CAJ | 학술논문

通过对青藏铁路钢轨铝热焊接头缺陷的分析发现,随着海拔高度的增加,铝热反应中气体溢出的倾向增加,使焊头内部气孔率增大;钢轨焊接预热过程中气体压力的增大,极易导致焊头表面产生夹渣等缺陷。试验表明,调整焊剂成分和预热工艺,能有效消除青藏铁路钢轨铝热焊的缺陷。
통과대청장철로강궤려열한접두결함적분석발현,수착해발고도적증가,려열반응중기체일출적경향증가,사한두내부기공솔증대;강궤한접예열과정중기체압력적증대,겁역도치한두표면산생협사등결함。시험표명,조정한제성분화예열공예,능유효소제청장철로강궤려열한적결함。
By analyzing the defects of thermite welded joint in Qing-Zang railway,it is found altitude increasing leads to the tendency of the gas spill and the pressure of preheating gas increasing during the thermit reaction.The increment is easy to cause defects of thermite welded joint,for example stomata and sand inclusion.The adjustment of flux composition and preheating parameters effectviely eliminates the defects of thermit welds in Qing-Zang railway.