High-performance and low-cost titanium alloy

Abstract

The invention discloses a high-performance and low-cost titanium alloy. The high-performance and low-cost titanium alloy is composed of the following components of, in percentage by mass, 4.3%-6.6% of Al, 2.0%-3.0% of V, 2.6%-3.2% of Mo, 1.6%-2.1% of Fe and the balance Ti and inevitable impurities, wherein the titanium alloy takes 1-grade titanium sponge, iron-molybdenum alloy, pure aluminum and TC4 recycled materials as raw materials and is obtained through a method of electron beam cold bed smelting. According to the high-performance and low-cost titanium alloy, the electron beam cold bed smelting method is adopted, and through the adding of the raw materials such as titanium sponge and the iron-molybdenum alloy which are not prone to causing high-density sinking and low-density volatilizing, so that non-uniformity of elements in the titanium alloy during the smelting process is avoided; meanwhile, large-scale utilization of the TC4 recycled material is realized, and the raw material cost is greatly reduced; in addition, the performance of the titanium alloy meets requirements of high strength and high dynamic bearing capacity of titanium alloy structural members in the military and civilian fields.

Description

technical field [0001] The invention belongs to the technical field of titanium alloys, in particular to a titanium alloy with high performance and low cost. Background technique [0002] Due to its excellent comprehensive performance, titanium alloy has been widely used in the fields of aviation, aerospace and weapon industry. However, during service, titanium alloy structural parts will be subjected to dynamic loads, and materials subjected to dynamic loads may deform at high strain rates, such as titanium alloy warhead shells, titanium alloy fan blades for aero-engines, and titanium alloy armor Wait. Under the action of dynamic load, the mechanical properties of the material are very different from those under the action of static load. Therefore, the dynamic mechanical properties of titanium alloys are an important evaluation criterion for their service performance. At present, the method of testing the dynamic bearing capacity of materials is the dynamic compression ...

AI Technical Summary

Problems solved by technology

However, a single eutectoid β-stable element is likely to cause segregation, which is detrimental to the performance of titanium alloys

Application No. 201710918992 "A Low-Cost, High-Strength, High-Titanium Alloy and Its Preparation Method" patent increases the strength of the titanium alloy by adding a large amount of Fe and Cr, but the titanium alloy has low plasticity

Application No. 201410628558 "A Low-Cost Titanium Alloy Adding Titanium Residuals" patent adds more than a dozen titanium alloy remnants to reduce the cost of titanium alloys. However, in order to ensure the performance of titanium alloys, the added β-stabilizing elements Relatively small, the amount of titanium residue added is also relatively small, and the effect of reducing costs is not obvious

In fact, due to the limitation of composition and performance of existing low-cost alloys, the amount and type of titanium alloy residues added are often limited

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