Study of Melting Methods by Electric Resistance Welding of Rails
نویسندگان
چکیده
An analysis of the results rail operation shows that up to a third all breaks in railway line and 12.9% withdrawn acute defective rails are associated with welded joints. This is largely explained by formation structures martensite sections joints burns. work presents studying joints, obtained under three welding modes (continuous flash welding, pulsating combined welding). The conducted studies have shown mode significantly influences both cooling rate value very nature thermal cycle joint as whole. Changes different exert significant influence on structure properties weld. Resistance from steel grade E76HGF can result appearance needle areas, which reason for increased embrittlement weld decrease its properties. field experiments reliably conditions it becomes possible avoid these problems. Moreover, slight increase mechanical range 2–4% has been experimentally recorded, destructive load increases 2–3% at high values bending deflection. In turn, factors allow reduction number cases welded-joint failures real their operation.
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ژورنال
عنوان ژورنال: Metals
سال: 2022
ISSN: ['2075-4701']
DOI: https://doi.org/10.3390/met12122135