High toughness abrasion resistant steel with little change in hardness during use and method of production of same
    1.
    发明授权
    High toughness abrasion resistant steel with little change in hardness during use and method of production of same 有权
    使用时硬度变化小的高韧性耐磨钢及其制造方法

    公开(公告)号:US08097099B2

    公开(公告)日:2012-01-17

    申请号:US11991592

    申请日:2006-08-18

    IPC分类号: C22C38/22 C22C38/54

    摘要: The present invention provides an abrasion resistant steel having a hardness of HB400 to HB520, having little change of hardness during long term use, and superior in toughness, characterized by containing, by mass %, C: 0.21% to 0.30%, Si: 0.30 to 1.00%, Mn: 0.32 to 0.70%, P: 0.02% or less, S: 0.01% or less, Cr: 0.1 to 2.0%, Mo: 0.1 to 1.0%, B: 0.0003 to 0.0030%, Al: 0.01 to 0.1%, and N: 0.01% or less, further containing one or more of V: 0.01 to 0.1%, Nb: 0.005 to 0.05%, Ti: 0.005 to 0.03%, Ca: 0.0005 to 0.05%, Mg: 0.0005 to 0.05%, and REM: 0.001 to 0.1%, having a balance of Fe, and furthermore having an ingredient with an M value defined by the following formula (1) of −10 to 16: M=26×[Si]−40×[Mn]−3×[Cr]+36×[Mo]+63×[V]  (1)

    摘要翻译: 本发明提供硬度为HB400〜HB520的耐磨钢,长期使用时的硬度变化小,韧性优异,其特征在于以质量%计含有C:0.21〜0.30%的Si:0.30 至1.00%,Mn:0.32〜0.70%,P:0.02%以下,S:0.01%以下,Cr:0.1〜2.0%,Mo:0.1〜1.0%,B:0.0003〜0.0030%,Al:0.01〜 0.1%,N:0.01%以下,进一步含有V:0.01〜0.1%,Nb:0.005〜0.05%,Ti:0.005〜0.03%,Ca:0.0005〜0.05%,Mg:0.0005〜0.05 %和REM:0.001至0.1%,余量为Fe,并且还具有由下式(1)定义的M值为-10至16的成分:M = 26×[Si] -40×[ Mn] -3×[Cr] +36×[Mo] + 63×[V](1)

    Welded joint of high fatigue strength
    2.
    发明授权
    Welded joint of high fatigue strength 失效
    焊接接头疲劳强度高

    公开(公告)号:US5964964A

    公开(公告)日:1999-10-12

    申请号:US930295

    申请日:1997-10-03

    IPC分类号: C22C38/02 C22C38/04 C22C38/06

    CPC分类号: C22C38/02 C22C38/04 C22C38/06

    摘要: A propagation speed of a fatigue crack in a HAZ is restricted, and a fatigue strength of an as-welded joint can be improved, by limiting an area ratio of a ferrite micro-structure in the HAZ of the welded joint to 20 to 100% and the balance to one of a bainite, a martensite, a pearlite and a residual austenite micro-structure, or limiting a carbon equivalent of a steel plate used for the welded joint to not greater than 0.275.

    摘要翻译: PCT No.PCT / JP96 / 02308 Sec。 371日期1997年10月3日第 102(e)日期1997年10月3日PCT PCT 1996年8月16日PCT公布。 公开号WO97 / 30184 日期1997年8月21日HAZ中的疲劳裂纹的传播速度受到限制,通过限制焊接接头的HAZ中的铁素体微结构的面积比,能够提高焊接接头的疲劳强度 20〜100%,余量为贝氏体,马氏体,珠光体和残留奥氏体微结构之一,或将焊接接头用钢板的碳当量限制在0.275以下。

    High tensile steel having excellent fatigue strength at its weld and
weldability and process for producing the same
    3.
    发明授权
    High tensile steel having excellent fatigue strength at its weld and weldability and process for producing the same 失效
    高强度焊接钢板在其焊接和焊接性方面具有优异的疲劳强度,以及其制造方法

    公开(公告)号:US5634988A

    公开(公告)日:1997-06-03

    申请号:US411738

    申请日:1995-04-04

    摘要: The present invention relates to a high tensile welded steel plate consisting essentially of, by weight, C: 0.03 to 0.20%, Si: 0.6 to 2.0%, Mn: 0.6 to 2.0%, Al: 0.01 to 0.08%, B: not more than 0.0020%, and N: 0.002 to 0.008% and optionally at least one element selected from Cu, Mo, Ni, Cr, Nb, V, Ti, Ca, and REM with the balance consisting of Fe and unavoidable impurities, and a process for producing a high tensile welded steel plate, usually comprising the steps of: subjecting a slab comprising the above chemical compositions to hot rolling or alternatively hot rolling followed by controlled rolling. The present invention enables fatigue cracking of the as-welded steel, in its heat-affected zone, to be prevented and, at the same time, the propagation of the crack to be prevented or inhibited.

    摘要翻译: PCT No.PCT / JP94 / 01297 Sec。 371日期:1995年4月4日 102(e)1995年4月4日PCT PCT 1994年8月4日PCT公布。 公开号WO95 / 04838 日本特开2005年02月16日本发明涉及一种高强度焊接钢板,其基本上由C:0.03〜0.20%,Si:0.6〜2.0%,Mn:0.6〜2.0%,Al:0.01〜0.08% ,B:0.0020%以下,N:0.002〜0.008%,以及选自Cu,Mo,Ni,Cr,Nb,V,Ti,Ca和REM中的至少一种元素,余量由Fe和不可避免的 杂质和高强度焊接钢板的制造方法,通常包括以下步骤:对包含上述化学组成的板坯进行热轧或热轧,然后进行受控轧制。 本发明能够防止在其热影响区域中的焊接钢的疲劳裂纹,同时防止或抑制裂纹的传播。