A kind of preparation method of high-purity oxygen-free high silver-containing copper rod

Abstract

The invention belongs to the technical field of nonferrous metallurgy manufacturing, and particularly discloses a preparation method for a high-purity oxygen-free high silver-containing copper rod. The preparation method comprises the following steps that (1) burdening is carried out, specifically, the following raw materials are prepared, the raw materials comprise, by weight, 0.0085-0.2% of silver, 0.015-0.05% of zirconium, 0.015-0.03% of chrome, and the balance copper; (2) raw copper is heated and roasted; (3) the raw materials are melted into a solution at the temperature of 1138-1550 DEGC; (4) the surfaces of an up-drawing line frequency furnace where the raw materials are melted and a transition warehouse are covered with graphite scales, the surface of a melting furnace is coveredwith charcoal for oxygen insulation treatment, and carbon dioxide gas is injected into the surface of the whole furnace; and (5) the water quantity of the up-drawing line frequency furnace is adjusted, so that the water pressure is kept at 0.2-0.25 Mpa, and the temperature of cooling water is kept at 50-55 DEG C. The high-purity oxygen-free high silver-containing copper rod is produced by the preparation method, the processing steps are simplified, the energy consumption and manufacturing cost are reduced greatly, and a product obtained from production is greatly improved in aspects of oxidation resistance, creep resistance, abrasion resistance, heat-erosion resistance, strength, and the like.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy manufacturing, and in particular relates to a method for preparing a high-purity oxygen-free high-silver copper rod. Background technique [0002] The condenser is a synchronous motor that runs without load. By changing the magnitude of its excitation current, it can be controlled whether it absorbs reactive power from the system or outputs reactive power. There are high requirements for the rotor coil in the condenser, and it is required to have good mechanical properties in terms of wear resistance, strength, and hardness. Silver-containing copper rods have been greatly enhanced in terms of mechanical properties such as wear resistance, strength, and hardness due to the addition of trace amounts of silver elements, and still maintain high electrical conductivity. Therefore, silver-containing copper rods are widely used in large motors in the rotor. Although the addition of trace ...

AI Technical Summary

Problems solved by technology

The existing silver-containing copper rods have many processing steps, including extrusion, cold rolling, annealing, pickling, etc. The steps of extrusion and cold rolling tend to make the surface of the product uneven, and cause stress deformation, which requires annealing treatment , eliminate residual stress, stabilize dimensions

During the annealing process, the product is prone to oxidation reaction, and oxidation residues are generated on the surface of the product, which increases the contact resistance of the product. An excessively thick oxide layer may even prevent the current from passing through or generate excessive current density locally. problems, resulting in spatter and surface burns, shortening the life of the material

In addition, the existing production method has low production efficiency, serious waste of resources, and low yield

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