公开(公告)号：EP2873747A4

公开(公告)日：2015-10-28

申请号：EP13838200

申请日：2013-09-13

申请人： JFE STEEL CORP

发明人： MIURA SHINICHI ,  UEDA KEIJI ,  ISHIKAWA NOBUYUKI

IPC分类号： C22C38/38 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/60

CPC分类号： C22C38/60 ,  C21D1/18 ,  C21D1/185 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0247 ,  C21D9/46 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

摘要： An abrasion resistant steel plate having excellent low-temperature toughness and excellent corrosive wear resistance, the steel plate has the composition containing by mass%: 0.10% to 0.20% C, 0.05% to 1.00% Si, 0.1% to 2. 0% Mn, 0.020% or less P, 0.005% or less S, 0.005% to 0.100% Al, one or two kinds of components selected from a group consisting of 0.05% to 2.0% Cr and 0.05% to 1.0% Mo, and remaining Fe and unavoidable impurities as a balance. The content of solute Cr in steel (Crsol) and the content of solute Mo in steel (Mosol) satisfy the formula 0.05 ‰¤ (Crsol+2.5Mosol) ‰¤ 2.0. The steel plate has a structure where an as-quenched martensitic phase forms a main phase and a grain size of prior austenite grains is 30 µm or less, and surface hardness of the steel plate is 360 or more at Brinel hardness HBW10/3000.

摘要翻译： 具有优异的低温韧性和优异的耐腐蚀性的耐磨钢板，该钢板的组成为：质量％：0.10〜0.20％，Si：0.05〜1.00％，Mn：0.1〜2.0％ ，0.020％以下的P，0.005％以下的S，0.005〜0.100％的Al，选自0.05％〜2.0％的Cr和0.05％〜1.0％的Mo的一种或两种成分，剩余的Fe和 不可避免的杂质作为平衡。 钢中的溶质Cr（Crsol）含量和钢中的溶质Mo含量（Mosol）满足公式0.05‰（Crsol + 2.5Mosol）‰‰2.0。 钢板具有淬火后的马氏体相形成主相的结构，原奥氏体晶粒的晶粒尺寸为30μm以下，Brinel硬度HBW10 / 3000时的钢板的表面硬度为360以上。

公开(公告)号：EP3178954A4

公开(公告)日：2018-01-10

申请号：EP15829208

申请日：2015-07-31

申请人： JFE STEEL CORP

发明人： UEDA KEIJI ,  KANEKO SHINJIRO ,  IWASAKI MASAMI ,  SUGIHARA REIKO ,  YOKOTA TAKESHI ,  SETO KAZUHIRO

IPC分类号： C22C38/00 ,  C21D1/26 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

CPC分类号： C21D9/46 ,  C21D1/26 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

摘要： A cold-rolled steel sheet having excellent spot weldability suitable for use in vehicles, electric appliances, etc. is provided. The cold-rolled steel sheet has a steel composition containing, in mass%: C: 0.05% to 0.13%; Si: 0.05% to 2.0%; Mn: 1.5% to 4.0%; P: 0.05% or less; S: 0.005% or less; Al: 0.01% to 0.10%; Cr: 0.05% to 1.0%; Nb: 0.010% to 0.070%; Ti: 0.005% to 0.040%; and N: 0.0005% to 0.0065%, with a mass ratio Ti/N of Ti and N being 2.5 or more and 7.5 or less, and a balance being Fe and incidental impurities, wherein 70 mass% or more ofTi in steel exists as a precipitate, and 15 mass% or more of Nb in the steel exists as solute Nb, and a tensile strength is 980 MPa or more.

公开(公告)号：EP2589676A4

公开(公告)日：2017-04-19

申请号：EP11801027

申请日：2011-06-29

申请人： JFE STEEL CORP

发明人： UEDA KEIJI ,  SUZUKI SHINICHI

IPC分类号： C22C38/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

CPC分类号： C22C38/54 ,  C21D8/02 ,  C21D9/46 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

摘要： An abrasion resistant steel plate which is excellent in weld toughness and delayed fracture resistance and is preferably used in construction machines, industrial machines and the like is provided. To be more specific, the composition of the steel plate contains by mass% 0.20 to 0.30% C, 0.05 to 1.0% Si, 0.40 to 1.2% Mn, 0.010% or less P, 0.005% or less S, 0.40 to 1.5% Cr, 0.005 to 0.025% Nb, 0.005 to 0.03% Ti, 0.1% or less Al and 0.01% or less N, and further contains one, two or more kinds of components selected from a group consisting of Mo, W, B, Cu, Ni, V, REM, Ca and Mg when necessary, wherein DI* (DI* = 33.85 × (0.1×C) 0.5 × (0.7×Si+1) × (3.33×Mn+1) × (0.35×Cu+1) × (0.36×Ni+1) × (2.16×Cr+1) × (3×Mo+1) × (1.75×V+1) × (1.5×W+1)) is 45 to 180, C+Mn/4-Cr/3+10P‰¤0.47, and a base phase of the microstructure is formed of martensite.

