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| Research on the Performances of U77 MnCr Used for Heavy—haul Railway |
| LIU Feng—shou，ZHOU Qing—yue，ZHANG Yin—hua，CHEN Zhao—yang |
| China Academy of Railway Sciences，Beijing 100081，China； |
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Abstract Research purposes: The heavy—haul railway of foreign countries has successfully used the low—alloy rails containing Cr．but there was no application of low—alloy rails containing Cr in Chinese heavy haul railway in tIIe past．The parent metals and welding of U77 MnCr rail as well as the application of U77 MnCr rail ale studied in this paper．
Research conclusions: The parent metals of U77 MnCr rail is suitable for being used in the straight section of heavy—haul railway because of its high purity and good strength—toughness，has a perfect cost performance because it only contains the cheap chrome alloy of 0．25％一0．40％with good elasticity and does not contain the treasure vanadium alloy，has a good welding performance with self—harden ability of welding joints，SO it does not need air cooling after normalizing and the toughness of the rail top surface matches the toughness of the parent mental，and has a good fatigue resistance that can prolong the service life of the rail on heavy—haul railway．
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Received: 07 February 2009
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[1] 周清跃,等.国内外钢轨钢研究及进展[J].中国铁道科 学, 2002, 23(6): 120 -126.
[2] 候玉碧.重载铁路钢轨伤损形成分析及对策[J].铁道 建筑技术, 2007,增刊: 26 -34.
[3] 贾国平.论高速重载铁路运输对钢轨的技术要求[J]. 中国冶金, 2000(6): 26 -31.
[4] 王志平.重载快速大运量干线60 kg /m钢轨接头波形磨 耗成因分析及防治对策[J].铁道标准设计, 2005, (10): 7 -10.
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2009, Vol. 26 
