metals Article Die Design for Extrusion Process of Titanium Seamless Tube Using Finite Element Analysis Byung-Jin Choi 1,2,3, In Yong Moon 2 , Young-Seok Oh 2, Seong-Hoon Kang 2 , Se-Jong Kim 2, Jaimyun Jung 2, Ji-Hoon Kim 3 , Dong-Kyu Kim 4 and Ho Won Lee 2,* 1 Technical Support Team, Forge Master Korea, Changwon 51395, Korea;
[email protected] 2 Department of Materials AI & Big Data, Korea Institute of Materials Science, Changwon 51508, Korea;
[email protected] (I.Y.M.);
[email protected] (Y.-S.O.);
[email protected] (S.-H.K.);
[email protected] (S.-J.K.);
[email protected] (J.J.) 3 School of Mechanical Engineering, Pusan National University, Busan 46241, Korea;
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[email protected]; Tel.: +80-55-280-3843 Abstract: In this paper, the extrusion process of titanium seamless tubes was studied using several finite element (FE) analyses. First, the finite element result was compared with experimental extrusion data acquired to validate the current analysis. Then, the effect of design parameters of the die shape was numerically analyzed using commercial FE software, Forge NxT, for the metal forming process. Elastic FE analyses were also conducted for dies to analyze the maximum principal stress that affects the early fracture of dies during the extrusion process and the maximum von Mises stress that causes the severe deformation of dies. Consequently, the effect of the corner radius at the exit and land length on the extrusion load and die stress is negligible compared to that of the corner radius at Citation: Choi, B.-J.; Moon, I.Y.; Oh, the entrance and die angle.