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Copper based precipitation hardening alloy

A precipitation hardening and alloying technology, which is applied in the field of copper-based precipitation hardenable alloys, can solve the problems of poor copper conductivity and copper softness, and achieve the effect of improving conductivity and mechanical properties

Inactive Publication Date: 2006-07-19
OUTOKUMPU COPPER PROD
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  • Claims
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Problems solved by technology

Also high purity copper is too soft for applications requiring high strength mechanical properties and annealing resistance
Direct alloying of copper has considerable drawbacks, as direct alloying leads to poor electrical conductivity of copper

Method used

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  • Copper based precipitation hardening alloy
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Embodiment Construction

[0013] The addition of phosphorus up to 500 ppm to Cu-based precipitation hardenable alloys containing Cr, Zr and Ti has a direct effect on the electrical conductivity of the alloy. The addition of P can reduce the solubility of alloying elements Cr, Zr or Ti in the final crystal structure of face centered cubic Cu. For example Cr forms thermally stable phosphides such as Cr 3 P and CrP 4 , but does not form complex phosphides with copper. One reason is that the final crystal structure of Cr is body centered cubic (bcc) instead of face centered cubic (fcc) of Cu.

[0014] In the presence of P, the solubility of Cr in Cu is as figure 1 As shown, it is referenced from Villars P., Prince A., Okamoto H., Ternary Alloy Phase Diagrams Handbook (Thernary Alloy Phase Diagrams), Vol7&8, AsM International, Metals Park (OH), 1998. figure 1 Indicates the additive Cu-Cr-P ternary alloy at 600 °C near the copper endpoint, "additive" means that the ternary interaction is neglected, and t...

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Abstract

The invention relates to a copper based precipitation hardenable alloy containing at least one of the elements chromium, zirconium or titanium, wherein the copper based precipitation hardenable alloy is alloyed by phosphorus.

Description

technical field [0001] The present invention relates to at least one copper-based precipitation-hardenable alloy having improved high-strength mechanical properties and annealing resistance. Background technique [0002] Japanese Patent Publication JP06-212374 discloses a method for preparing a copper-based precipitation-hardenable alloy that can be used as a material for small electrical and electronic components. The alloy contains: by weight percentage, Ni 2-4%, Si 0.5-1.0%, Zn 0.1-1.0%, Al 0.001-0.15%, Mn 0.01-0.1%, Cr 0.001-0.1%. Due to the presence of multiple alloying elements, the production cost of the alloy is higher than that of alloys containing fewer alloying elements. [0003] The copper-based precipitation-hardenable alloy disclosed in British Patent GB609900 contains by weight percentage: Cr 0.25-1.5%, the content of deoxidizer Zn, B, Na, Li and P is not more than 0.2% and strengthening elements Ni, Fe or The content of Co is 0.1-5.0%. The electrical condu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00
CPCC22C9/00
Inventor R·尼泊特B·斯万克M·吉塔
Owner OUTOKUMPU COPPER PROD
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