Gold alloy with 18k span effect and preparation method thereof

An alloy and effect technology, applied in metal processing equipment, manufacturing tools, grinding/polishing equipment, etc., can solve the problems of time-consuming, energy-consuming, cumbersome heat treatment process, etc.

Inactive Publication Date: 2009-10-28
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat treatment process of obtaining the order of the parent phase through aging and then quenching to obtain the Spann effect is relatively cumbersome. After the surface is polished and polished, it still needs to be aged for a long time, which is time-consuming and energy-consuming.

Method used

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  • Gold alloy with 18k span effect and preparation method thereof
  • Gold alloy with 18k span effect and preparation method thereof
  • Gold alloy with 18k span effect and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Preparation of a gold alloy containing 18k gold and having the Spawn effect, its composition and mass percentage are: Au 75.00%, Cu 19.01% and Al 5.99%.

[0023] The gold alloy with 18K Spank effect described in this embodiment is prepared through the following steps:

[0024] The first step is to select 99.9% pure gold, 99.9% pure copper, and 99.9% pure aluminum, and carry out batching according to the weight percentage of Au:Cu:Al=75:19.01:5.99; then under the protection of inert gas, the batching is vacuum smelted , to obtain a gold alloy casting slab, and finally perform annealing treatment in a vacuum environment, the annealing temperature is 600 ° C, and the time is 5 hours;

[0025] The second step is to melt the gold alloy casting slab and cast it into the designed model to obtain alloy castings; then perform mechanical polishing on the alloy castings in turn to obtain a smooth surface; then heat to 680°C under vacuum protection, Keeping the tempe...

Embodiment 2

[0028] Embodiment 2: Preparation of a gold alloy containing 18k gold and having the Spawn effect, its composition and mass percentage are: Au 81.21%, Cu 14.47%, Al 4.32%.

[0029] The gold alloy with 18K Spank effect described in this embodiment is specifically prepared through the following steps:

[0030] The first step is to select 99.9% pure gold, 99.9% pure copper, 99.9% pure aluminum, Au: Cu: Al = 81.21: 14.47: 4.32 weight percentage for batching; then under the protection of inert gas, the batching is vacuum smelted, The gold alloy casting slab was obtained, and finally annealed in a vacuum environment at a temperature of 600° C. for 4 hours.

[0031] The second step is to melt the gold alloy casting billet and cast it into the designed model to obtain alloy castings, then heat the alloy castings to 680°C under vacuum protection in turn, and heat the alloy castings with normal temperature pure water after 30 minutes After quenching and finally chemical polishing, the a...

Embodiment 3

[0034] Example 3: Preparation of a gold alloy containing 18k gold and having the Spawn effect, its composition and mass percentage are: Au 82.00%, Cu 13.10% and Al 4.90%.

[0035] The gold alloy with 18K Spank effect described in this embodiment is prepared through the following steps:

[0036] The first step is to select 99.9% pure gold, 99.9% pure copper, and 99.9% pure aluminum, and carry out batching according to the weight percentage of Au:Cu:Al=82:13.10:4.90; then under the protection of inert gas, the batching is vacuum smelted , to obtain a gold alloy casting slab, and finally perform annealing treatment in a vacuum environment, the annealing temperature is 600 ° C, and the time is 5 hours;

[0037] The second step is to melt the gold alloy casting slab and cast it into the designed model to obtain alloy castings; then perform mechanical polishing on the alloy castings in turn to obtain a smooth surface; then heat to 680°C under vacuum protection, Keeping the temperatur...

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Abstract

The invention discloses a gold alloy with 18k span effect and a preparation method thereof in the technical field of noble metal alloy thermal treatment. The gold alloy comprises the following components according to weight percentage: 75.00 to 82 percent of Au, 13.1 to 19.01 percent of Cu and 4.0 to 6.0 percent of Al. The gold alloy with 18k span effect and the preparation method thereof can obtain martensitic phase transformation without ageing; the obtained 18k span has good stability at room temperature and the temperature of the reversible martensitic phase transformation is above 60 DEG C.

Description

technical field [0001] The invention relates to an alloy in the technical field of precious metals and heat treatment and a preparation method thereof, in particular to an 18K Spanner effect gold alloy used in jewelry processing and manufacturing and a preparation method thereof. Background technique [0002] The surface treatment of traditional jewelry materials is often through surface grinding and polishing to obtain a mirror-like smooth surface. Spot gold is a new type of decorative K gold material. The Spank effect has long been proposed, and its essence is the surface relief produced by the martensitic transformation. Many alloys undergo martensitic transformation after surface polishing in the austenitic state, and fine embossed stripes appear on the surface, and colorful effects appear on the surface under light irradiation, which is usually called "Spot effect". The study found that this kind of Spank effect can be produced in CuZnAl, CuSn, PtTi, PtAlCu, AuCu, AuC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/02C22C1/02C22F1/14C21D1/26C21D1/18B24B29/02C23F3/06
Inventor 金学军张心一王若川朱冬亮陈捷张伟民金明江顾一嘉
Owner SHANGHAI JIAO TONG UNIV
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