Method for manufacturing copper-niobium alloy through laser additive manufacturing technology

Abstract

The invention discloses a method for manufacturing a copper-niobium alloy through the laser additive manufacturing technology. The method has the characteristic of rapid solidification through the laser additive manufacturing technology, two elements of Cu and Nb which are hardly dissolved mutually are made into supersaturated solid solutions which are hard to obtain through a conventional method,fine in grain and uniform in structure, Nb is uniformly dispersed and separated out through the subsequent heat treatment process, and therefore a high-strength nanometer dispersion strengthening copper alloy is made. In addition, due to the fact that the solid solubility of Nb in copper is extremely low, high-concentration nanometer dispersion Nb is utilized for strengthening a matrix, meanwhile, it can be guaranteed that the copper matrix still has high purity, and electrical conductivity of the alloy is also good. By means of the laser additive manufacturing technology, Nb can be uniformlydispersed and distributed in a Cu matrix, the high-strength and high-electric-conduction alloy is prepared, meanwhile, the characteristic of near-net forming is achieved, processing procedures are greatly reduced, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to a method for manufacturing copper-niobium alloy by using laser additive technology. Background technique [0002] Because of its excellent properties, high-strength and high-conductivity copper alloys are considered to be new functional materials with great development potential and application prospects. Among them, pure copper has excellent electrical conductivity, but its mechanical strength is relatively low, while improving the strength of copper alloys is at the expense of electrical conductivity. Therefore, how to greatly increase the strength of the alloy while maintaining high conductivity is the main direction of modern copper alloy research. The current solutions focus on making the added second phase evenly and finely distributed in the Cu matrix, so as to improve the overall performance of the alloy. Nb has superconductivity, and can be uniformly and finely distributed...

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Problems solved by technology

Among them, the deformation composite method is difficult to mix the two phases of copper and niobium evenly in the billet making process, and the forming process is very complicated, which limits its wide application; the mechanical alloy method can obtain an alloy with a uniform and fine distribution of the second phase on the Cu matrix, but due to Long-term ball milling will not only cause serious oxygen pollution, but also cause bonding and agglomeration of the refined powder, which will lead to low density of the hot compact, thereby reducing the overall performance of the alloy