公开(公告)号：US20100247957A1

公开(公告)日：2010-09-30

申请号：US12708109

申请日：2010-02-18

申请人： Tetsuji HOSHIKA ,  Sae Mizuta ,  Yuichi Futamura ,  Masaaki Miura ,  Yukihiro Utsumi ,  Hiroaki Matsumoto ,  Hiroki Ohta

发明人： Tetsuji HOSHIKA ,  Sae Mizuta ,  Yuichi Futamura ,  Masaaki Miura ,  Yukihiro Utsumi ,  Hiroaki Matsumoto ,  Hiroki Ohta

IPC分类号： B32B15/01 ,  C22C38/00 ,  C22C38/60 ,  C22C38/16 ,  C22C38/06 ,  C22C38/18 ,  C22C38/04 ,  C22C38/42

CPC分类号： C22C38/04 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/18 ,  Y10T428/12799 ,  Y10T428/12972 ,  Y10T428/2495

摘要： Disclosed is a cold-rolled steel sheet having a specific steel composition and having a composite steel structure including a ferrite structure and a martensite-containing second phase. In a surface region of the steel sheet from the surface to a depth one-tenth the gage, the number density of n-ary groups of inclusions determined by specific n-th determinations is 120 or less per 100 cm2 of a rolling plane, in which the distance in steel sheet rolling direction between outermost surfaces of two outermost particles of the group of inclusions is 80 μm or more. Also disclosed is a cold-rolled steel sheet having a specific steel composition and having a steel structure of a martensite single-phase structure. In the surface region, the number density of groups of inclusions, in which the distance between the outermost surfaces is 100 μm or more, is 120 or less per 100 cm2 of a rolling plane.

摘要翻译： 公开了一种具有特定钢组成并具有包括铁素体组织和含马氏体的第二相的复合钢结构的冷轧钢板。 从表面到表面十分之一的钢板的表面区域中，通过特定的第n次测定确定的夹杂物的n元组的数密度为每100平方厘米的轧制平面为120以下， 其中夹杂物组中两个最外层颗粒的最外表面之间的钢板轧制方向的距离为80μm以上。 还公开了具有特定钢组成并具有马氏体单相结构的钢结构的冷轧钢板。 在表面区域中，最外表面之间的距离为100μm以上的夹杂物组的数密度为每100平方厘米的轧制面为120个以下。

公开(公告)号：US08460800B2

公开(公告)日：2013-06-11

申请号：US12708109

申请日：2010-02-18

申请人： Tetsuji Hoshika ,  Sae Mizuta ,  Yuichi Futamura ,  Masaaki Miura ,  Yukihiro Utsumi ,  Hiroaki Matsumoto ,  Hiroki Ohta

发明人： Tetsuji Hoshika ,  Sae Mizuta ,  Yuichi Futamura ,  Masaaki Miura ,  Yukihiro Utsumi ,  Hiroaki Matsumoto ,  Hiroki Ohta

IPC分类号： B32B15/01 ,  B32B15/04 ,  B32B15/18

CPC分类号： C22C38/04 ,  C22C38/001 ,  C22C38/02 ,  C22C38/06 ,  C22C38/18 ,  Y10T428/12799 ,  Y10T428/12972 ,  Y10T428/2495

摘要： Disclosed is a cold-rolled steel sheet having a specific steel composition and having a composite steel structure including a ferrite structure and a martensite-containing second phase. In a surface region of the steel sheet from the surface to a depth one-tenth the gage, the number density of n-ary groups of inclusions determined by specific n-th determinations is 120 or less per 100 cm2 of a rolling plane, in which the distance in steel sheet rolling direction between outermost surfaces of two outermost particles of the group of inclusions is 80 μm or more. Also disclosed is a cold-rolled steel sheet having a specific steel composition and having a steel structure of a martensite single-phase structure. In the surface region, the number density of groups of inclusions, in which the distance between the outermost surfaces is 100 μm or more, is 120 or less per 100 cm2 of a rolling plane.

