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A kind of preparation technology of anti-oxidation discoloration silver alloy

A preparation process and silver alloy technology, which is applied in the field of preparation process of anti-oxidation and discoloration silver alloy, can solve the problems of high cost and low mechanical performance

Active Publication Date: 2016-05-11
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this formula can improve the structure of the alloy, refine the grains, purify the grain boundaries, and improve the ability to resist oxidation and discoloration, the alloy uses a large amount of rare earth metal elements such as germanium, yttrium, cerium, lanthanum and cobalt for alloying, and the cost is still High, while the mechanical properties are not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Its specific manufacturing process of an anti-tarnish silver alloy comprises the following steps:

[0014] 1) Prepare materials;

[0015] 2) Vacuum melting: Weigh 87g of silver, 0.5g of tin and 2g of ruthenium, heat and melt in a vacuum furnace respectively, control the temperature at 500°C, and vacuum degree of 0.001Mpa; then mix and stir evenly in a vacuum environment to make 89.5g of silver- Tin-ruthenium ternary alloy liquid;

[0016] 3) Take 10g of ternary alloy liquid, and add 1g of zinc, 3g of vanadium, 5g of manganese, and 1.5g of indium in the above-mentioned weight components to it under normal pressure, and control the temperature at 1000°C; mix and stir evenly, keep warm ;

[0017] 4) Add the intermediate alloy liquid in step 3) to the remaining ternary alloy liquid in step 2); control the vacuum degree to 0.001Mpa, and use the residual heat of the intermediate alloy liquid to stir rapidly for 10 minutes; release the final silver alloy Liquid, cooling and...

Embodiment 2

[0019] Its specific manufacturing process of an anti-tarnish silver alloy comprises the following steps:

[0020] 1) Prepare materials;

[0021] 2) Vacuum melting: Weigh 93g of silver, 0.5g of tin and 1.5g of ruthenium, heat and melt in a vacuum furnace respectively, control the temperature at 1000°C, and vacuum degree of 0.001Mpa; then mix and stir evenly in a vacuum environment to make 95g of silver- Tin-ruthenium ternary alloy liquid;

[0022] 2) Take 9.5g of ternary alloy liquid, add 1.9g of zinc, 0.5g of vanadium, 2g of manganese, and 0.6g of indium to it under normal pressure, and control the temperature at 1400°C; mix and stir Uniform, heat preservation;

[0023] 3) Add the intermediate alloy liquid in step 3) to the remaining ternary alloy liquid in step 2); control the vacuum degree to 0.001Mpa, and use the residual heat of the intermediate alloy liquid to stir rapidly for 10 minutes; release the final silver alloy Liquid, cooling and molding under normal pressure ...

Embodiment 3

[0025] Its specific manufacturing process of an anti-tarnish silver alloy comprises the following steps:

[0026] 1) Prepare materials;

[0027] 2) Vacuum melting: Weigh 87g of silver, 0.7g of tin and 3.5g of ruthenium, heat and melt in a vacuum furnace respectively, control the temperature at 800°C, and vacuum degree of 0.001Mpa; then mix and stir evenly in a vacuum environment to make 91.2g of silver - tin-ruthenium ternary alloy liquid;

[0028] 2) Take 18g of ternary alloy liquid, add 2.2g of zinc, 1.5g of vanadium, 2g of manganese, and 3.1g of indium to it under normal pressure, and control the temperature at 1200°C; mix and stir evenly , insulation;

[0029] 3) Add the intermediate alloy liquid in step 3) to the remaining ternary alloy liquid in step 2); control the vacuum degree to 0.001Mpa, and use the residual heat of the intermediate alloy liquid to stir rapidly for 10 minutes; release the final silver alloy Liquid, cooling and molding under normal pressure to obt...

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PUM

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Abstract

The invention belongs to the field of alloy, and provides a preparation process for oxidation and discoloration resistant silver alloy. The process specifically comprises the following steps: 1, preparing material; 2, heating and melting silver, tin and ruthenium in a vacuum melting furnace to prepare into a silver-tin-ruthenium ternary alloy solution; 3, taking respectively adding zinc, vanadium, manganese and indium weighed in parts into the taken ternary alloy solution under normal pressure, uniformly mixing and stirring, and performing heat preservation; 4, adding the intermediate alloy solution obtained in the step 3 into the residual ternary alloy solution in the step 2 to obtain a final silver alloy solution, and cooling under normal pressure and forming to obtain a silver alloy block. The silver alloy provided by the invention is good in oxidation and discoloration resistance the melting point of the silver alloy can be reduced, mechanical performance and processing performance of the alloy can be improved, the situation that the alloy is hard can be improved, and the silver alloy is corrosion resistant and oxidation resistant.

Description

technical field [0001] The invention relates to a preparation process of an anti-oxidation discoloration silver alloy, which belongs to the field of alloys. Background technique [0002] Silver is the most widely distributed element among precious metals, containing twenty times more than gold. Adding other alloying elements to silver can improve the performance of silver, such as copper can increase the hardness of silver, lower the melting point, and improve castability. Therefore, silver alloy materials are widely used in jewelry, silverware, photography, electrical and electronic, electroplating and medical industries, and are also increasingly used in high-tech industries. However, long-term use of silver alloy materials is prone to vulcanization, discoloration and oxidative erythema, which affects the appearance and use. And the research work on the anti-tarnish silver alloy aspect has been carried out in the whole world, improves the anti-tarnish performance of silv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/06C22C1/03
Inventor 谭霖谢兆凤刘万里覃小龙柴承平粟明辉
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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