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1. 发明专利

JP2009001909A Manufacturing method of high-strength cold-rolled steel sheet 有权
标题翻译：高强度冷轧钢板的制造方法
公开(公告)号：JP2009001909A
公开(公告)日：2009-01-08
申请号：JP2008198245
申请日：2008-07-31
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： IWASAKI MASAMI , TAKAGI SHUSAKU , KAWABE HIDENAO , MEGA TETSUYA , SAKATA TAKASHI
IPC分类号： C21D9/46 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method of a high-strength cold-rolled steel sheet achieving a tensile strength of 980 MPa or higher and superior in strength-ductility balance and workability such as stretch-flange-workability.
SOLUTION: The method includes preparing a billet containing 0.05-0.20 mass% of C, 0.2-0.8 mass% of Si, 2.0-4.0 mass% of Mn, 0.02 mass% or less of P, 0.0030 mass% or less of S, 0.05 mass% or less of Al, 0.10-1.2 mass% of Ni, and 0.005-0.030 mass% of Ti, hot-rolling and cold-rolling the billet to a plate, applying a continuous annealing at the temperature range of (Ac
3 -50) to (Ac
3 +50)°C, and then cooling the plate to the temperature range of 350-550°C at a cooling speed of 10°C/s or higher and retaining it for 15 sec or longer in this temperature range.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种达到980MPa或更高的拉伸强度并且强度 - 延展性平衡和拉伸凸缘加工性等可加工性优异的高强度冷轧钢板的制造方法。解决方案：该方法包括制备含有0.05-0.20质量％的C，0.2-0.8质量％的Si，2.0-4.0质量％的Mn，0.02质量％以下的P，0.0030质量％以下的钢坯 S，0.05质量％以下的Al，0.10〜1.2质量％的Ni和0.005〜0.030质量％的Ti，将钢坯热轧，冷轧成板，在（a）的温度范围进行连续退火，（Ac 3 -50）℃，然后以10的冷却速度将板冷却至350-550℃的温度范围 ℃或更高，并在该温度范围内保持15秒或更长时间。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JP2007262553A Hot dip galvanized steel sheet and its production method 有权
标题翻译：热镀锌钢板及其生产方法
公开(公告)号：JP2007262553A
公开(公告)日：2007-10-11
申请号：JP2006093002
申请日：2006-03-30
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： TAKAGI SHUSAKU , MATSUDA HIROSHI , NAGATAKI YASUNOBU , MAKIISHI NORIKO , KONO TAKASHI , SUZUKI YOSHITSUGU
IPC分类号： C22C38/00 , C21D9/46 , C22C38/38 , C22C38/58 , C23C2/06
CPC分类号： C22C38/06 , B32B15/013 , C21D9/46 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/38 , C23C2/06
摘要： PROBLEM TO BE SOLVED: To provide a hot dip galvanized steel sheet which has a strength satisfying a tensile strength (TS) of ≥590 MPa and a fatigue strength (FL) of ≥200 MPa in a state of having a blanked fracture.
SOLUTION: The hot dip galvanized steel sheet has a composition comprising, by mass, 0.05 to 0.30% C, 0.8 to 3.00% Mn, 0.003 to 0.100% P, ≤0.010% S, 0.10 to 2.50% Al, 0.03 to 0.50% Cr and ≤0.007% N, and the balance substantially Fe with inevitable impurities, has a structure comprising a ferrite phase, a retained austenite phase and a low temperature transformed phase, and in which the fraction of the ferrite phase is ≤97% by volume ratio, and also, AlN is precipitated in a region to 1 μm from the steel surface except a plated layer, and also has the characteristics of a tensile strength (TS) satisfying ≥590 MPa and a fatigue strength (FL) satisfying ≥200 MPa in a state of having a blanked fracture.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有满足拉伸强度（TS）≥590MPa的强度和在具有冲裁断裂的状态下的疲劳强度（FL）≥200MPa的热浸镀锌钢板。热浸镀锌钢板的组成为，含有0.05〜0.30％的C，0.8〜3.00％的Mn，0.003〜0.100％的P，≤0.010％的S，0.10〜2.50％的Al，0.03〜 0.50％Cr和≤0.007％N，余量基本为Fe，不可避免的杂质含有铁素体相，残余奥氏体相和低温转化相，其中铁素体相的比例≤97％体积比，AlN除了电镀层以外的钢表面析出1μm以上，并且还具有满足≥590MPa的拉伸强度（TS）和满足≥590MPa的疲劳强度（FL）的特性，在具有冲裁断裂的状态下为200MPa。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2007009320A High-strength steel sheet plated with zinc by hot dipping with excellent formability and process for producing the same 有权
标题翻译：通过热浸镀锌的高强度钢板，具有优异的可制造性和生产它的工艺
公开(公告)号：JP2007009320A
公开(公告)日：2007-01-18
申请号：JP2006001477
申请日：2006-01-06
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MATSUDA HIROSHI , NAKAGAITO TATSUYA , FUTATSUKA TAKAYUKI , TAKAGI SHUSAKU , NAGATAKI YASUNOBU
IPC分类号： C22C38/00 , C21D9/46 , C22C38/60 , C23C2/06
CPC分类号： C21D9/46 , B32B15/013 , C21D2211/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/40 , C23C2/02 , C23C2/06 , C23C2/28 , C23F17/00
