Low-density titanium alloy containing aluminum and vitriol and having high strength and casting fluidity

Abstract

The invention provides a low density titanium alloy containing aluminum and vitriol and having high strength and casting fluidity, prepared through the following steps of: adding 86.0-90.0wt% of spongy titanium (Ti) basal body into pure aluminum (Al) and an aluminum-vitriol (Al-V) intermediate alloy, weighing 3.32-7.16wt% of pure aluminum and 5.64-8.18wt% of aluminum-vitriol intermediate alloy with the V content of 55 percent, adding into 86.0-90.0wt% of spongy titanium, uniformly stirring to form a Ti-Al-V mixture, pressing the Ti-Al-V mixture through a press machine to prepare a spongy titanium electrode, and then placing the spongy titanium electrode into a vacuum consumable-electrode electric-arc furnace or a vacuum induction furnace for vacuum smelting to obtain the low-density titanium alloy containing 6.85-9.5 percent of Al, 3.1-4.5 percent of vitriol and 86.0-90.0 percent of titanium and having high strength and casting fluidity; the yield of cast golf rod heads reaches 98 percent, and the low-density titanium alloy is suitable for preparing load-bearing parts.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy materials, in particular to a low-density titanium alloy containing aluminum and alum and having high strength and casting fluidity. Background technique [0002] Titanium alloy has high strength, low density and corrosion resistance, and has been widely used in aviation, aerospace, navigation, chemical industry and sports and leisure fields. For a long time, people hope to obtain low-density titanium alloys with higher strength and higher casting performance, so as to further expand the application of titanium alloys. [0003] Low-density titanium alloys have huge market potential. For example, golf club heads made of low-density titanium alloys can reduce the weight of existing titanium club heads and increase the volume of club heads, so as to improve the flight distance and Hitting accuracy. [0004] Low-density titanium alloy is a lightweight material, especially suitable for making ...

AI Technical Summary

Problems solved by technology

The strength of the titanium alloy material is low and the casting flow performance needs to be further improved

[0009] ④Ti-6Al-4V is a titanium alloy material with high strength, but the casting fluidity of this titanium alloy material is low

[0014] 1) Adding β-stable elements such as Mo, V, Nb or adding neutral elements such as Zr and Sn to the titanium matrix can improve the hardness of low-density titanium alloys, but due to the high specific gravity of these added elements, the titanium alloy formed The density will be greatly reduced;

[0015] 2) Although low-density titanium alloys can be obtained by adding an appropriate amount of aluminum (Al) to the titanium matrix, excessive aluminum content will lead to a decrease in the plasticity of the titanium alloy, and even brittle fracture, thereby reducing the strength of the titanium alloy;

[0016] 3) Adding an appropriate amount of alum (V) to the titanium matrix can inhibit the precipitation of brittle phases in the material and improve the strength of the material, but adding too much vanadium content will significantly reduce the density of the material and reduce the fluidity of the material; at the same time, the alum content Too high will also lead to a decrease in the plasticity of the titanium alloy and brittle fracture, thereby reducing the toughness of the titanium alloy

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