Requirements For The Molding Process Of Gr4 Titanium Rods Under Hot Extrusion?
Apr 12, 2024
(1) Extrusion method. Reverse extrusion results in a more uniform metal flow than forward extrusion, cold extrusion results in a more uniform metal flow than hot extrusion, and lubricated extrusion results in a more uniform metal flow than unlubricated extrusion. The effect of extrusion method is realized by the change of friction conditions.
(2) Extrusion speed. The inhomogeneity of metal flow increases as the extrusion speed increases.
(3) Extrusion temperature. The uneven flow of metal increases when the extrusion temperature increases and the deformation resistance of the billet decreases. In the extrusion process, if the heating temperature of the extrusion barrel and die is too low, and the temperature difference between the outer layer and the metal in the center layer is large, the unevenness of metal flow increases. The better the thermal conductivity of the metal, the more uniform the temperature distribution on the end face of the ingot billet.



Chemical composition of Titanium Gr 4
| Ti | Fe | C | O | H | N |
| % | % | % | % | % | |
| bal | 0.3 | 0.08 | 0.25 | 0.015 | 0.03 |
Characteristics of Titanium Gr 4
| annealed | specification values (ASTM F67) |
| tensile strength Rm | ≥ 550 |
| yield-strength Rp0.2 | ≥ 483 |
| elongation A | ≥ 15% |







