Silver alloy for high-temperature enamel inlaid jewelry

A technology of silver alloy and silver-copper alloy is applied in the field of silver alloy base material for preparing high-temperature enamel, which can solve the problems of orange peel on the surface, air bubbles on the enamel surface, oxidized slag, etc., and achieves good gloss, good high-temperature firing and transparency. high effect

Active Publication Date: 2015-11-18
GUANGZHOU PANYU POLYTECHNIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The base material of enamel silver jewelry also uses sterling silver and anti-tarnish silver alloy accordingly, but when firing enamel, problems such as air bubbles, oxidation residue, haze, discoloration, and peeling of the enamel surface often occur, such as Figure 1~3 As shown, it has brought great trouble to the production
Moreover, after repeated firings, orange peel or cracks often appear on the surface, resulting in the scrapping of the workpiece

Method used

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  • Silver alloy for high-temperature enamel inlaid jewelry
  • Silver alloy for high-temperature enamel inlaid jewelry
  • Silver alloy for high-temperature enamel inlaid jewelry

Examples

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preparation example Construction

[0035] A method for preparing a silver alloy, the method comprising the following steps:

[0036] 1) Weigh the corresponding amount of metal raw materials, the amount of each metal raw material so that the composition of the prepared silver alloy is as the criterion as mentioned above;

[0037] 2) Mix the raw materials weighed above and then smelt them. After the melting is completed, wait for the temperature of each component to be uniform and cast them into ingots.

[0038] Preferably, before the smelting described in step 2), vacuumize to 4.5-5.5 Pa, and then fill in inert gas to a pressure of 0.97-1.03 atm.

[0039] Preferably, the above-mentioned inert gas is argon.

[0040] Preferably, the temperature during smelting in step 2) is 990-1010°C.

[0041] Preferably, in step 2), the temperature of each component to be uniform in temperature is 980-1000°C.

[0042] Preferably, the metal raw material in step 1) is silver-scandium alloy, silver-palladium alloy, silver-copper...

Embodiment 1

[0048] The present embodiment is used for the silver alloy of enamel inlaid jewelry, and its composition comprises the following components by mass percentage: 94.39wt% silver, 2.43wt% copper, 2.35wt% zinc, 0.70wt% palladium, 0.074wt% silicon, 0.008wt% scandium, and the balance is unavoidable impurities.

[0049] The preparation method of silver alloy described in the present embodiment comprises the following steps:

[0050] 1) Weigh the following raw materials in mass percentage: 1.6wt% silver-scandium alloy (containing 0.5wt% scandium), 7wt% silver-palladium alloy (containing 10wt% palladium), 5wt% silver-copper alloy (containing 20wt% copper), 12wt% Silver-zinc alloy (20wt% zinc), 1.5wt% copper-silicon alloy (5wt% silicon), 72.9wt% pure silver;

[0051] 2) Melting in a vacuum induction furnace: Put the above-mentioned weighed raw materials into a graphite crucible, mix well, fill it tightly and close the furnace cover, evacuate to 5.2Pa, then fill with industrial pure arg...

Embodiment 2

[0069] This embodiment is used for the silver alloy of enamel inlaid jewelry, and its composition comprises the following components by mass percentage: 94.20wt% silver, 2.40wt% copper, 2.98wt% zinc, 0.30wt% palladium, 0.053wt% silicon, 0.007wt% scandium, and the balance is unavoidable impurities.

[0070] The preparation method of silver alloy described in the present embodiment comprises the following steps:

[0071] 1) Weigh the following raw materials in mass percentage: 1.5wt% silver-scandium alloy (containing 0.5wt% scandium), 3.1wt% silver-palladium alloy (containing 10wt% palladium), 12.5wt% silver-zinc alloy (containing 20wt% zinc), 1.1wt% copper-silicon alloy (containing 5wt% silicon), 2wt% copper-zinc alloy (containing 30wt% zinc), 81.8wt% pure silver;

[0072] 2) Melting in a vacuum induction furnace: Put the above-mentioned weighed raw materials into a graphite crucible, mix well, fill it tightly and close the furnace cover, vacuumize to 4.9Pa, and then fill with...

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Abstract

The invention discloses a silver alloy for a high-temperature enamel inlaid jewelry. The silver alloy comprises 93-95 wt% of silver and a trace amount of copper, zinc, palladium, silicone and scandium. A preparation method of the silver alloy comprises the following steps: weighing corresponding amounts of metal raw materials; smelting at 990-1,010 DEG C after mixing; and after smelting, casting into ingots till the temperatures of all the ingredients are equal to obtain the silver alloy. The silver alloy is very suitable for serving as the base of transparent enamel, and excellent in tarnish resistance and high-temperature oxidation resistance, enamel fired by the silver alloy is high in transparency and good in glossiness, can be firmly combined with the base, and the silver alloy is free of surface cracks and wrinkles after being repeatedly fired at high temperature, is relatively high in strength and hardness and can meet the requirement for jewelry setting.

Description

technical field [0001] The invention relates to a silver alloy material, in particular to a silver alloy base material suitable for preparing high-temperature enamel. Background technique [0002] Silver has an attractive white luster and a reflectivity of 94% to visible light. It has excellent collection and ornamental value and anti-virus and sterilization properties, and is widely used in jewelry and handicrafts. Using pure silver as the base to fire enamel can obtain better color and transparency, especially the firing effect of blue glaze is very good, commonly known as fired silver blue, which is an important method for surface decoration of traditional silver ornaments. However, due to the soft texture and low strength of sterling silver, it is difficult to meet the needs of inlaying. The gemstones can only be glued together, which leads to problems such as low artistic value, poor manufacturing process, easy deformation and loss of luster when worn and used. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/08C22C5/06C22C1/03
Inventor 袁军平王昶李卫
Owner GUANGZHOU PANYU POLYTECHNIC
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