Wear-resistant aluminum alloy and preparation method thereof

Abstract

The invention relates to a wear-resistant aluminum alloy and a preparation method thereof, and belongs to the technical field of non-ferrous metals. The aluminum alloy is prepared from the following chemical components in percentage by mass: 10.4 to 11.8 percent of Si, 1.5 to 2.5 percent of Zr, 1.2 to 2.2 percent of Ti, 0.05 to 0.1 percent of Cu, 1.2 to 1.7 percent of Sn, 0.5 to 0.7 percent of Mn, 1.4 to 2.4 percent of Nb, 0.07 to 0.2 percent of Fe, 0.03 to 0.15 percent of Ni, 0.05 to 0.15 percent of Cr, 0.14 to 0.22 percent of V, 0.2 to 0.25 percent of Mo and the balance of Al. The preparation method comprises the following steps: firstly, carrying out mechanical alloying through a high-energy ball mill, and then carrying out microwave sintering, low-temperature rolling, vacuum annealing treatment and magnetic field subzero treatment. By optimizing the contents of elements such as silicon, zirconium, copper, nickel and manganese and adding chromium, vanadium, molybdenum and tin, forced solid solution between atoms of different elements is realized by means of mechanical alloying, and a microwave sintering technology, a low-temperature rolling technology and a magnetic field cryogenic technology are applied to refine crystal grains, improve compactness and form deformation stress strengthening, so that the high-strength and high-toughness alloy is obtained. And the hardness and wear resistance of the aluminum alloy are improved.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials, and particularly relates to a novel high wear-resistant aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloy has low density, but relatively high strength, close to or surpassing high-quality steel, good plasticity, can be processed into various profiles, has excellent electrical conductivity, thermal conductivity and corrosion resistance, widely used in industry, second only to steel However, the wear resistance and hardness of aluminum alloys are generally lower than those of other alloys, which leads to a limited range of applications. [0003] With the increasing demand for energy in various countries in the world, materials with low density, high specific strength and specific stiffness have been paid more and more attention by designers and material scientists. , magnesium alloys, lithium alloys and titanium alloys, etc.; due to the rich reso...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a new type of high wear-resistant aluminum alloy and its preparation method to solve the problems of poor wear resistance and low hardness of existing aluminum alloys

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