
申请日：2016-08-26
发明人： Fusae SHIIMORI , Yoshiyasu KAWASAKI , Shinjiro KANEKO , Takeshi YOKOTA , Kazuhiro SETO , Takaaki TANAKA , Yuki TOJI
CPC分类号： C21D9/46 , B32B15/013 , C21D1/32 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C22C18/04 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/38 , C23C2/06
摘要： This disclosure provides a high-strength thin steel sheet excellent in both tensile strength and elongation with small elongation anisotropy. The high-strength thin steel sheet has a specific chemical composition and a microstructure where a total area ratio of ferrite, tempered bainitic ferrite and bainitic ferrite is 40% or more and 70% or less, an area ratio of martensite is 5% or more and 30% or less, an area ratio of retained austenite is 10% or more and 35% or less, an average equivalent circular diameter of martensite and retained austenite (secondary phase) grains is 2.0 μm or less, an area ratio of secondary phase grains having an equivalent circular diameter of 2.0 μm or more is 10% or less, and an average minor axis length of secondary phase grains is 0.40 μm or less.
-
公开(公告)号：US20180023160A1
公开(公告)日：2018-01-25
申请号：US15547100
申请日：2016-01-27
IPC分类号： C21D9/46 , C22C38/22 , C22C38/28 , C22C38/24 , C22C38/38 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/60 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C23C2/06 , C23C2/40 , C23F17/00 , C21D8/02
CPC分类号： C21D9/46 , C21D1/25 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/00 , C21D8/005 , C21D8/02 , C21D8/0205 , C21D8/0221 , C21D8/0226 , C21D8/0236 , C21D8/0247 , C21D8/0278 , C21D8/04 , C21D8/0405 , C21D8/0421 , C21D8/0426 , C21D8/0447 , C21D8/0473 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/22 , C22C38/24 , C22C38/28 , C22C38/38 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/28 , C23C2/40 , C23F17/00
摘要： A steel sheet has a microstructure that contains ferrite in an area ratio of 20% or more, martensite in an area ratio of 5% or more, and tempered martensite in an area ratio of 5% or more. The ferrite has a mean grain size of 20.0 μm or less. An inverse intensity ratio of γ-fiber to α-fiber in the ferrite is 1.00 or more and an inverse intensity ratio of γ-fiber to α-fiber in the martensite and the tempered martensite is 1.00 or more.
-
4.发明申请公开(公告)号：US20170211163A1
公开(公告)日：2017-07-27
申请号：US15326811
申请日：2015-08-05
发明人： Yoshiyasu KAWASAKI , Hiroshi MATSUDA , Kazunori TAHARA , Takeshi YOKOTA , Kaneharu OKUDA , Kazuhiro SETO
IPC分类号： C21D9/46 , C21D6/00 , C22C38/60 , C22C38/38 , C22C38/16 , C23F17/00 , C22C38/12 , C22C38/06 , C22C38/00 , C22C38/04 , C22C38/02 , C23C2/06 , C21D8/02 , C22C38/14
CPC分类号： C21D9/46 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C21D2211/001 , C21D2211/005 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/38 , C22C38/60 , C23C2/06 , C23F17/00
摘要： Disclosed is a high-strength steel sheet having a tensile strength (TS) of 780 MPa or more and excellent in ductility, fatigue properties, balance between high strength and ductility, surface characteristics, and sheet passage ability that can be obtained by providing a predetermined chemical composition and a steel microstructure that contains, by area, 20-50% of ferrite, 5-25% of bainitic ferrite, and 5-20% of martensite, and that contains, by volume, 10% or more of retained austenite, in which the retained austenite has a mean grain size of 2 μm or less, a mean Mn content in the retained austenite in mass % is at least 1.2 times the Mn content in the steel sheet in mass %, and the retained austenite has a mean free path of 1.2 μm or less.
