Nickel silver alloy and processing technique

A processing technology, the technology of zinc white copper, applied in the field of coinage, can solve the problems of poor corrosion resistance, achieve excellent processing performance and corrosion resistance, avoid component segregation, and improve the effect of strength and hardness
CN1796582AInactive Publication Date: 2006-07-05CHINA BANKNOTE PRINTING & MINTING
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA BANKNOTE PRINTING & MINTING
Publication Date
2006-07-05
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

This invention relates to a zincum-white copper alloy and its processing technique. It comprises of 67~69wt% of Cu, 14~16wt% of Ni and 15~19wt% of zincum. Due to the creativity in weight percentage of the Cu-Ni-Zn ternary alloy in this invention, the alloy shows a considerably silvery color, an outstanding strength, wear resistance, corrosion resistance and discoloration resisting properties. This invention stressed a raw materials cost as low as possible, meanwhile assures excellent founding properties, corrosion resisting properties and coin processing properties.
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Description

technical field

[0001] The invention relates to a zinc-nickel-nickel alloy and a processing technology thereof, which can be applied to the field of coinage. Background technique

[0002] Ordinary white copper is the earliest white copper alloy used in coinage in various countries in the world, mostly B19 and B25 alloys. Production of circulating commemorative coins such as "China Construction Bank". This type of alloy is a single-phase copper-nickel binary alloy composed of different ratios of copper and nickel elements. It is characterized by good processing performance and a silver-white color that people prefer. However, this type of alloy has a high nickel content, resulting in high cost.

[0003] According to the literature records published in July 1983 by the Encyclopedia of Metal Knowledge Science Popularization Press: German Silver is a foreign silver, also known as nickel-nickel copper or nickel silver, containing 5-33% nickel and 50-70% copper , zinc 13-35%, t...

Claims

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