摘要： PROBLEM TO BE SOLVED: To provide a high-strength steel sheet plated with zinc by hot dipping which has excellent processability, which can be produced using a production line including zinc plating by hot dipping and in which a sufficient austempering time after annealing is not secured, without necessitating a special structural control as a pretreatment.
SOLUTION: The high-strength steel sheet plated with zinc by hot dipping contains 0.05 to 0.3 mass% carbon, up to 1.4 mass% (including 0 mass%) silicon, 0.08 to 3 mass% manganese, 0.003 to 0.1 mass% phosphorous, up to 0.07 mass% sulfur, 0.1 to 2.5 mass% aluminum, 0.1 to 0.5 mass% chromium, and up to 0.007 mass% nitrogen, provided that silicon+aluminum≥0.5 mass%, with the remainder consisting of iron and unavoidable impurities. The steel sheet has a volume content of residual austenite of 3% or higher, and residual austenite grains have an average aspect ratio of 2.5 or lower.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种通过热浸镀锌的高强度钢板，其具有优异的加工性，其可以使用包括通过热浸镀锌的生产线生产并且在退火后具有足够的奥氏体回火时间没有固定，不需要特殊的结构控制作为预处理。解决方案：通过热浸镀锌的高强度钢板含有0.05〜0.3质量％的碳，至多1.4质量％（包括0质量％）的硅，0.08〜3质量％的锰，0.003〜0.1质量％磷，至多0.07质量％的硫，0.1至2.5质量％的铝，0.1至0.5质量％的铬和至多0.007质量％的氮，条件是硅+铝≥0.5质量％，其余由铁和不可避免的杂质组成。钢板的残留奥氏体的体积含量为3％以上，残留奥氏体晶粒的平均纵横比为2.5以下。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2006052458A High tensile strength cold-rolled steel sheet and its production method 有权
标题翻译：高强度冷轧钢板及其生产方法
公开(公告)号：JP2006052458A
公开(公告)日：2006-02-23
申请号：JP2004245389
申请日：2004-08-25
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： TAKAGI SHUSAKU , NISHIYAMA NAOKI , SHIMIZU TETSUO
IPC分类号： C22C38/00 , C21D9/46 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high tensile strength cold-rolled steel sheet having a good strength-elongation balance and excellent impact resistance characteristics at deformation at a strain rate of about 10 s
-1 .
SOLUTION: The steel sheet has a chemical composition consisting of, by mass, 0.04 to 0.13% C, 0.3 to 1.2% Si, 1.0 to 3.5% Mn, ≤0.04% P, ≤0.01% S, ≤0.07% Al and the balance Fe with inevitable impurities. Moreover, the steel sheet has a structure in which ferrite fraction and martensite fraction are ≥50% and ≥10%, respectively, and, with respect to a martensite phase, the ratio of the phase interval in the rolling direction to that in the sheet thickness direction ranges from 0.85 to 1.5. Further, the nano hardness of the martensite phase is made to ≥8 GPa.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种具有良好的强度 - 伸长率平衡的高抗拉强度冷轧钢板，在应变速率约为10s -1时在变形时具有优异的抗冲击特性。。钢板具有以质量计含有0.04〜0.13％C，0.3〜1.2％Si，1.0〜3.5％Mn，≤0.04％P，≤0.01％S，≤0.07％Al的化学成分余量为Fe与不可避免的杂质。此外，钢板具有铁素体分率和马氏体分数分别为≥50％和≥10％的结构，并且相对于马氏体相，轧制方向上的相位间隔与片材的相位间隔的比例厚度方向为0.85〜1.5。此外，马氏体相的纳米硬度为≥8GPa。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2004084074A Hot rolled sheet steel having excellent impact resistance 有权
标题翻译：具有优异抗冲击性的热轧钢板
公开(公告)号：JP2004084074A
公开(公告)日：2004-03-18
申请号：JP2003408357
申请日：2003-12-08
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： TAKAGI SHUSAKU , MIURA KAZUYA , KATO TOSHIYUKI
IPC分类号： C22C38/00 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide a hot rolled steel sheet for an automobile which has excellent impact resisting strength at a high strain rate, and is easily subjected to press forming.
SOLUTION: The hot rolled steel sheet has a componential composition comprising, by weight, 0.05 to 0.20% C, 0.01 to 1.50% Si, 0.5 to 3.0% Mn, and ≤0.010% S, also comprising one or more kinds of metals selected from 0.03 to 0.15% P, 0.5 to 2.0% Cr, and 0.1 to 1.0% Mo, and further comprising one or two kinds of metals selected from 0.03 to 1.0% Ti and 0.01 to 0.2% Nb, and the balance Fe with inevitable impurities, and has a two phase structure consisting of martensite having a mean particle diameter of ≤3 μm and ferrite having a mean particle diameter of ≤5 μm, and in which the volume ratio of the martensite is 5 to 30%.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种在高应变率下具有优异的抗冲击强度的汽车用热轧钢板，并且容易进行冲压成形。解决方案：热轧钢板具有重量含有0.05〜0.20％的C，0.01〜1.50％的Si，0.5〜3.0％的Mn和≤0.010％的S的成分组合物，其还包含一种或多种金属选自0.03〜0.15％的P，0.5〜2.0％的Cr和0.1〜1.0％的Mo，还含有选自0.03〜1.0％Ti和0.01〜0.2％Nb的一种或两种金属，余量为Fe 不可避免的杂质，具有由平均粒径≤3μm的马氏体和平均粒径≤5μm的铁素体构成的两相结构，马氏体的体积比为5〜30％。版权所有（C）2004，JPO

