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公开(公告)号：US20190249282A1
公开(公告)日：2019-08-15
申请号：US16335216
申请日：2017-01-31
发明人： Katsuya NAKANO , Kunio HAYASHI , Yuri TODA , Eisaku SAKURADA , Akihiro UENISHI
IPC分类号： C22C38/58 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/04 , C22C38/22 , C22C38/20 , C22C38/26 , C22C38/24 , C22C38/28 , C22C38/32 , C23C2/06 , C23C2/40
CPC分类号： C22C38/58 , C21D9/46 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C23C2/06 , C23C2/40
摘要： A steel sheet includes a predetermined chemical composition and a metal structure represented by, in area fraction, ferrite: 50% to 95%, granular bainite: 5% to 48%, tempered martensite: 2% to 30%, upper bainite, lower bainite, fresh martensite, retained austenite, and pearlite: 5% or less in total, and the product of the area fraction of the tempered martensite and a Vickers hardness of the tempered martensite: 800 to 10500.
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公开(公告)号：US20190233926A1
公开(公告)日：2019-08-01
申请号：US16312222
申请日：2017-08-04
发明人： Kohichi SANO , Makoto UNO , Ryoichi NISHIYAMA , Yuji YAMAGUCHI , Natsuko SUGIURA , Masahiro NAKATA
IPC分类号： C22C38/38 , C22C38/02 , C22C38/06 , C22C38/00 , C22C38/26 , C22C38/28 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/08 , C22C38/04 , C23C2/06 , C23C2/40
CPC分类号： C22C38/38 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D9/46 , C21D2201/05 , C21D2211/002 , C21D2211/005 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/26 , C22C38/28 , C22C38/58 , C23C2/06 , C23C2/40
摘要： A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 5 to 95%, and bainite: 5 to 95%. When a region that is surrounded by a grain boundary having a misorientation of 15° or more and has a circle-equivalent diameter of 0.3 μm or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. Hard crystal grains A in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1×1016 to 1×1019 pieces/cm3 and soft crystal grains B in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1×1015 pieces/cm3 or less are contained, and the volume % of the hard crystal grains A/(the volume % of the hard crystal grains A +the volume % of the soft crystal grains B) is 0.1 to 0.9.
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公开(公告)号：US20190211416A1
公开(公告)日：2019-07-11
申请号：US16325572
申请日：2017-08-22
发明人： Yusuke Yoshimura , Hiroki Ota , Masao Yuga , Yuichi Kamo , Kenichiro Eguchi
IPC分类号： C21D9/08 , C21D6/00 , C22C38/60 , C22C38/52 , C22C38/54 , C22C38/50 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/04 , C22C38/02 , C22C38/00
CPC分类号： C21D9/08 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/105 , C21D2211/001 , C21D2211/005 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/60
摘要： Provided herein is a dual-phase stainless steel having excellent carbon dioxide corrosion resistance, excellent sulfide stress corrosion cracking resistance, and excellent sulfide stress cracking resistance. The dual-phase stainless steel contains, in mass %, C: 0.03% or less, Si: 1.0% or less, Mn: 0.10 to 1.5%, P: 0.030% or less, S: 0.005% or less, Cr: 20.0 to 30.0%, Ni: 5.0 to 10.0%, Mo: 2.0 to 5.0%, Cu: 2.0 to 6.0%, N: less than 0.07%, and the balance Fe and unavoidable impurities, and has a structure that is 20 to 70% austenite phase, and 30 to 80% ferrite phase in terms of a volume fraction.
