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1.发明申请METHOD FOR PRODUCING LOW YIELD STRENGTH COLD ROLLED STEEL SHEET EXCELLENT IN UNIFORMITY 审中-公开生产低合金强度冷轧钢板的优良方法公开(公告)号：US20100326572A1
公开(公告)日：2010-12-30
申请号：US12668057
申请日：2008-07-10
IPC分类号： C21D8/02
CPC分类号： C22C38/18 , C21D1/185 , C21D1/26 , C21D8/0247 , C21D8/0447 , C21D9/46 , C21D9/48 , C21D2211/004 , C22C38/04
摘要： A method produces a high-strength cold-rolled steel sheet includes hot-rolling and cold-rolling steel having a composition which contains, by % by mass, over 0.01% to less than 0.08% of C, 0.2% or less of Si, 0.8% to less than 1.7% of Mn, 0.03% or less of P, 0.02% or less of S, 0.3% or less of sol. Al, 0.01% or less of N, and over 0.4% to 2% of Cr, and which satisfies 1.9
摘要翻译： 一种制造高强度冷轧钢板的方法包括热轧和冷轧钢，其组成按质量％计含有C：0.01％以上且小于0.08％，Si：0.2％以下， 0.8％〜小于1.7％的Mn，0.03％以下的P，0.02％以下的S，0.3％以下的溶胶。 Al，0.01％以下的N和超过0.4％〜2％的Cr，其满足1.9 <[Mneq] 3和0.34＆nlE; [％Cr] / [％Mn]，余量由铁和 不可避免的杂质; 在680℃至740℃的温度范围内以小于3℃/秒的平均加热速率进行加热。 在超过740℃至小于820℃的退火温度下进行退火; 在退火温度为650℃的温度范围内以2〜30℃/秒的平均冷却速度进行冷却。 在650℃〜Tc℃的温度范围内以10℃/秒以上的平均冷却速度进行冷却。
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公开(公告)号：US20100132850A1
公开(公告)日：2010-06-03
申请号：US12667876
申请日：2008-07-10
CPC分类号： C23C2/02 , B32B15/013 , C21D8/0473 , C21D9/48 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C21D2211/009 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , C23C2/06 , C23C2/28
摘要： A high-strength hot-dip galvanized steel sheet that even on the premise of ordinary CGL heat cycle, has a low yield stress and excels in resistance to natural aging and baking hardenability without reliance on the use of expensive Mo; and a process for producing the same. The constituent composition thereof comprises 0.01 to less than 0.08% C, 0.2% or less Si, more than 1.0 to 1.8% Mn, 0.10% or less P, 0.03% or less S, 0.1% or less Al, 0.008% or less N and more than 0.5% Cr so that the relationship 1.95≦Mn(mass %)+1.3Cr(mass %)≦2.8 is satisfied and comprising the balance iron and unavoidable impurities. The structure thereof has a ferrite phase and a martensite phase of 2 to 15% area ratio, and the cumulative area ratio of pearlite phase and/or bainite phase is 1.0% or less. In the production of this hot-dip galvanized steel sheet, the temperature and cooling rate are controlled during the annealing/plating operation subsequent to cold rolling.
摘要翻译： 即使在普通CGL热循环的前提下，高强度热镀锌钢板也具有低屈服应力，耐天然老化和烘烤淬透性优异，而不依赖于使用昂贵的Mo; 及其制造方法。 其构成组成包括0.01至小于0.08％的C，0.2％或更少的Si，大于1.0至1.8％的Mn，0.10％或更少的P，0.03％以下的S，0.1％以下的Al，0.008％以下的N 和大于0.5％的Cr，使得满足关系1.95＆nlE; Mn（质量％）+ 1.3Cr（质量％）＆nlE; 2.8，并且包括余量的铁和不可避免的杂质。 其结构具有铁素体相和面积比为2〜15％的马氏体相，并且珠光体相和/或贝氏体相的累积面积比为1.0％以下。 在该热镀锌钢板的制造中，在冷轧后的退火/电镀操作中控制温度和冷却速度。
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3.发明申请公开(公告)号：US20100330392A1
公开(公告)日：2010-12-30
申请号：US12667707
申请日：2008-07-10
CPC分类号： C23C2/02 , B32B15/013 , C21D8/0247 , C21D9/46 , C21D2211/005 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/18 , C22C38/22 , C22C38/24 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/42 , C22C38/48 , C23C2/06 , C23C2/28 , Y10T428/12799
摘要： A high-strength galvanized steel sheet has a steel composition which contains, by % by mass, 0.01 to 0.12% of C, 0.2% or less of Si, less than 2% of Mn, 0.04% or less of P, 0.02% or less of S, 0.3% or less of sol. Al, 0.01% or less of N, and over 0.3% to 2% of Cr, and which satisfies 2.1≦[Mneq]≦3 and 0.24≦[% Cr]/[% Mn], the balance being composed of iron and inevitable impurities, and has a steel microstructures containing ferrite and a second phase.