6. 发明专利

JP2008231480A High-strength cold-rolled steel sheet, and method for producing high-strength cold-rolled steel sheet 有权
标题翻译：高强度冷轧钢板，以及生产高强度冷轧钢板的方法
公开(公告)号：JP2008231480A
公开(公告)日：2008-10-02
申请号：JP2007070677
申请日：2007-03-19
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： NAKAGAITO TATSUYA , MATSUOKA SAIJI , MATSUDA HIROSHI , TAKAGI SHUSAKU
IPC分类号： C22C38/00 , C21D9/46 , C22C38/14 , C22C38/38 , C23C2/06
摘要： PROBLEM TO BE SOLVED: To provide a high-strength cold-rolled steel sheet which has large absorbing energy in a low strain zone even without introducing the strain by means of a press machining and is excellent in collision resistant characteristics with respect to the cold-rolled steel sheet used for automobile, house electric appliances, mechanical structure or the like, and to provide a method for producing the therefor, regarding to the high-strength cold-rolled steel sheet. SOLUTION: This steel sheet has: the steel composition containing, by mass%, 0.05-0.25% C, ≤2.0% Si, 1.0-3.0% Mn, ≤0.10% P, ≤0.02% S, 0.01-2% S, 0.01-2% Al and 0.01-0.2% total of one or more kinds among Ti, Nb and V and the balance Fe with inevitable impurities; as the steel micro-structure, a low temperature transformation phase composed of one or more kinds among ferrite, martensite, bainite and residual γ, and 10-50 vol% the volume ratio of this low temperature transformation phase, ≤2 μm the average crystal grain diameter of this low temperature transformation phase, and ≤2 μm the average distance between the approached low temperature transformation phases. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种在低应变区具有大的吸收能量的高强度冷轧钢板，即使没有通过冲压加工引入应变，并且相对于用于汽车，家用电器，机械结构等的冷轧钢板，并且提供一种用于制造高强度冷轧钢板的方法。该钢板具有以质量％计含有0.05-0.25％C，≤2.0％Si，1.0-3.0％Mn，≤0.10％P，≤0.02％S，0.01-2％ S，0.01-2％Al和Ti，Nb和V中的一种或多种的0.01-0.2％，余量为Fe和不可避免的杂质; 作为钢微结构，由铁素体，马氏体，贝氏体和残留γ中的一种以上组成的低温相变相，该低温相变相的体积比为10〜50体积％，平均结晶为≤2μm 该低温相变相的晶粒直径，接近的低温相变阶段之间的平均距离≤2μm。版权所有（C）2009，JPO＆INPIT