-
5.发明申请HIGH STRENGTH STEEL SHEET HAVING HIGH YOUNG'S MODULUS AND METHOD FOR MANUFACTURING THE SAME 审中-公开具有高年龄模块的高强度钢板及其制造方法公开(公告)号：US20160186299A1
公开(公告)日：2016-06-30
申请号：US14909562
申请日：2014-07-16
发明人： Hidekazu MINAMI , Takeshi YOKOTA , Kazuhiro SETO
IPC分类号： C22C38/60 , C23C2/06 , C22C38/38 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/16 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D9/46 , C21D8/02 , C21D6/00 , B32B15/01 , C23C2/02
CPC分类号： C22C38/60 , B21B1/22 , B21B3/00 , B32B15/01 , B32B15/013 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0247 , C21D8/0263 , C21D9/46 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/38 , C22C38/58 , C23C2/02 , C23C2/06 , C23C2/28
摘要： A high strength steel sheet having a high Young's modulus, the steel sheet having a chemical composition including, by mass %, C: 0.060% or more and 0.150% or less, Si: 0.50% or more and 2.20% or less, Mn: 1.00% or more and 3.00% or less, Nb: 0.001% or more and 0.200% or less, and V: 0.001% or more and 0.200% or less, in which the contents of C, Nb, and V satisfy the equation 500≦C*≦1300. The steel sheet has a microstructure including ferrite in an amount of 20% or more and martensite in an amount of 5% or more, in terms of area ratio, such that the average grain size of the ferrite is 20.0 μm or less and the inverse intensity ratio of γ-fiber for α-fiber is 1.00 or more in each of the ferrite and the martensite.
摘要翻译： 具有高杨氏模量的高强度钢板，所述钢板的化学成分以质量％计含有C：0.060％以上且0.150％以下，Si：0.50％以上且2.20％以下，Mn： 1.00％以上且3.00％以下，Nb：0.001％以上且0.200％以下，V：0.001％以上且0.200％以下，C，Nb，V含量满足式（500＆ ; C *＆nlE; 1300。 该钢板的面积比为20％以上的铁素体和5％以上的马氏体的组织，铁素体的平均粒径为20.0μm以下， 铁素体和马氏体中的α-纤维的γ纤维的强度比为1.00以上。
-
公开(公告)号：US20210381075A1
公开(公告)日：2021-12-09
申请号：US17283840
申请日：2019-08-20
发明人： Hidekazu MINAMI , Yuji TANAKA , Junya TOBATA , Takeshi YOKOTA
IPC分类号： C21D9/46 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C23G1/00 , C23C2/06 , C23C2/12 , C25D3/22 , C25D3/44
摘要： A high-strength steel sheet having a tensile strength of 1,180 MPa or more, and specified chemical composition. The steel sheet includes a steel structure in which an area fraction of martensite having a carbon concentration of more than 0.7×[% C] and less than 1.5×[% C] is 55% or more, an area fraction of tempered martensite having a carbon concentration of 0.7×[% C] or less is 5% or more and 40% or less, a ratio of a carbon concentration in retained austenite to a volume fraction of retained austenite is 0.05 or more and 0.40 or less, and the martensite and the tempered martensite each have an average grain size of 5.3 μm or less, where [% C] represents the content, by mass %, of compositional element C in steel.
-
公开(公告)号：US20180179610A9
公开(公告)日：2018-06-28
申请号：US15547876
申请日：2016-01-27
IPC分类号： C21D9/46 , C23C2/28 , C23C2/06 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/02 , B32B15/01 , C22C38/00 , C21D8/02 , C21D6/00
CPC分类号： C21D9/46 , B32B15/013 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/28
摘要： A steel sheet has a microstructure that contains ferrite in an area ratio of 20% or more, martensite in an area ratio of 5% or more, and tempered martensite in an area ratio of 5% or more. The ferrite has a mean grain size of 20.0 μm or less. An inverse intensity ratio of γ-fiber to α-fiber in the ferrite is 1.00 or more and an inverse intensity ratio of γ-fiber to α-fiber in the martensite and the tempered martensite is 1.00 or more.
