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Abstract:Usingoriginalweldedjointandonce£Çrepairweldedjointof£³£°CrMnSiA highstrengthsteelas
researchobjects,theinfluenceofrepairweldingonmechanicalpropertiesoftheweldedjointwasstudiedbytensile
test,fatiguetestandmicrostructureanalysis£®Theresultsshowthatthemechanicalpropertiesoftheweldedjoint
wereslightlydegradedafterrepairwelding£®Theweakpartoftheweldedjointintensilepropertywasheataffected
zonewhilethatinfatigueperformancewasweldingtoe£®Therepairweldinghadlittleinfluenceonthemicrostructure
aroundtheweldingseam£®
Keywords:£³£°CrMnSiAhighstrengthsteel;repairwelding;tensileperformance;fatigueperformance
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