Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1638533 | Transactions of Nonferrous Metals Society of China | 2010 | 5 Pages |
Abstract
Based on analysis of the main forming methods for double-layer tube, a new short-term forming process called thixo-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-co-extrusion 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.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Kai-kun WANG, Jian-lin SUN, Hai-feng MENG, Yan-mei DU, Xi WANG,