Cold drawn titanium alloy profiles
On October 20, 2011, retired aviation industry expert Xu Jichang, on the basis of summarizing the past scientific research practices and experiences, conducted a joint cold rolling test with the TC4 titanium alloy material of AVIC Yunma Plant and obtained Initial success. The success of this test proves that the cold drawing technology of titanium alloy profiles can be realized, and that the cold drawing technology of titanium alloy profiles with original features has already stood at the forefront of the world.
The composition of titanium alloy TC4 is Ti-6Al-4V, belonging to (a + b) type titanium alloy, and has good comprehensive mechanical and mechanical properties. Than the intensity. TC4 strength sb = 1.012MPa, density g = 4.4 * 103, specific strength sb / g = 23.5, and the specific strength of alloy steel sb / g less than 18. Titanium alloy low thermal conductivity. The thermal conductivity of titanium alloy is 1/5 of iron, 1/10 of aluminum, TC4 thermal conductivity l = 7.955W / m · K. Titanium alloy lower modulus of elasticity. TC4 elastic modulus E = 110GPa, about 1/2 of the steel, so prone to deformation of titanium alloy processing. TC4 (Ti-6Al-4V) and TA7 (Ti-5Al-2.5Sn) titanium alloys, two kinds of implantation schemes were used to modify the surface. The results show that the microhardness of titanium alloy increases remarkably after ion implantation The sliding friction coefficient, effectively improve the wear resistance. X-ray photoelectron spectroscopy (XPS) analysis was performed on the implanted and uninjected samples to find out the modification mechanism, and satisfactory results were obtained.