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公开(公告)号：US11365460B2
公开(公告)日：2022-06-21
申请号：US16971719
申请日：2019-02-20
发明人： Yuka Miyamoto , Yoichiro Matsui , Shogo Sato , Takeshi Yokota
摘要： A high-carbon cold rolled steel sheet having a specified chemical composition, and a method for manufacturing the same. The method includes forming a hot rolled steel sheet, performing cooling at an average cooling rate of 30° C./s or more and 70° C./s or less through a temperature range of a finish rolling end temperature to 660° C., coiling a hot rolled steel sheet at a temperature of 500° C. or more and 660° C. or less, and, optionally, pickling the coiled hot rolled steel sheet, and then performing a first box-annealing of holding at an annealing temperature in a temperature range of 650 to 720° C., then performing cold rolling at a rolling reduction ratio of 20 to 50%, and then performing a second box-annealing of holding at an annealing temperature in a temperature range of 650 to 720° C.
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公开(公告)号：US20200232074A1
公开(公告)日：2020-07-23
申请号：US16486908
申请日：2018-02-13
摘要： Provided are a high-carbon hot-rolled steel sheet with excellent formability and hardenability and a method for manufacturing the same.The high-carbon hot-rolled steel sheet has a composition containing, on a mass basis, C: 0.10% to 0.33%, Si: 0.15% to 0.35%, Mn: 0.5% to 0.9%, P: 0.03% or less, S: 0.010% or less, sol. Al: 0.10% or less, N: 0.0065% or less, and Cr: 0.90% to 1.5%, the remainder being Fe and inevitable impurities, has a microstructure containing ferrite and cementite, a cementite density being 0.25 grains/μm2 or less, and has a hardness of 110 HV to 160 HV and a total elongation of 40% or more.
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3.发明申请公开(公告)号：US20170204521A1
公开(公告)日：2017-07-20
申请号：US15475393
申请日：2017-03-31
发明人： Yuka Miyamoto , Takeshi Suzuki , Hiroki Iwasa , Norihlko Nakamura , Masao Inose , Hisato Noro , Yoichi Tobiyama
IPC分类号： C23C28/02 , C25D3/12 , C25D3/20 , C25D3/38 , C21D8/02 , C25D5/36 , C25F1/00 , C23G1/08 , C23C22/50 , C21D9/46 , C25D3/54 , C25D3/22
CPC分类号： C23C28/021 , C21D8/0221 , C21D8/0278 , C21D9/46 , C23C22/50 , C23G1/081 , C25D3/02 , C25D3/12 , C25D3/20 , C25D3/22 , C25D3/30 , C25D3/38 , C25D3/54 , C25D5/10 , C25D5/12 , C25D5/36 , C25D5/50 , C25D5/505 , C25D7/00 , C25D9/08 , C25D9/10 , C25F1/00 , Y10T428/12569 , Y10T428/12806
摘要： A coated steel sheet includes a corrosion-resistant coating composed of at least one layer selected from the group consisting of a Ni layer, a Sn layer, an Fe—Ni alloy layer, an Fe—Sn alloy layer, and an Fe—Ni—Sn alloy layer disposed on at least one surface of a steel sheet, and an adhesive coating disposed on the corrosion-resistant coating, the adhesive coating containing Zr and further containing at least one metal element selected from the group consisting of Co, Fe, Ni, V, Cu, Mn, and Zn, in total, at a ratio by mass of 0.01 to 10 with respect to Zr. The coated steel sheet has excellent humid resin adhesion and corrosion resistance, in which streaky surface defects do not occur.
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公开(公告)号：US11434542B2
公开(公告)日：2022-09-06
申请号：US16964627
申请日：2019-01-22
IPC分类号： C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/60 , C21D8/02 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54
摘要： A high-carbon hot-rolled steel sheet has a composition containing, on a percent by mass basis, C: 0.10% or more and less than 0.20%, Si: 0.5% or less, Mn: 0.25% to 0.65%, P: 0.03% or less, S: 0.010% or less, sol. Al: 0.10% or less, N: 0.0065% or less, Cr: 0.05% to 0.50%, and B: 0.0005% to 0.005%, the balance being Fe and incidental impurities, the high-carbon hot-rolled steel sheet having a microstructure containing ferrite and cementite, in which the percentage of the number of cementite grains having an equivalent circular diameter of 0.1 μm or less is 12% or less based on the total number of cementite grains, the amount of Cr dissolved in the steel sheet is 0.03% to 0.50%, and the high-carbon hot-rolled steel sheet has a hardness of 73 or less in terms of HRB and a total elongation of 37% or more.
