Laws Of Precision Forming Numerical Simulation For GH4169Level Four Rotor Blade

The blade is the driver core parts of boosting in power device，bearing a largenumber of airflow power under high speed rotating，easily appears fatigue damage inlong-term bad working conditions，so it needs to impose strict control of quality fromthe blade manufacturing source. Its not only need to get accurate appearance lesswithout flash through the precision forging technology，more to get the uniform internalmicrostructure in order to improve the overall mechanical properties of forgings. Theforging material properties、size accuracy、organization quality、streamline distributionetc all are closely related to forging process setting and restrict with each other. Basedon the GH4169level four rotor blade as the research object，through the numericalsimulation process of precision forging under different process parameters，the newprocess after analyzing and optimization feedback provide the solid guarantee to obtain“inside and outside” high quality blade. The paper main research contents are asfollows：(1)Based on the stress-strain curve data of heat compression deformationexperiment，regression established dynamic recrystallization microstructure model ofGH4169alloy under the plastic deformation process，separately get the average errorbetween the model calculation and measured value of dynamic recrystallization volumefraction and grain size are9%and6.8%，then realized expansion of microstructuresimulation function on the software DEFORM3D，and through compared the grain sizebetween the simulation results of big and small end of crowded bar with the practicalproduction at high magnification of metallographic organization chart，verify theaccuracy and reliability of microcosmic program development.(2)Using three-dimensional molding Pro/E software established final forgingsgeometry model，and then according to deformation degree range reverse designedcorresponding place dimension of the preforgings；Through the type of copy surface，created supporting mold cavity of related work steps for preforging and final forging，s- pecifically reasonable selection and design the forging die pressure center、partingsurface、flash bridge (tank)；Through the elasto-plastic finite element method "trymode" simulation，continuously improve and revise defects to perfect the mold design.(3)Respectively through the research method of selecting blade preforging’stypical selection and tracking the feature points on the preforging in the whole forgingprocess of forming metal flow characteristics and its changing trend，using already havethe function of microstructure evolution prediction software DEFORM3D，numericalsimulation the blade preforging and final forging steps，researched in the blade precisionforging process，the interaction between the rheological behavior of materials、organization change and forging thermodynamic parameters，and under differentconditions，the influence of deformation process parameters on macro and micro fieldquantity and performance in deformation process，further revealed hot-force-form offorgings evolution， from the angle of acquire the good organization bladeoptimizationed precision forging process.