公开(公告)号：WO2015151521A8

公开(公告)日：2016-07-07

申请号：PCT/JP2015001870

申请日：2015-03-31

申请人： JFE STEEL CORP

发明人： ICHIMIYA KATSUYUKI ,  YUGA MASAO ,  HASE KAZUKUNI ,  ENDO SHIGERU

IPC分类号： C22C38/00 ,  B23K9/23 ,  B23K35/30 ,  C22C38/14 ,  C22C38/58

CPC分类号： B23K35/3073 ,  B23K9/18 ,  B23K9/23 ,  B23K35/30 ,  B23K2203/04 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/14 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  F16B5/08

摘要： Provided is a weld joint with superior CTOD characteristics produced via: a steel plate, as a base, containing 0.03 - 0.09% C, 0.01 - 0.35% Si, 1.3 - 2.0% Mn, 0.012% or less P, 0.0035% or less S, 0.01 - 0.06% Al, less than 0.3% Ni, less than 0.10% Mo, 0.005 - 0.023% Nb, 0.005 - 0.025% Ti, less than 0.0003% B, 0.002 - 0.005% N, 0.0005- 0.0050% Ca, and 0.0030% or less O, wherein the components satisfy a prescribed relationship; and a weld metal containing 0.040 - 0.090% C, 0.1 - 0.8% Si, 1.0 - 2.5% Mn, 0.020% or less Al, 0.1 - 1.0% Ni, 0.05 - 0.50% Mo, 0.005 - 0.050% Ti, 0.0015% or less B, and the balance iron and inevitable impurities.

摘要翻译： 提供了通过以下方式制造的CTOD特性优异的焊接接头：作为基材的钢板，含有0.03〜0.09％的C，0.01〜0.35％的Si，1.3〜2.0％的Mn，0.012％以下的P，0.0035％以下的S ，0.01〜0.06％的Al，小于0.3％的Ni，小于0.10％的Mo，0.005〜0.023％的Nb，0.005〜0.025％的Ti，小于0.0003％的B，0.002〜0.005％的N，0.0005〜0.0050％的Ca，以及 0.0030％以下的O，其中所述成分满足规定的关系; 含有0.040〜0.090％的C，0.1〜0.8％的Si，1.0〜2.5％的Mn，0.020％以下的Al，0.1〜1.0％的Ni，0.05〜0.50％的Mo，0.005〜0.050％的Ti，0.0015％或 少B，余铁和不可避免的杂质。

公开(公告)号：WO2015162939A8

公开(公告)日：2016-10-06

申请号：PCT/JP2015002244

申请日：2015-04-24

申请人： JFE STEEL CORP

发明人： KITSUYA SHIGEKI ,  ICHIMIYA KATSUYUKI ,  HASE KAZUKUNI ,  ENDO SHIGERU

IPC分类号： C22C38/00 ,  B21B1/26 ,  B21B1/38 ,  B21B3/00 ,  C21D8/02 ,  C22C38/58

CPC分类号： C21D9/46 ,  B21B1/22 ,  B21B1/26 ,  B21B3/00 ,  B21B2001/225 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

摘要： Provided is a steel plate that, despite thickness of 100 mm or greater, has exceptional strength and toughness in the central thickness portion. The present invention is a steel plate having thickness of 100 mm or greater and yield strength of at least 620 MPa, characterized by containing prescribed amounts of C, Si, Mn, P, S, Cr, Ni, Al, N, B, and O, the remainder being Fe and unavoidable impurities; having a component composition the carbon equivalent CeqIIW of which is 0.65 or above; and having a structure in which the maximum value of prior γ grain size, expressed as equivalent circle diameter, in the central thickness portion is 150 μm or smaller, and the total area ratio of martensite and bainite in the central thickness portion is 80% or greater.

摘要翻译： 提供尽管厚度为100mm以上的钢板在中心厚度部分具有优异的强度和韧性。 本发明是厚度为100mm以上，屈服强度为620MPa以上的钢板，其特征在于含有规定量的C，Si，Mn，P，S，Cr，Ni，Al，N，B和 O，其余为Fe和不可避免的杂质; 其碳当量CeqIIW为0.65以上的组分组成; 并且具有这样的结构，其中在中心厚度部分中表示为当量圆直径的先前γ晶粒尺寸的最大值为150μm或更小，并且中心厚度部分中的马氏体和贝氏体的总面积比率为80％或 更大。

