A rare earth-containing cu-mg-si alloy and preparation method thereof

Abstract

The invention relates to a rare earth-containing Cu-Mg-Si alloy, which belongs to the field of copper alloys. The composition and weight percentage of the material are: Mg: 0.5-5.0%, Si: 0.5-3.0%, rare earth element: 0.1-0.5%, the balance is Cu and inevitable impurity elements, and the rare earth elements are La, Ce One of , Y, the preparation process of the material of the present invention is: placing the Cu-Si master alloy in a vacuum induction melting furnace, melting at 1050-1250 ℃ and lower than 0.1Pa atmospheric pressure, then adding the Cu-Mg master alloy and Cu-La (or Cu-Ce, or Cu-Y) master alloy, and uniformly cast into an ingot by electromagnetic stirring; then put the ingot into a resistance furnace and heat up to 600-700 ° C with the furnace, and keep it for 0.5-1.5h Cool to room temperature with the oven. In the invention, by adding low-cost Si and rare earth elements in the form of intermediate alloy in the Cu-Mg alloy, and then performing homogenization annealing treatment, the process is simple, the production cost is low, the smelting loss of alloy elements is small, the composition is accurate and easy to control, and the prepared alloy is prepared. High hardness, strong heat resistance and wide application range.

Description

technical field [0001] The invention belongs to the field of copper alloys, and relates to a rare earth-containing Cu-Mg-Si alloy and a preparation method thereof. Background technique [0002] Copper alloys have excellent electrical conductivity and thermal conductivity, and are easy to deform and process. Among them, Cu-Mg alloys are important materials for contact wires of electrified high-speed trains, but their strength, hardness and heat resistance are poor, and their application scope and quantity are limited to a certain extent. Further adding alloying elements and improving the performance of materials is the key to expanding the application of Cu-Mg alloys. Si and rare earth elements are both important alloying elements of copper alloys. Regarding the alloys formed by adding them to Cu-Mg at the same time It has not been reported in the literature yet. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a Cu-Mg alloy containing S...

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Problems solved by technology

[0002] Copper alloy has excellent electrical conductivity and thermal conductivity, and is easy to deform and process. Among them, Cu-Mg alloy is an important material for the contact wire of electrified high-speed trains, but its strength, hardness, and heat resistance are poor, and its application range and quantity are limited. Further adding alloying elements and improving the performance of materials is the key to expanding the application of Cu-Mg alloys. Both Si and rare earth elements are important alloying elements for copper alloys. The alloy formed by adding both to Cu-Mg at the same time No literature has reported yet

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