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公开(公告)号：US10392709B2
公开(公告)日：2019-08-27
申请号：US15475393
申请日：2017-03-31
发明人： Yuka Miyamoto , Takeshi Suzuki , Hiroki Iwasa , Norihiko Nakamura , Masao Inose , Hisato Noro , Yoichi Tobiyama
IPC分类号： C23C28/02 , C25D5/10 , C25D5/12 , C25D7/00 , C25D9/08 , C25D9/10 , C25D3/02 , C25D3/12 , C21D8/02 , C21D9/46 , C23C22/50 , C23G1/08 , C25D3/20 , C25D3/22 , C25D3/38 , C25D3/54 , C25D5/36 , C25F1/00 , C25D3/30 , C25D5/50
摘要： A coated steel sheet includes a corrosion-resistant coating composed of at least one layer selected from the group consisting of a Ni layer, a Sn layer, an Fe—Ni alloy layer, an Fe—Sn alloy layer, and an Fe—Ni—Sn alloy layer disposed on at least one surface of a steel sheet, and an adhesive coating disposed on the corrosion-resistant coating, the adhesive coating containing Zr and further containing at least one metal element selected from the group consisting of Co, Fe, Ni, V, Cu, Mn, and Zn, in total, at a ratio by mass of 0.01 to 10 with respect to Zr. The coated steel sheet has excellent humid resin adhesion and corrosion resistance, in which streaky surface defects do not occur.
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公开(公告)号：US09738978B2
公开(公告)日：2017-08-22
申请号：US15181798
申请日：2016-06-14
IPC分类号： C23C22/83 , C23C22/73 , C23C22/78 , C23C22/82 , C23C10/28 , C23C22/34 , C23C28/00 , C21D8/02 , C21D9/46 , C25D5/12 , C25D5/36 , C25D5/50 , C25D11/34 , C23C22/07 , C23C22/00 , C23C22/36 , C23C22/62 , C23C22/05 , B32B1/08 , B32B15/09 , B32B15/18 , C25D5/48 , C23C22/77
CPC分类号： C23C22/83 , B32B1/08 , B32B15/09 , B32B15/18 , B32B2250/03 , B32B2250/40 , B32B2255/06 , B32B2255/205 , B32B2255/26 , B32B2255/28 , B32B2439/66 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C21D9/46 , C23C10/28 , C23C22/00 , C23C22/05 , C23C22/07 , C23C22/34 , C23C22/36 , C23C22/361 , C23C22/62 , C23C22/73 , C23C22/77 , C23C22/78 , C23C22/82 , C23C28/00 , C23C28/321 , C23C28/322 , C23C28/325 , C23C28/34 , C23C28/3455 , C25D5/12 , C25D5/36 , C25D5/48 , C25D5/505 , C25D11/34 , Y10T428/12569
摘要： A manufacturing method for steel sheets for containers produces steel sheets with excellent film adhesion qualities. This steel sheet for containers has, on a steel sheet, a chemical conversion coating with a metal Zr content of 1-100 mg/m2, a P content of 0.1-50 mg/m2, and an F content of no more than 0.1 mg/m2, upon which is formed a phenolic resin layer with a C content of 0.1-50 mg/m2. Moreover, the manufacturing method for steel sheets for containers is a method for obtaining the steel sheet for containers wherein the chemical conversion coating is formed on the steel sheet by subjecting the steel sheet to immersion in or electrolytic treatment with a treatment solution containing Zr ions, phosphoric acid ions, and F ions; and subsequently, the steel sheet upon which the chemical conversion coating has been formed is immersed in, or undergoes topical application of, an aqueous solution containing phenolic resin, then dried.
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公开(公告)号：US10400299B2
公开(公告)日：2019-09-03
申请号：US14903911
申请日：2014-07-08
发明人： Yuka Miyamoto , Takashi Kobayashi , Chikara Kami
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/60 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/18 , C21D6/00 , C22C38/32 , C21D1/32
摘要： There is provided a high-carbon hot-rolled steel sheet and method for producing the same. The steel sheet has excellent hardenability consistently, even when annealed in a nitrogen atmosphere, and excellent workability. The steel sheet has a hardness in the range of 65 or less in terms of HRB and a total elongation El of 40% or more before a quenching treatment is performed.
