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对包钢轨梁厂技术发展的探讨 总被引:1,自引:0,他引:1
本文通过我国钢轨、型钢的市场需求及产品竞争能力分析,阐述了包钢轨梁厂的发展机遇与面临的挑战,认为轨梁厂的技术发展应定位在钢轨专业生产厂,发展重轨品牌战略上.生产精品钢轨,满足国内外铁路发展的需求,塑造强势品牌,参与国内外市场竞争. 相似文献
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简要地介绍了国内外高速铁路发展情况及所使用钢轨的化学成分和性能,从理论和实践上分析了国内客运钢轨暂行技术条件与普通钢轨技术条件的区别。客运专线钢轨要求塑性更高,其A≥10%,w(T.O)≤20×106,夹杂物要求更低,A类夹杂不大于2.0级,B、C、D类夹杂不大于1.0级,客运专线钢轨的总体要求明显高于普通钢轨。从客运钢轨钢的工艺技术和设备的对比分析可知,国内鞍钢、包钢、攀钢、武钢4家钢厂的生产设备已处于世界领先水平,但是由于我国生产高速钢轨的时间还不长,还缺少生产和管理的经验,目前我国钢轨的实物质量与国外先进水平还存在一定差距。 相似文献
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介绍了闸门铸钢轨道超声波探伤方法与应用技术,分析了铸钢轨道探伤的适应条件和灵敏度调整的方法,阐述了铸钢轨道探伤应关注的重点. 相似文献
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介绍了奥钢联Schienen公司在累奥本/多纳维茨新建的现代化钢轨轧机的设备情况及其技术特点.该轧机在轧制钢轨时采用万能轧制模式.这种轧制模式与SCC机芯概念机架的组合,可获得极高的产品加工精度,使钢轨成品表面质量更好,延长轧辊使用寿命,使钢轨对称成形,降低内应力. 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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针对包钢生产350 km/h高速U71Mn钢轨钢w[N]偏高的问题,研究指出了高速轨钢液增氮的主要原因。采用无烟煤替代沥青焦作为增碳剂,钢液w[N]均低于65×10^-6。有效控制了钢中w[N]。 相似文献
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Progress of Study on Application of Rare Earth Metals in Steels 总被引:1,自引:0,他引:1
With the improvement of the clean steel by degrees, the functions of rare earth metals in steel are more focused on modification of inclusions and micro alloying.The new study concerning the application of RE metals in clean steels were investigated by ICP, metallographic examination, SEM, EDS, EPMA, TEM and IMMA.The mechanism of corrosion resistance in the weather resistance steel was clarified.The mechanism of abrasion resistance and the life of fatigue enhanced in the RE - heavy rails steel were discussed.Progress in study of application of rare earth metals in steels (including weather resistance steel, low alloy steel, and heavy rails steel) was covered in this paper. 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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V. V. Pavlov L. A. Godik L. V. Korneva N. A. Kozyrev E. P. Kuznetsov 《Metallurgist》2007,51(3-4):209-212
Results are presented from a study of the mechanical characteristics and microstructure of rails made at the Novokuznetsk
Metallurgical Combine from steel alloyed with manganese, silicon, chromium, molybdenum, and vanadium. It was established that
obtaining high strength and hardness in the steel by increasing its contents of carbon and alloying elements has an adverse
effect on the service properties of rails made of steels with a bainitic structure. Normalizing is the most effective means
of increasing strength and improving microstructure. The required level of mechanical characteristics can be obtained by tempering
the steel at 350–370°C. The adverse effect of cold straightening-which is manifest in a reduction in the rails’s impact toughness-can
be offset by subjecting the steel to preliminary tempering or normalizing and tempering. Rather than further increasing the
strength of rail steel to improve its overall quality, this objective is better served by making sure that the steel is cleanly
made, that the rails have little or no curvature, and that the residual stresses in the steel are favorably distributed.
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Translated from Metallurg, No. 4, pp. 51–53, April, 2007. 相似文献
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在某焊轨厂对75 kg/m钢轨进行焊接前,发现多支钢轨在轨底出现裂纹和掉块伤损。经对伤损钢轨取样进行研究分析,钢轨性能、冶金质量均符合相应技术标准要求。针对钢轨裂纹特征,采用某软件对钢轨焊接前堆垛中的受力状态进行分析。结果表明,钢轨出现轨底裂纹伤损的原因是:钢轨堆垛时未按要求放平,出现倾斜,造成一侧轨底角局部受力过大,从而产生裂纹伤损。 相似文献
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N. A. Kozyrev E. V. Protopopov A. A. Umanskii D. V. Boikov 《Steel in Translation》2015,45(10):717-722
Research in the electrosmelting shop at OAO EVRAZ ZSMK indicates that, if inert gas is injected into molten rail steel in the ladle for 122 min, rather than 63 min, the quantity of nonmetallic oxide inclusions may be reduced, without impairing overall rail quality. Industrial experiments show that replacing MnS18 silicomanganese with FeMnSi30HP silicomanganese in the reduction of rail steel is economically effective in the electrosmelting shop at OAO EVRAZ ZSMK. The assimilation of carbon and silicon is increased by 4 and 13%, respectively. The mechanical properties and macrostructure of rails obtained by this experimental technology match those of the steel currently produced. According to the calculation results, the use of FeMnSi30HP ferroalloy provides savings of 13.99 and 32.64 rub/t for rails of category T1 and NE, respectively. 相似文献