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：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：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：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。