Shallow gold alloy target material and preparation method and application thereof

Abstract

The invention relates to the technical field of non-ferrous metals, and provides a shallow gold alloy target as well as a preparation method and application thereof. The shallow gold alloy target material provided by the invention comprises the following components in percentage by mass: 85 to 90 weight percent of Au, 6.8 to 9.0 weight percent of Ag, 2.07 to 3.92 weight percent of Zn, 1.0 to 1.5 weight percent of Fe, 0.1 to 0.5 weight percent of In, 0.01 to 0.03 weight percent of Sb, 0.01 to 0.03 weight percent of Si and 0.01 to 0.02 weight percent of Nd. According to the invention, the shallow gold alloy target material is developed by changing alloy elements and contents, and is suitable for the design of various ornaments and the coating of the ornament processing industry; when the light gold alloy target material is used for vacuum magnetron sputtering coating, a film layer with good oxidation resistance and corrosion resistance can be obtained, the color meets the current market demand, and the light gold alloy target material has wide market application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of nonferrous metals, and in particular to a light gold alloy target material and a preparation method and application thereof. Background Art

[0002] Gold and its related alloys have always been important decorative materials and sources of ornaments, among which color and performance are one of the most important properties of gold and its alloys. In recent years, the market has increasingly higher requirements for the durability and color diversity of gold and its alloys, and more new gold-based alloy materials need to be developed to meet market demand.

[0003] Light-colored gold alloy material is an alloy that is lighter in color than pure gold. It is currently widely welcomed in some decorative and jewelry material fields. Its hardness, wear resistance and other properties are better than pure gold, and it can reduce the use of gold, save energy and reduce costs.

[0004] Based on the fact that the preparation method of gold-based materials for surface decoration has gradually transitioned from the traditional water-plating and electroplating gold alloy product process to the advanced vacuum magnetron sputtering coating technology, the development of a series of light-colored gold alloy targets can not only meet the needs of the market, but also enrich the gold-based alloy series products. However, there are currently fewer types of light-colored gold alloy targets, and the oxidation resistance and corrosion resistance of the film obtained after coating need to be further improved. Summary of the invention

[0005] In view of this, the present invention provides a light gold alloy target material and a preparation method and application thereof. The present invention develops a new light gold alloy target material by changing the alloy elements and their contents, and uses the target material for vacuum magnetron sputtering coating. The obtained film layer has excellent oxidation resistance and corrosion resistance, meeting market demand.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] A light gold alloy target comprises the following components in percentage by weight: Au 85-90wt.%, Ag 6.8-9.0wt.%, Zn 2.07-3.92wt.%, Fe 1.0-1.5wt.%, In 0.1-0.5wt.%, Sb 0.01-0.03wt.%, Si 0.01-0.03wt.%, Nd 0.01-0.02wt.%.

[0008] The present invention also provides a method for preparing the shallow gold alloy target material described in the above scheme, comprising the following steps:

[0009] Au, Ag, Fe, In, Sb, Si, Nd and Zn are smelted, refined and poured to obtain a light gold alloy ingot;

[0010] The light gold alloy ingot is subjected to homogenization heat treatment, rolling and surface treatment in sequence to obtain the light gold alloy target.

[0011] Preferably, the smelting temperature is not higher than 1250° C., and the smelting equipment used is a high-frequency vacuum induction melting furnace, a high-frequency furnace or a resistance furnace.

[0012] Preferably, the refining temperature is 1150-1250° C., and the time is 10-15 min. After the refining is completed, the process further comprises standing for 5-10 min.

[0013] Preferably, the temperature of the homogenization heat treatment is 600-650° C., and the heating rate to the temperature of the homogenization heat treatment is 8-10° C. / min; the time of the homogenization heat treatment is 30-40 min.

[0014] Preferably, the rolling is cold rolling.

[0015] Preferably, the cold rolling has a single pass reduction of 15-20%, and a total reduction of 70-85%.

[0016] Preferably, the surface treatment method includes grinding and / or polishing.

[0017] The present invention also provides the use of the light gold alloy target material described in the above scheme or the light gold alloy target material prepared by the preparation method described in the above scheme in vacuum magnetron sputtering coating.

[0018] Preferably, the chromaticity values ​​of the film layer obtained by vacuum magnetron sputtering coating are: L value is 90.2 to 92.4, a value is 1.0 to -2.2, and b value is 18.6 to 28.5 。

[0019] The invention provides a light gold alloy target material, comprising the following components in percentage by weight: Au 85-90wt.%, Ag 6.8-9.0wt.%, Zn 2.07-3.92wt.%, Fe 1.0-1.5wt.%, In 0.1-0.5wt.%, Sb 0.01-0.03wt.%, Si 0.01-0.03wt.%, Nd 0.01-0.02wt.%. The invention adopts Ag, Zn, Fe, In, Sb, Si and Nd as alloy elements, and develops a novel light gold alloy target material by changing the alloy elements and the content thereof. The chromaticity value a value is relatively low at about 0, and the b value is above 15, and the light gold alloy target material is suitable for coating in various decoration design and decoration processing industries. The light gold alloy target material of the invention is used for vacuum magnetron sputtering coating, and a film layer with good anti-oxidation and corrosion resistance can be obtained, and the color meets the current market demand, and has a broad market application prospect. The results of the embodiment show that after the light gold alloy target material of the present invention is used for coating, the film layer does not change color in an artificial sweat test for 244 to 360 hours, and does not change color in a salt spray test for 192 to 264 hours. DETAILED DESCRIPTION

[0020] The invention provides a shallow gold alloy target, comprising the following components in percentage by weight: Au 85-90wt.%, Ag 6.8-9.0wt.%, Zn 2.07-3.92wt.%, Fe 1.0-1.5wt.%, In 0.1-0.5wt.%, Sb 0.01-0.03wt.%, Si 0.01-0.03wt.%, Nd 0.01-0.02wt.%.

