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公开(公告)号:US20190249280A1
公开(公告)日:2019-08-15
申请号:US16061464
申请日:2016-12-14
IPC分类号: C22C38/32 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28
CPC分类号: C22C38/32 , C21D9/04 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/54
摘要: A method for selecting a rail steel and a wheel steel comprising: selecting a rail steel and a wheel steel to be used as a rail and a wheel on an actual track, respectively, the rail steel and the wheel steel having a specific chemical composition, such that the rail comprises a head portion having a yield strength YSR of 830 MPa or more, the wheel comprises a rim portion having a yield strength YSW of 580 MPa or more, and a ratio YSR/YSW of the yield strength YSR at the head portion of the rail to the yield strength YSW at the rim portion of the wheel falls within a range of: 0.85≤YSR/YSW≤1.95 (1).
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公开(公告)号:US20190233914A1
公开(公告)日:2019-08-01
申请号:US16333729
申请日:2017-09-21
IPC分类号: C21D9/46 , C22C38/60 , C22C38/34 , C22C38/26 , C22C38/22 , C22C38/20 , C22C38/14 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/00 , C21D8/12 , C21D8/00 , C21D6/00 , H01F1/147
CPC分类号: C21D9/46 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/005 , C21D8/1222 , C21D8/1233 , C21D8/1238 , C21D8/1266 , C21D8/1272 , C21D8/1283 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/14 , C22C38/20 , C22C38/22 , C22C38/26 , C22C38/34 , C22C38/60 , C22C2202/02 , H01F1/147 , H01F1/16 , Y02P10/212
摘要: Provided is a grain-oriented electrical steel sheet that has excellent magnetic properties and can be manufactured by secondary recrystallization orientation control using coil annealing with high productivity. A grain-oriented electrical steel sheet comprises a specific chemical composition, wherein an average value of a deviation angle (α2+β2)1/2 calculated from a deviation angle α from ideal Goss orientation around an ND rotation axis and a deviation angle β from ideal Goss orientation around a TD rotation axis is 5.0° or less, and an area ratio Rβ of crystal grains with β≤0.50° is 20% or less.
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公开(公告)号:US20190211414A1
公开(公告)日:2019-07-11
申请号:US16333339
申请日:2017-08-08
发明人: Hiroshi OKANO , Shusaku TAKAGI
IPC分类号: C21D8/10 , C22C38/06 , C22C38/02 , C22C38/04 , C22C38/00 , C22C38/22 , C22C38/44 , C22C38/58
CPC分类号: C21D8/105 , C21D6/004 , C21D6/005 , C21D6/008 , C21D7/12 , C21D9/085 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/44 , C22C38/58 , F17C1/00 , F17C13/00 , F17C2201/0104 , F17C2203/0604 , F17C2203/0639 , F17C2203/0648 , F17C2203/0663 , F17C2203/0675 , F17C2221/012 , F17C2223/0123 , F17C2223/036 , F17C2260/011 , F17C2270/0178 , F17C2270/0184 , Y02E60/321
摘要: A steel pipe or tube for pressure vessels having excellent quench crack resistance is provided. The steel pipe or tube for pressure vessels comprises: a specific chemical composition; and a metallic microstructure in which an average grain size of prior austenite grains is 500 μm or less, and an area fraction of microstructures other than ferrite is 50% or more.
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公开(公告)号:US20190210110A1
公开(公告)日:2019-07-11
申请号:US16356572
申请日:2019-03-18
发明人: Yasunori Sonoda , Ryota Take
CPC分类号: B22F3/162 , B22F1/007 , B22F2301/35 , B22F2998/10 , C22C38/00 , C22C38/04 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/18 , C22C38/22 , C22C38/44 , B22F3/02 , B23B1/00 , B22F3/10
摘要: Provided is a method for manufacturing a sintered component having a hole formed therein, in which a sintered component having no defect, such as cracks, can be manufactured with good productivity and also a reduction in tool life accompanied by forming the hole can be suppressed. The method for manufacturing a sintered component includes a molding step of press-molding a raw material powder containing a metal powder and thus fabricating a green body; a drilling step of forming a hole in the green body using a candle-type drill and thus forming a thin-walled portion, of which a thickness Gt as measured between an inner circumferential surface of the hole and an outer surface of the green body is smaller than a diameter Gd of the hole; and a sintering step of sintering the green body after the drilling step.
