The invention relates to a vanadium chromium titanium alloy plate and a preparation method thereof, belonging to the technical field of metal plastic processing. The vanadium chromium titanium alloy plate of the invention is composed of the following weight percentage components: 88 ~ 94%, Cr 2.9 ~ 6%, Ti 2.6 ~ 6%, the margin is the total mass ≤ 0.5% of unavoidable impurities. The vanadium chromium titanium alloy plate of the invention is made of alloy cast ingot prepared by hot metal reduction method + vacuum induction refining method as billet, which is prepared by successively homogenizing annealing of cast ingot, opening of envelope forging, hot rolling of envelope, cold rolling, solution + aging treatment + cooling with argon filling furnace and other processes. The V-Cr-Ti alloy sheet obtained by the invention has fine grain, uniform composition, good surface quality and excellent performance.
Vanadium chromium titanium alloy has long-term stability of low radioactivity, low decay heat, and can be recycled. Anti-radiation swelling, heat resistance up to 850℃, high thermal conductivity, low thermal expansion, low thermal stress, high temperature application limit, good compatibility in the liquid lithium circuit, and good machining performance, can be rolled into thin sheets, extruded into tubes, good weldability and other characteristics, and is selected as the structural material of V-Li cladding of fusion reactor. Among them, V4Cr4Ti and V5Cr5Ti alloys are the most representative. Most of the preparation methods use V, Cr, Ti pure metals as raw materials, and the cost is extremely high. For example, the purity of 99.9% of V, the market price is about 2,500 yuan /kg, to configure a furnace of the alloy (20kg, V4Cr4Ti) required cost is about 50,000 yuan, after melting, pressure processing, heat treatment of the alloy sheet price is very high, limiting the promotion of the application of the alloy.
A vanadium chromium titanium alloy plate is composed of the following weight percentage components: V88 ~ 94%, Cr2.9 ~ 6%, Ti2.6 ~ 6%, with a residual unavoidable impurity; Among them, the total mass of the impurity elements Ni, Mo, Nb, Cu, Al, Fe, Si, P, W, Zr, S, N, C, O is less than 0.5%.
Further, as a more preferred technical solution, the vanadium chromium titanium alloy plate is composed of the following weight percentage components: V90 ~ 92%, Cr4 ~ 5%, Ti3.5 ~ 5%, with a margin of unavoidable impurities.
The above-mentioned vanadium chromium titanium alloy plate is characterized by: the yield strength of the alloy plate is greater than 390MPa, the tensile strength is greater than 500MPa, the elongation is greater than 28%, and the section shrinkage is greater than 65%.