7. 发明专利

JP2005314796A High strength hot rolled steel sheet having excellent elongation property, stretch flange property and tensile fatigue property, and its production method 有权
标题翻译：具有优良延伸性，拉伸法兰特性和拉伸疲劳性能的高强度热轧钢板及其生产方法
公开(公告)号：JP2005314796A
公开(公告)日：2005-11-10
申请号：JP2005019872
申请日：2005-01-27
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： NAKAGAWA KOICHI , TAKAGI SHUSAKU , KARIYA FUSAAKI , SHIMIZU TETSUO
IPC分类号： C21D9/46 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high strength hot rolled steel sheet having a high strength satisfying TS≥780 MPa, and also having excellent elongation properties, stretch flange properties and tensile fatigue properties.
SOLUTION: The steel sheet contains, by mass, 0.03 to 0.2% Ti and 0.03 to 0.5% Mo as essential components, and has a steel structure, by occupancy ratio to the whole structure, 40 to 96% ferrite, 4 to 15% retained austenite, and the balance substantially bainite, and in which precipitates composed of Ti, Mo and C are precipitated into ferrite, the average diameter of the precipitates is controlled to ≤20 nm, and the average spacing between the precipitates is controlled to ≤60 nm.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种具有高TS≥780MPa的高强度的高强度热轧钢板，并且还具有优异的伸长性能，拉伸凸缘性能和拉伸疲劳性能。钢板以质量计含有0.03〜0.2％的Ti和0.03〜0.5％的Mo作为必须成分，具有钢结构，占整个结构的占空比，40〜96％的铁素体，4〜 15％的残余奥氏体，余量基本上为贝氏体，其中由Ti，Mo和C组成的析出物析出为铁素体，析出物的平均直径控制在≤20nm，将析出物的平均间隔控制在 ≤60nm。版权所有（C）2006，JPO＆NCIPI

8. 发明专利

JP2004339606A High strength hot rolled steel plate and manufacturing method 有权
公开(公告)号：JP2004339606A
公开(公告)日：2004-12-02
申请号：JP2004124154
申请日：2004-04-20
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： KARIYA FUSAAKI , TAKAGI SHUSAKU , SHIMIZU TETSUO , MEGA TETSUYA , SAKATA TAKASHI , TAKAHASHI HIROSHI
IPC分类号： C21D9/46 , C21D8/02 , C22C38/00 , C22C38/14
CPC分类号： C22C38/02 , C21D8/0226 , C21D2211/002 , C21D2211/004 , C21D2211/005 , C21D2211/008 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To provide a high strength hot rolled steel plate having ≥780 MPa tensile strength, superior elongation and excellent stretch-flange formability of ≥60% bore expandability.
SOLUTION: The steel plate has a chemical composition consisting of 0.04 to 0.15% C, ≤1.5% Si, 0.5 to 1.6% Mn, ≤0.04% P, ≤0.005% S, ≤0.04% Al, 0.03 to 0.15% Ti, 0.03 to 0.5% Mo and the balance iron with inevitable impurities. Moreover, this steel plate has a structure consisting of ferrite containing precipitates, a secondary phase composed of bainite and/or martensite and another phase other than the above ferrite and secondary phase. Further, the above ferrite containing precipitates and the above another phase comprise 40 to 95% and ≤5% of the structure, respectively.
COPYRIGHT: (C)2005,JPO&NCIPI

