Low-chromium stainless steel excellent in corrosion resistance of weld
    1.
    发明授权
    Low-chromium stainless steel excellent in corrosion resistance of weld 有权
    低铬不锈钢焊接耐腐蚀性优良

    公开(公告)号:US08900380B2

    公开(公告)日:2014-12-02

    申请号:US13580850

    申请日:2011-02-21

    摘要: The present invention provides an optimum low-chromium stainless steel which prevents corrosion resistance degradation of a weld in the case of welding a low-chromium stainless steel utilizing martensite transformation in multiple passes (multipass), is excellent in weld intergranular corrosion resistance even in a severe corrosion environment, simultaneously avoids occurrence of preferential corrosion at the bond-bordering region of the weld heat-affected zone, and is also excellent in productivity, which low-chromium stainless steel comprises, in mass %, C: 0.015 to 0.025%, N: 0.008 to 0.014%, Si: 0.2 to 1.0%, Mn: 1.0 to 1.5%, P: 0.04% or less, S: 0.03% or less, Cr: 10 to 13%, Ni 0.2 to 1.5%, and Al: 0.005 to 0.1% or less, and further comprises Ti: 6×(C %+N %) or greater and 0.25% or less, the balance being Fe and unavoidable impurities, and the contents of the elements satisfy specified expressions.

    摘要翻译: 本发明提供一种最佳的低铬不锈钢,其在多次通过马氏体相变(多次)焊接低铬不锈钢的情况下,防止焊缝的耐腐蚀性降低,即使在焊接中也具有良好的耐晶间腐蚀性 严重的腐蚀环境,同时避免在焊接热影响区的接合界面处发生优先腐蚀,并且生产率也优异,低铬不锈钢以质量%计含有C:0.015〜0.025%, N:0.008〜0.014%,Si:0.2〜1.0%,Mn:1.0〜1.5%,P:0.04%以下,S:0.03%以下,Cr:10〜13%,Ni:0.2〜1.5% :0.005〜0.1%以下,进一步含有Ti:6×(C%+ N%)以上且0.25%以下,余量为Fe和不可避免的杂质,元素含量满足规定的表达式。

    Low chromium stainless steel superior in corrosion resistance of multipass welded heat affected zones and its method of production
    2.
    发明授权
    Low chromium stainless steel superior in corrosion resistance of multipass welded heat affected zones and its method of production 有权
    多层焊接热影响区的耐腐蚀性优良的低铬不锈钢及其生产方法

    公开(公告)号:US07883663B2

    公开(公告)日:2011-02-08

    申请号:US12084182

    申请日:2007-07-03

    IPC分类号: C22C38/28 C22C38/18 C22C38/00

    摘要: The present invention provides optimal low chromium stainless steel preventing the deterioration in corrosion resistance at the weld zone in the case of multipass welding, superior in grain boundary corrosion resistance of the weld zone even in a harsh corrosive environment, simultaneously free from preferential corrosion at the heat affected zones near weld fusion lines, and further superior in manufacturability, that is, low chromium stainless steel containing, by mass %, C: 0.03% or less, N: 0.004 to 0.02%, Si: 0.2 to 1%, Mn: over 1.5 to 2.5%, P: 0.04% or less, S: 0.03% or less, Cr: 10 to 15%, Ni: 0.2 to 3.0%, and Al: 0.005 to 0.1%, further containing Ti: 4×(C %+N %) to 0.35%, and having a balance of Fe and unavoidable impurities, having a γp(%) expressed by a predetermined formula satisfying 80 or more, and satisfying Ti %×N %

    摘要翻译: 本发明提供了最佳的低铬不锈钢,防止在多次焊接的情况下焊接区的耐腐蚀性劣化,即使在苛刻的腐蚀性环境下,焊接区的晶界耐腐蚀性优异,同时也不会在 焊接熔合线附近的受热影响区域,制造性更优异的低铬不锈钢,以质量%计含有C:0.03%以下,N:0.004〜0.02%,Si:0.2〜1%,Mn: 超过1.5〜2.5%,P:0.04%以下,S:0.03%以下,Cr:10〜15%,Ni:0.2〜3.0%,Al:0.005〜0.1%,还含有Ti:4×(C %+ N%)至0.35%,余量为Fe和不可避免的杂质,具有由满足80以上的规定的式表示的γp(%),并满足Ti%×N%<0.004。

    LOW-CHROMIUM STAINLESS STEEL EXCELLENT IN CORROSION RESISTANCE OF WELD
    3.
    发明申请
    LOW-CHROMIUM STAINLESS STEEL EXCELLENT IN CORROSION RESISTANCE OF WELD 有权
    低铬不锈钢在焊接耐腐蚀性方面优秀

    公开(公告)号:US20120328466A1

    公开(公告)日:2012-12-27

    申请号:US13580850

    申请日:2011-02-21

    IPC分类号: C22C38/50 C22C38/44 C22C38/42

    摘要: The present invention provides an optimum low-chromium stainless steel which prevents corrosion resistance degradation of a weld in the case of welding a low-chromium stainless steel utilizing martensite transformation in multiple passes (multipass), is excellent in weld intergranular corrosion resistance even in a severe corrosion environment, simultaneously avoids occurrence of preferential corrosion at the bond-bordering region of the weld heat-affected zone, and is also excellent in productivity, which low-chromium stainless steel comprises, in mass %, C: 0.015 to 0.025%, N: 0.008 to 0.014%, Si: 0.2 to 1.0%, Mn: 1.0 to 1.5%, P: 0.04% or less, S: 0.03% or less, Cr: 10 to 13%, Ni 0.2 to 1.5%, and Al: 0.005 to 0.1% or less, and further comprises Ti: 6×(C %+N %) or greater and 0.25% or less, the balance being Fe and unavoidable impurities, and the contents of the elements satisfy specified expressions.

