Numerical simulation on thixo-co-extrusion of double-layer tube with A356/AZ91D
Based on analysis of the main forming methods for double-layer tube, a new short-term forming process called tbixo-co-extrusion was put forward in producing double-layer tube by combining the semi-solid forming technology and multi-billet extrusion technology. By means of forward extrusion with shaft, a finite element model of thixo-coextrusion with A356/AZ91 was constructed by ABAQUS FEM software. The distributions of temperature field and velocity field as well as the contact force during thixo-co-extrusion were studied. The diffusion on the interfaces between inner and outer metals was analyzed. The simulation results show that, in the beginning of thixo-co-extrusion, the uneven wall thickness can appear. To thickness ratio of 5:5, a double layer tube with good inner and outer wall combination can be realized if VA356 is 0.12 m/s and VAZ91 is 0.20 m/s.
semi-solid forming double-layer tube thixo-co-extrusion numerical simulation
WANG Kai-kun SUN Jian-lin MENG Hai-feng DU Yan-mei WANG Xi
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
国际会议
北京
英文
921-925
2010-09-16（万方平台首次上网日期，不代表论文的发表时间）