Non-rusting silver alloy and preparation method thereof

A silver alloy, anti-tarnish technology, applied in the field of metal materials, to achieve the effect of reducing production costs, simple ingredients, and low manufacturing costs

Inactive Publication Date: 2015-12-09
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an anti-tarnish silver alloy and its preparation method, which is used to solve the lack of simple components, good processability, good anti-tarnish performance and low cost in the prior art. Problems with tarnish-resistant silver alloys and methods for their preparation

Method used

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  • Non-rusting silver alloy and preparation method thereof
  • Non-rusting silver alloy and preparation method thereof
  • Non-rusting silver alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The formulation of the anti-tarnish silver alloy material is as follows: silver 92.5%, copper 0.5%, zinc 0.5%, tin 0.5%, indium 1.5%, germanium 4.5%.

[0051] The components of each element are weighed and mixed according to the above ratio, and the vacuum induction melting method is used for high-frequency vacuum melting, and the vacuum degree is greater than or equal to 10 -2Pa, the melting temperature is 950-1050°C. After the alloy is completely melted, it is filled with high-purity argon as a protective atmosphere, and cast into silver alloy ingots. Then the silver alloy ingot was homogenized and heat-treated at 720° C. for 8 hours, and then cold-rolled at room temperature to make a silver alloy sheet. After the silver alloy sheet was annealed and heat-treated at 650°C for 0.5 hour, an anti-tarnish silver alloy sample 1# was prepared.

[0052] The prepared anti-tarnish silver alloy sample 1# of the present embodiment is placed in 0.1mol / lNa 2 Soak and corrode in ...

Embodiment 2

[0054] The formulation of the anti-tarnish silver alloy material is as follows: silver 92.5%, copper 3.4%, zinc 1.5%, tin 0.4%, indium 2.0%, germanium 0.2%.

[0055] Each element component is weighed and mixed according to the above ratio, and the vacuum induction melting method is used for high-frequency vacuum melting, and the vacuum degree is greater than or equal to 10 -2 Pa, the melting temperature is 950-1050°C. After the alloy is completely melted, it is filled with high-purity argon as a protective atmosphere, and cast into silver alloy ingots. Then the silver alloy ingot was homogenized and heat-treated at 720° C. for 8 hours, and then cold-rolled at room temperature to make a silver alloy sheet. After annealing the silver alloy sheet at 650° C. for 0.5 hour, an anti-tarnish silver alloy sample 2# was prepared.

[0056] The prepared anti-tarnish silver alloy sample 2# of the present embodiment is placed in 0.1mol / lNa 2 Soak and corrode in the S aqueous solution med...

Embodiment 3

[0058] The formulation of the anti-tarnish silver alloy material is as follows: silver 92.5%, copper 4.2%, zinc 0.8%, tin 0.2%, indium 2.0%, germanium 0.3%.

[0059] Each element component is weighed and mixed according to the above ratio, and the vacuum induction melting method is used for high-frequency vacuum melting, and the vacuum degree is greater than or equal to 10 -2 Pa, the melting temperature is 950-1050°C. After the alloy is completely melted, it is filled with high-purity argon as a protective atmosphere, and cast into silver alloy ingots. Then the silver alloy ingot was homogenized and heat-treated at 720° C. for 8 hours, and then cold-rolled at room temperature to make a silver alloy sheet. After annealing the silver alloy sheet at 650° C. for 0.5 hour, an anti-tarnish silver alloy sample 3# was prepared.

[0060] The prepared anti-tarnish silver alloy sample 3# of the present embodiment is placed in 0.1mol / lNa 2 Soak and corrode in the S aqueous solution med...

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Abstract

The invention provides non-rusting silver alloy. The non-rusting silver alloy comprises, by weight, 90.0-92.5% of silver, 0.5-5% of copper, 0.5-2.0% of zinc, 0.2-1.1% of tin, 1.0-3.0% of indium and 0.1-6% of germanium. The invention further provides a preparation method for the non-rusting silver alloy and the application of the non-rusting silver alloy. According to the non-rusting silver alloy and the preparation method thereof, the compositions are simple and do not contain precious metal and rare metal; the non-rusting silver alloy is suitable for making contact with human body skin; good machinable property is achieved; the non-rusting property of the non-rusting silver alloy is over twice that of Sterling silver, so that the non-rusting silver alloy is suitable for being applied to the industries of jewelries, decorations and the like.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to an anti-discoloration silver alloy and a preparation method thereof, in particular to an anti-sulfurization and anti-discoloration silver alloy suitable for jewelry, decorations, etc. and a preparation method thereof. Background technique [0002] As a precious metal, silver has a white luster and is not easy to oxidize. It has stable chemical properties, good thermal conductivity and electrical conductivity, is not easily corroded by chemicals, and is soft and easy to process. Therefore, silver and silver alloys are widely used in jewelry, handicrafts, tableware, etc. . At the same time, compared with gold and platinum, which are often used as jewelry materials, the price of silver is very different, so the price factor is also one of the main reasons why silverware and silver jewelry are more popular among ordinary people. [0003] Pure silver is not easily oxidized even...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/18C22C21/10C22C1/02C22F1/057C22F1/053C22F1/04
Inventor 金明江金学军李伟
Owner SHANGHAI JIAO TONG UNIV
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