Gr2 Titanium Rods Under Hot Extrusion Molding Process Requirements?

Gr2 titanium rods and titanium alloy rods billet thermal conductivity is low, in the hot extrusion will make the surface layer and the inner layer of the great temperature difference, when the temperature of the extrusion cylinder is 400 degrees, the temperature difference can reach 200 ~ 250 degrees.
In the suction strengthening and billet section has a large temperature difference under the joint influence of the billet surface and the center of the metal to produce very different strength properties and plastic properties, in the extrusion process will cause very uneven deformation, in the surface layer of the large additional tensile stresses, to become the root cause of the formation of cracks and cracks on the surface of the extruded products.
Extrusion at a or a+P phase zone temperature results in more uniform metal flow compared to extrusion at p phase zone temperature. The difficulty of obtaining high surface quality of extruded products is great. Until now, the extrusion of titanium alloy rods has required the use of lubricants. The main reason for this is that titanium forms fusible eutectic crystals with iron-based or nickel-based alloy die materials at temperatures of 980° and 1030° C. This results in strong die wear.