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DOI: 10.15862/41SATS319 (https://doi.org/10.15862/41SATS319)
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Usoltsev A.M. Research of the influence of induction heating on the strength characteristics of steel 10HSND. Russian Journal of Transport Engineering. 2019; 6(3). Available at: https://t-s.today/PDF/41SATS319.pdf (in Russian). DOI: 10.15862/41SATS319
Research of the influence of induction heating on the strength characteristics of steel 10HSND
Usoltsev Andrei Mikhaylovich
Siberian transport university, Novosibirsk, Russia
E-mail: Mr-uam@mail.ru; Uam@stu.ru
Abstract. In the production of welded spans of railway bridges since the 70s of the last century, low-alloy structural steels are used. In these constructions in recent years there has been an intensive growth in the formation of fatigue cracks. Currently, the only technology used by Russian Railways for braking fatigue cracks is to drill a hole in the mouth of a crack, followed by setting a high-strength bolt into it and tightening it to a standard force. At the Siberian Research Institute of Bridges (Siberian Research Institute of Bridges SGUPS), innovative technologies have been developed to inhibit the growth of fatigue cracks and strengthen welded spans using soldering and induction heating. Technology has proven effective. It is known that heating a metal to high temperatures can significantly change its structure and characteristics. In the scientific literature there are no data on changes in the strength characteristics of low alloy structural steels as a result of rapid heating. In a laboratory study, an analysis was made of the change in the strength characteristics of low alloy structural steel with rapid induction heating. Studies of structural steel samples showed that quick short-term induction heating of structural steel to the temperature of brazing does not lead to a significant change in its strength characteristics, and brazing and induction heating can be used to strengthen structures with fatigue cracks.
Keywords: induction heating; yield strength; tensile strength; welded spans; fatigue cracks; induction heating; induction brazing; laboratory tests
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