摘要翻译： 公开了一种具有特定钢组成并具有包括铁素体组织和含马氏体的第二相的复合钢结构的冷轧钢板。 从表面到表面十分之一的钢板的表面区域中，通过特定的第n次测定确定的夹杂物的n元组的数密度为每100平方厘米的轧制平面为120以下， 其中夹杂物组中两个最外层颗粒的最外表面之间的钢板轧制方向的距离为80μm以上。 还公开了具有特定钢组成并具有马氏体单相结构的钢结构的冷轧钢板。 在表面区域中，最外表面之间的距离为100μm以上的夹杂物组的数密度为每100平方厘米的轧制平面为120以下。

公开(公告)号：US08449988B2

公开(公告)日：2013-05-28

申请号：US13099616

申请日：2011-05-03

申请人： Atsuhiro Shiraki ,  Sae Hamamoto ,  Yukihiro Utsumi ,  Tetsuji Hoshika ,  Yuichi Futamura

发明人： Atsuhiro Shiraki ,  Sae Hamamoto ,  Yukihiro Utsumi ,  Tetsuji Hoshika ,  Yuichi Futamura

IPC分类号： B32B15/01 ,  B32B15/04 ,  B32B15/18

CPC分类号： C22C38/02 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  Y10T428/12493 ,  Y10T428/12799 ,  Y10T428/12972 ,  Y10T428/2495

摘要： A cold-rolled steel sheet has a chemical composition of C: 0.12% to 0.3%, Si: 0.5% or less, Mn: less than 1.5%, Al: 0.15% or less, N: 0.01% or less, P: 0.02% or less, and S: 0.01% or less, with the remainder including iron and inevitable impurities and has a martensite single-phase structure as its steel microstructure. In a surface region of the steel sheet from the surface to a depth one-tenth the gauge, the number density of n-ary groups of inclusions determined by specific n-th determinations is 120 or less per 100 cm2 of a rolling plane, where the distance in steel sheet rolling direction between outermost surfaces of two outermost particles of the group of inclusions is 100 μm or more. The steel sheet is a high-strength cold-rolled steel sheet which has a sufficiently minimized rate of bending fracture starting from inclusions and thereby has excellent bending workability.

摘要翻译： 冷轧钢板的化学成分为C：0.12〜0.3％，Si：0.5％以下，Mn：小于1.5％，Al：0.15％以下，N：0.01％以下，P：0.02 ％以下，S：0.01％以下，余量包括铁和不可避免的杂质，并具有马氏体单相结构作为其钢微观结构。 从表面到表面的十分之一的钢板的表面区域，通过特定的第n次测定确定的夹杂物的n元组的数密度为每100平方厘米的轧制平面为120以下，其中 夹杂物组的两个最外层颗粒的最外表面之间的轧制方向的距离为100μm以上。 钢板是从夹杂物开始的弯曲断裂率足够的最小化的弯曲加工性优异的高强度冷轧钢板。

公开(公告)号：US20110287280A1

公开(公告)日：2011-11-24

申请号：US13099616

申请日：2011-05-03

申请人： Atsuhiro SHIRAKI ,  Sae Hamamoto ,  Yukihiro Utsumi ,  Tetsuji Hoshika ,  Yuichi Futamura

发明人： Atsuhiro SHIRAKI ,  Sae Hamamoto ,  Yukihiro Utsumi ,  Tetsuji Hoshika ,  Yuichi Futamura

IPC分类号： B32B15/00 ,  C22C38/42 ,  C22C38/16 ,  C22C38/00 ,  C22C38/18 ,  C22C38/08 ,  C22C38/12 ,  C22C38/20 ,  C22C38/06

CPC分类号： C22C38/02 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  Y10T428/12493 ,  Y10T428/12799 ,  Y10T428/12972 ,  Y10T428/2495

