Preparation method of copper and magnesium master alloy

Abstract

The invention relates to a preparation method of copper and magnesium master alloy, comprising the following steps of: (1), firstly weighing raw materials (in percent by weight): 10% to 50% of magnesium and 50% to 90% of copper; (2) melting the weighed magnesium in a vacuum melting furnace; raising the temperature to 800 DEG C; regulating the vacuum degree to 0.1 to 0.3 Pa; adding the copper; quickly raising the temperature to 1150 DEG C to 1280 DEG C; uniformly stirring by a stone grinding stick until completely melting the copper and thoroughly reacting; and (3) directly pouring reactants by a water cooling copper mould to form a cast ingot to prepare the copper and magnesium master alloy. The preparation method of the copper and magnesium master alloy is used for largely reducing the burn of the magnesium; the proportion of the alloy is easily controlled; the oxidation degree of the copper is reduced; only the outer surface of a cast is black; after being ground, the alloy is bright copper; the inner part of the alloy does not have any defect; and the preparation method is especially suitable for scale production and application.

Description

technical field [0001] The invention relates to a preparation method of a copper-magnesium master alloy, which belongs to the field of metal materials. Background technique [0002] At present, as the speed of high-speed trains continues to increase, the materials used in high-speed railways are also constantly being updated. In the construction process of high-speed railway electrification, the construction of high-speed railway catenary is a very important part. The function of the catenary cable of the railway catenary is to suspend the contact line through the suspension string, and the catenary cable can also carry a certain amount of current. Reduce traction network impedance, reduce voltage loss and energy consumption. The function of the hanging string is to suspend the contact wire on the catenary cable. According to its use position, there are different suspension string types in the span, on the soft span or in the tunnel. The suspension string is one of the imp...

AI Technical Summary

Problems solved by technology

Therefore, in actual production, it is very difficult to directly add magnesium to the copper melt, which requires smelting under vacuum or very complicated gas protection under non-vacuum, usually by first melting the copper, and then using In the method of excessively distributed addition, magnesium is added to the molten copper, stirred evenly and then cast into shape, and then the yield is calculated to feed back to the next alloy preparation. The copper-magnesium master alloy prepared by this method is Copper oxidation is serious, the burning loss of magnesium element is large, and the distribution is extremely uneven, especially for the direct preparation of alloy contact wires, the ratio is very difficult to control, and the composition is difficult to accurately control, so the direct addition of magnesium element is used for actual mass production caused great difficulty