公开(公告)号：EP2975149A4

公开(公告)日：2016-11-16

申请号：EP14764532

申请日：2014-03-10

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： MIZOGUCHI MASAKI ,  ICHIKAWA KAZUTOSHI ,  HOSHINO MANABU ,  MITSUYASU KAZUAKI ,  SUGIYAMA HIROKAZU

IPC分类号： C22C38/00 ,  C21C7/04 ,  C21D8/00 ,  C22C38/14 ,  C22C38/58

CPC分类号： E04C3/06 ,  B22D1/00 ,  B22D25/02 ,  C21D8/00 ,  C21D8/0226 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/004 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  E04C2003/0452

摘要： An H-section steel has a predetermined chemical composition in which a thickness of a flange is 100 mm to 150 mm, at a strength evaluation position an area fraction of bainite in a steel structure is 80% or more, yield strength or 0.2% proof strength is 450 MPa or more, tensile strength is 550 MPa or more and 680 MPa or less, at a toughness evaluation position an average austenite grain size in the steel structure is 150 µm or less, and (Mg, Mn)S having a particle size of 0.005 µm to 0.5 µm is included at a density of 1.0×10 5 pieces/mm 2 to 1.0×10 7 pieces/mm 2 .

公开(公告)号：EP2792761A4

公开(公告)日：2015-06-03

申请号：EP12856806

申请日：2012-12-11

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： ICHIKAWA KAZUTOSHI ,  MIZOGUCHI MASAKI ,  MITSUYASU KAZUAKI ,  SUGIYAMA HIROKAZU

IPC分类号： C22C38/00 ,  C21D8/00 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

CPC分类号： C22C38/54 ,  C21D8/00 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/58

摘要： This H-beam steel has a composition including C, Si, Mn, Cu, Ni, V, Al, Ti, B, N, and O, and further including at least one of Mo and Nb, in which Ceq obtained in Equation 1 described below falls in a range of 0.37 to 0.50, the thickness of a flange falls in a range of 100 to 150 mm, and the area fraction of bainite at a depth of one quarter of the thickness of the flange from the external surface of the flange is 60% or more. Ceq = C + Mn / 6 + Mo + V / 5 + Ni + Cu / 15 where C, Mn, Mo, V, Ni, and Cu represent the amount of each element contained.

公开(公告)号：EP3133181A4

公开(公告)日：2017-10-11

申请号：EP15780168

申请日：2015-04-09

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： MIZOGUCHI MASAKI ,  ICHIKAWA KAZUTOSHI ,  MITSUYASU KAZUAKI ,  SUGIYAMA HIROKAZU

IPC分类号： C22C38/00 ,  B22D25/02 ,  C21C7/00 ,  C21C7/06 ,  C21D8/00 ,  C21D9/00 ,  C22C33/04 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/58 ,  E04C3/04

CPC分类号： C21D9/0068 ,  B22D25/02 ,  C21C7/0006 ,  C21C7/06 ,  C21D8/00 ,  C21D8/005 ,  C22C33/04 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/58 ,  E04C3/04

摘要： An H-section steel has a predetermined chemical composition, in which a Mg-containing oxide having an equivalent circle diameter of 0.005 µm to 0.5 µm is contained at a total number density of 100 pieces/mm 2 to 5000 pieces/mm 2 , a thickness of a flange is 100 mm to 150 mm, at a strength evaluation portion which is at a 1/6 position from a surface of the flange in a length direction and at a 1/4 position from the surface in a thickness direction, a fraction of bainite in a steel structure is 80% or more, and the average prior austenite grain size is 70 µm or more, and at a toughness evaluation portion which is at a 1/2 position from the surfaces of the flange in the length direction and at a 3/4 position from the surface of the flange in the thickness direction, the average prior austenite grain size in a steel structure is 200 µm or less.