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公开(公告)号:US20190203317A1
公开(公告)日:2019-07-04
申请号:US16329504
申请日:2017-09-28
IPC分类号: C21D9/46 , C22C38/06 , C22C38/00 , C22C38/60 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/04 , C22C38/02 , C22C38/08 , C22C38/16 , C22C38/14 , C22C38/12 , C21D8/02
CPC分类号: C21D9/46 , C21D1/18 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0247 , C21D2211/002 , C21D2211/008 , 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 , C22C38/26 , C22C38/28 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/28 , C23C2/40
摘要: A steel sheet having a specified chemical composition and a method for producing the steel sheet. The steel sheet has a microstructure including martensite and bainite. The total area fraction of the martensite and the bainite to the entirety of the microstructure is 95% or more and 100% or less. The balance of the microstructure is at least one of ferrite and retained austenite. The microstructure includes specific inclusion clusters, the content of the inclusion clusters in the microstructure being 5 clusters/mm2 or less. The microstructure includes prior-austenite grains having an average size of more than 5 μm. The steel sheet has a tensile strength of 1320 MPa or more.
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6.
公开(公告)号:US20180355455A1
公开(公告)日:2018-12-13
申请号:US15562321
申请日:2016-03-31
发明人: Akira SHIGA , Manabu KUBOTA , Hajime HASEGAWA
IPC分类号: C21D9/52 , C21D8/06 , C21D6/00 , C22C38/28 , C22C38/22 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , B21B1/16
CPC分类号: C21D9/525 , B21B1/16 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/06 , C21D8/065 , C21D2211/002 , C21D2211/005 , C21D2211/009 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/50
摘要: The present invention adopts a hot rolled bar or hot rolled wire rod including a chemical composition including, by mass %, C: 0.05 to 0.30%, Si: 0.30 to 0.60%, Mn: 0.40 to 1.0%, S: 0.008 to less than 0.040%, Cr: 1.60 to 2.00%, Mo: 0.1% or less, Al: 0.025 to 0.05%, N: 0.010 to 0.025%, Ti: 0.003% or less, Bi: 0.0001 to 0.0050%, and a remainder including Fe and impurities, in which amounts of P and O in the impurities are respectively P: 0.025% or less and O: 0.002% or less; in which a microstructure includes ferrite-pearlite or ferrite-pearlite-bainite, and an Expression (1) is satisfied. 1.70≤Cr+2×Mo≤2.10 (1)
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7.
公开(公告)号:US20180327881A1
公开(公告)日:2018-11-15
申请号:US15527893
申请日:2015-08-20
发明人: Masao YUGA , Yasuhide ISHIGURO , Mitsuhiro OKATSU , Seiji NABESHIMA , Hiroki OTA
IPC分类号: C21D9/08 , C21D8/10 , C21D6/02 , C22C38/50 , C22C38/54 , C22C38/48 , C22C38/46 , C22C38/44 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/42 , C22C38/32 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/22 , C22C38/20
CPC分类号: C21D9/085 , C21D1/18 , C21D6/02 , C21D8/10 , C21D8/105 , C21D9/08 , C21D2211/001 , C21D2211/004 , C21D2211/008 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54
摘要: A seamless steel pipe having a specific chemical composition. A ratio of Ti to N is in a range of 2.0 to 5.0. The steel pipe has a microstructure including tempered martensite having a volume ratio of 95% or more, and prior austenite grains having a grain size number of 8.5 or more. In a cross-section perpendicular to a rolling direction of the steel pipe a number of nitride-based inclusions having a particle size of 4 um or more is 100 or less per 100 mm2, a number of nitride-based inclusions having a particle size of less than 4 μm is 1000 or less per 100 mm2, a number of oxide-based inclusions having a particle size of 4 μm or more is 40 or less per 100 mm2, and a number of oxide-based inclusions having a particle size of less than 4 μm is 400 or less per 100 mm2.
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8.
