Preparation method of brass wire

Abstract

The invention discloses a preparation method of a brass wire. The preparation method is characterized in that brass comprises the following components in percentage by mass: 55%-62% of Cu, 0.5%-1.5% of Mn, 0.2%-0.5% of Fe, 0.3%-0.8% of Al, 0.2%-0.5% of Pb and the balance being Zn and inevitable impurities; and a technological process comprises ingredients, smelting, semi-continuous casting, extrusion and combined drawing, wherein the ingredients comprise a bright line, a zinc ingot, electrolytic manganese, an iron-copper alloy and an aluminum wire which are required according to component proportions. According to the invention, by controlling a smelting technology, melt with uniform components is obtained, and preparation work is made for the subsequent semi-continuous casting to obtain a cast ingot with a uniform structure, so that the combined drawing can be directly performed after the extrusion, intermediate annealing in a traditional technology is omitted, the problems of coarse material grains, non-uniform phase structure distribution and anisotropy of physical and mechanical properties are avoided, and excellent mechanical properties, free cutting, bending performance and corrosion resistance are further obtained.

Description

technical field [0001] The invention relates to a preparation method of brass wire. Background technique [0002] Complex brass is made of copper and zinc as the main elements, and one or more of nickel, iron, manganese, silicon, aluminum, lead and other metals are added at the same time to obtain wear resistance and corrosion resistance superior to ordinary brass. Alloy materials with strength, hardness and machinability, which are widely used in ship and chemical parts, such as condensation pipes, gears, propellers, bearings, bushings and valve bodies, etc., electronic and electrical parts, such as connectors, connectors, screws, etc. , so that the development of complex brass has a strong material application pertinence, and C6782 alloy wire is one of them. [0003] The current production of C6782 alloy wire mainly adopts batching→casting→extrusion→drawing→annealing→pickling, repeated drawing→annealing→pickling, to the finished product specifications. This process can p...

AI Technical Summary

Problems solved by technology

This process can produce alloy wires with satisfactory mechanical properties (Japanese standard JIS3250, tensile strength above 490 MPa, elongation above 10%), but there are multiple annealings in this process, and the produced wires have coarse grains and low hardness. Even, there is local inhomogeneity in the phase structure, which directly leads to difficulties in drilling and chip removal, difficult cutting, poor bending performance and poor corrosion resistance when customers use it.

The main reason for multiple annealing is that the structure of the wire rod is not uniform after extrusion, and the mechanical properties are anisotropic. During the wire drawing process, the mechanical properties of the wire rod are also anisotropic. break in

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