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为了解决SONOTRONTM超声波站检测效率低、误判率高等问题,通过开发新型探头材料,研制方形探头等实现了探头国产化,并首创了在线随动探伤方法。结果表明:采用国产化探头,超声波站设备故障时间降低83.3%;探头寿命提高6.5倍,探头价格降低一半,在线更换调整时间缩短2/3;检测出钢轨缺陷的重现率不小于99.55%,且探伤起落架可适用于多种规格的重轨。 相似文献
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介绍了一种能够满足200km/h钢轨的探伤要求的在线超声波探伤新装置,该装置的特点是体积小,运行稳定,抗干扰能力强,其波形和模图能同时显示和记录。 相似文献
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为了满足钢轨标准和现场生产需要,攀钢轨梁厂自主开发研制了一套钢轨超声波探伤装置,该套装置在现场进行了规模化生产运行,生产实践证明装置性能优良,探伤满足标准要求.文章简要介绍了该套装置的超声探头、机械装置、超声探伤仪和电控系统. 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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介绍柳钢开发研制热轧中厚板在线自动化超声波探伤技术的历程,以及60通道超声波自动探伤技术及其装置。 相似文献
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介绍了国内钢轨超声波探伤中轨底探头的设计原理及声场特性,分析了轨底裂纹状况对缺陷回波的影响,提出了增加探头、增加涡流探伤方法等措施。 相似文献
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包钢轨梁厂60kg/m重轨超亩波探伤自动作业线于今年三月投产,各项技术指标达到YB951—81《钢轨超声波探伤方法》规定的标准,从此,60kg/m重轨将全部经过超声波探伤检验出厂。 60kg/m重轨,是我国当前急需的基础钢材。 相似文献
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国内外热处理钢轨性能分析 总被引:5,自引:1,他引:4
主要介绍了国内外几个主要厂家生产的全长热处理钢轨的实物性能,对国内外几种全长热处理钢轨的实物性能检验分析表明,我国攀钢PD3含钒微全金热处理钢轨的综合机械性能最好;攀钢PD2碳素热处理钢轨综合性能指标不亚于国外同类热处理钢轨;日本DHH铬合金在线热处理钢轨的硬度、强度与离线碳素热处理钢轨相当,但韧性略低。 相似文献
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V. V. Murav’ev A. V. Baiteryakov A. M. Glezer V. E. Gromov 《Russian Metallurgy (Metally)》2018,2018(4):421-425
The changes in the ultrasonic surface and lateral wave velocities near the head running surfaces of rails having carried various weights are studied. The surface and lateral wave velocities are found to correlate with the hardness and the structure of rail steel. 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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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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重轨钢的炉外精炼与连铸 总被引:6,自引:1,他引:5
论述了重轨钢真空处理的必要性及国外重轨厂家采用真空处理的现状。对用连铸坯轧制重轨的优点及重轨钢连铸工艺特点作了说明,介绍了国外改善连铸方坯质量的措施和用连铸坯轧制重轨的主要厂家。 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
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21世纪钢轨钢的展望 总被引:7,自引:1,他引:6
分析了世界铁路发展现状和今后发展趋势,指出根据铁路高速重载的要求,开发研制了新型钢轨钢,主要是贝氏体钢,马氏体钢和过共析珠光体钢轨钢,从试验室数据和线路试铺的结果看,这些新钢种的性能良好 相似文献