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公开(公告)号：US20220170126A1
公开(公告)日：2022-06-02
申请号：US17425824
申请日：2020-01-14
发明人： Yuka Miyamoto , Yasuhiro Sakurai , Yoshihiko Ono
IPC分类号： C21D9/46 , C22C38/46 , C22C38/44 , C22C38/54 , C22C38/28 , C22C38/26 , C22C38/20 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/02 , C21D6/00
摘要： A high-carbon hot-rolled steel sheet and a method for manufacturing the steel sheet are provided. The high-carbon hot-rolled steel sheet has a particular chemical composition. The microstructure of the steel sheet includes ferrite, cementite, and pearlite that accounts for 6.5% or less of the entire microstructure by area fraction. The proportion of the number of cementite grains having an equivalent circle diameter of 0.1 μm or less to the total number of cementite grains is 20% or less, the average cementite grain size is 2.5 μm or less, and the cementite accounts for 3.5% or more and 10.0% or less of the entire microstructure by area fraction. The average concentration of solute B in a region extending from a surface layer to a depth of 100 μm is 10 mass ppm or more. The average concentration of N present as AlN in the region is 70 mass ppm or less.
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公开(公告)号：US20220106663A1
公开(公告)日：2022-04-07
申请号：US17425112
申请日：2020-01-14
发明人： Yuka Miyamoto , Yasuhiro Sakurai , Yoshihiko Ono
IPC分类号： C21D9/46 , C21D8/02 , C21D6/00 , C22C38/54 , C22C38/46 , C22C38/28 , C22C38/26 , C22C38/22 , C22C38/20 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00
摘要： A high-carbon hot-rolled steel sheet and a method for manufacturing the steel sheet are provided. The high-carbon hot-rolled steel sheet has a particular chemical composition. The microstructure of the steel sheet includes ferrite, cementite, and pearlite that accounts for 6.5% or less of the entire microstructure by area fraction. The proportion of the number of cementite grains having an equivalent circle diameter of 0.1 μm or less to the total number of cementite grains is 20% or less, the average cementite grain size is 2.5 μm or less, and the cementite accounts for 1.0% or more and less than 3.5% of the entire microstructure by area fraction. The average concentration of solute B in a region extending from a surface layer to a depth of 100 μm is 10 mass ppm or more. The average concentration of N present as AlN in the region is 70 mass ppm or less.
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10.发明申请HIGH-CARBON HOT ROLLED STEEL SHEET WITH EXCELLENT HARDENABILITY AND SMALL IN-PLANE ANISTROPY AND METHOD FOR MANUFACTURING THE SAME (AS AMENDED) 审中-公开具有优异的可再生性和小型平面图的高碳热轧钢板及其制造方法（如修改）公开(公告)号：US20150000801A1
公开(公告)日：2015-01-01
申请号：US14370121
申请日：2012-12-25
IPC分类号： C21D9/46 , C22C38/60 , C22C38/32 , C22C38/00 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C21D8/02 , C22C38/22
CPC分类号： C21D9/46 , B21B3/00 , B22D11/1206 , B22D11/1213 , C21D1/26 , C21D6/00 , C21D8/0226 , C21D8/0263 , C21D2211/003 , C21D2211/004 , C21D2211/005 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/22 , C22C38/32 , C22C38/60 , Y02P10/212
摘要： A high-carbon hot rolled steel sheet with excellent hardenability and small in-plane anisotropy, and a method for manufacturing the steel sheet are provided. The steel sheet has a chemical composition including, by mass %, C: 0.20 to 0.48%, Si: not more than 0.1%, Mn: not more than 0.5%, P: not more than 0.03%, S: not more than 0.01%, sol. Al: not more than 0.10%, N: not more than 0.005% and B: 0.0005 to 0.0050%, the balance including Fe and inevitable impurities. The steel sheet includes a microstructure containing ferrite and cementite. The cementite has an average grain size of not more than 1.0 μm. The steel sheet has an in-plane anisotropy of r value, Δr, of not more than 0.1 in absolute value.
摘要翻译： 提供了具有优异的淬透性和小的面内各向异性的高碳热轧钢板，以及钢板的制造方法。 该钢板具有以质量％计含有C：0.20〜0.48％，Si：0.1％以下，Mn：0.5％以下，P：0.03％以下，S：0.01以下的化学成分 ％，sol。 Al：不大于0.10％，N：不大于0.005％，B：0.0005至0.0050％，余量包括Fe和不可避免的杂质。 钢板包括含有铁素体和渗碳体的微结构。 渗碳体的平均粒径不大于1.0μm。 该钢板的r值的面内各向异性＆Dgr; r绝对值不大于0.1。
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