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Silver-free and brittle fracture-resistant 18K rose gold and processing technology thereof

An 18K, rose gold technology, applied in the field of gold alloys, can solve the problems of accelerating the solidification rate of castings and brittle fracture of K rose gold, and achieve the effect of overcoming structural stress and brittleness, improving mechanical properties, processing efficiency and reducing scrap rate.

Inactive Publication Date: 2018-08-21
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, the brittle fracture problem of K rose gold can only be solved by indirect methods, such as accelerating the solidification speed of castings, adopting the process of deformation after homogenization, etc.
However, these methods cannot fundamentally provide a complete solution for the low-temperature brittle fracture of K rose gold, and brittle fracture of K rose gold will still occur after long-term use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A silver-free 18K rose gold with brittle fracture resistance and its processing technology. In terms of weight percentage, the composition of the alloy is Ba: 0.2wt.%, V: 0.6wt.%, Ni: 1.2wt.%, Sb: 1.0wt.%, In: 8.0wt.%, Au: 74.0wt.% , The balance is copper. The above-mentioned preparation method of 18K rose gold without silver and brittle fracture includes the following steps: adding the above-mentioned raw materials into an argon-protected induction electric furnace, and using a graphite crucible; after the metal is melted, using low-flow argon protection, Avoid large air currents to cause serious burning of alloy elements; heat preservation at 1150 degrees for 10 minutes during smelting, and stir evenly by high-frequency induction furnace electromagnetic stirring; after stirring evenly, heat preservation at 1250 degrees for 1 minute and cast out of the furnace; gold alloy casting adopts a diameter of 100-200mm The steel mold is cooled by water cooling. The obtained in...

Embodiment 2

[0020] A silver-free 18K rose gold with brittle fracture resistance and its processing technology. In terms of weight percentage, the composition of the alloy is Ba: 0.4wt.%, V: 0.8wt.%, Ni: 1.6wt.%, Sb: 1.2wt.%, In: 12.0wt.%, Au: 76.0wt.% , The balance is copper. The above-mentioned preparation method of 18K rose gold without silver and brittle fracture includes the following steps: adding the above-mentioned raw materials into an argon-protected induction electric furnace, and using a graphite crucible; after the metal is melted, using low-flow argon protection, Avoid large air currents to cause serious burning of alloy elements; heat preservation at 1150 degrees for 10 minutes during smelting, and stir evenly by high-frequency induction furnace electromagnetic stirring; after stirring evenly, heat preservation at 1250 degrees for 1 minute and cast out of the furnace; gold alloy casting adopts a diameter of 100-200mm The steel mold is cooled by water cooling. The obtained i...

Embodiment 3

[0023] A silver-free 18K rose gold with brittle fracture resistance and its processing technology. In terms of weight percentage, the composition of the alloy is Ba: 0.3wt.%, V: 0.7wt.%, Ni: 1.5wt.%, Sb: 1.1wt.%, In: 9.0wt.%, Au: 75.0wt.% , The balance is copper. The above-mentioned preparation method of 18K rose gold without silver and brittle fracture includes the following steps: adding the above-mentioned raw materials into an argon-protected induction electric furnace, and using a graphite crucible; after the metal is melted, using low-flow argon protection, Avoid large air currents to cause serious burning of alloy elements; heat preservation at 1150 degrees for 10 minutes during smelting, and stir evenly by high-frequency induction furnace electromagnetic stirring; after stirring evenly, heat preservation at 1250 degrees for 1 minute and cast out of the furnace; gold alloy casting adopts a diameter of 100-200mm The steel mold is cooled by water cooling. The obtained in...

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Abstract

The invention discloses silver-free and brittle fracture-resistant 18K rose gold and a processing technology thereof. The silver-free and brittle fracture-resistant 18K rose gold comprises the following components in percent by weight: 0.2-0.4wt.% of Ba, 0.6-0.8wt.% of V, 1.2-1.6wt.% of Ni, 1.0-1.2wt.% of Sb, 8.0-12.0wt.% of In, 74.0-76.0wt.% of Au and the balance of copper. The invention providesnovel silver-free 18K rose gold and the processing technology thereof, and the characteristic of low-temperature brittle fracture of the conventional rose gold is avoided. Through the innovation andoptimization of the alloy components, the development bottleneck of a 18K red gold material for jewelries is broken through; implementation and industrialization of the material achieve plenteous economic results 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 the rarest golden and corrosion-resistant precious metal among metals. Pure gold is the best electronic conductor material. It has good ductility, can be pressed into a thin foil, and has extremely high heat transfer and conductivity. When other alloying elements are added to gold, gold alloys are formed. For gold alloys, except for white gold, everything else is called color gold. The reason for the color is because the metal ratio is different. Many gold alloys have these functions, such as gold-nickel alloys, gold-indium alloys, gold-copper alloys, and gold-silver alloys. The color of most gold alloys is golden yellow series, such as golden, light golden and rose gold. The other color is reddish, such as pink, pink, and rose. Gold and silver alloys can also get green, and gold-nickel alloys and gold-silver alloys can get this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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