A kind of anti-discoloration and wear-resistant copper alloy and preparation method thereof

A wear-resistant copper and anti-tarnish technology, applied in metal rolling, manufacturing tools, temperature control, etc., can solve problems such as lack of

Active Publication Date: 2022-07-26
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the analysis of the existing coinage alloy materials in various countries, the commonly used coinage alloy materials mainly include brass, bronze and copper-nickel alloy, and the colors are mainly yellow and white, lacking copper alloy materials of other colors.

Method used

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  • A kind of anti-discoloration and wear-resistant copper alloy and preparation method thereof
  • A kind of anti-discoloration and wear-resistant copper alloy and preparation method thereof

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preparation example Construction

[0032] The present invention also provides a method for preparing the anti-discoloration and wear-resistant copper alloy according to the above technical solution, comprising the following steps:

[0033] (1) smelting and casting the copper alloy raw material successively to obtain an ingot;

[0034] (2) hot-rolling the ingot obtained in the step (1) after homogenization treatment to obtain a hot-rolled alloy;

[0035] (3) The hot-rolled alloy obtained in the step (2) is sequentially subjected to intermediate annealing, cold rolling and finished annealing to obtain a discoloration-resistant and wear-resistant copper alloy.

[0036] In the present invention, the copper alloy raw materials are sequentially smelted and cast to obtain an ingot.

[0037] The present invention does not have a special limitation on the type of the copper alloy raw material, and the corresponding metal or intermediate alloy may be used according to the composition of the alloy. In the present invent...

Embodiment 1

[0055] Alloy composition (mass percent): Ni 4%, Al 6%, Si 0.15%, In 0.01%, Nd 0.05%, and the balance Cu.

[0056] making process:

[0057] (1) Add electrolytic copper, electrolytic nickel, pure aluminum and copper-silicon master alloy into a vacuum induction furnace for smelting. After the above materials are melted, add pure indium and copper-neodymium master alloy, and smelt at 1300 ° C. After complete melting, stir uniformly to obtain alloy melt;

[0058] (2) casting the alloy melt obtained in step (1) at 1200° C. for 30 min to obtain an ingot;

[0059] (3) placing the ingot obtained in step (2) in a box furnace, carrying out homogenization treatment at 950 ° C, and cooling to room temperature in the air after holding for 8 h to obtain a homogenized ingot;

[0060] (4) placing the homogenized ingot obtained in step (3) in a box furnace, hot rolling at 850° C. with a total processing rate of 80%, and cooling to room temperature after holding for 2 hours to obtain a hot-rol...

Embodiment 2

[0065] Alloy composition (mass percent): Ni 8%, Al 2%, Si 0.5%, In 0.1%, Nd 0.01%, and the balance Cu.

[0066] making process:

[0067] (1) Add electrolytic copper, electrolytic nickel, pure aluminum and copper-silicon master alloy into a vacuum induction furnace for smelting. After the above materials are melted, pure indium and copper-neodymium master alloy are added, and smelted at 1350 ° C. After complete melting, stir uniformly to obtain alloy melt;

[0068] (2) casting the alloy melt obtained in step (1) at 1250° C. for 30 min to obtain an ingot;

[0069] (3) placing the ingot obtained in step (2) in a box furnace, carrying out homogenization treatment at 800° C., keeping the temperature for 12 hours and then air-cooling to room temperature to obtain a homogenized ingot;

[0070] (4) placing the homogenized ingot obtained in step (3) in a box furnace, hot-rolling at 950° C. with a total processing rate of 95%, and cooling to room temperature after holding for 2 hours ...

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Abstract

The invention belongs to the technical field of copper alloy materials, and provides a discoloration-resistant and wear-resistant copper alloy. The copper alloy is rose-colored by adding Ni and Al elements, the wear resistance and discoloration resistance of the alloy are improved by adding Si elements, and In, Two or more of Nd, Sn and La form an oxide film on the surface of the alloy, thereby preventing the color change of the alloy during use, and at the same time improving the corrosion resistance of the alloy. Copper alloy material with excellent discoloration resistance, corrosion resistance and wear resistance. The results of the examples show that the discoloration-resistant and wear-resistant copper alloy provided by the present invention has a tensile strength of 450 MPa, an elongation of 32%, an electrical conductivity of 17%, a Brinell hardness of 118HB, and a chromaticity parameter of 80 / 9 / 12, the corrosion rate is 0.47g / m 2 h.

Description

technical field [0001] The invention relates to the technical field of copper alloy materials, in particular to a discoloration-resistant and wear-resistant copper alloy and a preparation method thereof. Background technique [0002] With the development of the economy, the country's demand for coin materials is also getting higher and higher. In addition to circulating coins, more and more commemorative coins and medals need to be developed. Therefore, more coinage materials need to be developed. When selecting coinage materials, it is usually necessary to consider the physical properties, anti-discoloration properties, corrosion resistance properties, forming process properties, anti-counterfeiting properties, anti-wear properties, production costs, hygienic properties, etc. of the materials. Indexes such as resistance, corrosion resistance, and machinability are the issues that are more concerned in the design of coins. [0003] Copper and its alloys are currently the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/06C22C9/01C22C1/03C22F1/08C21D9/00B21B37/74B21B3/00
CPCC22C9/06C22C9/01C22F1/08C22C1/03C21D9/0081B21B3/00B21B37/74B21B2003/001
Inventor 彭丽军解浩峰黄国杰米绪军黄树晖
Owner GRIMAT ENG INST CO LTD
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