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公开(公告)号：US11542581B2
公开(公告)日：2023-01-03
申请号：US16082289
申请日：2017-03-09
发明人： Tomoyuki Kitaura , Yoshihisa Shirai , Hideki Fujii
IPC分类号： C22F1/18 , C22C14/00 , B32B15/01 , C22C1/08 , B21D22/02 , B21B1/02 , B21B3/00 , B23K20/02 , B22F7/02 , B22F7/00
摘要： A titanium product includes an inner layer portion and a surface layer portion joined to the inner layer portion. The surface layer portion has a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: 0.020% or less, the balance: Ti and impurities. The inner layer portion 3 has pores and a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: more than 0.020% and 0.60%, the balance: Ti and impurities. The area fraction of the pores in the inner layer portion in a cross-section perpendicular to the longitudinal direction of the titanium product is more than 0% and not more than 30%. The Cl content (ClI) of the inner layer portion, a thickness (tS) of the surface layer portion, and a thickness (tI) of the inner layer portion satisfy the expression [ClI≤0.03+0.02×tS/tI].
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公开(公告)号：US11453048B2
公开(公告)日：2022-09-27
申请号：US15770551
申请日：2016-11-07
发明人： Masahito Hanao , Daiki Naito
IPC分类号： B22D11/111 , B22D11/108 , B22D11/00 , C22C38/54 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38
摘要： A mold flux for continuous casting has a base material composition containing 25 to 60 mass % of CaO, 15 to 45 mass % of SiO2, 5 to 25 mass % of F, 0.2 to 1.0 mass % of S, and 0 to 20 mass % of a total of Li2O, Na2O, and K2O, and in the base material composition, f(1) is 0.90 to 1.90, f(2) is 0.10 to 0.40, f(3) is 0 to 0.40, and a total of CaO, SiO2, F, S, Li2O, Na2O, and K2O is 90 to 100 mass %.
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公开(公告)号：US11453042B2
公开(公告)日：2022-09-27
申请号：US16316444
申请日：2017-07-13
发明人： Shinji Kamoto , Koichi Kondo , Yusaku Kobayashi , Hideki Uchida , Yugo Matsui , Daisuke Hirota , Shunji Matsuzaki
摘要： A forging roll device includes, a pair of roll axes which are provided so that an axis center of each of the roll axes are parallel to each other and in which a die is attached to each of the roll axes; and a material holder/conveyer which conveys a held shaping target material between the pair of roll axes, wherein, each one of the pair of roll axes includes a plurality of die attaching surfaces positioned in a circumferential direction, and an outer circumferential surface between any of two of the plurality of die attaching surfaces in each one of the pair of roll axes is closer to a planar surface than a cylindrical surface with the axis center as the center.
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公开(公告)号：US11447849B2
公开(公告)日：2022-09-20
申请号：US16095995
申请日：2017-04-25
IPC分类号： C22C38/60 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C21D9/30 , C22C38/24 , C22C38/06 , C21D7/13 , C22C38/00 , C21C7/06 , C21D1/09 , C21D1/02
摘要： A non-heat treated steel for induction hardening contains, in mass %, C: 0.35 to 0.44%, Si: 0.01 to less than 0.30%, Mn: 0.80 to 1.50%, P: 0.030% or less, S: more than 0.010 to 0.095%, Cr: more than 0.10 to 0.30%, V: 0.050 to 0.200%, N: 0.0040 to 0.0200%, O: 0.0024% or less, Cu: 0.05% or less and Ni: 0.05% or less, and for which fn1≤50.0, fn2: 0.70 to 1.00, and fn3≥1.30. In the steel, a ratio of a number of Mn oxides containing oxygen in an amount of 20.0 mass % or more and Mn in an amount of 10.0 mass % or more to the number of oxides is 10.0% or less fn1=80C2+55C+13Si+4.8Mn+30P+30S+1.5Cr fn2=C+(Si/10)+(Mn/5)−(5S/7)+(5Cr/22)+1.65V fn3=−2C—Si+2.33Mn+0.26Cr+V−1.5Cu−1.5Ni.
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公开(公告)号：US11345982B2
公开(公告)日：2022-05-31
申请号：US16330655
申请日：2017-09-20
发明人： Tatsuya Iwasaki , Koji Watari , Hidekazu Sueno
IPC分类号： C22C38/06 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/26 , C22C38/54 , C22C38/60 , F16C3/02 , C21D1/10 , C21D1/28 , C21D9/28
摘要： A shaft part excellent in static torsional strength and torsional fatigue strength containing, by mass %, essential elements of C: 0.35 to 0.70%, Si: 0.01 to 0.40%, Mn: 0.5 to 2.6%, P: 0.050% or less, S: 0.005 to 0.020%, Al: 0.010 to 0.050%, N: 0.005 to 0.025%, and O: 0.003% or less, further containing optional elements, having a balance of Fe and impurities, having a chemical composition satisfying formula (1), having at least one hole at an outer circumferential surface, having a volume ratio (R1) of 4 to 20% of retained austenite at a position of a 2 mm depth from the outer circumferential surface, having a volume ratio of retained austenite at a position of a 2 mm depth from the outer circumferential surface in an axial direction of the hole and at a position of a 20 μm depth from the surface of the hole as R2, and having a reduction rate Δγ of 40% or more of retained austenite found by the formula (A): Δγ=[(R1−R2)/R1]×100: Formula (1): 15.0≤25.9C+6.35Mn+2.88Cr+3.09Mo+2.73Ni≤27.2 (Notations of elements in formula are contents of the elements).