公开(公告)号：EP3085803A4

公开(公告)日：2017-08-16

申请号：EP14871161

申请日：2014-12-05

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： MIZOGUCHI MASAKI ,  ICHIKAWA KAZUTOSHI ,  MITSUYASU KAZUAKI ,  SUGIYAMA HIROKAZU

IPC分类号： C22C38/00 ,  C21C7/04 ,  C21C7/06 ,  C21D8/00 ,  C22C38/14 ,  C22C38/58

CPC分类号： C21D9/0068 ,  B21B1/088 ,  B22D25/02 ,  C21C7/06 ,  C21D1/60 ,  C21D8/005 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/004 ,  C22C33/04 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

摘要： An H-section steel has a predetermined chemical composition in which Ti oxides having a grain size of 0.01 µm to 3.0 µm are included at a density of 30 pieces/mm 2 or more, a thickness of a flange is 100 mm to 150 mm, an area fraction of bainite at a 1/6 position from a surface of the flange in a length direction and at a 1/4 position from the surface thereof in a thickness direction is 80% or more, a yield strength or 0.2% proof stress is 450 MPa or more, and a tensile strength is 550 MPa or more, a Charpy absorbed energy at 21 °C at a 1/2 position from the surface of the flange in the length direction and at a 3/4 position from the surface thereof in the thickness direction is 100 J or more, and an average austenite grain size is 50 µm to 200 µm.

摘要翻译： H型钢具有预定的化学组成，其中以30个/ mm 2以上的密度包含粒径为0.01μm至3.0μm的Ti氧化物，凸缘的厚度为100mm至150mm， 在从凸缘的表面沿长度方向的1/6位置和距其表面的厚度方向的1/4位置处的贝氏体的面积分数为80％以上，屈服强度或0.2％屈服强度 为450MPa以上，拉伸强度为550MPa以上，距离凸缘部的长度方向的1/2处和离表面3/4的位置处的21℃下的夏比吸收能量 在厚度方向上为100J以上，平均奥氏体粒径为50μm〜200μm。

公开(公告)号：EP2865779A4

公开(公告)日：2016-04-20

申请号：EP13856612

申请日：2013-11-13

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： MIZOGUCHI MASAKI ,  ICHIKAWA KAZUTOSHI ,  MITSUYASU KAZUAKI ,  SUGIYAMA HIROKAZU

IPC分类号： C22C38/00 ,  B21B1/088 ,  B21B3/00 ,  C21C7/04 ,  C21C7/06 ,  C21D8/00 ,  C22C38/14 ,  C22C38/58

CPC分类号： E04C2/30 ,  B21B1/088 ,  B21B3/00 ,  C21C7/04 ,  C21C7/064 ,  C21D1/60 ,  C21D6/001 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/00 ,  C21D8/005 ,  C21D8/0226 ,  C21D8/0247 ,  C21D2211/002 ,  C21D2211/004 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  E04C2/08 ,  E04C3/04

摘要： There is provided an H-section steel in which a number density of oxide particles having an equivalent circle diameter of 0.005µm to 2.0 µm per unit area is 100 pieces/mm 2 to 5000 pieces/mm 2 , the oxide particles includes Ca, Al, and O as a composition, the amount of Ca is 5% or more, the amount of Al is 5% or more, and a total amount of Ca and Al is 50% or more by mass ratio excluding O in the oxide particles, a thickness of the flange is 100 mm to 150 mm, a bainite fraction in a metallographic structure of the flange is 80% or more at a strength evaluation position, and an average prior austenite grain size in the metallographic structure of the flange is 200 µm or less at a toughness evaluation position.

摘要翻译： 提供H型钢，其中每单位面积的当量圆直径为0.005μm至2.0μm的氧化物颗粒的数密度为100个/ mm 2至5000个/ mm 2，氧化物颗粒包括Ca，Al 和O作为组成，Ca的量为5％以上，Al的量为5％以上，Ca和Al的总量在氧化物粒子中除O之外的为50质量％以上， 凸缘的厚度为100mm至150mm，凸缘的金相结构中的贝氏体分数在强度评估位置为80％以上，凸缘的金相组织中的平均奥氏体晶粒尺寸平均为200μm 以下的韧性评价位置。