Research On Precision Forging Of High Temperature Alloy Blade

A blade, which plays the role of energy conversion, is one of the most important parts in aero-engine. Precision forging of blade is the tendency of developing blade forging technology. Because the shape of the blade is complex and it is difficult to deform the material used to manufacture blades, the blade precision forging technology is not sophisticated and lack systemic and intrinsic cognition. Therefore, in the process of blades manufacturing, there are problems. In this thesis, the method of the coupled thermo-mechanical numerical simulation was used to research the precision forging process of blade made of superalloy GH4169. The following contents are included in this paper.Firstly, research the new technical process of blade precision forging. Based on the experiments and data, the material model was built and the process was simulated. Analyze the simulation results and the theory of metal forming was introduced to find out the problems. As the adjusting of the technological parameters can not solve the problem, an improved technical blue print was designed. The engineering software Pro/E was regarded as geometric modeling tool to create the models for bar-extrusion, preforging and finish-forging. By software DEFORM, the improved precision forging process was simulated. Later, analyze the damage, temperature stress-effective, strain-effective, load-stroke curve and the average grain size to amend the model and the technological parameters. After that, the design of improved technical process was completed.Compared the simulation results with the practice, the reasonableness and practicality of the improved technical process was proved.The research provided theoretic guidance to the precision forging of blades and it is significant to the development of aero-engine.