公开(公告)号：WO2016079978A8

公开(公告)日：2017-04-20

申请号：PCT/JP2015005726

申请日：2015-11-17

申请人： JFE STEEL CORP

发明人： KURONUMA YOTA ,  OHTSUBO HIROFUMI ,  KITSUYA SHIGEKI ,  ICHIMIYA KATSUYUKI ,  HASE KAZUKUNI

IPC分类号： C22C38/00 ,  B21B1/02 ,  B21B1/38 ,  B21B3/00 ,  B21J1/02 ,  C21D8/02 ,  C22C38/58

CPC分类号： B21B1/02 ,  B21B1/38 ,  B21B3/00 ,  B21J1/02 ,  C21D1/18 ,  C21D6/004 ,  C21D7/13 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/0081 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

摘要： A high tensile strength thick steel plate of excellent strength, elongation and toughness of the mid-thickness part and excellent material homogeneity is provided by: heating a continuously cast slab, the components of which have been adjusted to a prescribed composition, to 1200-1350°C and then hot casting under conditions of temperature: at least 1000°C, strain rate: not more than 3/s, and cumulative rolling reduction: at least 15% using a mold in which the opposing short sides of the mold differ and, when the length of the shorter short side is 1, the length of the longer short side is 1.1-3.0; then allowing the slab to cool to obtain a steel raw material; after heating said steel raw material again to the Ac3 point-1250°C and then performing at least two passes of hot-rolling in which rolling reduction per single pass is at least 4%, allowing the steel to cool to obtain a thick steel plate; and after heating again to the Ac3 point-1050°C and then cooling rapidly to 350°C or less, tempering said thick steel plate at 550-700°C.

摘要翻译： 具有优异的强度，中厚度部分的伸长率和韧性以及优异的材料均匀性的高抗拉强度厚钢板通过以下方式提供：将其成分已经调节至规定组成的连续铸造板坯加热至1200-1350 然后在温度：至少1000℃，应变速率：不超过3 / s，和累积压下量：至少15％的条件下使用模具的相对短边不同的模具进行热铸 当较短短边的长度为1时，较长短边的长度为1.1-3.0; 然后使板坯冷却以获得钢原料; 在将所述钢原料再次加热至Ac3点-1250℃后，进行至少两次热轧，其中每一道次的压下量至少为4％，使钢冷却以获得厚钢板 ; 再次加热至Ac3点-1050℃后，迅速冷却至350℃以下后，在550〜700℃对上述厚钢板进行回火。

公开(公告)号：WO2015088040A8

公开(公告)日：2016-05-06

申请号：PCT/JP2014083321

申请日：2014-12-10

申请人： JFE STEEL CORP

发明人： ICHIMIYA KATSUYUKI ,  KITSUYA SHIGEKI ,  HASE KAZUKUNI ,  ENDO SHIGERU

IPC分类号： C22C38/00 ,  C21D8/02 ,  C22C38/14 ,  C22C38/58

CPC分类号： C21D9/46 ,  C21D8/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/50 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

摘要： The present invention provides a steel plate that contains prescribed steel plate components, B is restricted to less than 0.0003%, and the remainder comprises Fe and unavoidable impurities. The steel plate contains Ti, Nb and Mo in a range in which the quantity of Ti ([Ti]), the quantity of Nb ([Nb]) and the quantity of Mo ([Mo]) satisfies the relationship ([Nb])/([Ti]) + ([Nb]) + ([Mo]) ≥ 0.3, and precipitates have an average particle size of 20 nm or less. A thick steel plate with high tensile strength can thus be obtained, said steel plate: being suitable for use in steel structures such as marine structures, ships, pressure vessels and penstocks; having a yield stress (YS) of at least 460 MPa; and having excellent low-temperature toughness (CTOD characteristics) in multilayer weld zones affected by weld heat and strength and toughness (PWHT characteristics) after being heat treated during welding.

摘要翻译： 本发明提供一种钢板，其含有规定的钢板成分，B被限制在小于0.0003％，余量包含Fe和不可避免的杂质。 该钢板包含Ti（[Ti]），Nb（[Nb]）量和Mo（[Mo]）量满足关系（[Nb]）的范围内的Ti，Nb，Mo， ）/（[Ti]）+（[Nb]）+（[Mo]）≥0.3，析出物的平均粒径为20nm以下。 因此，可以获得具有高拉伸强度的厚钢板，所述钢板适用于海洋结构，船舶，压力容器和钢管等钢结构; 具有至少460MPa的屈服应力（YS）; 在焊接热处理后受焊接热和强度和韧性（PWHT特性）影响的多层焊接区具有优异的低温韧性（CTOD特性）。