-
公开(公告)号：US20180195144A1
公开(公告)日：2018-07-12
申请号：US15531573
申请日：2015-09-08
发明人： Masaki MORINO , Hideaki KOBIKI , Tatsuya NAKAGAITO , Yuichi TOKITA , Toru MINOTE , Yoshikiyo TAMAI
CPC分类号： C21D9/50 , B21D22/022 , B21D22/20 , B21D22/203 , B21D22/208 , B21D37/16 , C21D1/673 , C21D8/0205 , C21D8/0278 , C22C18/00 , C23F17/00 , C25D3/22
摘要： A method for manufacturing a hot press formed part, includes: preparing a hot press forming object comprising a single-ply portion and a two-ply portion; heating the hot press forming object to a temperature range from an Ac3 transformation temperature of a base steel sheet of the first coated steel sheet to 1000° C.; press forming the hot press forming object to obtain a formed body, the press forming being started upon temperatures of the single-ply portion and of the two-ply portion being no higher than solidification points of Zn—Ni coating layers of the first and second coated steel sheets and no lower than an Ar3 transformation temperature of the base steel sheet of the first coated steel sheet; and quenching the formed body to thereby obtain a hot press formed part, in which the hot press forming object has a thickness ratio from 1.4 to 5.0.
-
公开(公告)号：US20200157646A1
公开(公告)日：2020-05-21
申请号：US16076138
申请日：2016-11-02
IPC分类号： C21D9/08 , C21D8/10 , C21D6/00 , C22C38/54 , C22C38/52 , C22C38/50 , C22C38/48 , C22C38/44 , C22C38/42 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/46
摘要： Provided is a high-strength seamless stainless steel pipe for oil country tubular goods which possesses a high strength, excellent low-temperature toughness and excellent corrosion resistance even when the steel pipe has a large wall thickness. The high-strength seamless stainless steel pipe has the composition which contains, by mass %, C: 0.05% or less, Si: 1.0% or less, Mn: 0.1 to 0.5%, P: 0.05% or less, S: less than 0.005%, Cr: more than 15.0% to 19.0% or less, Mo: more than 2.0% to 3.0% or less, Cu: 0.3 to 3.5%, Ni: 3.0% or more and less than 5.0%, W: 0.1 to 3.0%, Nb: 0.07 to 0.5%, V: 0.01 to 0.5%, Al: 0.001 to 0.1%, N: 0.010 to 0.100%, O: 0.01% or less, and Fe and unavoidable impurities as a balance. Nb, Ta, C, N and Cu satisfy a specified formula. The steel pipe has a microstructure which is formed of 45% or more of a tempered martensite phase, 20 to 40% of a ferrite phase, and more than 10% and 25% or less of a residual austenite phase in terms of volume ratio.
-
公开(公告)号：US20180358565A1
公开(公告)日：2018-12-13
申请号：US15735689
申请日：2016-08-19
发明人： Takashi KAWANO , Shin ISHIKAWA , Takuya MURAKAMI
CPC分类号： H01L51/0096 , C25D5/36 , H01L51/0097 , H01L51/4253 , H01L51/44 , Y02E10/549
摘要： Disclosed is a substrate for a photoelectric conversion element that is low in cost as compared with a conventional ITO/glass substrate, easy to handle, and does not lower the power generation performance of the solar cell. The substrate for a photoelectric conversion element is made of a stainless steel sheet having a passive film on a surface thereof, an atomic ratio Cr/(Fe+Cr) of the passive film on a surface thereof is 0.08 or more.
-
4.发明申请公开(公告)号：US20190352762A1
公开(公告)日：2019-11-21
申请号：US16305519
申请日：2017-05-31
IPC分类号： C23C8/22 , C21D9/32 , C21D1/06 , C21D8/06 , C21D9/52 , C22C38/28 , C22C38/26 , C22C38/22 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/06 , C23C8/02 , C23C8/80 , F16H55/06
摘要： A case hardening steel suitable as raw material for producing a mechanical structural part having high rotating bending fatigue strength and pitting fatigue strength at relatively low cost and a method of producing the case hardening steel are provided. A case hardening steel comprises a chemical composition containing, in mass %, C, Si, Mn, P, S, Cr, Mo, Al, N, and O in a predetermined relationship, with a balance being Fe and inevitable impurities, wherein √I≤80 (where I denotes an area (μm2) of an oxide-based inclusion located in a fish eye central portion at a fracture surface after subjecting the case hardening steel to carburizing-quenching and tempering and then performing a rotating bending fatigue test).
-
5.发明申请公开(公告)号：US20180298503A1
公开(公告)日：2018-10-18
申请号：US15737904
申请日：2016-07-07
摘要： A method of producing a cold rolled steel strip includes: subjecting a steel strip that has been cold rolled and subsequently continuously annealed to pickling by continuously feeding the steel strip into a mixed acid solution containing a first acid that is oxidizing and a second acid that is non-oxidizing to immerse the steel strip; and subsequently subjecting the steel strip to repickling by continuously feeding the steel strip into an acid solution containing a third acid that is non-oxidizing to immerse the steel strip. The concentration of the first acid in the mixed acid solution is lowered and the concentration of the second acid in the mixed acid solution is raised as the iron ion concentration in the mixed acid solution rises.
