Copper-nickel alloy coin product with surface coating and manufacturing method thereof
A copper-nickel alloy and manufacturing method technology, applied in coins, clothing, jewelry, etc., can solve the problems of high price, unsuitable for promotion and application, and high cost, and achieve the effects of color electromagnetic performance, material cost reduction, and color stability.
Active Publication Date: 2019-08-20
NANJING BANKNOTE MINTING +1
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Problems solved by technology
Because copper and nickel as alloy materials can significantly improve the strength, corrosion resistance and hardness of the material, and as coinage materials, they have the advantages of high corrosion resistance, good circulation performance, metallic color and unique electromagnetic properties. At present, the traditional rolled copper-nickel alloy Materials have been used in some high-denomination coins in the field of minting, but they are expensive and costly, so they are not suitable for promotion and application
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[0030] like figure 1 As shown, the surface-coated copper-nickel alloy coin product of the present invention, the surface-coated copper-nickel alloy coin product includes a core body 1 and a coating layer 2 coated on the surface of the core body 1; the coating Layer 2 is the electroplated nickel layer and copper layer from the inside to the outside or the alloy layer formed by heat treatment after the electroplated copper layer and the nickel layer from the inside to the outside; the thickness of the cladding layer is 20 μm to 45 μm.
[0031] Further, the material of the core body 1 in the present invention is one of steel, stainless steel, copper, copper alloy, nickel, and nickel alloy.
[0032] A method for manufacturing a surface-coated copper-nickel alloy coin product, the method comprising the following steps:
[0033] 1) The formed core is sequentially subjected to electrolytic degreasing, alkali cleaning, pickling and water rinsing;
[0034] 2) Nickel or pure copper is...
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Abstract
The invention relates to the technical field of coin or badge manufacturing, and discloses a coin type product with the surface coated with a copper-nickel alloy. The coin type product with the surface coated with the copper-nickel alloy comprises a core body and a covering layer covering the surface of the core body, wherein the covering layer is an alloy layer formed by plating a nickel layer and a copper layer in sequence from inside to outside or plating the copper layer and the nickel layer in sequence from inside to outside and then performing thermal treatment; the covering layer has a thickness of 20 to 45 [mu]m. The coin type product with the surface coated with the copper-nickel alloy has corrosion resistance, negotiability, color stability and electromagnetism. According to a manufacturing method of the coin type product with the surface coated with the copper-nickel alloy, the surface of a metal core body material is plated and coated with the copper-nickel alloy plated layer, so that the advantages of the coin type product on the aspect of the corrosion resistance, the negotiability, the color and the like are guaranteed; moreover, the process can be further simplified, and the material cost is substantially reduced.
Description
technical field [0001] The invention relates to the technical field of coin or badge manufacturing, in particular to a surface-coated copper-nickel alloy coin product and a manufacturing method thereof, specifically including the manufacture of coin products such as coins, badges or tokens. Background technique [0002] Metal coinage has a history of thousands of years in our country. The earliest metal coinage is the Baode copper shell of the Shang Dynasty, which has been more than 3,000 years ago. Because metal coins have the advantages of convenient use, wear resistance, and long circulation life, they have been given currency functions since ancient times. However, in addition to its currency function, metal coins also have high artistic appreciation and collection value preservation functions; in addition, badges, game coins, token coins, etc. are also new functions of metal coins. [0003] As a new type of material, electroplating cladding materials have been widely u...
Claims
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IPC IPC(8): C25D5/12C25D5/50C25D7/00C25D5/34C25D3/40C25D3/12A44C21/00
Inventor 谭伟伟周忻毛英颜晓蕊
Owner NANJING BANKNOTE MINTING