发明公开
- 专利标题: METHOD OF MAKING HIGH STRENGTH STEEL CRANE RAIL
- 专利标题(中): 一种用于生产起重机轨道由高强度钢
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申请号: EP13855497.7申请日: 2013-11-15
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公开(公告)号: EP2920328A1公开(公告)日: 2015-09-23
- 发明人: BRAMFITT, Bruce , FLETCHER, Frederick , MCCULLOUGH, Jason , MUSCARELLA, Michael , NELSON, John
- 申请人: Arcelormittal Investigación y Desarrollo SL
- 申请人地址: CL/Chavarri, 6 48910 Sestao, Bizkaia ES
- 专利权人: Arcelormittal Investigación y Desarrollo SL
- 当前专利权人: Arcelormittal Investigación y Desarrollo SL
- 当前专利权人地址: CL/Chavarri, 6 48910 Sestao, Bizkaia ES
- 代理机构: Blot, Philippe Robert Emile
- 优先权: US201261726945P 20121115
- 国际公布: WO2014078746 20140522
- 主分类号: C21D9/04
- IPC分类号: C21D9/04 ; C21D1/667
摘要:
A method of making a high strength head-hardened crane rail and the crane rail produced by the method. The method comprises the steps of providing a steel rail having a composition comprising, in weight percent: C 0.79 - 1.00%; Mn 0.40 - 1.00; Si 0.30 - 1.00; Cr 0.20 - 1.00; V 0.05 - 0.35; Ti 0.01 - 0.035; N 0.002 to 0.0150; and the remainder being predominantly iron. The steel rail is cooled from a temperature between about 700 and 800 °C at a cooling rate having an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 800 °C), (40 s, 700 °C), and (140 s, 600 °C) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 700 °C), (40 s, 600 °C), and (140 s, 500 °C).
公开/授权文献
- EP2920328B1 METHOD OF MAKING HIGH STRENGTH STEEL CRANE RAIL 公开/授权日:2021-01-27
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