-
公开(公告)号：US20160348208A1
公开(公告)日：2016-12-01
申请号：US15114889
申请日：2015-01-26
发明人： Masao YUGA , Shinichi MIURA , Akio OHMORI
IPC分类号： C21D9/46 , C22C38/54 , C22C38/50 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/38 , C22C38/32 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/20 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/02 , C21D1/18 , C22C38/58
CPC分类号： C21D9/46 , C21D1/18 , C21D8/02 , C21D8/0226 , C21D8/0263 , C21D2211/001 , C21D2211/002 , 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 , C22C38/38 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58
摘要： An abrasion resistant steel plate having excellent low-temperature toughness and excellent cracking resistance in a portion which has been heated to a temperature range in which low-temperature temper embrittlement occurs and a method for manufacturing the steel plate. The steel plate includes a microstructure at positions located at ¼ of the thickness and at ¾ of the thickness including a martensite single phase microstructure having an average prior austenaite grain diameter in the range of 20 μm to 60 μm, or a mixed microstructure of martensite and bainite having a proportion of martensite-austenite constituent of less than 5% in terms of area ratio with respect to the whole microstructure.
摘要翻译： 在加热到发生低温回火脆化的温度范围的部分中具有优异的低温韧性和优异的耐龟裂性的耐磨钢板以及钢板的制造方法。 钢板包括在厚度为1/4的位置处的微结构，并且厚度为3/4，其包括具有在20μm至60μm范围内的平均先前奥氏体晶粒直径的马氏体单相微结构，或马氏体和 贝氏体相对于整个微观结构以面积比计小于5％的马氏体 - 奥氏体组分。
-
公开(公告)号：US20230133751A1
公开(公告)日：2023-05-04
申请号：US17801929
申请日：2021-02-12
发明人： Kenji SUZUKI , Yoshimitsu HARADA
摘要： A method for shape control in a rolling mill includes: a measurement step of measuring a shape of a steel sheet on a delivery side of the rolling mill; and a control step of controlling the rolling mill in a manner that the shape of the steel sheet falls within an allowable range, based on the shape of the steel sheet measured at the measurement step, wherein the control step includes a step of setting a control gain smaller than a control gain for a width of a steel sheet as a target for rolling being equal to or smaller than the predetermined value when the steel sheet as the target for rolling has a width greater than a predetermined value.
-
公开(公告)号：US11633811B2
公开(公告)日：2023-04-25
申请号：US16649661
申请日：2018-08-03
发明人： Naoki Yamaguchi , Tsuyoshi Shiozaki
IPC分类号： B23K31/00 , B23K9/23 , B23K9/02 , C21D9/50 , C21D7/06 , B23K9/32 , B32B15/01 , C21D7/00 , B32B15/00 , B32B3/02 , B23K9/22 , B32B3/30 , B23K31/10 , B23K101/00 , B23K9/00
摘要： A peening method which can sufficiently improve fatigue properties of a lap fillet welded joint having a thin steel sheet as a base sheet, in which a knocking pin having a predetermined shape is continuously knocked as a series of knocking toward a direction inclined relative to the welding direction, the series of knocking is repeatedly performed in the welding direction, at that time, a knocking mark group made of a plurality of knocking marks formed by the series of knocking is superimposed on at least a part of an adjacent knocking mark group while an end part in the direction orthogonal to the welding direction of the knocking mark group is separated from an end part in the direction orthogonal to the welding direction of the adjacent knocking mark group.
-
公开(公告)号：US20230120234A1
公开(公告)日：2023-04-20
申请号：US17909883
申请日：2021-02-09
发明人： Hiroyuki TANAKA
摘要： A method for manufacturing a pressed component including forming a metal sheet into a pressed component shape having: a cross section having a top sheet portion and a side wall portion continuous to at least one side in the width direction of the top sheet portion via a first bent portion; and having one or two or more curved portions in which the top sheet portion is curved to project or to be recessed in a side view along the longitudinal direction in the direction intersecting the cross section, the method which includes: a first preliminary forming step having a step of forming, to the metal sheet, first beads extending along the longitudinal direction at a position where the first bent portion is formed; and a first component forming step of forming the metal sheet after the first preliminary forming step into the pressed component shape.
-
10.发明授权公开(公告)号：US11628486B2
公开(公告)日：2023-04-18
申请号：US16970579
申请日：2019-02-21
发明人： Hiroto Miyake , Toyohisa Shinmiya , Yuji Yamasaki
摘要： A method includes press forming a metal sheet into an intermediate formed product bent out of a plane and forming into a desired press-formed component shape. In a region to be a flange portion, an angle to be bent out of the plane is equal to or less than an angle formed by the flange portion at the curved portion in the press-formed component shape. The projection portion has a largest projection height at the center portion in the longitudinal direction of the region to be the curved portion as seen in the side view, and a longitudinal length of a region to be the top sheet portion is set to coincide with or approach a longitudinal length of the top sheet portion in the press-formed component shape.
-
-
-
-
-
-
-
-
-
搜索结果
3011 条记录 (耗时 0.025 秒)