Titanium alloys for aerospace fasteners and a preparation method thereof, involving titanium base alloys, the elemental composition of which by mass percentage is Aluminium: 5%-9%, Vanadium: 1%-6%, Molybdenum: 8%, Niobium: 11%-15%, Zirconium: 1%, Chromium: 1%-2% and the allowance is Ti; Amorphous titanium alloy inoculant was added in the melting process of the titanium alloy. The titanium alloy used for aviation fasteners has a new and more reasonable element composition, amorphous titanium alloy inoculant is added in the melting process, and the heterogeneous nucleation core of titanium alloy during solidification is increased. The titanium alloy products for aviation fasteners obtained by the preparation method of titanium alloy for aviation fasteners can reach 1370MPa in tensile strength and 11.6% in elongation, which are both strong and tough, and can be widely used in the production of fasteners for civil aviation aircraft.
A number of electrodes were fused in a vacuum consumable arc furnace as a strip electrode by ion welding, and then the ingot was smelted for 2 ~ 3 times again as a consumable electrode to obtain the titanium alloy ingot. A β type titanium alloy and a preparation method thereof, in which a consumable electrode is prepared by mixing titanium sponge, pure aluminum, zirconium sponge, Ti-31%Mo, Ti-53%Nb and Al-80%Ta. Primary ingot was obtained by vacuum consumable electric arc furnace melting. The secondary ingot was obtained by smelting the primary ingot as consumable electrode. Titanium alloy made from secondary ingot as consumable electrode vacuum consumable melting titanium alloy commonly used for fasteners can not have both high strength and good plasticity.
The titanium alloy used for aviation fasteners has a new and more reasonable element composition, and the amorphous titanium alloy inoculant is added in the melting process of the titanium alloy, thus the titanium alloy used for aviation fasteners has both high strength and good plasticity, and meets the requirements of high strength and high toughness. The technical solution of the invention is as follows: titanium alloy for aviation fasteners, the mass percentage of element composition is Al 〜9%、V 〜6%、Mo :8%、Nb 〜 15%、Zr :l%、Cr :0. 〜2%and the allowance is Ti.
