Precipitation-hardening copper alloy and application thereof

Abstract

The invention discloses a precipitation-hardening copper alloy which is prepared from the components in percentage by weight: 80 percent to 95 percent of Cu, 0.05 percent of to 4.0 percent of Sn, 0.01percent of to 3.0 percent of Ni, 0.01 to 1.0 percent of Si, and the balance Zn and inevitable impurities. According to the precipitation-hardening copper alloy provided by the invention, through solid solution strengthening and precipitation hardening, a combination performance of the alloy is improved, the matrix strength is improved, meanwhile, the influence on the conductivity of the alloy isless, a bending processing performance meets the requirement, and the alloy has a stress relaxation property as same as tin-phosphor bronze. The alloy provided by the invention has a better combination performance than C51900, is low in raw material cost, has remarkable advantages in welding and electroplating, can solve the utilization problem of multiple waste materials, and is widely applied toelectronic and electrical industry products such as connectors and connector assemblies.

Description

technical field [0001] The invention relates to the technical field of copper alloys, in particular to a high-strength precipitation-strengthened copper alloy and its application. Background technique [0002] In recent years, with the development of the electronics and electrical industries, various mechanical and electrical wiring has become more complicated and highly integrated, and the requirements for further lightening and improving reliability of electrical and electronic components such as connectors, relays, and switches have become more and more popular. Pay attention to. In particular, connectors and sockets used in tablet PCs and mobile phones, etc., require space-saving and high-performance at the same time, and the thickness of copper alloy plates and strips is required to develop toward thinner sheets, which have a negative impact on the elastic properties and reliability of copper alloys. Performance puts forward higher requirements. Specifically, miniatur...

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Problems solved by technology

Phosphor bronze is a copper alloy widely used in connectors, terminals and other fields at present. The Sn contained in phosphor bronze has a solid solution strengthening effect, and combined with cold deformation hardening, it makes phosphor bronze have higher strength, but Sn affects the conductivity of phosphor bronze. , the conductivity of phosphor bronze is generally below 20% IACS, and the price of Sn is relatively high, so the application of phosphor bronze is limited

The beryllium contained in beryllium bronze is poisonous, and beryllium bronze is expensive, so it is generally only used in some fields that require high elastic properties and strength

Copper-nickel-silicon alloy is developed as an aging precipitation-strengthened alloy to replace beryllium bronze, but its processing cost is high, and it is usually used in the field of high-end connectors that require high strength and electrical conductivity.

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