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公开(公告)号：US20190211413A1
公开(公告)日：2019-07-11
申请号：US16328087
申请日：2017-09-28
IPC分类号： C21D8/02 , C22C38/06 , C22C38/02 , C22C38/00 , C22C38/04 , C22C38/14 , C22C38/10 , C22C38/60 , C22C38/08 , C22C38/16 , C22C38/12 , C22C38/22 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/34 , C23C2/06 , C23C2/02 , C21D9/46
CPC分类号： C21D8/0263 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D9/46 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/38 , C22C38/60 , C23C2/02 , C23C2/06
摘要： Provided are a high-strength coated steel sheet and a method for manufacturing the same. The high-strength coated steel sheet has a base steel sheet and a coating layer formed on a surface of the base steel sheet. The base steel sheet has a specified chemical composition and a microstructure, including a martensite phase and a ferrite phase. A volume fraction of the martensite phase is 50% to 80%. A volume fraction of tempered martensite with respect to the whole martensite phase is 50% or more and 85% or less. An average grain diameter of the ferrite phase is 13 μm or less. A volume fraction of ferrite grains having an aspect ratio of 2.0 or less with respect to the whole ferrite phase is 70% or more. Yield strength (YP) of the high-strength coated steel sheet is 550 MPa or more.
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公开(公告)号：US20190185955A1
公开(公告)日：2019-06-20
申请号：US16324975
申请日：2017-08-29
IPC分类号： C21D8/02 , C22C38/06 , C22C38/38 , C22C38/34 , C22C38/22 , C22C38/28 , C22C38/32 , C22C38/14 , C22C38/12 , C22C38/10 , C22C38/08 , C22C38/00 , C22C38/16 , C22C38/60 , C23C2/06 , C23C2/02 , C23C2/40 , C21D9/46
CPC分类号： C21D8/0263 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D9/46 , C21D2211/005 , C21D2211/008 , C22C38/00 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/38 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/40
摘要： Provided are a high-strength steel sheet having high strength of a yield strength of 550 MPa or more and a method for manufacturing the same.The high-strength steel sheet has a specified chemical composition and a microstructure, where observed in a cross section in a thickness direction perpendicular to a rolling direction, including a martensite phase having a volume fraction of 50% to 80%, and a ferrite phase having an average grain diameter of 13 μm or less, wherein a volume fraction of ferrite grains having an aspect ratio of 2.0 or less with respect to the whole ferrite phase is 70% or more, and wherein an average length in a longitudinal direction (in a width direction of the steel sheet) of the ferrite grains is 20 μm or less, and a yield strength (YP) of 550 MPa or more.
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公开(公告)号：US20190185954A1
公开(公告)日：2019-06-20
申请号：US16324970
申请日：2017-08-29
IPC分类号： C21D8/02 , C22C38/06 , C22C38/02 , C22C38/04 , C22C38/00 , C22C38/22 , C22C38/28 , C22C38/12 , C22C38/14 , C22C38/32 , C22C38/60 , C22C38/58 , C22C38/54 , C22C38/50 , C22C38/48 , C22C38/46 , C22C38/44 , C23C2/06 , C23C2/02 , C23C2/40 , C21D9/46
CPC分类号： C21D8/0263 , B32B15/013 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D9/46 , C21D2211/001 , C21D2211/004 , C21D2211/005 , C21D2211/008 , C22C18/00 , C22C18/04 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/22 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/40
摘要： Provided are a steel sheet having a tensile strength of 950 MPa or more and good toughness and a method for manufacturing the same.The steel sheet has a specific composition and a metallographic structure containing: a ferrite area fraction of 30% or less (including 0%), a tempered martensite area fraction of 70% or more (including 100%), and a retained austenite area fraction of 4.5% or less (including 0%), wherein the average aspect ratio of an iron based carbide, precipitated in tempered martensite grains, having a grain size in the largest 10% is 3.5 or more.
