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High-strength and high-conductivity copper-chromium-zirconium alloy and preparation method thereof

A high-conductivity, copper-chromium-zirconium technology, used in the preparation of high-strength and high-conductivity copper-chromium-zirconium alloys and their strips, lead frames, and connectors, can solve problems such as insufficient comprehensive performance, and achieve good elastic performance, comprehensive Good performance and the effect of inhibiting alloy cracking

Active Publication Date: 2017-09-05
NINGBO POWERWAY ALLOY PLATE & STRIP CO LTD
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  • Abstract
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Problems solved by technology

) strip products can achieve a yield strength of 400MPa, an electrical conductivity of about 80% IACS, and a softening temperature of about 500°C, but its comprehensive performance still cannot meet the current product requirements

Method used

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  • High-strength and high-conductivity copper-chromium-zirconium alloy and preparation method thereof

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Embodiment Construction

[0032] Below in conjunction with embodiment the present invention is described in further detail.

[0033] 20 example alloys and 1 comparative example alloy (C18150) were selected, all of which were processed into finished strip products with a thickness of 2.0 mm by the preparation method of the present invention. The process flow for preparing the high-strength and high-conductivity copper-chromium-zirconium alloy strip of the present invention is: batching→melting and casting→sawing→homogenizing annealing→hot rolling→primary solution treatment→face milling→primary cold rolling→second solution treatment→ Secondary cold rolling→primary aging treatment→tertiary cold rolling→secondary aging treatment→stretch leveling, which specifically includes the following steps:

[0034] 1) Batching and melting and casting: Prepare raw materials and batching according to the chemical composition of the alloy, and use an electric furnace for melting. The order of adding the alloy is: first a...

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Abstract

The invention discloses a high-strength high-conductivity copper-chromium-zirconium alloy and a preparation method of a plate / strip thereof. This alloy comprises the chemical composition: 0.01-1.5 wt% of Cr, 0.01-0.5 wt% of Zr, 0.001-0.5 wt% of Ti, 0.01-0.5 wt% of Mn, 0.0001-0.07 wt% of Ca, and the balance of copper and unavoidable impurities; the position and process of the Cu-Cr-Zr alloy are optimized, the provided high-strength high-conductivity copper-chromium-zirconium alloy retains high conductivity (above 80% IACS), elastic modulus up to higher than 130 GPa, softening temperature resistance up to higher than 500 DEG C, yield strength up to higher than 550 MPa and hardness up to 160 HV, the copper-chromium-zirconium plate / strip is imparted high strength, high conductivity and excellent comprehensive performance, this comprehensive performance meets the requirements of products such as a lead frame and a connector upon base material stamping and machining performances, and this plate / strip material is mainly applied to electronic components such as connectors and lead frames.

Description

technical field [0001] The invention relates to the technical field of high-strength and high-conductivity copper alloys and their preparation, in particular to a method for preparing high-strength and high-conductivity copper-chromium-zirconium alloys and strips thereof, which are mainly used in lead frames, connectors, and the like. Background technique [0002] In recent years, with the continuous development of electronic technology, the application of connectors and lead frames in industries such as automobiles, electrical appliances, and communication base stations has become more and more attractive. The speed is getting faster and faster, and they are all developing in the direction of high density, miniaturization, thinning, combination, and high speed. [0003] Copper alloy materials for connectors are mainly selected from three categories: brass, phosphor bronze, and beryllium bronze according to their use environment and performance requirements. With the develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22F1/08
CPCC22C9/00C22F1/08
Inventor 胡仁昌赵红彬周银银钟磊刘隆兵王继军廖学华
Owner NINGBO POWERWAY ALLOY PLATE & STRIP CO LTD
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