摘要翻译： 高强度镀锌钢板具有以质量％计含有C：0.01〜0.12％，Si：0.2％以下，Mn：2％以下，P：0.04％以下，0.02％以下 较少的S，0.3％以下的溶胶。 Al，0.01％以下的N和0.3〜2％的Cr，满足2.1＆nlE; [Mneq]＆nlE; 3和0.24＆nlE; [％Cr] / [％Mn]，余量由 铁和不可避免的杂质，并且具有含有铁素体和第二相的钢微结构。
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公开(公告)号：US20090139611A1
公开(公告)日：2009-06-04
申请号：US12084173
申请日：2006-12-25
CPC分类号： C21D9/46 , C21D8/0205 , C21D2211/005 , C22C38/001 , C22C38/02 , C22C38/06 , C22C38/38 , C23C2/02 , C23C2/28
摘要： A galvanized steel sheet excellent in strength-ductility balance and bake-hardenability as well as a method for producing the same are provided. The chemical components thereof include C, Si, Mn, P, S, Al, N and Cr at content ratios of 0.005 to 0.04%, 1.5% or lower, 1.0 to 2.0%, 0.10% or lower, 0.03% or lower, 0.01 to 0.1%, less than 0.008% and 0.2 to 1.0%, respectively, with Mn (mass %)+1.29Cr (mass %) being in the range of 2.1 to 2.8, and further include iron and unavoidable impurities as the balance. The structure thereof consists of a ferrite phase and a martensite phase with a volume fraction being at least 3.0% and less than 10%, the average particle diameter of the ferrite is larger than 6 μm and not more than 15 μm, and 90% or more of the martensite phase exists in a ferrite grain boundary. In addition, in the production process of such a galvanized steel sheet, a steel sheet obtained in a cold rolling step is annealed at a temperature being at least the Ac1 point and not more than the Ac3 point.
摘要翻译： 提供强度 - 延展性平衡和烘烤硬化性优异的镀锌钢板及其制造方法。 其化学成分包括C：Si，Mn，P，S，Al，N和Cr，含量比例为0.005〜0.04％，1.5％以下，1.0〜2.0％，0.10％以下，0.03％以下，0.01 至0.1％，小于0.008％和0.2〜1.0％，Mn（质量％）+ 1.29Cr（质量％）在2.1〜2.8的范围内，还包含铁和不可避免的杂质作为平衡。 其结构由铁素体相和体积分率为3.0％以上且小于10％的马氏体相组成，铁素体的平均粒径大于6μm，15μm以下且90μm以下， 更多的马氏体相存在于铁素体晶界中。 另外，在这样的镀锌钢板的制造工序中，在冷轧工序中得到的钢板在至少Ac1点且不大于Ac3点的温度下退火。
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公开(公告)号：US20110192504A1
公开(公告)日：2011-08-11
申请号：US12927331
申请日：2010-11-12
IPC分类号： C21D8/02
CPC分类号： C21D9/46 , C21D8/0205 , C21D2211/005 , C22C38/001 , C22C38/02 , C22C38/06 , C22C38/38 , C23C2/02 , C23C2/28
摘要： A method for producing a galvanized steel sheet including (a) melting a steel having a steel composition comprising 0.005 to 0.04 mass % C, 1.5 mass % or lower Si, 1.0 to 2.0 mass % Mn, 0.10 mass % or lower P, 0.03 mass % or lower S, 0.01 to 0.1 mass % Al, less than 0.008 mass % N and 0.2 to 1.0 mass % Cr, wherein Mn (mass %)+1.29 Cr (mass %) is 2.1 to 2.8, and the balance being iron and unavoidable impurities, (b) hot rolling and cold rolling the steel from step (a) to provide a steel sheet, and (c) annealing the steel sheet from step (c) at an annealing temperature of at least the Ac1 point and not more than the Ac3 point, wherein the galvanized steel sheet has a structure which includes a ferrite phase and a martensite phase with a volume fraction being at least 3.0% and less than 10%, the average particle diameter of the ferrite is larger than 6 μm and not more than 15 μm, and 90% or more of the martensite phase exists in a ferrite grain boundary.