摘要： A cold-rolled steel sheet has a chemical composition of C: 0.12% to 0.3%, Si: 0.5% or less, Mn: less than 1.5%, Al: 0.15% or less, N: 0.01% or less, P: 0.02% or less, and S: 0.01% or less, with the remainder including iron and inevitable impurities and has a martensite single-phase structure as its steel microstructure. In a surface region of the steel sheet from the surface to a depth one-tenth the gauge, the number density of n-ary groups of inclusions determined by specific n-th determinations is 120 or less per 100 cm2 of a rolling plane, where the distance in steel sheet rolling direction between outermost surfaces of two outermost particles of the group of inclusions is 100 μm or more. The steel sheet is a high-strength cold-rolled steel sheet which has a sufficiently minimized rate of bending fracture starting from inclusions and thereby has excellent bending workability.

摘要翻译： 冷轧钢板的化学成分为C：0.12〜0.3％，Si：0.5％以下，Mn：小于1.5％，Al：0.15％以下，N：0.01％以下，P：0.02 ％以下，S：0.01％以下，余量包括铁和不可避免的杂质，并具有马氏体单相结构作为其钢微观结构。 从表面到表面的十分之一的钢板的表面区域，通过特定的第n次测定确定的夹杂物的n元组的数密度为每100平方厘米的轧制平面为120以下，其中 夹杂物组中两个最外层颗粒的最外表面之间的钢板轧制方向的距离为100μm以上。 钢板是从夹杂物开始的弯曲断裂率足够的最小化的弯曲加工性优异的高强度冷轧钢板。

公开(公告)号：US20120312433A1

公开(公告)日：2012-12-13

申请号：US13489005

申请日：2012-06-05

申请人： Sae MIZUTA ,  Yuichi FUTAMURA ,  Yukihiro Utsumi

发明人： Sae MIZUTA ,  Yuichi FUTAMURA ,  Yukihiro Utsumi

IPC分类号： C21D8/02 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/06

CPC分类号： C21D1/20 ,  C21D8/0447 ,  C21D8/0463 ,  C21D8/0473 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18

摘要： The invention relates to a steel sheet having a tensile strength of 1180 MPa or more, which excels in workability and cold brittleness resistance. The high-strength steel sheet contains 0.10% to 0.30% of C, 1.40% to 3.0% of Si, 0.5% to 3.0% of Mn, 0.1% or less of P, 0.05% or less of S, 0.005% to 0.20% of Al, 0.01% or less of N, 0.01% or less of O, as well as Fe and inevitable impurities. The steel sheet has: (i) a ferrite volume fraction of 5% to 35% and a bainitic ferrite and/or tempered martensite volume fraction of 60% or more; (ii) a MA constituent volume fraction of 6% or less (excluding 0%); and (iii) a retained austenite volume fraction of 5% or more.

摘要翻译： 本发明涉及一种拉伸强度为1180MPa以上的钢板，其加工性和耐冷脆性优异。 高强度钢板含有C：0.10〜0.30％，Si：1.40〜3.0％，Mn：0.5〜3.0％，P：0.1％以下，S：0.05％以下，S：0.005〜0.20％ 的Al，0.01％以下的N，0.01％以下的O，以及Fe和不可避免的杂质。 钢板具有：（i）铁素体体积分数为5％〜35％，贝氏体铁素体和/或回火马氏体体积分数为60％以上; （ii）6％以下（不包括0％）的MA成分体积分数; 和（iii）残留奥氏体体积分数为5％以上。

公开(公告)号：US09745639B2

公开(公告)日：2017-08-29

申请号：US13489005

申请日：2012-06-05

申请人： Sae Mizuta ,  Yuichi Futamura ,  Yukihiro Utsumi

发明人： Sae Mizuta ,  Yuichi Futamura ,  Yukihiro Utsumi

IPC分类号： C22C38/04 ,  C22C38/02 ,  C21D1/20 ,  C21D9/46 ,  C22C38/00 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C21D8/04

CPC分类号： C21D1/20 ,  C21D8/0447 ,  C21D8/0463 ,  C21D8/0473 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18