摘要翻译： 耐磨钢板所有其具有优异的焊接部韧性和耐延迟断裂特性和优选在建筑机械，工业机械等中使用的设置。 更具体地，钢板的组成中含有以质量％计12:20至00：30％C，0:05〜1.0％的Si，0:40〜1.2％的Mn，0.010％或更少的P，0.005％或更少的S，0:40至1.5％的Cr ，0005〜0.025％的Nb，0.005〜0.03％与Ti，0.1％以下Al和0：01％或更低的N，并且还含有组分中的一种，两种或更多种选自由Mo，W，B，Cu中， 的Ni，V，REM，Ca和Mg在必要时，worin DI *（DI * = 33.85×（0.1×C）0.5×（0.7×Si + 1之间）×（3:33×锰+ 1）×（12:35×铜+ 1 ）×（12时36×的Ni + 1）×（2.16×铬+ 1）×（3×沫+ 1）×（1.75×V + 1）×（1.5×W + 1））为45〜180，C +锰 /4-Cr/3+10P‰¤0.47，和微观结构的基相形成马氏体。

公开(公告)号：EP2873748A4

公开(公告)日：2015-10-28

申请号：EP13839513

申请日：2013-09-13

申请人： JFE STEEL CORP

发明人： MIURA SHINICHI ,  UEDA KEIJI ,  ISHIKAWA NOBUYUKI ,  TAKAYAMA NAOKI

IPC分类号： C22C38/38 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/40 ,  C22C38/60

CPC分类号： C22C38/001 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/001 ,  C21D2211/008 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/40 ,  C22C38/60

摘要： Provided is an abrasion resistant steel plate which possesses excellent abrasion resistance, excellent low-temperature toughness and excellent corrosive wear resistance. An abrasion resistant steel plate includes the composition containing by mass%: 0.23% to 0.35% C, 0.05% to 1.00% Si, 0.1% to 2.0% Mn, 0.020% or less P, 0.005% or less S, 0.005% to 0.100% Al, 0.03% to 2.0% Cr, and 0.03% to 1.0% Mo in a state where DI* defined by the following formula (1) is satisfied 45 or more, and further containing remaining Fe and unavoidable impurities as a balance. The steel plate has a structure where an as-quenched martensitic phase forms a main phase and a grain size of prior austenite grains is 30 µm or less, and surface hardness of the steel plate is 450 or more at Brinel hardness HBW10/3000.

公开(公告)号：EP3228722A4

公开(公告)日：2017-11-08

申请号：EP16752073

申请日：2016-01-25

申请人： JFE STEEL CORP

发明人： OBATA YOSHIE ,  KAWASAKI YOSHIYASU ,  UEDA KEIJI ,  KANEKO SHINJIRO ,  YOKOTA TAKESHI ,  SETO KAZUHIRO

IPC分类号： C22C38/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/60 ,  C23C2/06

CPC分类号： C22C38/60 ,  C21D8/0236 ,  C21D8/0268 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23C2/06

摘要： Provided are a thin high-strength cold-rolled steel sheet having small in-plane anisotropies and a method for producing the thin high-strength cold-rolled steel sheet. A steel having a composition containing, by mass, C: more than 0.20% and 0.45% or less, Si: 0.50% to 2.50%, Mn: 2.00% or more and less than 3.50%, and one or two elements selected from Ti: 0.005% to 0.100% and Nb: 0.005% to 0.100% is hot-rolled and subsequently cold-rolled at a rolling reduction of 30% or more. The resulting thin cold-rolled steel sheet is heated to 800°C to 950°C and subsequently cooled to a cooling-end temperature of 350°C to 500°C at a cooling rate of 5 °C/s or more to form a steel sheet having a microstructure including a martensite phase and a bainite phase such that the total proportion of the martensite phase and the bainite phase is 80% or more by volume. The steel sheet is heated to 700°C to 840°C and maintained at 700°C to 840°C, subsequently cooled to a cooling-end temperature of 350°C to 500°C at a cooling rate of 5 to 50 °C/s, and maintained within the above temperature range for 10 to 1800 s. This enables a microstructure including, by volume, 15% or more and 70% or less ferrite phase, more than 15% and 40% or less retained austenite phase, and 30% or less martensite phase to be formed. Furthermore, a retained austenite phase constituted by acicular and fine crystal grains having an average diameter of 2.0 µm or less and an aspect ratio of 2.0 or more can be formed. As a result, the thin high-strength cold-rolled steel sheet has excellent production consistency, a TS of 980 MPa or more, high ductility, and small in-plane anisotropies.