摘要翻译： 一种镀锌钢板的制造方法，其特征在于，具有（a）将钢组成为含有0.005〜0.04质量％的C，1.5质量％以下的Si，1.0〜2.0质量％的Mn，0.10质量％以下的P，0.03质量％ ％以下S，0.01〜0.1质量％Al，小于0.008质量％N和0.2〜1.0质量％Cr，其中，Mn（质量％）+ 1.29Cr（质量％）为2.1〜2.8，余量为铁和 不可避免的杂质，（b）对步骤（a）中的钢进行热轧和冷轧以提供钢板，（c）在至少Ac1点的退火温度下退火步骤（c）的钢板，而不是更多 其中镀锌钢板具有铁素体相和马氏体相的结构，其体积分数为3.0％以上且小于10％，铁素体的平均粒径大于6μm， 不大于15μm，在铁素体晶界中存在90％以上的马氏体相。
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6.发明授权公开(公告)号：US09452792B2
公开(公告)日：2016-09-27
申请号：US14116847
申请日：2012-04-23
申请人： Shusaku Takagi , Kaneharu Okuda , Yoshikiyo Tamai , Takeshi Fujita , Yoshitaka Okitsu , Tadashi Naito , Naoki Takaki , Tomoaki Sugiura
发明人： Shusaku Takagi , Kaneharu Okuda , Yoshikiyo Tamai , Takeshi Fujita , Yoshitaka Okitsu , Tadashi Naito , Naoki Takaki , Tomoaki Sugiura
IPC分类号： C22C38/04 , C22C38/12 , C22C38/06 , C21D7/00 , B62D29/00 , C21D9/00 , C22C38/00 , C22C38/02 , B21D53/88 , C21D9/46
CPC分类号： B62D29/007 , B21D53/88 , C21D9/0068 , C21D9/46 , C21D2211/001 , C21D2211/005 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , Y10T29/49622
摘要： A vehicle collision energy absorbing member is excellent in collision energy absorbing performance in the axial direction upon collision. The vehicle collision energy absorbing member is formed of a high strength thin steel sheet having TS of at least 980 MPa and having an n-value and a limit bending radius Rc satisfying the following Formula: Rc/t≦1.31×ln(n)+5.21.
摘要翻译： 车辆碰撞能量吸收构件在碰撞时轴向碰撞能量吸收性能优异。 车辆碰撞能量吸收部件由具有至少980MPa的TS且具有满足下式的n值和极限弯曲半径Rc的高强度薄钢板形成：Rc /t≤1.31×ln（n）+ 5.21。
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公开(公告)号：US07909950B2
公开(公告)日：2011-03-22
申请号：US11919964
申请日：2006-09-19
申请人： Hideyuki Kimura , Takeshi Fujita , Nobuyuki Nakamura , Satoshi Ueoka , Naoya Aoki , Kenichi Mitsuzuka
发明人： Hideyuki Kimura , Takeshi Fujita , Nobuyuki Nakamura , Satoshi Ueoka , Naoya Aoki , Kenichi Mitsuzuka
IPC分类号： C21D8/00
CPC分类号： C22C38/02 , C21D1/32 , C21D6/008 , C21D8/0263 , C21D9/46 , C22C38/04 , C22C38/12 , C22C38/14 , C22C38/18 , C22C38/32
摘要： The present invention provides an ultra soft high carbon hot-rolled steel sheet. The ultra soft high carbon hot-rolled steel sheet contains 0.2% to 0.7% of C, 0.01% to 1.0% of Si, 0.1% to 1.0% of Mn, 0.03% or less of P, 0.035% or less of S, 0.08% or less of Al, 0.01% or less of N, and the balance being Fe and incidental impurities and further contains 0.0010% to 0.0050% of B and 0.05% to 0.30% of Cr in some cases. In the texture of the steel sheet, an average ferrite grain diameter is 20 μm or more, a volume ratio of ferrite grains having a grain diameter of 10 μm or more is 80% or more, and an average carbide grain diameter is in the range of 0.10 to less than 2.0 μm. In addition, the steel sheet is manufactured by the steps, after rough rolling, performing finish rolling at a reduction ratio of 10% or more and at a finish temperature of (Ar3−20° C.) or more in a final pass, then performing first cooling within 2 seconds after the finish rolling to a cooling stop temperature of 600° C. or less at a cooling rate of more than 120° C./sec, then performing second cooling so that the steel thus processed is held at 600° C. or less, then performing coiling at 580° C. or less, followed by pickling, and then performing spheroidizing annealing at a temperature in the range of 680° C. to the Ac1 transformation point.
