Simulation of selective laser melting process of GH4169 pre-swirl nozzle based on Simufact Additive
The 3D transient finite element model of the selective laser melting process of the GH4169 pre-swirl nozzle was built by using Simufact Additive software,and the simulation analysis of the risks during the additive manufacturing process was carried out.The influence of different process parameters on the stress field and shape variables was analyzed,and the optimum process parameters were obtained.The optimal process parameters and printing strategy were used to simulate the thermal-structure coupling field,and the deformation,temperature and stress distribution at various stages of printing,sub-strate cutting,support removal and heat treatment were analyzed.The results showed that the stress level of the joint of the lateral support of the part was more than 1000 MPa,which was easy to cause deformation and even support cracking.There-fore,the support scheme was optimized,and a large number of intermittent flake solid supports were added to the lateral area for reinforcement and heat transfer optimization.The parts shrank uniformly inward in each direction of the circumference.The shrinkage compensation measures of the parts were taken in actual printing.The heat treatment process further reduced and homogenized the stress level.
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