Steel for welded structure and producing method thereof
    7.
    发明授权
    Steel for welded structure and producing method thereof 有权
    焊接结构钢及其制造方法

    公开(公告)号:US08668784B2

    公开(公告)日:2014-03-11

    申请号:US13138119

    申请日:2010-05-18

    IPC分类号: C22C38/08 C22C38/14 C21D8/00

    摘要: A steel for a welded structure includes the following composition: by mass %, C at a C content [C] of 0.015 to 0.045%; Si at a Si content [Si] of 0.05 to 0.20%; Mn at a Mn content [Mn] of 1.5 to 2.0%; Ni at a Ni content [Ni] of 0.10 to 1.50%; Ti at a Ti content [Ti] of 0.005 to 0.015%; O at an O content [O] of 0.0015 to 0.0035%; and N at a N content [N] of 0.002 to 0.006%, and a balance composed of Fe and unavoidable impurities. In the steel for a welded structure, the P content [P] is limited to 0.008% or less, the S content [S] is limited to 0.005% or less, the Al content [Al] is limited to 0.004% or less, the Nb content [Nb] is limited to 0.005% or less, the Cu content [Cu] is limited to 0.24% or less, the V content [V] is limited to 0.020% or less, and a steel composition parameter PCTOD is 0.065% or less, and a steel composition hardness parameter CeqH is 0.235% or less.

    摘要翻译: 用于焊接结构的钢包括以质量%计的C含量[C]为C = 0.015〜0.045%的组成: Si含量[Si]为0.05〜0.20%的Si; Mn含量[Mn]为1.5〜2.0%的Mn; Ni量[Ni]为0.10〜1.50%的Ni; Ti含量[Ti]为0.005〜0.015%的Ti; O的含量[O]为0.0015〜0.0035%; N为N,0.002〜0.006%,余量由Fe和不可避免的杂质构成。 在焊接结构钢中,P含量[P]限制在0.008%以下,S含量[S]限制在0.005%以下,Al含量[Al]限定在0.004%以下, 将Nb含量[Nb]限制在0.005%以下,将Cu含量[Cu]限制在0.24%以下,将V含量[V]限制在0.020%以下,钢结构参数PCTOD为0.065 %以下,钢组合物硬度参数CeqH为0.235%以下。

    Method of production of steel for welded structures excellent in low temperature toughness of weld heat affected zone
    8.
    发明授权
    Method of production of steel for welded structures excellent in low temperature toughness of weld heat affected zone 有权
    用于焊接结构的钢的生产方法焊接热影响区的低温韧性优异

    公开(公告)号:US07857917B2

    公开(公告)日:2010-12-28

    申请号:US11632735

    申请日:2005-07-21

    IPC分类号: C21D8/02

    摘要: The present invention provides a high strength thick steel plate for marine structures superior in weldability and low temperature toughness of the HAZ, which is able to be produced at a low cost without use of a complicated method of production, and a method of production of the same, that is, steel for welded structures excellent in low temperature toughness of the weld heat affected zone and a method of production of the same characterized by casting molten steel containing, by mass %, C: 0.03 to 0.12%, Si: 0.05 to 0.30%, Mn: 1.2 to 3.0%, P: 0.015% or less, S: 0.001 to 0.015%, Cu+Ni: 0.10% or less, Al: 0.001 to 0.050%, Ti: 0.005 to 0.030%, Nb: 0.005 to 0.10%, and N: 0.0025 to 0.0060% by the continuous casting method, making the cooling rate from near the solidification point to 800° C. in the secondary cooling at that time 0.06 to 0.6° C./s, hot rolling the obtained slab, and cooling it from a temperature of 800° C. or more.

    摘要翻译: 本发明提供了一种用于HAZ的焊接性和低温韧性优异的船用结构的高强度厚钢板,其能够在不使用复杂的生产方法的情况下以低成本制造,以及制造方法 相同的是,焊接热影响区的低温韧性优异的焊接结构用钢及其制造方法,其特征在于,以质量%计含有C:0.03〜0.12%Si:0.05〜 0.30%,Mn:1.2〜3.0%,P:0.015%以下,S:0.001〜0.015%,Cu + Ni:0.10%以下,Al:0.001〜0.050%,Ti:0.005〜0.030%,Nb:0.005 至0.10%,N:0.0025〜0.0060%,使二次冷却时的冷却速度接近凝固点至800℃,时间为0.06〜0.6℃/秒,热轧 并从800℃以上的温度进行冷却。

