介質(zhì)長度對鋼軌-高錳鋼轍叉閃光焊接頭性能影響的研究

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Abstract： In order to explore the influence of length of austenitic stainless steel welding inserton the flash welding performance ofrail steel-high manganese steel frog，taking the flash welded joints with diferent insert lengths as the research objects，the mechanical properties and microstructure of the rail steel-high manganese steel frog flash welded joints were analyzed by means of mechanical property tests，metallographic tests，electron microscope observation and other methods.The results show that the tensile strength of the flash welded joints presents a negative correlation trend with the post-welding length of the insert， while the impact absorption energy presents a positivecorelation trend with the post-welding length of the insert.There are differences inthe thermal impact and upseting force receivedby the flash welded joints with different insert lengths during the welding process.The joints withashorter insertlengtharerelativelymore severelyafected，resulting indiferences inthe microstructure morphology characteristics of the insert area.

Keywords： flash welding;austenitic stainless steel insert; mechanical properties; microstructure

1 序言

道岔是一種使機車車輛從一股道轉(zhuǎn)入到另一股道的連接設(shè)備，既是諸多鐵路基礎(chǔ)設(shè)施中的關(guān)鍵環(huán)節(jié)，也是薄弱環(huán)節(jié)。（剩余4346字）