The invention relates to a vanadium-chromium titanium alloy plate and a preparation method thereof, belonging to the technical field of metal plastic machining. The vanadium-chromium-titanium alloy plate of the present invention is composed of the following weight percentage components: V 75 ~ 94%, Cr 2.9 ~ 15%, Ti 2.6 ~ 10%, and the allowance is the inevitable impurities with a total mass ≤ 0.5%. The vanadium-chrome-titanium alloy plate of the invention is prepared by smelting ingot as billet and has been successively prepared by ingot homogenization annealing, coiling forging billet, coiling hot rolling, cold rolling and solution + aging treatment + cooling with argon in the furnace. The V Cr Ti alloy sheet obtained by the invention has fine grain size, uniform composition, good surface quality and excellent performance.
Vanadium chromium titanium alloy because of its best comprehensive properties, such as long-term stability of low radioactivity, low decay heat, and can be recycled; Radiation-hardened swelling temperature can reach 850 ° C, heat resistance, high heat conductivity, low thermal expansion, low thermal stress, high temperature limit, in liquid lithium circuit has good compatibility, and good processing performance, can be milk into thin sections, crowded into tubes, good weldability, etc., has been the industry recognized as thermonuclear fusion first wall materials/low activation of choice for cladding structure.
V-Cr-Ti alloy is a sensitive alloy material, although some international scientific research institutions have done research, but most of the research results are kept confidential, the detailed processing parameters of the alloy are rarely reported. The preparation technology and theoretical research of this kind of alloy is relatively late, the scale is small (tens of grams ~ 100kg) and is not systematic, mainly in the laboratory research and testing, and the research results are rarely reported. The scale production of V-Cr-Ti alloy can be realized by using vacuum consumable electrode arc melting method, and V-Cr-Ti alloy sheet with fine grain size, uniform composition, good surface quality and excellent performance can be prepared by controllable processes such as forging, milking and heat treatment.
The V-Cr-Ti alloy sheet obtained by the invention has fine grain size, uniform composition, good surface quality and excellent performance; The method of preparing vanadium-chromium-titanium alloy plate of the invention adopts vacuum coating and heat treatment to obtain alloy forging coating body, which realizes the anti-oxidation protection of the alloy in the process of hot forging, and the inner structure of the coating is filled with high temperature resistant aluminum silicate fiber felt to keep the billet side warm, and the effect is good; The graphite gasket with high thermal conductivity is used between the upper and lower force end faces of the billet and the cladding surface, which is conducive to the heating and temperature uniformity of the billet end face, and also plays the role of friction lubrication of the end face in the process of pressure processing, reducing the probability of cracks on the processed surface.