摘要： The invention relates to a steel sheet having a tensile strength of 1180 MPa or more, which excels in workability and cold brittleness resistance. The high-strength steel sheet contains 0.10% to 0.30% of C, 1.40% to 3.0% of Si, 0.5% to 3.0% of Mn, 0.1% or less of P, 0.05% or less of S, 0.005% to 0.20% of Al, 0.01% or less of N, 0.01% or less of O, as well as Fe and inevitable impurities. The steel sheet has: (i) a ferrite volume fraction of 5% to 35% and a bainitic ferrite and/or tempered martensite volume fraction of 60% or more; (ii) a MA constituent volume fraction of 6% or less (excluding 0%); and (iii) a retained austenite volume fraction of 5% or more.

公开(公告)号：US09738956B2

公开(公告)日：2017-08-22

申请号：US13635696

申请日：2011-03-25

申请人： Muneaki Ikeda ,  Yukihiro Utsumi ,  Masaaki Miura

发明人： Muneaki Ikeda ,  Yukihiro Utsumi ,  Masaaki Miura

IPC分类号： C22C38/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C21D6/00 ,  C21D8/02

CPC分类号： C22C38/02 ,  C21D6/005 ,  C21D6/008 ,  C21D8/02 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06

摘要： Disclosed is an ultra high strength steel plate with at least 1100 MPa of tensile strength that has both an excellent strength-stretch balance and excellent bending workability, and a method for producing the same. The metal structure of the steel plate has martensite, and the soft phases of bainitic ferrite and polygonal ferrite. The area of the aforementioned martensite constitutes 50% or more, the area of the aforementioned bainitic ferrite constitutes 15% or more, and the area of the aforementioned polygonal ferrite constitutes 5% or less (including 0%). When the circle-equivalent diameter of the aforementioned soft phases is measured, the coefficient of variation (standard deviation/mean value) is less or equal to 1.0. The ultra high strength steel plate has at least 1100 MPa of tensile strength.

公开(公告)号：US20130008570A1

公开(公告)日：2013-01-10

申请号：US13635696

申请日：2011-03-25

申请人： Muneaki Ikeda ,  Yukihiro Utsumi ,  Masaaki Miura

发明人： Muneaki Ikeda ,  Yukihiro Utsumi ,  Masaaki Miura

IPC分类号： B32B15/01 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C21D8/02 ,  C22C38/02

CPC分类号： C22C38/02 ,  C21D6/005 ,  C21D6/008 ,  C21D8/02 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06

摘要： Disclosed is an ultra high strength steel plate with at least 1100 MPa of tensile strength that has both an excellent strength-stretch balance and excellent bending workability, and a method for producing the same. The metal structure of the steel plate has martensite, and the soft phases of bainitic ferrite and polygonal ferrite. The area of the aforementioned martensite constitutes 50% or more, the area of the aforementioned bainitic ferrite constitutes 15% or more, and the area of the aforementioned polygonal ferrite constitutes 5% or less (including 0%). When the circle-equivalent diameter of the aforementioned soft phases is measured, the coefficient of variation (standard deviation/mean value) is less or equal to 1.0. The ultra high strength steel plate has at least 1100 MPa of tensile strength.

摘要翻译： 公开了具有至少1100MPa的拉伸强度的超高强度钢板，其具有优异的强度拉伸平衡和优异的弯曲加工性，及其制造方法。 钢板的金属结构具有马氏体，贝氏体铁素体和多边形铁素体的软相。 上述马氏体的面积为50％以上，上述贝氏体铁素体的面积为15％以上，上述多边形铁素体的面积为5％以下（含0％）。 当测量上述软相的圆当量直径时，变异系数（标准偏差/平均值）小于或等于1.0。 超高强度钢板的拉伸强度至少为1100MPa。

