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公开(公告)号：US20170306434A1
公开(公告)日：2017-10-26
申请号：US15513130
申请日：2014-10-16
IPC分类号： C21D9/46 , C21D6/00 , 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 , C22C38/58 , C23G1/08
CPC分类号： C21D9/46 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D2211/003 , C21D2211/005 , 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 , C23G1/081
摘要： A high-carbon steel sheet includes: a chemical composition represented by, in mass %, C: 0.30% to 0.70%, B: 0.0004% to 0.0035%, and others; and a structure represented by a spheroidized ratio of cementite: 80% or more; and an average diameter of cementite: 0.3 μm to 2.2 μm, wherein a coefficient of micro-friction of ferrite on a surface of the steel sheet is less than 0.5.
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公开(公告)号：US20180021836A1
公开(公告)日：2018-01-25
申请号：US15540899
申请日：2016-01-07
摘要： There is provided a method of manufacturing a tooth-shaped component including drawing process of draw-forming a workpiece so as to obtain a cylindrical container which has a bottom surface portion and a side surface portion; diameter-reducing process of reducing a diameter of a particular part in which a tooth tip portion is to be formed in the side surface portion of the cylindrical container, so as to increase a thickness of a corner portion such that an external shape of the corner portion between the bottom surface portion and the side surface portion satisfies the following conditional expression (1); and tooth shape-forming process of forming the tooth tip portion in the particular part of the cylindrical container reduced in diameter in the diameter-reducing process, so as to obtain a tooth-shaped component which has the bottom surface portion, the side surface portion, and the tooth tip portion. (ΔR+ΔH)≦2t (1)
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公开(公告)号：US20170067132A1
公开(公告)日：2017-03-09
申请号：US15123119
申请日：2015-03-09
IPC分类号： C21D9/46 , C22C38/32 , C22C38/16 , C22C38/14 , C21D8/02 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/60 , C22C38/12
CPC分类号： C21D9/46 , C21D1/32 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0473 , C21D2201/05 , C21D2211/001 , C21D2211/002 , C21D2211/003 , C21D2211/004 , C21D2211/005 , C21D2211/008 , C21D2211/009 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/32 , C22C38/60
摘要： A middle/high carbon steel sheet according to an aspect of the present invention is a steel sheet, in which composition thereof contains, by mass %, C: 0.10% to 1.50%, Si: 0.01% to 1.00%, Mn: 0.01% to 3.00%, P: 0.0001% to 0.1000%, and S: 0.0001% to 0.1000%, and a remainder consisting of Fe and impurities, in which the steel sheet has a structure in which a total volume percentage of a martensite, a bainite, a pearlite, and a residual austenite is equal to or lower than 5.0%, and a remainder thereof is a ferrite and carbides, in which a spheroidizing ratio of carbide particles is 70% to 99%, and in which a proportion of a number of the carbide particles including a crystal interface at which an orientation difference is equal to or greater than 5° in the carbide particles is equal to or lower than 20% of a total number of the carbide particles.
摘要翻译： 本发明的中高碳钢板是以质量％计含有C：0.10〜1.50％，Si：0.01〜1.00％，Mn：0.01％的钢板， 至3.00％，P：0.0001％至0.1000％，S：0.0001％至0.1000％，余量由Fe和杂质组成，其中钢板具有马氏体，贝氏体的总体积百分比 ，珠光体和残留奥氏体等于或低于5.0％，其余部分是碳化物粒子的球化比为70％〜99％的铁素体和碳化物，其中， 包含在碳化物粒子中取向差为5°以上的结晶界面的碳化物粒子等于或低于碳化物粒子总数的20％。
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公开(公告)号：US20180230582A1
公开(公告)日：2018-08-16
申请号：US15576177
申请日：2016-05-25
发明人： Kengo TAKEDA , Kazuo HIKIDA , Ken TAKATA , Motonori HASHIMOTO , Toshimasa TOMOKIYO , Yasushi TSUKANO , Takashi ARAMAKI
IPC分类号： C22C38/60 , C21D8/04 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00
CPC分类号： C22C38/60 , C21D8/02 , C21D8/0463 , C21D9/46 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54
摘要： Low carbon steel plate excellent impact resistance characteristics after carburizing and quenching and after tempering, characterized by having a predetermined chemical composition, an average grain size of carbides of 0.4 μm to 2.0 μm, an area ratio of pearlite of 6% or less, a ratio of a number of carbides at the ferrite grain boundaries to the number of carbides inside the ferrite grains of over 1, and a Vickers hardness of 100HV to 180HV.
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公开(公告)号：US20160289787A1
公开(公告)日：2016-10-06
申请号：US15038120
申请日：2014-11-21
CPC分类号： C21D9/46 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0273 , C21D2211/003 , C21D2211/005 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/28
摘要： A high-carbon steel sheet has a chemical composition represented by, in mass %, C: 0.60% to 0.90%, Mn: 0.30% to 1.50%, and Cr: 0.20% to 1.00%, and others, and has a structure represented by a concentration of Mn contained in cementite: 2% or more and 8% or less, a concentration of Cr contained in cementite: 2% or more and 8% or less, an average grain diameter of ferrite: 10 μm or more and 50 μm or less, an average particle diameter of cementite: 0.3 μm or more and 1.5 μm or less, and a spheroidized ratio of cementite: 85% or more.
摘要翻译： 高碳钢板的化学成分以C：0.60〜0.90％，Mn：0.30〜1.50％，Cr：0.20〜1.00％的质量％表示，并具有以下结构： 通过渗碳体含有的Mn浓度为2％以上8％以下，渗碳体中所含的Cr浓度为2％以上8％以下，铁素体的平均粒径为10μm以上且50以下 以下，渗碳体的平均粒径为0.3μm以上且1.5μm以下，并且，渗碳体的球化率为85％以上。
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