9. 发明专利

JP2003277888A High strength steel sheet having excellent to prevent fatigue crack propagation property and production method thereof 审中-公开
标题翻译：高强度钢板，以防止疲劳裂纹扩展性能及其生产方法
公开(公告)号：JP2003277888A
公开(公告)日：2003-10-02
申请号：JP2002084670
申请日：2002-03-26
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： TAKAGI SHUSAKU , MEGA TETSUYA , SAKATA TAKASHI
IPC分类号： C21D9/46 , C22C38/00 , C22C38/12 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel sheet of common steel or low alloy steel, which has excellent fatigue crack propagation resistance, and to provide a production method thereof.
SOLUTION: A steel slab having a composition containing 0.02 to 0.5% C, 0.3 to 3.5% Mn, ≤0.02% Al, 0.05 to 3.0% Mo and 0.0050 to 0.040% N, or further containing one or more kinds of metals selected from 0.2 to 2.5% Si, 0.02 to 0.15% P, 0.1 to 1.5% Cr and 0.001 to 0.010% rare earth metals is subjected to finish rolling at an Ar
3 point or higher, and is thereafter cooled at a cooling rate of ≥30°C/s on the average till the subsequent coiling at 200 to 600°C. Alternatively, the hot rolled steel sheet having the composition is cold-rolled at a draft of ≥30%, and is thereafter heated to a temperature in a ferrite-austenite two phase region where the ferrite fraction reaches ≤10% or higher, and is held for ≥30 sec. Next, the steel sheet is cooled to a temperature of 300 to 600°C with a cooling rate of ≥10°C/s on the average, is held for ≥5 sec, and is subsequently cooled.
COPYRIGHT: (C)2004,JPO
摘要翻译：解决的问题：提供耐疲劳裂纹扩展性优异的普通钢或低合金钢的高强度钢板，并提供其制造方法。解决方案：具有含有0.02-0.5％C，0.3-3.5％Mn，≤0.02％Al，0.05-3.0％Mo和0.0050-0.040％N，或进一步含有一种或多种金属的组合物的钢坯选自0.2〜2.5％的Si，0.02〜0.15％的P，0.1〜1.5％的Cr和0.001〜0.010％的稀土类金属，在Ar 3 以上进行精轧，以≥30℃/ s的平均冷却速度冷却至200〜600℃下卷取。或者，将具有该组成的热轧钢板以≥30％的压下量进行冷轧，然后加热至铁素体部分达到≤10％以上的铁素体 - 奥氏体两相区域的温度，为持续≥30秒接着，将钢板平均冷却至≥10℃/ s的冷却速度为300〜600℃的温度，保持≥5秒，然后冷却。版权所有（C）2004，JPO

10. 发明专利

JP2008280577A High strength hot dip galvanized steel sheet having excellent formability 有权
标题翻译：高强度热镀锌钢板具有优异的可塑性
公开(公告)号：JP2008280577A
公开(公告)日：2008-11-20
申请号：JP2007125453
申请日：2007-05-10
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MATSUDA HIROSHI , FUTATSUKA TAKAYUKI , NAKAGAITO TATSUYA , TAKAGI SHUSAKU , MATSUOKA SAIJI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/60
CPC分类号： B32B15/013 , C22C38/02 , C22C38/04 , C22C38/06
摘要： PROBLEM TO BE SOLVED: To provide a high strength hot dip galvanized steel sheet having excellent ductility and stretch flangeability. SOLUTION: The high strength hot dip galvanized steel sheet has a steel composition comprising 0.04 to 0.13% C, 0.12 to 1.0% Si, 0.5 to 2.5% Mn, ≤0.1% P, ≤0.07% S, ≤1.0% Al and ≤0.007% N, and has a steel sheet structure having crystal grains where the area ratio of polygonal ferrite is ≥50%, other than the polygonal ferrite, the respective crystal grains are composed of a single phase of martensite, bainite or retained austenite, or a mixed phase thereof, the area ratio of he bainite is 15 to 48%, the total area ratio of the martensite and retained austenite is 2 to 30%, the area ratio of the retained austenite is 0 to 5%, (the area ratio of the martensite and retained austenite)/(the area ratio of the bainite)≤1/2, and further, the area ratio of the crystal grains composed of the martensite and/or retained austenite is 0 to 5%. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供具有优异的延展性和拉伸凸缘性的高强度热浸镀锌钢板。解决方案：高强度热浸镀锌钢板具有钢组成，其包括：C：0.04〜0.13％，Si：0.12〜1.0％，Mn：0.5〜2.5％，P：≤0.07％，S：≤1.0％的Al 和≤0.007％N，并且具有除了多边形铁素体之外，多边形铁素体的面积比为≥50％的晶粒的钢板结构，各晶粒由单相的马氏体，贝氏体或残余奥氏体组成或其混合相，贝氏体的面积比为15〜48％，马氏体和残留奥氏体的总面积比为2〜30％，残留奥氏体的面积比为0〜5％（（马氏体和残留奥氏体的面积比）/（贝氏体的面积比）≤1/ 2，此外，由马氏体和/或残留奥氏体组成的晶粒的面积比为0〜5％。版权所有（C）2009，JPO＆INPIT

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