公开(公告)号：EP2881482A4

公开(公告)日：2015-10-21

申请号：EP13825109

申请日：2013-07-29

申请人： JFE STEEL CORP

发明人： UEDA KEIJI ,  MIURA SHINICHI ,  ISHIKAWA NOBUYUKI

IPC分类号： C22C38/00 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/54

CPC分类号： C22C38/50 ,  C21D6/001 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/008 ,  C21D2221/10 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/54

摘要： A wear resistant steel plate that exhibits excellent impact wear resistant properties and that is suitable for use in construction machinery, shipbuilding, steel pipes or tubes, civil engineering, construction and so on, and a method for manufacturing the same. The wear resistant steel plate includes a specific steel composition, where DI* defined by Formula 1 is 100-250, and has a surface layer part containing 90% or more in area ratio of martensite, a Brinell hardness of 450 HBW 10/3000 or more, and a central part in thickness direction of the steel plate containing 70% or more in area ratio of lower bainite, the central part representing a zone extending from a 1/2 position of the steel plate thickness to distances of 0.5 mm toward both surfaces of the steel plate. DI * = 33.85 × 0.1 × C 0.5 × 0.7 × Si + 1 × 3.33 × Mn + 1 × 0.35 × Cu + 1 × 0.36 × Ni + 1 × 2.16 × Cr + 1 × 3 × Mo + 1 × 1.75 × V + 1 × 1.5 × V + 1 where the symbols of elements represent the contents by mass% of the elements, respectively.

摘要翻译： 一种耐磨损钢板，具有优异的耐冲击性能，适用于建筑机械，造船，钢管或管材，土木工程，建筑等，其制造方法。 耐磨钢板包括特定钢组合物，其中由式1定义的DI *为100-250，并且具有包含90％或更多的马氏体面积比的表面层部分，布氏硬度为450HBW 10/3000或 更多的是钢板的厚度方向的中心部分，其含有下贝氏体的面积比为70％以上，中心部分表示从钢板厚度的1/2位置延伸到距离两端的距离为0.5mm的区域 钢板表面。 DI * = 33.85×0.1×C 0.5×0.7×Si + 1×3.33×Mn + 1×0.35×Cu + 1×0.36×Ni + 1×2.16×Cr + 1×3×Mo + 1×1.75×V + 1×1.5×V + 1，其中元素的符号分别表示元素的质量％的含量。

公开(公告)号：EP2695960A4

公开(公告)日：2014-12-03

申请号：EP12764169

申请日：2012-03-28

申请人： JFE STEEL CORP

发明人： UEDA KEIJI ,  ISHIKAWA NOBUYUKI

IPC分类号： C22C38/00 ,  C21D8/02 ,  C22C38/32 ,  C22C38/54

CPC分类号： C21D8/0263 ,  C21D1/25 ,  C21D8/0426 ,  C21D8/0463 ,  C21D8/0473 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/18 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/40 ,  C22C38/50

摘要： Provided is an abrasion resistant steel plate or steel sheet suitable for use in construction machines, industrial machines, and the like and a method for manufacturing the same. In particular, a steel plate or steel sheet excellent in resistance to stress corrosion cracking has a composition containing 0.20% to 0.30% C, 0.05% to 1.0% Si, 0.40% to 1.20% Mn, P, S, 0.1% or less Al, 0.01% or less N, and 0.0003% to 0.0030% B on a mass basis, the composition further containing one or more of Cr, Mo, and W, the composition further containing one or more of Nb, Ti, Cu, Ni, V, an REM, Ca, and Mg as required, the remainder being Fe and inevitable impurities. DI* due to contained components is 45 or more. A microstructure has a base phase or main phase that is tempered martensite. Cementite having a grain size of 0.05 µm or less in terms of equivalent circle diameter is present in the steel plate or steel sheet at 2 x 10 6 grains/mm 2 or more. A semi-finished product having the above steel composition is heated, hot rolling is performed, air cooling is performed, reheating is performed, and accelerated cooling is then performed or accelerated cooling is performed immediately after hot rolling.

