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A kind of hard pure gold and its preparation method

A technology of hard and yttrium powder, which is applied in the field of hard pure gold and its preparation, which can solve the problems of difficult processing, low hardness and damage of thousand pure gold, and achieve good plasticity, increased hardness and non-deformable effects

Active Publication Date: 2019-02-15
JUNSON SHENZHEN CHUANJINDAIYIN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the existing thousand pure gold has low hardness, is easy to wear, deform, damage, and is not easy to process, thereby proposing a kind of hard pure gold and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment provides a kind of hard pure gold, in parts by weight, the hard pure gold is composed of the following components, 950 parts of pure gold with a gold content of 999.3 parts per thousand, 6.65 parts of yttrium powder, 0.475 parts of boron powder, neodymium 0.76 parts of powder, 0.19 parts of carbon powder, 0.19 parts of zirconium powder. Among them, the particle size of yttrium powder, boron powder, neodymium powder, carbon powder and zirconium powder is 5 μm.

[0024] The preparation method of described hard pure gold, comprises the steps:

[0025] 1) the above-mentioned yttrium powder, boron powder, neodymium powder, carbon powder and zirconium powder of above-mentioned weight portion are placed in the gold melting furnace together with the gold nugget;

[0026] 2) evacuating the gold melting furnace to a vacuum degree of 0.05MPa, feeding argon gas, and reducing the vacuum degree in the gold melting furnace to 0.04MPa;

[0027] 3) the gold melting fur...

Embodiment 2

[0030] This embodiment provides a kind of hard pure gold, in parts by weight, the hard pure gold is composed of the following components, 1000 parts of pure gold with a gold content of 999.3 parts per thousand, 7 parts of yttrium powder, 0.5 part of boron powder, neodymium 0.8 part of powder, 0.21 part of carbon powder, 0.21 part of zirconium powder. Among them, the particle size of yttrium powder, boron powder, neodymium powder, carbon powder and zirconium powder is 7 μm.

[0031] The preparation method of described hard pure gold, comprises the steps:

[0032] 1) the above-mentioned yttrium powder, boron powder, neodymium powder, carbon powder and zirconium powder of above-mentioned weight portion are placed in the gold melting furnace together with the gold nugget;

[0033] 2) evacuating the gold melting furnace to a vacuum degree of 0.05MPa, feeding argon gas, and reducing the vacuum degree in the gold melting furnace to 0.04MPa;

[0034] 3) heating the gold melting furn...

Embodiment 3

[0037] This embodiment provides a kind of hard pure gold, in parts by weight, the hard pure gold is composed of the following components: 1050 parts of pure gold with a gold content of 999.3 parts per thousand, 7.35 parts of yttrium powder, 0.525 parts of boron powder, neodymium 0.84 part of powder, 0.21 part of carbon powder, 0.22 part of zirconium powder. Among them, the particle size of yttrium powder, boron powder, neodymium powder, carbon powder and zirconium powder is 10 μm.

[0038] The preparation method of described hard gold, comprises the steps:

[0039] 1) the above-mentioned yttrium powder, boron powder, neodymium powder, carbon powder and zirconium powder of above-mentioned weight portion are placed in the gold melting furnace together with the gold nugget;

[0040] 2) evacuating the gold melting furnace to a vacuum degree of 0.05MPa, feeding argon gas, and reducing the vacuum degree in the gold melting furnace to 0.04MPa;

[0041] 3) the gold melting furnace i...

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Abstract

The invention discloses hard 99.9% fine gold. The hard 99.9% fine gold is prepared from the following components: 950-1050 parts of 99.9% fine gold, 6.65-7.35 parts of yttrium powder, 0.475-0.525 parts of boron powder, 0.76-0.84 parts of neodymium powder, 0.19-0.21 parts of carbon powder and 0.19-0.22 parts of zirconium powder. Compared with the prior art, the hardness of the hard 99.9% fine gold is improved greatly, the hard 99.9% fine gold is easier to process, and a product prepared from the hard 99.9% fine gold is not easy to deform or wear and has good plasticity. The invention further discloses a preparation method of the hard 99.9% fine gold. The preparation method comprises the following steps: 1) the yttrium powder, the boron powder, the neodymium powder, the carbon powder and the zirconium powder are mixed with a 99.9% fine gold block; 2) the mixture obtained in the step 1) is enabled to be in a vacuum state, and argon is introduced; 3) the mixture is heated to the melting point of the 99.9% fine gold or higher, heat is preserved, and the 99.9% fine gold is melted; 4) cooling and heat preservation are performed, then the 99.9% fine gold mixed with the yttrium powder, the boron powder, the neodymium powder, the carbon powder and the zirconium powder is cooled to be formed, and the hard 99.9% fine gold is obtained. The preparation process and equipment for the hard 99.9% fine gold are simple, the hardness of the prepared hard 99.9% fine gold is improved greatly, and the color and the corrosion resistance are almost unchanged.

Description

technical field [0001] The invention belongs to the technical field of gold manufacturing, in particular to a hard pure gold and a preparation method thereof. Background technique [0002] As a precious metal, gold is not only a special currency for reserve and investment, but also an important material for jewelry, electronics, modern communications, aerospace and other sectors. Thousand pure gold is gold with a gold content of not less than 999 per thousand. It is favored by people because of its high purity, but it also has the disadvantage of soft texture (Vickers hardness of HV62) and difficult to process. At the same time, because of its low hardness, it is easy to be carved by foreign objects. It is not easy to maintain the delicate pattern and cause jewelry, etc. to be damaged, and it is also easy to deform or be pulled off. [0003] Therefore, in order to meet people's demand for pure gold jewelry, so that it can meet various processing conditions, it is not easy t...

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 胡少华
Owner JUNSON SHENZHEN CHUANJINDAIYIN TECH CO LTD
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