Research On Investment Casting And Hot Isostatic Pressing Of Multi-body Blades

The melting mold casting technology of multi-body blade is an inevitable requirement for the further development of aero-engine technology.With the improving of the aircraft engine design and manufacture level,multi-body guided blade will Heading towards more couplet body,more complex structure,higher dimensional accuracy and stricter quality requirements.It is a good material for the part of the turbine.In this paper,the multi-process parameters of K417 G alloy casting multi-body guide blade are systematically studied.In this paper,the possibility of a multi-body guided blade is explored.Through the use of UG software,the overall pressure mold is simulated,designed and manufactured with reasonable structure,high precision and high production efficiency.The shrinkage of wax modulus increases with the increase of injection temperature,and decreases with pressure increase and time increase.The wax mould quality increases with the increase of the three parameters and then decreases.The corresponding parameters should be selected according to the actual structural characteristics of the castingsThe properties and quality of ceramic core are mainly affected by the particle size distribution,mixing time of slurry and sintering temperature and sintering time.The coarse powder in the matrix influences the strength of the core.Fine powder influences the surface quality of core.It is necessary to stir more than 24 h to make the mixture evenly.With the sintering temperature getting higher and the sintering time getting longer,the amount of deformation increases,the heat intensity increases,and the intensity of room temperature rises first and then decreases.Aluminate powder is added to the shell surface coating to effectively refine the casting surface.For a casting system that can be entered from the bottom and top,The size of the gate in the bottom is more obvious to the casting quality.The casting temperature has great influence on the loose and lasting performance of the casting.With the casting temperature increasesing,the casting loose is decreasing gradually,and the durability is gradually improved.However,when the casting temperature was too high,the casting microporosity increased rapidly and the casting duration decreased rapidly.The hot isostatic pressing is effective in improving the casting performance by improving the microstructure of the casting.The microstructure of multibody guided blades changed after hot isostatic pressing treatment.By pressing the loose surrounding ?? raft was synthesized,and assumes the circular arc configuration forthe center with osteoporosis.The second phase along the grain boundary is linear continuous precipitation When the temperature is higher.Its macroscopic plasticity has greatly improved,but the persistence performance has been greatly reduced.After the low temperature of the hot isostatic pressing treatment,the higher temperature can be used to repair the tissue and improve the life of the castings.