公开(公告)号:US20180320737A1
公开(公告)日:2018-11-08
申请号:US15771892
申请日:2016-10-12
申请人: NTN CORPORATION
发明人: Michio HORI , Hideto TORISAWA , Hiroshi YUKI , Chikara OHKI , Kazuhiro YAGITA
IPC分类号: F16C19/38 , F16C33/62 , F16C33/64 , F16C43/04 , C21D1/10 , C21D1/28 , C22C38/22 , C22C38/44 , C21D9/40 , C21D7/06
CPC分类号: F16C19/385 , C21D1/10 , C21D1/28 , C21D7/06 , C21D9/40 , C22C38/00 , C22C38/22 , C22C38/44 , F03D80/70 , F05B2240/50 , F16C19/38 , F16C33/62 , F16C33/64 , F16C43/04 , F16C2360/31 , Y02P10/253
摘要: A method for producing a bearing ring of a double row tapered roller bearing includes the steps of: preparing a formed body; forming a heated region; cooing; and removing. In the step of forming a heated region, an induction heating coil arranged to face part of the groove and induction-heating the fixated body is relatively rotated along the circumferential direction of the groove to form a heated region including the bottom surface of the groove and heated to a temperature of at least an Al point. In the cooling step, the whole of the heated region is simultaneously cooled to a temperature of not more than an Ms point. After the step of forming a heated region before the step of cooling, the method further includes the step of retaining the formed body in a state where heating is stopped.
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9.
公开(公告)号:US20180269496A1
公开(公告)日:2018-09-20
申请号:US15761502
申请日:2016-09-20
发明人: Yoshio TARUTANI
IPC分类号: H01M8/0228 , H01M8/021 , H01M8/0213 , H01M8/241 , C22C38/46 , C22C38/44 , C22C38/42 , C22C38/24 , C22C38/22 , C22C38/20 , C22C38/06 , C22C38/02 , C22C38/04 , C22C38/00 , C21D8/02 , C21D8/00 , C21D6/00 , C21D6/02
CPC分类号: H01M8/0228 , C21D6/004 , C21D6/005 , C21D6/008 , C21D6/02 , C21D8/005 , C21D8/021 , C21D8/0226 , C21D8/0263 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/32 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/54 , H01M8/021 , H01M8/0213 , H01M8/241 , H01M2008/1095 , H01M2300/0082
摘要: A carbon separator for a solid polymer fuel cell is provided that includes a core material made of steel, and a carbon layer. The chemical composition of the steel is, by mass %, C: more than 0.02% to 0.12% or less, Si: 0.05 to 1.5%, Al: 0.001 to 1.0%, Mn: 0.01 to 1.0%, P: 0.045% or less, S: 0.01% or less, N: 0.06% or less, V: 0.5% or less, Cr: more than 13.0% to less than 25.0%, Mo: 0 to 2.5%, Ni: 0 to 0.8%, Cu: 0 to 0.8%, REM: 0 to 0.1%, B: 0 to 1.0%, Sn: 0 to 2.5%, In: 0 to 0.1%, and the balance: Fe and impurities. The steel has therein precipitates including M23C6 type Cr carbides that are finely precipitated and dispersed. A part of the precipitates protrude from the steel surface.
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公开(公告)号:US20180265951A1
公开(公告)日:2018-09-20
申请号:US15516584
申请日:2014-10-02
发明人: Masataka YOSHINO , Akito MIZUTANI , Mitsuyuki FUJISAWA , Ayako TA
IPC分类号: C22C38/28 , C22C38/26 , C22C38/22 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/02
CPC分类号: C22C38/28 , C21D6/002 , C21D8/0263 , C21D8/0273 , C21D8/0463 , C21D8/0473 , C21D9/46 , C21D2211/005 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/22 , C22C38/26 , C22C38/32
摘要: A ferritic stainless steel having sufficient corrosion resistance and excellent formability and ridging resistance. The ferritic stainless steel having a chemical composition comprising, by mass %, C: 0.005% or more and 0.035% or less, Si: 0.25% or more and less than 0.40%, Mn: 0.05% or more and 0.35% or less, P: 0.040% or less, S: 0.01% or less, Cr: 15.5% or more and 18.0% or less, Al: 0.001% or more and 0.10% or less, N: 0.01% or more and 0.06% or less, and the balance being Fe and inevitable impurities. Si and Mn satisfy the relational expression 29.5×Si−50×Mn+6≥0, where Si and Mn in the relational expression respectively denote the content, by mass %, of the corresponding chemical element.
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