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公开(公告)号：EP2698442B1
公开(公告)日：2018-05-30
申请号：EP12771896.3
申请日：2012-04-12
发明人： SUWA, Yoshihiro , NAKANO, Kazuaki , HAYASHI, Kunio , OKAMOTO, Riki , FUJITA, Nobuhiro , SANO, Kohichi
IPC分类号： C23C2/06 , B32B15/01 , C21D8/02 , C21D8/04 , C22C38/00 , C21D9/46 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C23C2/28 , C23C2/36 , C22C38/10
CPC分类号： C21D9/46 , B32B15/013 , C21D8/02 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0426 , C21D8/0436 , C21D8/0473 , C21D2201/05 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C21D2211/009 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/105 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/38 , C23C2/06 , C23C2/285 , C23C2/36 , Y10T428/12799
摘要： This high-strength cold-rolled steel sheet contains, in mass%, C: 0.02% to 0.20%; Si: 0.001% to 2.5%; Mn: 0.01% to 4.0%; P: 0.001% to 0.15%; S: 0.0005% to 0.03%; Al: 0.001 % to 2.0%; N: 0.0005% to 0.01%; and O: 0.0005% to 0.01%; in which Si + Al is limited to less than 1.0%, and a balance being composed of iron and inevitable impurities, in which an area ratio of bainite in a metal structure is 95% or more, at a sheet thickness center portion being a range of 5/8 to 3/8 in sheet thickness from the surface of the steel sheet, an average value of pole densities of the {100} to {223} orientation group is 4.0 or less, and a pole density of the {332} crystal orientation is 5.0 or less, and a mean volume diameter of crystal grains in the metal structure is 7 µm or less.
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公开(公告)号：EP3309273A1
公开(公告)日：2018-04-18
申请号：EP16807627.1
申请日：2016-06-10
发明人： SANO, Kohichi , HAGA, Jun , HAYASHI, Koutarou , KAWATA, Hiroyuki , OKAMOTO, Riki , UENISHI, Akihiro
CPC分类号： C21D9/46 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0247 , C21D8/0263 , C21D2211/001 , C21D2211/002 , C21D2211/008 , C22C18/00 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/32 , C22C38/42 , C22C38/50 , C22C38/58 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/28 , C23C2/40
摘要： This invention provides a galvannealed steel sheet that includes an alloyed hot-dip galvanized layer on a surface of a steel sheet. The chemical composition of the steel sheet contains, by mass%, C: 0.25 to 0.70%, Si: 0.25 to 2.50%, Mn: 1.00 to 5.00%, Al: 0.005 to 3.50%, P: 0.15% or less, S: 0.03% or less, N ≤ 0.02%, O ≤ 0.01%, and as needed contains one or more elements selected from Ti, Nb, V, Cr, Mo, Cu, Ni, B, Ca, REM, Mg, W, Zr, Sb, Sn, As, Te, Y, Hf and Co, with a balance being Fe and impurities. The steel micro-structure of the galvannealed steel sheet consists of, by vol.%, retained γ: 10.0 to 60.0%, high-temperature tempered martensite ≥ 5.0%, low-temperature tempered martensite ≥ 5.0%, fresh martensite ≤ 10.0%, α: 0 to 15.0%, P: 0 to 10.0%, with a balance being bainite. The total volume ratio of tempered martensite and bainite is 30.0% or more, the tensile strength is 1470 MPa or more, the product of tensile strength and uniform elongation is 13000 MPa% or more, and the product of tensile strength and local elongation is 5000 MPa% or more.
摘要翻译： 本发明提供在钢板表面具有合金化熔融镀锌层的合金化热镀锌钢板。 钢板的化学组成以质量％计含有C：0.25〜0.70％，Si：0.25〜2.50％，Mn：1.00〜5.00％，Al：0.005〜3.50％，P：0.15％以下，S： 0.03％以下，N≤0.02％，O≤0.01％，根据需要含有选自Ti，Nb，V，Cr，Mo，Cu，Ni，B，Ca，REM，Mg，W，Zr中的一种以上的元素 ，Sb，Sn，As，Te，Y，Hf和Co，余量为Fe和杂质。 合金化热浸镀锌钢板的钢组织由以体积％计，残留γ：10.0〜60.0％，高温回火马氏体≥5.0％，低温回火马氏体≥5.0％，新鲜马氏体≤10.0％ α：0〜15.0％，P：0〜10.0％，余量为贝氏体。 回火马氏体和贝氏体的总体积比为30.0％以上，拉伸强度为1470MPa以上，拉伸强度和均匀伸长率的乘积为13000MPa％以上，拉伸强度和局部伸长率的乘积为5000 MPa％以上。
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公开(公告)号：EP3495528A1
公开(公告)日：2019-06-12
申请号：EP17837115.9
申请日：2017-08-04
发明人： SANO, Kohichi , UNO, Makoto , NISHIYAMA, Ryoichi , YAMAGUCHI, Yuji , SUGIURA, Natsuko , NAKATA, Masahiro
摘要： A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 30 to 95%, and bainite: 5 to 70%. When a region that is surrounded by a grain boundary having a misorientation of 15° or more and has a circle-equivalent diameter of 0.3 µ m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. An average aspect ratio of ellipses equivalent to the crystal grains is 5 or less. An average distribution density of the total of Ti-based carbides and Nb-based carbides each having a grain size of 20 nm or more on ferrite grain boundaries is 10 carbides/ µ m or less.