摘要翻译： 本发明提供一种耐磨钢板或钢板适用于建筑机械，工业机械用等的和用于制造其的方法。 特别是，钢板或钢板具有优异的抗应力腐蚀开裂具有含有0.20％至到12的组合物：30％C，0.05％至1.0％的Si，0.40％至1.20％的Mn，P，S，0.1％或以下的Al ，0：01％或更低的N，0.0003％至以质量计在Cu 0.0030％B，还含有的Cr，Mo和W中的一个或多个组合物中，还含有铌，钛，Ni中的一种或多种组合物中， V，REM，Ca和Mg作为需要，余量由Fe和不可避免的杂质。 DI *由于包含成分为45或更大。 微观结构具有基部相或主相也被回火马氏体。 具有0:05微米或更小的当量圆直径计的粒度渗碳是存在于以2×10 6个颗粒/ mm 2以上的钢板或钢板。 具有上述钢组成的半成品被加热，热轧进行，空气进行冷却，再加热被执行，并且然后加速冷却进行或加速冷却热轧后立即进行。

公开(公告)号：EP2589675A4

公开(公告)日：2018-01-03

申请号：EP11801023

申请日：2011-06-29

申请人： JFE STEEL CORP

发明人： UEDA KEIJI ,  SUZUKI SHINICHI

IPC分类号： C22C38/00 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/54

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

摘要： An abrasion resistant steel plate which is excellent in toughness and delayed fracture resistance of a multi pass weld and is preferably used in construction machines, industrial machines and the like is provided. To be more specific, the composition of the steel plate contains by mass% 0.20 to 0.30% C, 0.05 to 1.0% Si, 0.40 to 1.2% Mn, 0.010% or less P, 0.005% or less S, 0.40 to 1.5% Cr, 0.005 to 0.025% Nb, 0.05 to 1.0% Mo, 0.005 to 0.03% Ti, 0.1% or less Al, 0.01% or less N, and 0. 0003 to 0. 0020% B, and further contains one, two or more kinds of components selected from a group consisting of W, Cu, Ni, V, REM, Ca and Mg when necessary, wherein DI* (DI* = 33.85 × (0.1×C) 0.5 × (0.7×Si+1) × (3.33×Mn+1) × (0.35×Cu+1) × (0.36×Ni+1) × (2.16×Cr+1) × (3×Mo+1) × (1.75×V+1) × (1.5×W+1)) is 45 to 180, C+Mn/4-Cr/3+10P‰¤0.47, and a base phase of the microstructure is formed of martensite.

公开(公告)号：EP2692890A4

公开(公告)日：2014-12-03

申请号：EP12765557

申请日：2012-03-28

申请人： JFE STEEL CORP

发明人： UEDA KEIJI ,  MUROTA YASUHIRO ,  ISHIKAWA NOBUYUKI

IPC分类号： C22C38/00 ,  C21D8/02 ,  C22C38/32 ,  C22C38/54

CPC分类号： C22C38/50 ,  C21D1/25 ,  C21D8/0263 ,  C21D8/0426 ,  C21D8/0463 ,  C21D8/0473 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48

摘要： Provided is an abrasion resistant steel plate or steel sheet, suitable for use in construction machines, industrial machines, and the like, excellent in resistance to stress corrosion cracking and a method for manufacturing the same. A steel plate or steel sheet has a composition containing 0.20% to 0.27% C, 0.05% to 1.0% Si, 0.30% to 0.90% Mn, P, S, 0.005% to 0.025% Nb, 0.008% to 0.020% Ti, 0.1% or less Al, and 0.0010% to 0.0060% N on a mass % basis, the composition further containing one or more of Cr, Mo, W, and B, the composition containing one or more of Cu, Ni, V, an REM, Ca, and Mg as required, the remainder being Fe and inevitable impurities. The steel plate or steel sheet has a DI* of 45 or more and a microstructure having a base phase or main phase that is tempered martensite. Nb/Ti-containing precipitates having a grain size of 0.01 µm to 0.5 µm in terms of equivalent circle diameter is present in the steel plate or steel sheet at 2 × 10 2 grains/mm 2 or more. After being heated, a semi-finished product having the steel composition is hot-rolled and is subjected to reheat-quenching or direct quenching.

摘要翻译： 本发明提供一种耐磨钢板或钢板，适用于建筑机械，工业机械用等的，具有优异的抗应力腐蚀开裂和用于制造其的方法。 钢板或钢板具有含有0.20％至〜12的组合物：27％C，0.05％至1.0％的Si，0.30％至0.90％的Mn，P，S，0.005％至0.025％的Nb，0.008％至0.020％的Ti，0.1 以质量％计上％以下的Al，和0.0010％〜0.0060％N，所述组合物还含有一种或多种铬，钼，W，和B，含有一个或多个铜，镍，V，REM的组合物的 ，Ca和Mg作为需要，余量由Fe和不可避免的杂质。 钢板或钢板具有45或更大的DI *和具有基座相的微结构或主相也被回火马氏体。 /含Ti具有0点01微米的晶粒度为0.5微米的Nb的析出物在当量圆直径计存在于钢板或钢板在2×10 2格令/ mm 2以上。 被加热后，将具有所述钢组合物中的半成品是热轧并进行再加热淬火或直接淬火。