Numerical simulation for optimization of the extrusion process of GH4169 tubes

The hot extrusion process of GH4169 superalloy tubes was simulated by using Msc.Superform software with the true flow stress-true strain curves of GH4169 alloy at different temperatures and strain rates.The effects of technical parameters on the extrusion processing were systematically analyzed to optimize the extrusion process.The results show that high quality products can be expected using forward extrusion.The optimal parameters are the extrusion speed of 100 and 300 mm·s^-1,the die angle of 20 to 30°,the billet preheating temperature of 1 040 to 1 050 ℃ and a better lubrication condition.