Hot-sprayed zinc-aluminum alloy wire and preparation method thereof

Abstract

The invention relates to a hot-sprayed zinc-aluminum alloy wire and a preparation method thereof. The hot-sprayed zinc-aluminum alloy wire comprises the following components in percentage by weight: 2-20% of aluminum and the balance of zinc. The preparation method of the hot-sprayed zinc-aluminum alloy wire comprises the following steps of: feeding zinc and aluminum according to a component ratio, smelting and casting to form cylindrical zinc-aluminum alloy ingot materials; producing bar stocks by using a hot extrusion machine, and rolling the bar stocks by using a wire rolling machine to produce wire materials with the diameter phi of 3.0-4.5 mm; and then, repeatedly carrying out cold drawing on the wire materials by using a drawing die, so as to produce zinc-aluminum alloy wires with the diameter phi of 1.6-4 mm.. According to the preparation method, the drawing frequency during the forming of the zinc-aluminum alloy wires is greatly reduced, the alloy structure becomes more uniform during the process of rolling zinc-aluminum alloy, the tensile strength of the rolled wires is reduced by 8-10%, and the percentage elongation is increased by 12-15%, wire break can be avoided in a drawing process, the diameter of finished product wires is uniform, the production efficiency is greatly increased, the energy consumption and production cost are reduced, and the environmental pollution is lightened. Thus, the invention successfully provides an economical and feasible technology for the large-scale industrial production of the hot-sprayed zinc-aluminum alloy wires.

Description

technical field [0001] The invention relates to a thermal spraying alloy wire and a production process thereof. Background technique [0002] Spraying metal layers such as zinc or aluminum on the surface of steel is currently a more effective and reliable method for anti-corrosion treatment of steel. The processing method is usually to melt and continuously cast zinc or aluminum into a bar with a larger diameter, and then temper the stock and draw it several times to obtain a sprayed wire with a smooth surface and a uniform diameter of Φ1.6-4mm. Apply heat or flame spray gun to the cleaned steel surface to form a corrosion-resistant protective layer. The commonly used zinc metal protective layer has better electrochemical protection for steel, but its corrosion resistance is poor, and it corrodes and destroys quickly in seawater; while the aluminum metal protective layer has good anti-corrosion stability and wear resistance. However, the electrochemical protection is poor....

AI Technical Summary

Problems solved by technology

However, the forming and processing of zinc-aluminum alloy sprayed wire is very difficult

Because the conventional drawing method of pure zinc or pure aluminum spraying wire is used, it takes more than 20 times to draw from a holding material with a diameter of more than ten millimeters to a spraying wire with a diameter of 1.6 to 4 mm suitable for spraying guns. However, due to the segregation of zinc and aluminum in zinc-aluminum alloys, the alloy structure is not uniform, and the plastic deformation resistance increases, often resulting in broken wires and uneven wire diameters during drawing, and the hardness of sprayed wires is high, which is inconvenient Application of spray gun

So far, no solution has been found to solve the problem of low production efficiency, high energy consumption, high production cost and poor quality of zinc-aluminum alloy sprayed wire. Therefore, this new type of excellent high-corrosion-resistant metal protective layer material has not yet been improved. Extensive practical promotion and application