-
公开(公告)号：US20180016656A1
公开(公告)日：2018-01-18
申请号：US15547876
申请日：2016-01-27
IPC分类号： C21D9/46 , C23C2/06 , C22C38/12 , C22C38/06 , C21D6/00 , C22C38/02 , B32B15/01 , C22C38/00 , C21D8/02 , C23C2/28 , C22C38/04
CPC分类号： C21D9/46 , B32B15/013 , C21D1/25 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/28
摘要： A steel sheet has a microstructure that contains ferrite in an area ratio of 20% or more, martensite in an area ratio of 5% or more, and tempered martensite in an area ratio of 5% or more. The ferrite has a mean grain size of 20.0 μm or less. An inverse intensity ratio of γ-fiber to α-fiber in the ferrite is 1.00 or more and an inverse intensity ratio of γ-fiber to α-fiber in the martensite and the tempered martensite is 1.00 or more.
-
公开(公告)号：US20170306437A1
公开(公告)日：2017-10-26
申请号：US15521515
申请日：2015-10-05
发明人： Koichi NAKAGAWA , Takeshi YOKOTA , Kazuhiro SETO
IPC分类号： C21D9/46 , B21D22/02 , C23C2/12 , C23C2/06 , C22C38/38 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/02 , C22C38/00 , C22C18/00 , C23C2/28 , B32B15/01 , C21D1/673 , C21D8/02 , C21D6/00 , C23C2/40
CPC分类号： C21D9/46 , B21D22/022 , B32B15/012 , B32B15/013 , B32B2255/06 , B32B2255/205 , C21D1/18 , C21D1/673 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0278 , C21D8/0436 , C21D9/48 , C21D2211/001 , C21D2211/008 , C22C18/00 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/38 , C22C38/60 , C23C2/06 , C23C2/12 , C23C2/28 , C23C2/40 , Y10T428/12757
摘要： A high-strength hot-pressed part having a specified chemical composition, a microstructure including, in terms of volume fraction, 80% or more of a martensite phase, in a range of 3.0% to 20.0% of a retained austenite phase, a tensile strength TS of 1500 MPa or more, and a uniform elongation uEl of 6.0% or more. A method for manufacturing the high-strength hot-pressed part, the method comprising performing a heating process and a hot press forming process on a raw material steel sheet in order to obtain a hot-pressed part having a specified shape.
-
10.发明申请公开(公告)号：US20170218472A1
公开(公告)日：2017-08-03
申请号：US15326116
申请日：2015-08-05
发明人： Yoshiyasu KAWASAKI , Hiroshi MATSUDA , Kazunori TAHARA , Takeshi YOKOTA , Kaneharu OKUDA , Kazuhiro SETO
IPC分类号： C21D9/46 , C23C2/28 , C23C2/40 , C22C38/60 , C22C38/38 , C22C38/16 , C22C38/14 , C22C38/12 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/02 , C21D1/60 , C23G1/00 , B32B15/01 , C23C2/06
CPC分类号： C21D9/46 , B32B15/013 , C21D1/60 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/38 , C22C38/60 , C23C2/06 , C23C2/28 , C23C2/40 , C23G1/00
摘要： Disclosed is a high-strength steel sheet having a tensile strength (TS) of 780 MPa or more and excellent in ductility, fatigue properties, stretch flangeability, surface characteristics, and sheet passage ability that can be obtained by providing a predetermined chemical composition and a steel microstructure that contains, by area, 20-50% of ferrite, 5-25% of bainitic ferrite, 1-10% of martensite, and 5-15% of tempered martensite, and that contains, by volume, 10% or more of retained austenite, in which the retained austenite has a mean grain size of 2 μm or less, a mean Mn content in the retained austenite in mass % is at least 1.2 times the Mn content in the steel sheet in mass %, the retained austenite has a mean free path of 1.2 μm or less, and the tempered martensite has a mean free path of 1.2 μm or less.
-
-
-
-
-
-
-
-
-
搜索结果
30 条记录 (耗时 0.029 秒)
