共查询到20条相似文献,搜索用时 31 毫秒
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中国加快了高速铁路建设,铁路建设需要大量的钢轨,为了把握住铁路大发展、重轨销售形势良好的时机,提高重轨实物质量水平,满足市场对重轨的需求,2007年,包钢将重轨降级品改判为废品,同时针对重轨的主要缺陷采取了有效的控制措施,重轨质量得到提高,扩大了市场份额,产生了较高的经济效益。 相似文献
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主要对“高速铁路钢轨质量评估”项目的总体情况进行综述,介绍高速铁路钢轨技术以及钢轨质量评估内容、方案、结果等,从钢轨母材及道岔钢轨的质量、钢轨焊接接头的质量、中国钢轨理化性能及标准与高速铁路发达国家的对比、钢轨和焊接接头的使用跟踪、高速铁路钢轨微观组织及伤损机制分析、钢轨生产稳定性评价等方面进行评估。结果表明:中国高速铁路钢轨、焊接接头及道岔轨的质量满足相关标准要求;中国高速铁路用钢轨的标准和质量与国外先进国家处于同一水平,满足了中国高速铁路大规模建设的需求;中国高速铁路钢轨性能优良、质量稳定,钢轨技术安全可靠,可保证高速铁路安全运营。 相似文献
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连铸坯轧制钢轨低倍组织特征研究 总被引:2,自引:0,他引:2
本文主要对包钢连铸坯轧制钢轨低倍组织结构作了初步的讨论分析,并与模铸锭轧帛钢轨低倍组织结构进行了比较,此外还简要介绍了自生产以来,连铸坯轧制中易出现的有害缺陷。 相似文献
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叙述了涡流检测法原理和利用涡流法检测钢轨表面缺陷的几种方法;同时介绍了国外几个钢轨生产厂研究开发的涡流检测装置。 相似文献
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介绍了百米高速重轨CCS万能轧机中钢轨横移及定尺切断装置设计的问题,然后对百米重轨CCS万能轧机后钢轨横移及定尺切断装置的设备组成、功能及布置进行了全面说明,并重点介绍钢轨及型钢分段工艺流程;最后阐述了百米重轨CCS万能轧机后钢轨横移及定尺切断装置对百米重轨及型钢生产具有重要意义。 相似文献
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法国高速铁路用钢轨的生产技术及国内存在的差距 总被引:4,自引:1,他引:3
介绍了法国高速铁路钢轨的生产技术,包括钢坯的冶炼、钢轨轧制、精整及质量检测以及成品钢轨性能质量特点,同时介绍了目前国内钢轨生产情况以及与之相比存在的差距。 相似文献
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M. Krupina 《Metallurgist》1997,41(9-11):327-330
The intensive use of railroad rails in Russia has drawn attention to the quality of the metal used in the transport industry. The Ministry of Railroads (MPS) has tightened standards for rails with respect to the absence of internal and surface defects, length, and the accuracy of the geometric dimensions. Railroads now have choices in regard to the rails they use, given the broad market for these products. They can now purchase not only Russian rails, but also rails made abroad (preferring the latter for several reasons). 相似文献
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文章分析小半径曲线钢轨侧面磨耗形成的原因,介绍弹性减磨防脱新型护轮轨的工作原理,总结并分析该型护轮轨在包钢小半径曲线上的应用情况。 相似文献
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A. B. Yur’ev 《Metallurgist》2008,52(1-2):83-85
Since 2001, the Novokuznetsk Metallurgical Combine has produced 3.0 million tons of R65 railroad rails of continuous-cast steel made in electric furnaces. The combine has significantly improved all the most important quality indices of the steel during this period, and the service life of the rails has increased from 0.5·109 to (0.8–1)·109 tons gross. The combine has mastered the production of rails with superior cold resistance and rails suited of use in high-speed rail systems. It is beginning production of rails with a bainitic structure and rails made of hypereutectoid steels. All these results have been obtained through the construction of new production facilities and modernization of the combine’s existing equipment. Plans for future rail production include extensive reconstruction of the heat-treatment section of the rail-beam shop and reconstruction of the machine-tool bay, the latter involving replacement of part of the equipment. Arc steelmaking furnace No. 1 and two continuous casters will be rebuilt in the electric steelmaking shop. The ultimate goal is to increase the durability and reliability of the rails so as to put them on par with the best rails in the world. 相似文献
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