Failure Analysis of Fatigue Fracture of Low Alloy Steel Circular Pipes
SUN Qian
CHENG Xinli
XU Rruiliang
HE Kang
YIN Lei
ZHANG Xiaodong
Abstract：The failure causes of fatigue fracture base tube were comprehensively analyzed by means of macroscopic morphology analysis,SEM scanning electron microscope analysis,EDS microchemical composition analysis,inclusion and metallographic structure analysis and tensile property analysis.The results show that the steel pipe is overheated under load,which induces local non-uniform deformation,and the crack in the middle section of the steel pipe is taken as the crack source,which continues to extend under the action of reciprocating alternating load,leading to fatigue fracture of the base pipe of the tower crane.
Keywords：low alloyhot rolled steel striptower crane base pipebecame invalidfatigue fracture
Publication Date：2023-12-20
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 51-53 )