Finite Element Analysis of Precision Forging Process for 2Cr18Ni8W2 Stainless Steel Bar

The temperature and equivalent strain distribution of 2Cr18Ni8W2 stainless steel bar in two different precision forging processes were simulated by the DEFORM-3D finite element analysis software. The effects of forging process condition on the temperature field and strain field during precision forging process were analyzed and then verified by experimental results. The results show that the temperatures on the surface and inner of the billet in the optimized forging process were lower than those in the on-site process, and the strain distribution in the billet was also more homogeneous than that in on-site process. The deformation increase in the penultimate pass during the precision forging process would increase the uneven distribution of the strain in the billet after the last pass, initiating the grain size nonuniformity, and then resulted in ultrasonic test misinformation. The stainless steel bar forged with optimized process passed the ultrasonic test. The microstructure was uniform and the deformation twin was observed inside the isometric crystal.