High-strength pure gold material and preparation method thereof

A high-strength, gold material technology, applied in the field of high-strength pure gold material and its preparation, can solve the problem that it is difficult to achieve large-scale and batch high-content gold material and its accessories and jewelry products. Alloy elements and gold are difficult to fuse and other problems, to achieve the effect of light weight, low loss and low cost

Active Publication Date: 2019-02-01
深圳市金弘珠宝首饰有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the existing formulations, the added alloying elements have high melting points, rare elements, and poor solid solubility with gold, and rare earths are generally used, so they must use high-temperature, high-vacuum smelting equipment to make pre-alloys, resulting in product production cycles. Long, high cost; at the same time, it is difficult to fuse the alloy elements and gold used, which makes it difficult to guarantee the composition uniformity and stability of the jewelry products produced by it.
Therefore, the existing solutions are difficult to achieve large-scale and batch production of high-content gold materials and their accessories

Method used

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  • High-strength pure gold material and preparation method thereof
  • High-strength pure gold material and preparation method thereof
  • High-strength pure gold material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] First, mix 0.4% indium, 0.3% gallium, 0.2% tin, 0.05% germanium and 0.05% cobalt, then add 99% high-purity gold (gold content 99.99%), and use vacuum induction melting method for melting, Put alloy elements and pure gold into the crucible for melting at one time. In order to ensure the uniformity of the sample, electromagnetic stirring is used in the smelting, and the sample is smelted twice, and then solidified to obtain the target pure gold material. The pure gold material was cast and cold-rolled into gold flakes with a thickness of 0.5mm. The gold content of the sample was tested by the fire assay method, and the hardness of the sample was measured by a microhardness tester. The obtained data are shown in Table 1:

[0042] Table 1 Example 1 pure gold material hardness test result

[0043] sample status

Embodiment 2

[0049] First, mix 0.3% indium, 0.2% gallium, 0.3% tin, 0.1% germanium and 0.1% nickel, then add 99% high-purity gold (99.99% gold content), and use an open induction furnace for melting , when smelting, add borax covering agent on the surface, wrap the alloy elements with pure gold sheets, and put them into the crucible for smelting together with gold. In order to ensure the uniformity of the sample, the sample was smelted twice, and a quartz rod was used for stirring during the smelting, and then solidified to obtain the target pure gold material. The pure gold material was cast and cold-rolled into gold flakes with a thickness of 0.5 mm. The gold content of the sample was tested by the fire assay method, and the hardness of the sample was measured by a microhardness tester. The obtained data are shown in Table 3:

[0050] Table 3 embodiment 2 solid gold material hardness test result

[0051] sample status

Embodiment 3

[0053] First, mix 0.2% indium, 0.4% gallium, 0.3% tin, 0.05% cobalt and 0.05% nickel, then add 99% high-purity gold (99.99% gold content), and use an open induction furnace for melting , when smelting, add borax covering agent on the surface, wrap the alloy elements with pure gold sheets, and put them into the crucible for smelting together with gold. In order to ensure the uniformity of the sample, the sample was smelted twice, and a quartz rod was used for stirring during the smelting, and then solidified to obtain the target pure gold material. The pure gold material was cast and cold-rolled into gold flakes with a thickness of 0.5mm. The gold content of the sample was tested by the fire assay method, and the hardness of the sample was measured by a microhardness tester. The obtained data are shown in Table 4:

[0054] Table 4 Example 3 pure gold material hardness test result

[0055] sample status

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Abstract

The invention provides a high-strength pure gold material. The high-strength pure gold material comprises 0.01 wt%-0.6 wt% of In, 0.01 wt%-0.6 wt% of Ga, 0.01 wt%-0.6 wt% of Sn, 0-0.6 wt% of Ge, 0-0.6 wt% of Co, 0-0.6 wt% of Ni and the balance Au, and the total content of the In, the Ga, the Sn, the Ge, the Co and the Ni does not exceed 1 wt%. The adding amount of alloy elements adopted in the high-strength pure gold material is small, very good solid solubility is achieved, the high-strength pure gold material and gold can be directly smelted, and pre-alloys do not need to be prepared; and the cost of the alloy elements is low, the smelting losses are small, and the production cost is saved. The melting point of the alloy elements added in the high-strength pure gold material is universally lower than the melting point of gold, oxidization is not likely to happen, no special requirements for the temperature and the vacuum degree of smelting equipment exist, special smelting and casting equipment does not need to be customized, pure gold material forming and machining are easy, and the production input is low.

Description

technical field [0001] The invention relates to the technical field of gold materials, in particular to a high-strength pure gold material and a preparation method thereof. Background technique [0002] Chinese people have loved gold very much since ancient times. Gold jewelry is also the precious metal jewelry with the largest production scale and sales volume in China. However, gold itself has a very low hardness. Wear and tear, so the characteristics of traditional gold are thick and heavy, which greatly limits the design and development of gold products. In contrast, the K gold jewelry that is popular in the market now has greatly improved its material strength by adding 25% or more alloying elements, and can design and produce very light, thin, and fine products, but Because a large amount of alloy elements such as copper, silver, and zinc are added to K gold materials, it is easy to change color after wearing for a long time; in addition, due to the complicated produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/02C22C1/02
CPCC22C1/02C22C5/02
Inventor 肖萍周鹏
Owner 深圳市金弘珠宝首饰有限公司
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