Study On Macroscopic And Microscopic Laws Of GH4169 Superalloy Shafts In Cross Wedge Rolling

Superalloys have excellent high temperature strength,good oxidation and hot corrosion resistance,good fatigue properties and fracture toughness,which are the key research objects in the field of new materials,and has been gradually applied to high-end equipment shaft parts such as aviation.At present,the processing of high-temperature alloy shaft parts is mostly formed by cutting,forging,etc.,but there are disadvantages such as waste of expensive high-temperature alloy materials and low forming efficiency,at the same time,the shaft parts produced have poor mechanical properties,coarse grains and uneven grain distribution.The cross-roll forming GH4169 alloy shaft parts proposed by this subject have the advantages of high efficiency,low noise,high material utilization and stable quality.Therefore,it is of great engineering value and practical significance to carry out the research on the macroscopic and microscopicity of the GH4169 superalloy shafts.In this paper,the GH4169 alloy shaft is taken as the research object,and the variation of forming and formation is systematically studied by the combination of finite element simulation and experiment.The corresponding finite element simulation values were extracted,and the variation rules of the cross-rolling forming GH4169 alloy in the force energy parameters,stress field and strain field macroscopic forming were analyzed,the variation law of the widening angle,forming angle and section shrinkage rate on the force energy parameters of wedge cross-rolling forming GH4169 alloy is analyzed.By extracting the corresponding finite element numerical simulation results,the dynamic recrystallization and grain size change of GH4169 alloy cross wedge rolling were analyzed,the variation of rolling temperature,broadening angle,forming angle and section shrinkage ratio on the micro-grain of wedge-cross rolling forming GH4169 alloy was studied in detail.Through the comprehensive analysis of various parameters,the influence of the primary and secondary was obtained.The theoretical basis for the quality of the cross-rolled GH4169 alloy is provided.The microscopic grain uniformity of the formed shaft was studied by orthogonal experiment,and the influence of various parameters on the microscopic uniformity of GH4169 alloy was studied.The optimal process parameters were obtained.Finally,the rolling torque test of GH4169 alloy shaft parts was carried out.The error between the experimental results and the simulation results was within 10%,which verified the accuracy of the simulation.The microscopic metallographic experiment of GH4169 alloy was carried out.The experimental results were basically consistent with the simulated grain size results,which verified the accuracy of the microscopic simulation.The research results in this paper provide reliable theoretical guidance for solving the problems of difficult forming and deformation resistance of GH4169 alloy shafts,it provides a basis for improving the physical properties of GH4169 alloy shaft parts.