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Resistance to rolling contact fatigue damage resistance, part fatigue damaging, bainitic rail and its manufacturing method was superior to the weld joint characteristics

机译：耐滚动接触疲劳破坏性，零件疲劳破坏性，贝氏体钢轨及其制造方法优于焊接接头特性

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摘要

PROBLEM TO BE SOLVED: To provide a bainitic rail in which rolling fatigue damage such as dark spot damage that has been a problem in the present rail steel of pearlitic structure is prevented and the occurrence of internal fatigue damage in a railhead is suppressed, and simultaneously, reduction of hardness in a welded-joint heat-affected zone and also a region thereof are reduced and local wear in a railhead surface part is suppressed.;SOLUTION: The rail has a composition consisting of, by mass, 0.15-0.55% C, 0.10-2.00% Si, 0.20-3.00% Mn, 0.20-3.00% Cr, 0.01-0.30% V, 0.01-0.50% Nb and the balance Fe with inevitable impurities and satisfying V+10×Nb=0.14 to 0.50. Moreover, at least the region within 20 mm from the surface of railhead corners and top part of railhead shows a baintic structure, and further, handness is HV 330 to 500 and the difference in hardness is ≤ HV 50.;COPYRIGHT: (C)2001,JPO

机译：要解决的问题：提供一种贝氏体钢轨，其中可以防止滚动疲劳损伤（例如暗点损伤），该损伤是目前珠光体结构的轨道钢中存在的问题，并且可以抑制在轨头中发生内部疲劳损伤，减少了焊接接头热影响区及其附近区域的硬度降低，并抑制了轨头表面部分的局部磨损。;解决方案：轨的成分以质量计为0.15-0.55％C ，0.10-2.00％Si，0.20-3.00％Mn，0.20-3.00％Cr，0.01-0.30％V，> 0.01-0.50％Nb且余量的Fe具有不可避免的杂质并满足V + 1 0倍; Nb = 0.14至0.50。此外，至少在距轨头拐角的表面和轨头顶部20mm以内的区域显示出贝氏体结构，并且，手感为HV 330至500，硬度差为＆le;。 HV 50 .;版权：（C）2001，日本特许厅

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公开/公告号JP3522613B2

专利类型
公开/公告日2004-04-26

原文格式PDF
申请/专利权人新日本製鐵株式会社;
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申请/专利号JP19990335464
发明设计人上田正治;内野耕一;
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申请日1999-11-26
分类号C22C38/00;C21D9/04;C22C38/38;C22C38/58;
国家 JP
入库时间 2022-08-21 23:24:29

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