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

Inactive Publication Date: 2006-07-05
CHINA BANKNOTE PRINTING & MINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) When the content of nickel and zinc is low, such as: when the zinc content is less than 20% and the nickel content is 5%, the alloy is a yellow copper alloy, and the corrosion resistance of the alloy is poor

Method used

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  • Nickel silver alloy and processing technique
  • Nickel silver alloy and processing technique

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Composition of the present invention (by weight percentage):

[0048] Cu67%, Ni14%, Zn19%.

[0049] The processing technique of zinc-nickel-nickel alloy of the present invention:

[0050] 1. Alloy smelting process

[0051] (1), raw materials: electrolytic copper, electrolytic nickel, zinc ingot, Cu-Mg

[0052] (2), technical conditions and parameters:

[0053] Billet specification: 420×16×Lmm

[0054] Melting temperature: 1300~1320℃

[0055] Deoxidizer: Cu-Mg, Cu-Mn master alloy

[0056] Covering agent: carbonized charcoal

[0057] (3) The order of feeding: electrolytic copper → electrolytic nickel → zinc ingot → Cu-Mn alloy → slag removal → sampling analysis → temperature measurement → adding charcoal and blowing out the furnace.

[0058] 2. Horizontal continuous casting

[0059] (1), drawing temperature: 1230 ℃

[0060] (2), casting procedure

[0061] Pull 15.00mm 1s

[0062] Stop 1 1s

[0063] Reverse thrust 1 1mm 0.1s

[0064] Stop 2 2s

[0065] Revers...

Embodiment 2

[0073] The composition (by weight percentage) of optimal value of the present invention:

[0074] Cu68%, Ni15%, Zn17%.

[0075] The processing technique of zinc-nickel-nickel alloy of the present invention:

[0076] 1. Alloy smelting process

[0077] (1), raw materials: electrolytic copper, electrolytic nickel, zinc ingot, Cu-Mg

[0078] (2), technical conditions and parameters:

[0079] Billet specification: 420×16×Lmm

[0080] Melting temperature: 1320°C

[0081] Deoxidizer: Cu-Mg, Cu-Mn master alloy

[0082] Covering agent: carbonized charcoal

[0083] (3) The order of feeding: electrolytic copper → electrolytic nickel → zinc ingot → Cu-Mn alloy → slag removal → sampling analysis → temperature measurement → adding charcoal and blowing out the furnace.

[0084] 2. Horizontal continuous casting

[0085] (1), drawing temperature: 1250 ℃

[0086] (2), casting procedure

[0087]Pull 15.00mm 1s

[0088] Stop 1 1s

[0089] Reverse thrust 1 1mm 0.1s

[0090] Stop 2 2s ...

Embodiment 3

[0098] Composition of the present invention (by weight percentage):

[0099] Cu69%, Ni16%, Zn15%.

[0100] Its processing technology is with embodiment 1.

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C9/04C22C1/02
Inventor 刘迪魏立营张吉刚罗宝华
Owner CHINA BANKNOTE PRINTING & MINTING
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