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公开(公告)号：EP2698440B1
公开(公告)日：2018-05-30
申请号：EP12770870.9
申请日：2012-04-12
发明人： SUWA, Yoshihiro , NAKANO, Kazuaki , HAYASHI, Kunio , OKAMOTO, Riki , FUJITA, Nobuhiro , SANO, Kohichi
IPC分类号： C23C2/06 , C23C2/28 , C23C2/36 , B32B15/01 , C21D8/02 , C21D8/04 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/10
CPC分类号： C21D9/46 , B32B15/013 , C21D8/02 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0426 , C21D8/0436 , C21D8/0473 , C21D2201/05 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C21D2211/009 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/105 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/38 , C23C2/06 , C23C2/285 , C23C2/36 , Y10T428/12799
摘要： This high-strength cold-rolled steel sheet contains, in mass%, C: 0.02% to 0.20%; Si: 0.001% to 2.5%; Mn: 0.01% to 4.0%; P: 0.001% to 0.15%; S: 0.0005% to 0.03%; Al: 0.001 % to 2.0%; N: 0.0005% to 0.01%; and O: 0.0005% to 0.01%; in which Si + Al is limited to less than 1.0%, and a balance being composed of iron and inevitable impurities, in which an area ratio of bainite in a metal structure is 95% or more, at a sheet thickness center portion being a range of 5/8 to 3/8 in sheet thickness from the surface of the steel sheet, an average value of pole densities of the {100} to {223} orientation group is 4.0 or less, and a pole density of the {332} crystal orientation is 5.0 or less, and a mean volume diameter of crystal grains in the metal structure is 7 µm or less.
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5.发明公开HIGH-STRENGTH COLD-ROLLED STEEL SHEET WITH EXCELLENT LOCAL FORMABILITY, AND MANUFACTURING METHOD THEREFOR 有权与优秀的本土及其制造方法的成形性的高强度冷轧钢板
公开(公告)号：EP2698440A1
公开(公告)日：2014-02-19
申请号：EP12770870.9
申请日：2012-04-12
发明人： SUWA, Yoshihiro , NAKANO, Kazuaki , HAYASHI, Kunio , OKAMOTO, Riki , FUJITA, Nobuhiro , SANO, Kohichi
CPC分类号： C21D9/46 , B32B15/013 , C21D8/02 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0426 , C21D8/0436 , C21D8/0473 , C21D2201/05 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C21D2211/009 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/105 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/38 , C23C2/06 , C23C2/285 , C23C2/36 , Y10T428/12799
摘要： This high-strength hot-rolled steel sheet having excellent local deformability contains, in mass%, C: 0.07% to 0.20%; Si: 0.001% to 2.5%; Mn: 0.01% to 4.0%; P: 0.001% to 0.15%; S: 0.0005% to 0.03%; Al: 0.001% to 2.0%; N: 0.0005% to 0.01%; and O: 0.0005% to 0.01%; and a balance being composed of iron and inevitable impurities, in which an area ratio of bainite in a metal structure is 95% or more, at a sheet thickness center portion being a range of 5/8 to 3/8 in sheet thickness from the surface of the steel sheet, an average value of pole densities of the {100} to {223} orientation group is 4.0 or less, and a pole density of the {332} crystal orientation is 5.0 or less, and a mean volume diameter of crystal grains in the metal structure is 10 µm or less.
