Copper-based composite powder of high-strength and high-corrosion-resistance copper-based monotectic alloy formed by selective laser melting

Abstract

The invention discloses copper-based composite powder of a high-strength and high-corrosion-resistance copper-based monotectic alloy formed by selective laser melting. The composite powder is characterized in that the high-strength and high-corrosion-resistance copper-based monotectic alloy is prepared by using the copper-based composite powder with the particle size of 40-50 mu m as a forming material and adopting a selective laser melting forming method. The copper-based composite powder has the advantages that the copper-based composite powder is suitable for the process characteristic of the ultrahigh cooling rate of selective laser melting forming, can be used for forming the copper-based monotectic alloy with a complex shape, a large structural size, high strength, high corrosion resistance and no cracks through the selective laser melting under the condition of high efficiency, and has a wide application prospect in the fields of electromagnetic gun guide rails, pantographs and the like.

Description

technical field [0001] The invention belongs to the technical field of laser additive manufacturing (3D printing), and in particular relates to a copper-based composite powder formed by laser selective melting to form a high-strength and high-corrosion-resistant copper-based monotectic alloy. Background technique [0002] At present, there are more than 500 kinds of immiscible alloy systems with two-phase immiscible regions. When such alloy melts are supercooled to the two-phase immiscible regions, they can spontaneously separate into two melts: secondary Phase L1, main phase L2. Among them, copper alloys such as Cu-Fe, Cu-Ag, Cu-Sn, Cu-Pb, etc. have attracted widespread attention because of their good plasticity and toughness, good electrical and thermal conductivity. [0003] However, during solidification, microstructure segregation is still an essential defect in monotectic alloys. In order to overcome this problem, researchers at home and abroad have proposed many met...

AI Technical Summary

Problems solved by technology

At present, there is no copper-based composite powder that is fully suitable for laser selective melting and forming, and can be successfully used to prepare large-sized, high-strength, high-corrosion, crack-free, homogeneous copper-based monotectic alloys.