公开(公告)号：US20090025831A1

公开(公告)日：2009-01-29

申请号：US11908431

申请日：2006-03-24

申请人： Katsuhiro Yamamoto ,  Masaaki Miura ,  Yukihiro Utsumi

发明人： Katsuhiro Yamamoto ,  Masaaki Miura ,  Yukihiro Utsumi

IPC分类号： C22C38/22 ,  C22C38/32

CPC分类号： C23C2/06 ,  C21D1/42 ,  C21D9/46 ,  C21D9/56 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/02 ,  C22C38/22 ,  C22C38/38 ,  Y02P10/253

摘要： Disclosed is a hot-dip galvanized steel sheet, in which a steel sheet of the hot-dip galvanized steel sheet before galvanization contains, on the percent by mass basis, 0.06% to 0.15% carbon (C); 1% to 3% manganese (Mn); 0.01% to 0.05% phosphorus (P); 0.03% to 1% chromium (Cr); 0.03% to 1% molybdenum (Mo); and 0.02% to 0.15% aluminum (Al). The steel sheet before galvanization has a silicon (Si) content of 0.2% or less (inclusive of 0%) and a sulfur (S) content of 0.03% or less (inclusive of 0%) and has a K value of −2.0 or more, in which the K value is calculated according to following Equation (1): K value=3×[Mo]−5×[Cr]  (1) wherein “[Element]” represents the content (percent by mass) of the element.

摘要翻译： 公开了一种热镀锌钢板，其中镀锌前的热浸镀锌钢板的钢板以质量％计含有0.06％至0.15％的碳（C）; 1％至3％锰（Mn）; 0.01％〜0.05％磷（P）; 0.03％至1％的铬（Cr）; 0.03％〜1％的钼（Mo）; 和0.02％至0.15％的铝（Al）。 镀锌前的钢板的硅（Si）含量为0.2％以下（含0％），硫（S）含量为0.03％以下（含0％），K值为-2.0或 其中K值根据以下等式（1）计算：<？in-line-formula description =“In-line formula”end =“lead”？> K value = 3x [Mo] -5x [Cr ]（1）<？in-line-formula description =“In-line Formulas”end =“tail”？>其中“[Element]”表示元素的内容（质量百分比）。

公开(公告)号：US20050247383A1

公开(公告)日：2005-11-10

申请号：US11110930

申请日：2005-04-21

申请人： Yukihiro Utsumi ,  Katsuhiro Yamamoto

发明人： Yukihiro Utsumi ,  Katsuhiro Yamamoto

IPC分类号： C21D8/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/40 ,  B32B15/18

CPC分类号： C21D8/00 ,  Y10T428/12799 ,  Y10T428/12972

摘要： A high-strength hot-dip galvanized steel sheet is provided which comprises a composite structure consisting essentially of ferrite and martensite. The steel comprises, by mass %, C: 0.05 to 0.12%, Si: not more than 0.05%, Mn: 2.7 to 3.5%, Cr: 0.2 to 0.5%, Mo: 0.2 to 0.5%, Al: not more than 0.10%, P: not more than 0.03%, and S: not more than 0.03%. The high-strength hot-dip galvanized steel sheet has not only excellent spot weldability, but also excellent “stability of material properties”, including tensile strength, total elongation, and yield strength, in a high range of strengths from 780 to 1180 MPa, even if the manufacturing condition (especially, the condition of the cooling process after annealing the steel sheet) is changed.

摘要翻译： 提供了一种高强度热浸镀锌钢板，其包括主要由铁素体和马氏体组成的复合结构。 所述钢以质量％计含有C：0.05〜0.12％，Si：不大于0.05％，Mn：2.7〜3.5％，Cr：0.2〜0.5％，Mo：0.2〜0.5％，Al：0.10以下 ％，P：不大于0.03％，S：不大于0.03％。 高强度热浸镀锌钢板在780〜1180MPa的高强度范围内不仅具有优异的点焊性，而且具有优异的“材料性能的稳定性”，包括拉伸强度，总伸长率和屈服强度， 即使制造条件（特别是钢板退火后的冷却处理的条件）发生变化。