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苏联铁路发展的主要方针是增加列车的载重量和运行速度来提高铁路运输能力,为此就要求低接触疲劳损伤倾向的高强度钢轨。钢轨接触疲劳强度低的缺陷是与钢中呈条状分布的Al_2O_3紧密相关。防止轨钢中产生条状分布的Al_2O_3夹杂最有希望的方法之一是采用硅镁钛中间合金进行终脱氧和变性处理。本文研究了用此法生产的钢轨的冶金质量、机械性能及使用寿命。工业性试验的亚共析钢(T59组)和过共析钢(T58组)轧制的钢轨是在下塔吉尔钢铁
The main direction for the development of the Soviet Union’s railways is to increase the carrying capacity and operating speed of trains to improve the capacity of railway transportation, thus requiring high-strength rails with low tendency to contact fatigue damage. Defects in the low contact fatigue strength of the rail are closely related to the Al 2 O 3 in the steel strip. One of the most promising ways to prevent inclusion of Al 2 O 3 inclusions in the strip steel is to use a Si-Mg-Ti master alloy for final deoxygenation and denaturation. This paper studies the metallurgical quality, mechanical properties and service life of the rails produced by this method. Industrial trials of sub-eutectoid steel (T59 group) and hypereutectoid steel (T58 group) of the rail rolling is in the lower Tagil Steel