摘要翻译： 具有优异的局部变形这种高强度热轧钢板含有，以质量％计，C：0.07％〜0.20％到; 的Si：0.001％〜2.5％; 的Mn：0.01％〜4.0％; P：0.001％至0.15％; S：0.0005％〜0.03％; 的Al：0.001％〜2.0％; N：0.0005％至0.01％至; 和O：0.0005％〜0.01％至; 和剩余部分由其中铁和不可避免的杂质，以在金属结构贝氏体的面积率为95％以上，在以3/8板厚从板厚中心部为5/8的范围内 在钢板的表面，在{100}的极点密度的平均值<011>到{223} <110>取向基团为4.0或更小，和{332} <113>晶向的极密度为5.0 或更小，并且在该金属结构的晶粒的平均体积直径为10微米或更小。
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6.发明授权HIGH-STRENGTH HOT-DIPPED GALVANIZED STEEL SHEET AND HIGH-STRENGTH ALLOYED HOT-DIPPED GALVANIZED STEEL SHEET, EACH HAVING TENSILE STRENGTH OF 980 MPA OR MORE, EXCELLENT PLATING ADHESION, EXCELLENT FORMABILITY AND EXCELLENT BORE EXPANDING PROPERTIES, AND METHOD FOR PRODUCING SAME 有权高强度热浸镀锌钢板和高强度合金热浸镀锌钢板，每层具有980 MPA或更高的拉伸强度，优异的镀层附着力，优异的成型性和优异的孔扩展性能，以及生产同样的方法
公开(公告)号：EP2762592B1
公开(公告)日：2018-04-25
申请号：EP12837548.2
申请日：2012-09-28
CPC分类号： C23C2/06 , B32B15/013 , C21D8/0263 , C21D8/0426 , C21D8/0436 , C21D8/0473 , C21D8/0478 , C21D9/48 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C21D2211/009 , C22C18/00 , C22C18/04 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/34 , C22C38/38 , C23C2/02 , C23C2/28 , Y10T428/12799
摘要： Provided is a high-strength hot-dip galvanized steel sheet having excellent plating adhesion, formability, and hole expandability with an ultimate tensile strength of 980 MPa or more, the hot-dip galvanized steel sheet comprising a hot-dip galvanized layer formed on a surface of a base steel sheet. The base steel sheet contains, by mass%, C: 0.05% to 0.4%; Si: 0.01% to 3.0%; Mn: 0.1% to 3.0%; Al: 0.01 to 2.0%; in which Si + Al > 0.5%, P: limited to 0.04% or less; S: limited to 0.05% or less; N: limited to 0.01% or less; and a balance including Fe and inevitable impurities, a microstructure of the base steel sheet contains 40% or more by total volume fraction of martensite and bainite, 8% or more by volume fraction of residual austenite, and a balance of the microstructure being ferrite or ferrite and 10% or less by volume fraction of pearlite. The martensite contains 10% or more by total volume fraction of two or more kinds of three kinds of martensites (1), (2), and (3), and the hot-dip galvanized layer contains less than 7 mass% of Fe.
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7.发明公开HIGH-STRENGTH HOT-DIPPED GALVANIZED STEEL SHEET AND HIGH-STRENGTH ALLOYED HOT-DIPPED GALVANIZED STEEL SHEET, EACH HAVING TENSILE STRENGTH OF 980 MPA OR MORE, EXCELLENT PLATING ADHESION, EXCELLENT FORMABILITY AND EXCELLENT BORE EXPANDING PROPERTIES, AND METHOD FOR PRODUCING SAME 有权高强度热浸镀锌钢板和高强度合金化热浸镀锌钢板与每个980兆帕拉伸强度或多个突出的镀覆粘合性，良好的加工性和未决BOHRAUFWEITUNGSEIGENSCHAFTEN及其制造方法
公开(公告)号：EP2762592A1
公开(公告)日：2014-08-06
申请号：EP12837548.2
申请日：2012-09-28
CPC分类号： C23C2/06 , B32B15/013 , C21D8/0263 , C21D8/0426 , C21D8/0436 , C21D8/0473 , C21D8/0478 , C21D9/48 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C21D2211/009 , C22C18/00 , C22C18/04 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/34 , C22C38/38 , C23C2/02 , C23C2/28 , Y10T428/12799
摘要： Provided is a high-strength hot-dip galvanized steel sheet having excellent plating adhesion, formability, and hole expandability with an ultimate tensile strength of 980 MPa or more, the hot-dip galvanized steel sheet comprising a hot-dip galvanized layer formed on a surface of a base steel sheet. The base steel sheet contains, by mass%, C: 0.05% to 0.4%; Si: 0.01% to 3.0%; Mn: 0.1% to 3.0%; Al: 0.01 to 2.0%; in which Si + Al > 0.5%, P: limited to 0.04% or less; S: limited to 0.05% or less; N: limited to 0.01% or less; and a balance including Fe and inevitable impurities, a microstructure of the base steel sheet contains 40% or more by total volume fraction of martensite and bainite, 8% or more by volume fraction of residual austenite, and a balance of the microstructure being ferrite or ferrite and 10% or less by volume fraction of pearlite. The martensite contains 10% or more by total volume fraction of two or more kinds of three kinds of martensites (1), (2), and (3), and the hot-dip galvanized layer contains less than 7 mass% of Fe.
