Fracture failure analysis and improvement of pinion shaft in gear distribution box of rolling mill
PENG Xuezhi
HU Xiao
XIONG Jie
Abstract：In the paper,the fracture morphology,chemical composition,mechanical properties and metallographic organization of the broken pinion shaft of the gear distribution box are tested and analyzed.It is found that the fracture morphology of the pinion shaft is brittle fracture,the mechanical properties are lower than the design requirements,and the internal organization has the problems of segregation,high inclusions,and insufficiently dense organization.On this basis,improvement suggestions are made for the subsequent pinion shaft manufacturing process,including controlling the content of harmful elements and the number of non-metallic inclusions,ensuring the billet forging ratio,improving the preheating treatment process and controlling the quenching temperature and cooling speed after carburizing.This paper provides a reference for the manufacturing process of subsequent pinion shafts.
Keywords：gear distribution boxpinion shaftfracturefailure analysis
Publication Date：2024-11-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 102-106 )