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Gold alloy for 22 K gold and with aging stability and corrosion resistance

A stable and corrosion-resistant technology, applied in the field of gold alloys, can solve the problems of second-phase precipitate corrosion and mechanical strength difficulties, and achieve the effects of increasing the liquid phase temperature range, preventing segregation, and increasing the degree of supercooling

Inactive Publication Date: 2018-10-16
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, long-term research has found that it is extremely difficult to maintain a single-phase fcc state and maintain extremely high mechanical strength.
It is not difficult to strengthen by adding alloying elements to form a second phase, but the second phase precipitates instead become a source of corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] An age-stable and corrosion-resistant gold alloy for 22K gold. In terms of weight percentage, the composition of the alloy is Sr: 0.4wt.%, Mg: 2.0wt.%, Mo: 0.2wt.%, Sc: 0.4wt.%, Ta: 0.6wt.%, Au: 90.0wt.% , and the balance is copper. The above-mentioned preparation method of a 22K gold alloy with aging stability and corrosion resistance comprises the following steps: adding the above proportioned raw materials into an argon-protected induction furnace, and using a graphite crucible; The flow of argon is protected to avoid severe burning of the alloy elements due to the large air flow; when smelting, it is kept at 1050 degrees for 10 minutes, and it is evenly stirred by a high-frequency induction furnace; after stirring evenly, it is kept at 1250 degrees for 1 minute and cast out of the furnace; gold alloy Casting adopts a steel mold with a diameter of 100-200mm, and uses water cooling to cool down. The obtained ingot is rolled at room temperature, and the amount of rol...

Embodiment 2

[0019] An age-stable and corrosion-resistant gold alloy for 22K gold. In terms of weight percentage, the composition of the alloy is Sr:0.5wt.%, Mg:2.5wt.%, Mo:0.4wt.%, Sc:0.6wt.%, Ta:0.8wt.%, Au:92.0wt.% , and the balance is copper. The above-mentioned preparation method of a 22K gold alloy with aging stability and corrosion resistance comprises the following steps: adding the above proportioned raw materials into an argon-protected induction furnace, and using a graphite crucible; The flow of argon is protected to avoid severe burning of the alloy elements due to the large air flow; when smelting, it is kept at 1050 degrees for 10 minutes, and it is evenly stirred by a high-frequency induction furnace; after stirring evenly, it is kept at 1250 degrees for 1 minute and cast out of the furnace; gold alloy Casting adopts a steel mold with a diameter of 100-200mm, and uses water cooling to cool down. The obtained ingot is rolled at room temperature, and the amount of rolling i...

Embodiment 3

[0022] An age-stable and corrosion-resistant gold alloy for 22K gold. In terms of weight percentage, the composition of the alloy is Sr:0.4wt.%, Mg:2.4wt.%, Mo:0.3wt.%, Sc:0.5wt.%, Ta:0.7wt.%, Au:91.0wt.% , and the balance is copper. The above-mentioned preparation method of a 22K gold alloy with aging stability and corrosion resistance comprises the following steps: adding the above proportioned raw materials into an argon-protected induction furnace, and using a graphite crucible; The flow of argon is protected to avoid severe burning of the alloy elements due to the large air flow; when smelting, it is kept at 1050 degrees for 10 minutes, and it is evenly stirred by a high-frequency induction furnace; after stirring evenly, it is kept at 1250 degrees for 1 minute and cast out of the furnace; gold alloy Casting adopts a steel mold with a diameter of 100-200mm, and uses water cooling to cool down. The obtained ingot is rolled at room temperature, and the amount of rolling i...

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PUM

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Abstract

The invention discloses a gold alloy for 22 K gold and with aging stability and corrosion resistance. The alloy comprises, by weight, 0.4-0.5% of Sr, 2.0-2.5% of Mg, 0.2-0.4% of Mo, 0.4-0.6% of Sc, 0.6-0.8% of Ta, 90.0-92.0% of Au, and the balance copper. By means of the gold alloy, the situation that the mechanical properties of 22 K gold is unsatisfied is solved, the development bottleneck of the 22 K gold for jewelry is broken through due to gold component innovation and optimization, and it can be predicted that implementation and industrialization of the alloy can achieve great economic gains and social benefits.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a gold alloy. Background technique [0002] Gold is a precious metal and one of the earliest metals discovered and developed by human beings. It is an important raw material for making jewelry and coins, and it is also an important reserve material of the country. It is known as the king of metals. It is not only regarded as a symbol of beauty and wealth, but also benefits human life with its unique value. An important application field of gold is decorative materials, including jewelry and so on. Soft gold deforms easily and wears out easily. Therefore, people began to try to add a small amount of other alloying elements to pure gold to increase the hardness of gold. Among them, silver, copper, zinc, etc. are all metals that are commonly added to gold to increase its strength and toughness. Gold with alloying elements added, that is, gold alloy. [0003] Gold alloy, also kno...

Claims

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Application Information

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IPC IPC(8): C22C5/02C22C1/02C22F1/14
CPCC22C5/02C22C1/02C22F1/14
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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