摘要翻译： 本发明提供一种超软质高碳热轧钢板。 超软质高碳热轧钢板含有C：0.2〜0.7％，Si：0.01〜1.0％，Mn：0.1〜1.0％，P：0.03％以下，S：0.035％以下，0.08以下 Al以下，Al：0.01％以下，余量为Fe和附带杂质，在某些情况下还含有0.0010〜0.0050％的B和0.05〜0.30％的Cr。 在钢板的织构中，平均铁素体晶粒直径为20μm以上，粒径为10μm以上的铁素体晶粒的体积比为80％以上，平均碳化物粒径为 为0.10〜小于2.0μm。 另外，在粗轧后，在最终通过时以10％以上的还原率和最终温度（Ar 3〜20℃）以上的精轧进行精轧，然后， 在精轧后2秒内进行冷却至冷却停止温度600℃以下，冷却速度大于120℃/秒，然后进行第二次冷却，使被处理钢被保持在600℃ ℃以下，然后在580℃以下进行卷取，然后酸洗，然后在680℃的温度下进行Ac1相变点的球化退火。
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8.发明授权公开(公告)号：US08048237B2
公开(公告)日：2011-11-01
申请号：US12294639
申请日：2007-02-26
申请人： Hideyuki Kimura , Takeshi Fujita , Nobuyuki Nakamura , Naoya Aoki , Masato Sasaki , Satoshi Ueoka , Shunji Iizuka
发明人： Hideyuki Kimura , Takeshi Fujita , Nobuyuki Nakamura , Naoya Aoki , Masato Sasaki , Satoshi Ueoka , Shunji Iizuka
摘要： An ultra soft high carbon hot-rolled steel sheet has excellent workability. The steel sheet is a high carbon hot-rolled steel sheet containing 0.2 to 0.7% C, and has a structure in which mean grain size of ferrite is 20 μm or larger, the volume percentage of ferrite grains having 10 μm or smaller size is 20% or less, mean diameter of carbide is in a range from 0.10 μm to smaller than 2.0 μm, the percentage of carbide grains having 5 or more of aspect ratio is 15% or less, and the contact ratio of carbide is 20% or less.
摘要翻译： 超柔软的高碳热轧钢板的加工性优异。 该钢板是含有0.2〜0.7％C的高碳热轧钢板，其铁素体的平均粒径为20μm以上的结构，具有10μm以下的铁素体晶粒的体积百分比为20 ％以下，碳化物的平均直径为0.10μm以上且小于2.0μm，纵横比为5以上的碳化物的比例为15％以下，碳化物的接触率为20％以下 。
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9.发明申请公开(公告)号：US20100282376A1
公开(公告)日：2010-11-11
申请号：US12294639
申请日：2007-02-26
申请人： Hideyuki Kimura , Takeshi Fujita , Nobuyuki Nakamura , Naoya Aoki , Masato Sasaki , Satoshi Ueoka , Shunji Iizuka
发明人： Hideyuki Kimura , Takeshi Fujita , Nobuyuki Nakamura , Naoya Aoki , Masato Sasaki , Satoshi Ueoka , Shunji Iizuka
摘要： An ultra soft high carbon hot-rolled steel sheet has excellent workability. The steel sheet is a high carbon hot-rolled steel sheet containing 0.2 to 0.7% C, and has a structure in which mean grain size of ferrite is 20 μm or larger, the volume percentage of ferrite grains having 10 μm or smaller size is 20% or less, mean diameter of carbide is in a range from 0.10 μm to smaller than 2.0 μm, the percentage of carbide grains having 5 or more of aspect ratio is 15% or less, and the contact ratio of carbide is 20% or less.
