Lead-free, easily-cut and high-conductivity calcium-copper material

A high-conductivity, easy-to-cut technology, applied in the field of calcium copper materials, can solve the problems of inability to anneal, deterioration of copper weldability, difficulty in using oxyacetylene and resistance welding, etc., achieve good cold and hot processing performance, and improve reliability Cutting performance, the effect of excellent cutting performance

Active Publication Date: 2012-07-11
NINGBO XINGAODA ADVANCED METALLIC MATERIALS
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  • Claims
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Problems solved by technology

Tellurium has little effect on the electrical conductivity and thermal conductivity of copper, because tellurium can disperse the independent phase Cu 2 The presence of Te in copper makes chips easy to break and improves the machinability of copper, but tellurium copper can only be used in the processed state and cannot be annealed, because Cu 2 Te will precipitate along the grain boundary, making the material brittle. In addition, tellurium will deteriorate the weldability of copper, so it is not easy to use oxyacetylene and resistance welding

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  • Lead-free, easily-cut and high-conductivity calcium-copper material

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Embodiment Construction

[0023] The following describes the present invention in further detail with reference to the embodiments, but the present invention is not limited to the embodiments:

[0024] The method for preparing alloy material samples in the embodiment of the present invention is a conventional method in the industry, and the general process is: batching → industrial frequency induction electric furnace smelting → full continuous casting of φ103mm ingots → 630-ton extruder 830~860℃ extrusion →φ23→φ19→ φ17→φ15→φ14→φ13, the Ca used in the batching process is a copper-calcium master alloy with a Ca content of 18-22%, and a lanthanum-cerium alloy with a lanthanum content of 30-40%.

[0025] The comparative sample tellurium copper was also processed under the same process conditions.

[0026] The specific component content list of the lead-free free-cutting high-conductivity calcium copper of the present invention and the comparative example copper tellurium (Table 1).

[0027] The performance compar...

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Abstract

The invention discloses a lead-free, easily-cut and high-conductivity calcium-copper material. The material is characterized by consisting of the following components in percentage by weight: 0.1 to 1.0 percent of Ca, 0.01 to 0.1 percent of lanthanum-cerium alloy, less than 0.01 percent of Pb and the balance of copper and impurities, wherein the total amount of the impurities is not more than 0.06 percent; the sum of Cu and Ca is more than 99.90 percent; and the sum of Cu, Ca and the lanthanum-cerium alloy is more than 99.94 percent. The calcium-copper material has the advantages of high conductivity and cutting processing property, capability of being subjected to annealing treatment, and high weldability.

Description

Technical field: [0001] The invention relates to a lead-free, easy-cutting and high-conductivity (IACS%-85-93%) calcium copper material. Background technique: [0002] Precision electrical conductors not only require high electrical conductivity, but also require precise dimensions and smooth surfaces due to their complex shapes. Most of the materials used to manufacture these precision conductive devices need to be machined. Therefore, the materials are required to have both high conductivity and good cutting performance. At present, the materials used at home and abroad mainly include tellurium copper C14500, QTe0.5. and other materials. Tellurium has little effect on the electrical conductivity and thermal conductivity of copper. Because tellurium is dispersed as independent phase Cu 2 Te exists in the copper to make the chips easy to break and improve the machinability of copper. However, tellurium copper can only be used in the processed state and cannot be annealed because...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00
Inventor 彭锋夏宝平刘剑平冯斌张路
Owner NINGBO XINGAODA ADVANCED METALLIC MATERIALS
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