    STEEL SUPERIOR IN CTOD PROPERTIES OF WELD HEAT-AFFECTED ZONE AND METHOD OF PRODUCTION OF SAME
    9.
    发明申请
    STEEL SUPERIOR IN CTOD PROPERTIES OF WELD HEAT-AFFECTED ZONE AND METHOD OF PRODUCTION OF SAME 有权
    焊接热影响区CTOD特性中的钢铁及其生产方法

    公开(公告)号:US20100008815A1

    公开(公告)日:2010-01-14

    申请号:US12448582

    申请日:2008-12-04

    IPC分类号: C22C38/16 B22D11/00

    摘要: The present invention provides high strength steel having unprecedentedly superior CTOD (fracture toughness) properties satisfying not only the CTOD properties of the FL zone at −60° C., but also the CTOD properties of the ICHAZ zone in small and medium heat input multilayer welding etc. and a method of production of the same.The steel of the present invention is steel superior in CTOD properties of the heat-affected zone containing, by mass %, C: 0.015 to 0.045%, Si: 0.05 to 0.2%, Mn: 1.5 to 2.0%, Cu: 0.25 to 0.5%, Ni: 0.7 to 1.5%, P: 0.008% or less, S: 0.005% or less, Al: 0.004% or less, Ti: 0.005 to 0.015%, Nb: 0.005% or less, 0: 0.0015 to 0.0035%, and N: 0.002 to 0.006%, PCTOD: 0.065 or less, CeqH: 0.235 or less and the balance consisting of Fe and unavoidable impurities.

    摘要翻译: 本发明提供了具有前所未有的优异的CTOD(断裂韧性)性能的高强度钢,其不仅满足-60℃下FL区域的CTOD性能,而且满足中小型热输入多层焊接中ICHAZ区域的CTOD特性 等等及其生产方法。 本发明的钢是热影响区的CTOD特性优异的钢,以质量%计含有C:0.015〜0.045%,Si:0.05〜0.2%,Mn:1.5〜2.0%,Cu:0.25〜0.5 %,Ni:0.7〜1.5%,P:0.008%以下,S:0.005%以下,Al:0.004%以下,Ti:0.005〜0.015%,Nb:0.005%以下,0:0.0015〜0.0035% ,N:0.002〜0.006%,PCTOD:0.065以下,CeqH:0.235以下,余量由Fe和不可避免的杂质构成。

    Steel For Welded Structures Excellent In Low Temperature Toughness Of Weld Heat Affected Zone And Method Of Production Of Same
    10.
    发明申请
    Steel For Welded Structures Excellent In Low Temperature Toughness Of Weld Heat Affected Zone And Method Of Production Of Same 有权
    焊接结构钢焊接热影响区的低温韧性优良,生产方法优良

    公开(公告)号:US20070193664A1

    公开(公告)日:2007-08-23

    申请号:US11632735

    申请日:2005-07-21

    IPC分类号: C22C38/14

    摘要: The present invention provides a high strength thick steel plate for marine structures superior in weldability and low temperature toughness of the HAZ, which is able to be produced at a low cost without use of a complicated method of production, and a method of production of the same, that is, steel for welded structures excellent in low temperature toughness of the weld heat affected zone and a method of production of the same characterized by casting molten steel containing, by mass%, C: 0.03 to 0.12%, Si: 0.05 to 0.30%, Mn: 1.2 to 3.0%, P: 0.015% or less, S: 0.001 to 0.015%, Cu+Ni: 0.10% or less, Al: 0.001 to 0.050%, Ti: 0.005 to 0.030%, Nb: 0.005 to 0.10%, and N: 0.0025 to 0.0060% by the continuous casting method, making the cooling rate from near the solidification point to 800° C. in the secondary cooling at that time 0.06 to 0.6° C./s, hot rolling the obtained slab, and cooling it from a temperature of 800° C. or more.

    摘要翻译: 本发明提供了一种用于HAZ的焊接性和低温韧性优异的船用结构的高强度厚钢板,其能够在不使用复杂的生产方法的情况下以低成本制造,以及制造方法 相同的是,焊接热影响区的低温韧性优异的焊接结构用钢及其制造方法,其特征在于,以质量%计含有C:0.03〜0.12%Si:0.05〜 0.30%,Mn:1.2〜3.0%,P:0.015%以下,S:0.001〜0.015%,Cu + Ni:0.10%以下,Al:0.001〜0.050%,Ti:0.005〜0.030%,Nb:0.005 至0.10%,N:0.0025〜0.0060%,使二次冷却时的冷却速度接近凝固点至800℃,时间为0.06〜0.6℃/秒,热轧 并从800℃以上的温度进行冷却。