STEEL FOR NITRIDING AND NITRIDED PART
    22.
    发明申请
    STEEL FOR NITRIDING AND NITRIDED PART 有权
    用于硝化和硝化部分的钢

    公开(公告)号:US20130087250A1

    公开(公告)日:2013-04-11

    申请号:US13702285

    申请日:2011-11-17

    摘要: The present invention provides a steel for nitriding with a composition including, by mass %: C: 0.10% to 0.20%; Si: 0.01% to 0.7%; Mn: 0.2% to 2.0%; Cr: 0.2% to 2.5%; Al: 0.01% to less than 0.19%; V: over 0.2% to 1.0%; Mo: 0% to 0.54%; N: 0.001% to 0.01%; P limited to not more than 0.05%; S limited to not less than 0.2%; and a balance including Fe and inevitable impurities, the composition satisfying 2≦[V]/[C]≦10, where [V] is an amount of V by mass % and [C] is an amount of C by mass %, in which the steel for nitriding has a microstructure containing bainite of 50% or more in terms of an area percentage.

    摘要翻译: 本发明提供一种氮化组成的钢,其含有质量%:C:0.10〜0.20% Si:0.01〜0.7% Mn:0.2〜2.0% Cr:0.2〜2.5% Al:0.01%〜小于0.19%; V:超过0.2%至1.0%; Mo:0〜0.54% N:0.001〜0.01% P限制在不超过0.05%; S限制在0.2%以上; 余量包括Fe和不可避免的杂质,组成满足2≦̸ [V] / [C]≦̸ 10,其中[V]为质量%V,[C]为质量% 其中用于氮化的钢具有以面积百分比计含有贝氏体为50%以上的微结构。

    STRAND FOR SAW WIRE AND MANUFACTURING METHOD THEREOF
    23.
    发明申请
    STRAND FOR SAW WIRE AND MANUFACTURING METHOD THEREOF 审中-公开
    钢丝绳及其制造方法

    公开(公告)号:US20120318410A1

    公开(公告)日:2012-12-20

    申请号:US13581494

    申请日:2011-04-07

    摘要: Regarding contents of C, Si, Mn and Cr, a value of parameter P represented by the following (equation 1) is 1000 or more. A metallic structure contains wire-drawn pearlite in an area ratio of 98% or more, a diameter is 0.05 mm to 0.18 mm, a tensile strength is 4000 MPa or more, and a twist number in a twist test in which a grip-to-grip distance is 100 mm, and a tension equal to a tensile strength×a cross-sectional area of wire×0.5 is applied, is 5 or more. P=1098×[C]+98×[Si]−20×[Mn]+167×[Cr]  (equation 1) (in the (equation 1), [C], [Si], [Mn] and [Cr] indicate contents (mass %) of C, Si, Mn and Cr, respectively.)

    摘要翻译: 关于C,Si,Mn和Cr的含量,由以下(式1)表示的参数P的值为1000以上。 金属结构体包含线状珠光体,面积率为98%以上,直径为0.05mm〜0.18mm,拉伸强度为4000MPa以上,扭曲试验中的捻度为 夹持距离为100mm,施加等于拉伸强度×导线横截面积×0.5的张力为5以上。 (式(1),[C],[Si],[Mn]和[C]中的P = 1098×[C] +98×[Si] -20×[Mn] Cr]分别表示C,Si,Mn,Cr的含量(质量%))

    HIGH STRENGTH STEEL MATERIAL AND HIGH STRENGTH BOLT EXCELLENT IN DELAYED FRACTURE RESISTANCE AND METHODS OF PRODUCTION OF SAME
    24.
    发明申请
    HIGH STRENGTH STEEL MATERIAL AND HIGH STRENGTH BOLT EXCELLENT IN DELAYED FRACTURE RESISTANCE AND METHODS OF PRODUCTION OF SAME 审中-公开
    高强度钢材和高强度螺栓在延迟断裂韧性方面的优势及其生产方法

    公开(公告)号:US20120247618A1

    公开(公告)日:2012-10-04

    申请号:US13515444

    申请日:2011-03-11

    IPC分类号: C23C8/26

    摘要: A high strength steel material which is excellent in delayed fracture resistance containing, by mass %, C: 0.10 to 0.55%, Si: 0.01 to 3%, and Mn: 0.1 to 2%, further containing one or both of V: 1.5% or less and Mo: 3.0% or less, the contents of V and Mo satisfying V+1/2Mo>0.4%, further containing one or more of Cr: 0.05 to 1.5%, Nb: 0.001 to 0.05%, Cu: 0.01 to 4%, Ni: 0.01 to 4%, and B: 0.0001 to 0.005%, and having a balance of Fe and unavoidable impurities, the structure being a mainly tempered martensite structure, the surface of the steel material being formed with (a) a nitrided layer having a thickness from the surface of the steel material of 200 μm or more and a nitrogen concentration of 12.0 mass % or less and higher than the nitrogen concentration of the steel material by 0.02 mass % or more and (b) a low carbon region having a depth from the surface of the steel material of 100 μm or more to 1000 μm or less and having a carbon concentration of 0.05 mass % or more and 0.9 time or less the carbon concentration of the steel material.

    摘要翻译: 一种耐延迟断裂性优异的高强度钢材,以质量%计含有C:0.10〜0.55%,Si:0.01〜3%,Mn:0.1〜2%,进一步含有V:1.5% 以下,Mo:3.0%以下,V和Mo的含量满足V + 1 / 2Mo> 0.4%,进一步含有Cr:0.05〜1.5%,Nb:0.001〜0.05%,Cu:0.01〜 4%,Ni:0.01〜4%,B:0.0001〜0.005%,余量为Fe和不可避免的杂质,其结构为主要是回火马氏体组织,钢材表面形成有(a) 氮化层的钢板表面的厚度为200μm以上,氮浓度为12.0质量%以下,高于钢材的氮浓度为0.02质量%以上,(b)低碳 具有从钢材表面的深度为100μm以上至1000μm以下且碳浓度为0.05质量%以上且0.9t以下的区域 ime或更少的钢材料的碳浓度。