High-strength casting titanium alloy and preparation method thereof

Abstract

The invention discloses high-strength casting titanium alloy and preparation method thereof. The preparation method comprises the following steps that titanium sponge, aluminum shots, aluminum-molybdenum alloy, niobium-titanium alloy, sponge zirconium, titanium-tin alloy and metal chromium are mixed according to the mass percentage of 5.2%-6.8% of Al, 1.6%-2.5% of Sn, 1.6%-2.5% Zr, 2.2%-4.0% of Mo, 0.8%-2.3% of Nb, 0.8%-2.2% of Cr, 0.1%-0.4% of Fe, less than or equal to 0.20% of O, less than or equal to 0.08% C, less than or equal to 0.05% N, less than or equal to 0.015% of H and the balance titanium, and are pressed to be made into strip-shaped electrode blocks; the pressed electrode blocks are assembled and welded into a strip-shaped electrode; the strip-shaped electrode is forged into acasting mother alloy electrode after smelting; and casting is performed, heat treatment is performed on the casting, and the high-strength casting titanium alloy is obtained. The high-strength casting titanium alloy is excellent in mechanical property, and can meet the high strength requirements of industrial complex structural parts for aviation equipment, aerospace equipment, weapon equipment and other equipment.

Description

technical field [0001] The invention belongs to the field of titanium alloy material manufacturing, and in particular relates to a high-strength casting titanium alloy and a preparation method thereof. The application technical fields include industries such as aviation, aerospace, and weaponry equipment manufacturing. Background technique [0002] Titanium and titanium alloys are widely used in many fields due to their excellent comprehensive properties such as high specific strength, corrosion resistance, weldability, high temperature resistance, and non-magnetic properties. But in contrast, the development of cast titanium alloys lags far behind wrought titanium alloys. In the 1950s, deformed titanium alloys began to be mass-produced and applied, while titanium alloy castings did not begin to be used in the petrochemical industry until the 1960s. The official application of titanium castings in the aviation industry has been in the 1970s, which is 20 years behind the app...

AI Technical Summary

Problems solved by technology

The key structural castings have relatively strict requirements on the material strength, most of which require the material strength to reach more than 1000MPa, but there is currently a lack of such applicable high-strength cast titanium alloys.

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