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激光平直度仪在攀钢钢轨生产中的应用 总被引:1,自引:0,他引:1
简要介绍了攀钢从法国引进的GEISMAR激光平直度仪的测量原理 ,并阐述了该激光平直度仪在攀钢高速铁路钢轨生产中的应用情况。 相似文献
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G. V. Mokhov N. Kh. Mukhatdinov N. A. Kozyrev A. L. Nikulina L. V. Korneva 《Steel in Translation》2010,40(10):928-930
An experimental batch of R50 low-alloy Э78XCΦ steel rails is produced. Alloying with chromium (0.55%) yields an anomalous
combination of strength, plasticity, and impact strength. The microstructure of the metal consists of colonies of fine-grain
predominately sorbite-like pearlite. If the content of nonmetallic inclusions in the steel is sufficiently low, this extends
the working life of the subway rails. 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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连续铸钢结晶器钢水液位自动控制及其实践 总被引:12,自引:0,他引:12
介绍连续铸钢结晶器钢水液位自动控制技术的国内外状况,包括液位检测技术、控制算法和执行器等在实际生产过程中的应用情况及存在的问题。针对上述状况进行了评估并提出解决问题的建议。 相似文献
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针对我国及国际国外铁路用热轧钢轨标准的尺寸外形、牌号、成分、残余氢氧氮含量、力学性能、非金属夹杂物、残余应力、表面质量等方面差异作了对比分析。 相似文献