摘要翻译： 本发明提供一种具有优异的镀覆粘合性，可成形性和扩孔性与在980MPa以上的最大拉伸强度的高强度热浸镀锌钢板，热浸镀锌钢板，其包括一个热浸镀锌层上形成的 母材钢板的表面上。 母材钢板含有，以质量％计，C：0.05％〜0.4％; 的Si：0.01％〜3.0％; 的Mn：0.1％〜3.0％; 铝：0.01〜2.0％; 在其中Si +的Al> 0.5％，P：限于0.04％至或更小; 将S限制在0.05％以下; N限制在0.01％至或更小; 和的平衡包含Fe和不可避免的杂质，所述母材钢板的组织中含有40％或更多的马氏体和贝氏体，8％或更多的总体积分数由残余奥氏体的体积分数，和显微组织的存在铁素体的平衡或 铁素体和10％或珠光体的体积分数更小。 马氏体中含有10％或更多的两种或更多种三种集市站点中的总体积分数（1），（2）和（3），以及热浸镀锌层含有的Fe质量小于7％。
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公开(公告)号：EP3495530A1
公开(公告)日：2019-06-12
申请号：EP17837117.5
申请日：2017-08-04
发明人： SANO, Kohichi , UNO, Makoto , NISHIYAMA, Ryoichi , YAMAGUCHI, Yuji , SUGIURA, Natsuko , NAKATA, Masahiro
摘要： A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 0 to 30%, and bainite: 70 to 100%. When a region that is surrounded by a grain boundary having a misorientation of 15° or more and has a circle-equivalent diameter of 0.3 µ m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. A grain boundary number density of solid-solution C or a grain boundary number density of the total of solid-solution C and solid-solution B is 1 piece/nm 2 or more and 4.5 pieces/nm 2 or less. An average grain size of cementite precipitated at grain boundaries is 2 µ m or less.
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公开(公告)号：EP3495529A1
公开(公告)日：2019-06-12
申请号：EP17837116.7
申请日：2017-08-04
发明人： SANO, Kohichi , UNO, Makoto , NISHIYAMA, Ryoichi , YAMAGUCHI, Yuji , SUGIURA, Natsuko , NAKATA, Masahiro
摘要： A steel sheet has a specific chemical composition and has a structure represented by, by area ratio, ferrite: 5 to 95%, and bainite: 5 to 95%. When a region that is surrounded by a grain boundary having a misorientation of 15° or more and has a circle-equivalent diameter of 0.3 µ m or more is defined as a crystal grain, the proportion of crystal grains each having an intragranular misorientation of 5 to 14° to all crystal grains is 20 to 100% by area ratio. Hard crystal grains A in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1 × 10 16 to 1 × 10 19 pieces/cm 3 and soft crystal grains B in which precipitates or clusters with a maximum diameter of 8 nm or less are dispersed in the crystal grains with a number density of 1 × 10 15 pieces/cm 3 or less are contained, and the volume% of the hard crystal grains A/(the volume% of the hard crystal grains A + the volume% of the soft crystal grains B) is 0.1 to 0.9.
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10.发明授权HIGH-STRENGTH COLD-ROLLED STEEL SHEET WITH HIGHLY UNIFORM STRETCHABILTY AND EXCELLENT HOLE EXPANSIBILITY, AND PROCESS FOR PRODUCING SAME 有权具有高度均匀伸缩性和优异孔扩张性的高强度冷轧钢板及其生产工艺
公开(公告)号：EP2700728B1
公开(公告)日：2017-11-01
申请号：EP12774097.5
申请日：2012-04-19
发明人： TODA, Yuri , OKAMOTO, Riki , FUJITA, Nobuhiro , SANO, Kohichi , YOSHIDA, Hiroshi , OGAWA, Toshio
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/16 , C22C38/28 , C22C38/38 , C23C2/02 , C23C2/06 , C23C2/28 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/22 , C23C2/40 , C22C38/32
CPC分类号： C23C2/06 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D9/46 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C21D2211/009 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/28 , C22C38/32 , C22C38/38 , C23C2/02 , C23C2/28 , C23C2/40 , Y10T428/12799
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