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公开(公告)号：US20190078182A1
公开(公告)日：2019-03-14
申请号：US15999414
申请日：2018-08-20
发明人： ChangMin Chun , Jorge J. Perdomo
CPC分类号： B01J19/0026 , B01J19/002 , B01J19/02 , B22D13/00 , B22D13/02 , C10G9/203 , C10G9/36 , C21D9/08 , C22C19/05 , C22C19/055 , C22C19/058 , C22C30/00 , C22C38/005 , C22C38/04 , C22C38/06 , C22C38/38 , C22C38/40 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/54 , C23C8/10 , F16L9/02 , F16L58/08
摘要： This application relates to a heat transfer tube, its method of manufacture and its use for thermal cracking hydrocarbon feeds, such as thermal cracking in furnaces. The heat transfer tube comprises a chromium and aluminum carburization-resistant alloy capable of generating a typically continuous aluminum oxide scale under thermal cracking conditions that reduces coking and thereby enhances heat transfer. The carburization-resistant alloy comprises 25.1 to 55.0 wt. % nickel; 18.1 to 23.9 wt. % chromium; 4.1 to 7.0 wt. % aluminum; and iron. Additionally, the carburization-resistant alloy has at least one strengthening mechanism to provide desirable mechanical properties. The carburization-resistant alloy composition is also resistant to the formation of cracks during centrifugal casting.
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公开(公告)号：US20180371574A9
公开(公告)日：2018-12-27
申请号：US15574838
申请日：2016-07-05
发明人： Taro KIZU , Shunsuke TOYODA , Akimasa KIDO , Tetsushi TADANI
IPC分类号： C21D9/46 , C21D8/02 , C21D7/13 , C21D6/00 , C21D1/18 , C22C38/06 , C22C38/02 , C22C38/38 , C22C38/28 , C22C38/24 , C22C38/00 , B21B1/22
CPC分类号： C21D9/46 , B21B1/22 , B21B3/00 , B21B2001/225 , C21D1/18 , C21D6/005 , C21D6/008 , C21D7/13 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D2211/004 , C21D2211/005 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/24 , C22C38/28 , C22C38/38 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/58 , C22C38/60
摘要： This disclosure provides a predetermined composition, where a conversion value C* of total carbon contents in Ti, Nb and V precipitates whose grain sizes are less than 20 nm is 0.010 mass % to 0.100 mass %, Fe content in Fe precipitates is 0.03 mass % to 0.50 mass %, and an average grain size of ferrite grains whose grain sizes are top 5 % large in ferrite grain size distribution of rolling direction cross section is (4000/TS)2 μm or less, the TS indicating tensile strength in unit of MPa.
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9.发明申请公开(公告)号：US20180318923A1
公开(公告)日：2018-11-08
申请号：US16031891
申请日：2018-07-10
申请人： Murata Manufacturing Co., Ltd. , NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
发明人： Satoshi OGA , Kenta TAKAGI , Kimihiro OZAKI
CPC分类号： B22F1/0085 , B22F1/00 , B22F1/0088 , C22C38/00 , C22C38/005 , H01F1/059 , H01F41/02 , H01F41/0253
摘要： A raw material for a magnet, which comprises Sm and Fe. A magnet is obtained by nitriding this raw material for a magnet. In particular, a raw material for a magnet comprises an Sm—Fe binary alloy as a main component. An intensity ratio of an Sm2Fe17 (024) peak to an SmFe7 (110) peak is less than 0.001 as measured by an X-ray diffraction method.
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公开(公告)号：US20180286545A1
公开(公告)日：2018-10-04
申请号：US15939778
申请日：2018-03-29
申请人： TDK CORPORATION
发明人： Yoshinori FUJIKAWA , Masashi MIWA
CPC分类号： H01F1/0577 , C22C38/005 , H01F41/0293
摘要： An R-T-B based sintered magnet including a plural number of main phase particles having an R2T14B type crystal structure. R is at least one rare earth element essentially including heavy rare earth elements RH, T is at least one transition metal element essentially including Fe or Fe and Co, and B is boron. At least one of the main phase particles is a reverse core-shell main phase particle including a core part and a shell part, in which CRC/CRS>1.0 is satisfied when a total RH concentration (at %) in the core part is defined as CRC and a total RH concentration (at %) in the shell part is defined as CRS. An existence ratio of the reverse core-shell main phase particles is larger in a surface layer part of the magnet than in a central part of the magnet.
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