摘要翻译： 超柔软的高碳热轧钢板的加工性优异。 该钢板是含有0.2〜0.7％C的高碳热轧钢板，其铁素体的平均粒径为20μm以上的结构，具有10μm以下的铁素体晶粒的体积百分比为20 ％以下，碳化物的平均直径为0.10μm以上且小于2.0μm，纵横比为5以上的碳化物的比例为15％以下，碳化物的接触率为20％以下 。
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10.发明申请公开(公告)号：US20090065106A1
公开(公告)日：2009-03-12
申请号：US11919964
申请日：2006-09-19
申请人： Hideyuki Kimura , Takeshi Fujita , Nobuyuki Nakamura , Satoshi Ueoka , Naoya Aoki , Kenichi Mitsuzuka
发明人： Hideyuki Kimura , Takeshi Fujita , Nobuyuki Nakamura , Satoshi Ueoka , Naoya Aoki , Kenichi Mitsuzuka
CPC分类号： C22C38/02 , C21D1/32 , C21D6/008 , C21D8/0263 , C21D9/46 , C22C38/04 , C22C38/12 , C22C38/14 , C22C38/18 , C22C38/32
摘要： The present invention provides an ultra soft high carbon hot-rolled steel sheet. The ultra soft high carbon hot-rolled steel sheet contains 0.2% to 0.7% of C, 0.01% to 1.0% of Si, 0.1% to 1.0% of Mn, 0.03% or less of P, 0.035% or less of S, 0.08% or less of Al, 0.01% or less of N, and the balance being Fe and incidental impurities and further contains 0.0010% to 0.0050% of B and 0.05% to 0.30% of Cr in some cases. In the texture of the steel sheet, an average ferrite grain diameter is 20 μm or more, a volume ratio of ferrite grains having a grain diameter of 10 μm or more is 80% or more, and an average carbide grain diameter is in the range of 0.10 to less than 2.0 μm. In addition, the steel sheet is manufactured by the steps, after rough rolling, performing finish rolling at a reduction ratio of 10% or more and at a finish temperature of (Ar3−20° C.) or more in a final pass, then performing first cooling within 2 seconds after the finish rolling to a cooling stop temperature of 600° C. or less at a cooling rate of more than 120° C./sec, then performing second cooling so that the steel thus processed is held at 600° C. or less, then performing coiling at 580° C. or less, followed by pickling, and then performing spheroidizing annealing at a temperature in the range of 680° C. to the Ac1 transformation point.
摘要翻译： 本发明提供一种超软质高碳热轧钢板。 超软质高碳热轧钢板含有C：0.2〜0.7％，Si：0.01〜1.0％，Mn：0.1〜1.0％，P：0.03％以下，S：0.035％以下，0.08以下 Al以下，Al：0.01％以下，余量为Fe和附带杂质，在某些情况下还含有0.0010〜0.0050％的B和0.05〜0.30％的Cr。 在钢板的织构中，平均铁素体晶粒直径为20μm以上，粒径为10μm以上的铁素体晶粒的体积比为80％以上，平均碳化物粒径为 为0.10〜小于2.0μm。 另外，在粗轧后，在最终通过时以10％以上的还原率和最终温度（Ar 3〜20℃）以上的精轧进行精轧，然后， 在精轧后2秒内进行冷却至冷却停止温度600℃以下，冷却速度大于120℃/秒，然后进行第二次冷却，使被处理钢被保持在600℃ ℃以下，然后在580℃以下进行卷取，然后酸洗，然后在680℃的温度下进行Ac1相变点的球化退火。
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