High-strength high-conductivity copper base alloy and preparation method thereof

Abstract

The invention relates to a high-strength high-conductivity copper base alloy and a preparation method thereof. The copper base alloy is characterized by consisting of the following components in percentage by weight: 0.05-0.15% of Fe, 0.015-0.06% of P, 0.008-0.045% of Zn, 0.005-0.05% of Sn, 0.005-0.04% of Ni, no more than 0.2% of impurity element in total and the balance of Cu. The copper base alloy provided by the invention has high strength and high conductivity as well as high strength and electric conductivity. After being smelted, the elements form a complicated order composite structure in a copper base, and the hardness and conductivity of the C19210 alloy is greatly improved after an aging process.

Description

technical field

[0001] The invention relates to a high-strength and high-conductivity copper-based alloy and a preparation method thereof. Background technique

[0002] At present, copper-based lead frame materials mainly adopt the principle of complex alloying to improve the strength and comprehensive performance of the alloy under the premise of sacrificing electrical conductivity. At present, there are more than 100 kinds of copper alloys for lead frames developed at home and abroad, which can be basically divided into high-conductivity type, medium-conductivity medium-strength type, low-conductivity medium-strength type and high-strength type according to the performance of the material. At present, only three kinds of C19210, C1220 and Cl9400 are widely used. Among them, Cu-Fe-P system C19210 (Cu-0.1Fe-0.03P) is one of the most representative high-conductivity materials, with a conductivity of about 85%IACS, a strength of about 400MPa, and a hardness of about HV120. H...