    摘要翻译: 本发明提供一种最佳的低铬不锈钢,其在多次通过马氏体相变(多次)焊接低铬不锈钢的情况下,防止焊缝的耐腐蚀性降低,即使在焊接中也具有良好的耐晶间腐蚀性 严重的腐蚀环境,同时避免在焊接热影响区的接合界面处发生优先腐蚀,并且生产率也优异,低铬不锈钢以质量%计含有C:0.015〜0.025%, N:0.008〜0.014%,Si:0.2〜1.0%,Mn:1.0〜1.5%,P:0.04%以下,S:0.03%以下,Cr:10〜13%,Ni:0.2〜1.5% :0.005〜0.1%以下,进一步含有Ti:6×(C%+ N%)以上且0.25%以下,余量为Fe和不可避免的杂质,元素含量满足规定的表达式。

    Low Chromium Stainless Steel Superior in Corrosion Resistance of Multipass Welded Heat Affected Zones and Its Method of Production
    4.
    发明申请
    Low Chromium Stainless Steel Superior in Corrosion Resistance of Multipass Welded Heat Affected Zones and Its Method of Production 有权
    低铬不锈钢耐多层焊接热影响区的耐腐蚀性及其生产方法

    公开(公告)号:US20090098009A1

    公开(公告)日:2009-04-16

    申请号:US12084182

    申请日:2007-07-03

    摘要: The present invention provides optimal low chromium stainless steel preventing the deterioration in corrosion resistance at the weld zone in the case of multipass welding, superior in grain boundary corrosion resistance of the weld zone even in a harsh corrosive environment, simultaneously free from preferential corrosion at the heat affected zones near weld fusion lines, and further superior in manufacturability, that is, low chromium stainless steel containing, by mass %, C: 0.03% or less, N: 0.004 to 0.02%, Si: 0.2 to 1%, Mn: over 1.5 to 2.5%, P: 0.04% or less, S: 0.03% or less, Cr: 10 to 15%, Ni: 0.2 to 3.0%, and Al: 0.005 to 0.1%, further containing Ti: 4×(C %+N %) to 0.35%, and having a balance of Fe and unavoidable impurities, having a γp(%) expressed by a predetermined formula satisfying 80 or more, and satisfying Ti %×N %

    摘要翻译: 本发明提供了最佳的低铬不锈钢,防止在多次焊接的情况下焊接区的耐腐蚀性劣化,即使在苛刻的腐蚀性环境下,焊接区的晶界耐腐蚀性优异,同时也不会在 焊接熔合线附近的受热影响区域,制造性更优异的低铬不锈钢,以质量%计含有C:0.03%以下,N:0.004〜0.02%,Si:0.2〜1%,Mn: 超过1.5〜2.5%,P:0.04%以下,S:0.03%以下,Cr:10〜15%,Ni:0.2〜3.0%,Al:0.005〜0.1% + N%)〜0.35%,余量为Fe和不可避免的杂质,具有由满足80以上的规定的式表示的gammap(%),并满足Ti%xN%<0.004。

    DUAL-PHASE STRUCTURE STAINLESS STEEL SHEET AND STEEL STRIP AND METHOD OF PRODUCTION OF THESE
    7.
    发明申请
    DUAL-PHASE STRUCTURE STAINLESS STEEL SHEET AND STEEL STRIP AND METHOD OF PRODUCTION OF THESE 有权
    双相结构不锈钢板和钢带及其生产方法

    公开(公告)号:US20130014864A1

    公开(公告)日:2013-01-17

    申请号:US13637690

    申请日:2011-03-29

    摘要: High strength dual-phase structure stainless steel sheet and steel strip which are excellent in corrosion resistance, the dual-phase structure stainless steel sheet and steel strip having a Vicker's hardness of 200 HV or more and characterized by containing, by mass %, C: 0.02 to 0.20%, Si: 0.10 to 2.0%, Mn: 0.20 to 2.0%, P: 0.040% or less, S: 0.010% or less, Cr: 15.0 to 18.0%, Ni: 0.5 to 4.0%, Sn: 0.05 to 0.50, and N: 0.010 to 0.10%, having a γp of 60 to 95 in range, having a balance of substantially Fe, and having a ferrite and martensite dual-phase structure formed by being heated to the ferrite and austenite dual-phase region, then the austenite phase transforming to martenite in the subsequent cooling process, where γp=420C+470N+23Ni+7Mn+9Cu−11.5Cr−11.5Si−12Mo−7Sn−49Ti−47Nb−52Al+189.

    摘要翻译: 具有优异耐腐蚀性的高强度双相结构不锈钢板和钢带,具有200VV以上的维氏硬度的双相结构的不锈钢板和钢带,其特征在于以质量%计含有C: 0.02〜0.20%,Si:0.10〜2.0%,Mn:0.20〜2.0%,P:0.040%以下,S:0.010%以下,Cr:15.0〜18.0%,Ni:0.5〜4.0%,Sn:0.05 至0.50,N:0.010〜0.10%,γp为60〜95的范围,余量基本上为Fe,并且具有通过加热到铁素体和奥氏体双相而形成的铁素体和马氏体双相结构 然后在随后的冷却过程中奥氏体相转变成马氏体,其中γp= 420℃+ 470N + 23Ni + 7Mn + 9Cu-11.5Cr-11.5Si-12Mo-7Sn-49Ti-47Nb-52Al + 189。