Method for the melting of near-beta titanium alloy consisting of (4.0-6.0) wt % Al-(4.5-6.0) wt % Mo-(4.5-6.0) wt % V-(2.0-3.6) wt % Cr-(0.2-0.5) wt % Fe-(0.1-2.0) wt % Zr

摘要

This invention relates to nonferrous metallurgy, namely to manufacture of near-beta titanium alloys containing titanium and such alloying elements as molybdenum, vanadium, chromium, zirconium, iron and aluminum. The provided alloy contains the following components, in weight percentages: molybdenum—25 to 27; vanadium—25 to 27; chromium—14 to 16; titanium—9 to 11; with balance aluminum and iron and zirconium in the form of commercially pure metals. The technical result of this invention is capability to produce a near-beta titanium alloy with high chemical homogeneity alloyed by refractory elements and having aluminum content ≦6 wt %, wherein the alloy is characterized by a combination of stable high strength and high impact strength.

主权项

1. A method for forming a near β-titanium alloy comprising (4.0-6.0)% Al—(4.5-6.0)% Mo—(4.5-6.0)% V—(2.0-3.0)% Cr, (0.2-0.5)% Fe—(0.2-2.0)% Zr and the balance Ti, the method comprising the steps of:
(i) a fabrication of a consumable electrode comprising titanium with incorporation of alloying elements into an electrode charge material by combining a complex master alloy comprising Al, Mo, Cr, V, Ti with pure elements Fe and Zr; and (ii) the β-titanium alloy is formed by at least a double melting of the consumable electrode, wherein the first melting is done by vacuum arc melting or skull melting, and the second and subsequent meltings are done by vacuum arc melting.