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公开(公告)号：US11208702B2
公开(公告)日：2021-12-28
申请号：US16263457
申请日：2019-01-31
IPC分类号： C21D9/46 , C21D8/02 , B32B15/01 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/38 , B21B1/26 , B21B1/46 , B21B3/02 , C23C2/06 , C23C2/40 , C22C38/14 , C22C38/58 , B21B1/22 , C22C38/26 , C22C38/28 , C22C38/32
摘要： There is provided a hot-rolled steel sheet in which a composition contains: in mass %, C: 0.01% to 0.2%; Si: 2.5% or less; Mn: 4.0% or less; P: 0.10% or less; S: 0.03% or less; Al: 0.001% to 2.0%; N: 0.01% or less; O: 0.01% or less; Ti: 0.01 to 0.30%; and the balance being composed of iron and impurities and a structure is composed of by volume fraction, 90% or more of tempered martensite with an average aspect ratio of 2 or less, or 90% or more in total of both tempered martensite and lower bainite.
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公开(公告)号：US11180835B2
公开(公告)日：2021-11-23
申请号：US15757264
申请日：2015-09-25
发明人： Kohei Ueda , Hiroyuki Kawata , Takayuki Kitazawa , Takeshi Yasui , Hiroyuki Ban
IPC分类号： C22C38/38 , C21D9/46 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/22 , C22C38/28 , C23F17/00 , C23G1/08 , C25D3/12 , C25D5/36
摘要： A steel sheet has a predetermined chemical composition, and a surface exhibits an absorption peak at which a reflectance is not less than 50% nor more than 85% in a range of wave numbers of 1200 cm−1 to 1300 cm−1 by a Fourier transform-infrared spectroscopy analysis by a reflection absorption spectrometry method, and does not exhibit an absorption peak in a range of wave numbers of 1000 cm−1 to 1100 cm−1, or exhibits an absorption peak at which a reflectance is 85% or more in the range of wave numbers of 1000 cm−1 to 1100 cm−1, wherein Ni of 3 mg/m2 to 100 mg/m2 adheres to the surface.
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公开(公告)号：US11167369B2
公开(公告)日：2021-11-09
申请号：US16325524
申请日：2017-09-29
发明人： Yasushi Hasegawa , Hirokazu Okada
IPC分类号： B23K9/23 , B23K9/235 , C22C38/06 , C22C38/00 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/02 , C22C38/04 , C21D9/50 , C21D9/08 , B23K26/24 , B23K9/16 , B23K9/02 , B23K26/60 , B23K26/70 , B23K26/32 , B23K15/00 , B23K103/04 , B23K101/12
摘要： A method of manufacturing a welded structure of a ferritic heat-resistant steel is provided that prevents Type IV damage and that has good on-site operability without adding a high B concentration. The method includes: the step of preparing a base material including 8.0 to 12.0% Cr, less than 0.005% B and other elements; the step of forming an edge on the base material; a pre-weld heat treatment step in which a region located between a surface of the edge and a position distant from the surface of the edge by a pre-weld heat treatment depth of 30 to 100 mm is heated to a temperature of 1050 to 1200° C. and is held at this temperature for 2 to 30 minutes; a welding step in which the edge is welded to form the weld metal; and a post-weld heat treatment step in which a region located between the surface of the edge and a position distant from the surface of the edge by a distance not smaller than the pre-weld heat treatment depth and not greater than 100 mm is heated to a temperature of 720 to 780° C. and is held at this temperature for a time period not shorter than 30 minutes and satisfying the following formula, (1): (Log(t)+12)·(T+273)
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公开(公告)号：US11148183B2
公开(公告)日：2021-10-19
申请号：US15512485
申请日：2015-09-17
发明人： Masahiko Sato , Tohru Yoshida
摘要： A method of production of a shaped article able to suppress occurrence of shaping defects, that is, a method of production of a shaped article including a first step of press-forming a metal plate (1a) into a U-shape to obtain a U-shaped article (1b) having a bottom part (2) straight extending in a longitudinal direction and a second step of press-forming the U-shaped article (1b) to bend it in the longitudinal direction so that the bottom part (2) of the part projects to the inside and obtain a U-cross-section bent article (1c).
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公开(公告)号：US11135633B2
公开(公告)日：2021-10-05
申请号：US16313451
申请日：2017-06-26
发明人： Yasuharu Tanaka , Toshimitsu Aso , Takashi Miyagi , Misao Ogawa , Shinobu Yamamoto , Keita Ikegami
摘要： A method or apparatus to produce an L-shaped pressed component includes, where a portion of a blank, having tensile strength of 1180 MPa or more, is held in a state of being clamped by a blank holder and a die, and a portion of the blank, to be formed into a top plate is held in a state of being clamped by a pad and a punch; the second step where a vertical wall, a concave ridge and a flange on the inner side of a curved portion are formed by, bend forming with a bending die, forming one, two or more material inflow promoting portion; and the third step where the die is moved in a direction toward a side where the blank holder is disposed to form a vertical wall, a concave ridge, and a flange on the outer side of the curved portion by draw forming.
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