A kind of high-strength and high-conductivity rare earth copper alloy cu-cr-zr-y and its preparation method

Abstract

The invention discloses a high-strength and high-conductivity rare earth copper alloy Cu-Cr-Zr-Y and a preparation method thereof. The preparation method comprises the following steps: step (1): placing pure copper, chromium raw materials, zirconium raw materials and yttrium raw materials in In an intermediate frequency induction melting furnace, smelting is carried out in an atmospheric environment, and a rare earth copper-chromium-zirconium alloy ingot is obtained after melting; step (2): performing solid solution treatment on the rare earth copper-chromium-zirconium alloy ingot to obtain a rare earth copper-chromium-zirconium alloy ingot Billet; step (3) alternately rolling and aging the rare-earth copper-chromium-zirconium alloy billet to prepare a high-strength and high-conductivity rare-earth copper alloy Cu-Cr-Zr-Y. The high-strength and high-conductivity rare earth copper alloy Cu‑Cr‑Zr‑Y is prepared by the above method. The rare earth copper alloy prepared by the invention has superior performance, the tensile strength exceeds 700 MPa, and the relative conductivity is higher than 80% IACS, which can meet the performance requirements of the industry for high-strength and high-conductivity copper alloys, and meet the high-performance cutting-edge technology requirements; simultaneous preparation and processing process It is also conducive to industrialized large-scale production of high-strength and high-conductivity copper-chromium-zirconium alloys.

Description

technical field [0001] The invention relates to the technical field of rare earth copper alloys. Specifically, it is a high-strength and high-conductivity rare earth copper alloy Cu-Cr-Zr-Y and a preparation method thereof. Background technique [0002] Copper and copper alloys are widely used in large-scale integrated circuit lead frames and high-speed track contact wires because of their good electrical and thermal conductivity, high strength and good plasticity. With the rapid development of my country's electronics industry and high-speed railways, higher requirements have been placed on the performance of copper alloys. In engineering, it has been hoped to obtain isotropy, tensile strength exceeding 600MPa, and relative conductivity greater than 80% ICSA, Copper alloys that can meet large-scale production. Japan has already developed a method of producing copper-chromium-zirconium alloys using non-vacuum production technology, and has successfully developed several hig...

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Problems solved by technology

[0003] For this reason, the technical problem to be solved by the present invention is to provide a high-strength and high-conductivity rare earth copper alloy Cu-Cr-Zr-Y and its preparation method to solve the problem that the high strength and high conductivity of ordinary copper-chromium-zirconium alloys are difficult to coexist. Provide a high-strength and high-conductivity copper alloy that can meet the needs of high-performance cutting-edge technology and a method that is conducive to industrialized large-scale production of high-strength and high-conductivity copper-chromium-zirconium alloys

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