[0021] In terms of mass percentage, the light gold alloy target provided by the present invention includes Au 85-90wt.%, specifically 85wt.%, 85.6wt.%, 86.3wt.%, 86.8wt.%, 87.5wt.%, 88wt.%, 88.6wt.%, 89.2wt.%, 89.6wt.% or 90wt.%.

[0022] In terms of mass percentage, the light gold alloy target provided by the present invention includes 6.8-9.0wt.% of Ag, specifically 6.8wt.%, 7wt.%, 7.6wt.%, 7.8wt.%, 8wt.%, 8.4wt.%, 8.5wt.%, 8.8wt.% or 9wt.%. In the present invention, the addition of Ag element can effectively reduce the redness of gold, achieve the effect of light gold, maintain its yellowness to a certain extent, improve the corrosion resistance of the alloy, promote the fluidity of the alloy, and also improve the brightness of the alloy.

[0023] In terms of mass percentage, the light gold alloy target provided by the present invention includes 2.07-3.92wt.% of Zn, specifically 2.07wt.%, 2.17wt.%, 2.22wt.%, 2.57wt.%, 2.71wt.%, 2.95wt.%, 3.34wt.%, 3.58wt.% or 3.92wt.%. In the present invention, the Zn element in gold can reduce its redness, improve the alloy's anti-artificial sweat performance, salt spray resistance and high temperature resistance, and can improve the brightness of the alloy, but due to its greater influence on yellowness, it should be added in an appropriate amount.

[0024] In terms of mass percentage, the shallow gold alloy target provided by the present invention includes Fe 1.0-1.5wt.%, specifically 1wt.%, 1.1wt.%, 1.2wt.%, 1.25wt.%, 1.3wt.%, 1.35wt.%, 1.4wt.%, 1.45wt.% or 1.5wt.%.

[0025] In terms of mass percentage, the light gold alloy target provided by the present invention includes 0.1-0.5wt.% In, specifically 0.1wt.%, 0.2wt.%, 0.3wt.%, 0.4wt.% or 0.5wt.%. In the present invention, the addition of Fe and In elements can further promote the light gold effect and improve the corrosion resistance of the alloy.

[0026] In terms of mass percentage, the light gold alloy target provided by the present invention includes 0.01-0.03 wt.% of Sb, specifically 0.01 wt.%, 0.02 wt.% or 0.03 wt.%.

[0027] Calculated in mass percentage, the shallow gold alloy target provided by the present invention includes 0.01-0.03wt.% of Si, specifically 0.03wt.%, 0.02wt.% or 0.01wt.%.

[0028] In terms of mass percentage, the light gold alloy target provided by the present invention includes 0.01-0.02 wt.% Nd. In the present invention, the addition of Sb, Si and Nd elements can effectively refine the grains of the light gold alloy and change the corrosion resistance of the light gold alloy, while the Si element can improve the brightness of the alloy.

[0029] The present invention also provides a method for preparing the shallow gold alloy target material described in the above scheme, comprising the following steps:

[0030] Au, Ag, Fe, In, Sb, Si, Nd and Zn are smelted, refined and poured to obtain a light gold alloy ingot;

[0031] The light gold alloy ingot is subjected to homogenization heat treatment, rolling and surface treatment in sequence to obtain the light gold alloy target.

[0032] The present invention refines and casts Au, Ag, Fe, In, Sb, Si, Nd and Zn after smelting to obtain a light gold alloy ingot. In the present invention, the purity of the metal Au is preferably ≥99.99wt.%, the purity of the metal Ag is preferably ≥99.99wt.%, the purity of the metal Zn is preferably ≥99.99wt.%, the purity of the metal Fe is preferably ≥99.99wt.%, the purity of the metal In is preferably ≥99.99wt.%, the purity of the metal Sb is preferably ≥99.99wt.%, the purity of the metal Si is preferably ≥99.99wt.%, and the purity of the metal Nd is preferably ≥99.95wt.%.

[0033] In the present invention, the smelting temperature is preferably not higher than 1250°C, and more preferably 1150-1250°C; the equipment used for the smelting is preferably a high-frequency vacuum induction melting furnace, a high-frequency furnace or a resistance furnace; the crucible used for the smelting is preferably a graphite crucible. In a specific embodiment of the present invention, it is preferred to heat and melt Au first, then add Ag for melting, then add Fe, In, Sb, Si and Nd metals in sequence, and finally add Zn for smelting; the Zn is preferably added with 0.05wt.% fire loss, that is, the amount of Zn added is preferably 0.05wt.% in excess.

[0034] In the present invention, the refining temperature is preferably 1150-1250°C, and the time is preferably 10-15 minutes; after the refining is completed, it is preferably left to stand for 5-10 minutes; and the mold used for pouring is preferably a cast iron mold.

[0035] A light gold alloy ingot is obtained. The present invention sequentially performs homogenization heat treatment, rolling and surface treatment on the light gold alloy ingot to obtain the light gold alloy target. In the present invention, the temperature of the homogenization heat treatment is preferably 600-650°C, and the heating rate to the temperature of the homogenization heat treatment is preferably 8-10°C / min; the time of the homogenization heat treatment is preferably 30-40min; after the homogenization treatment, it is preferably cooled to room temperature; the rolling is preferably cold rolling; the single pass reduction of the cold rolling is preferably 15-20%, and the total reduction is preferably 70-85%; the surface treatment method includes grinding and / or polishing.

[0036] In the present invention, the thickness of the light gold alloy target is preferably 2.5-3 mm; the specific size of the light gold alloy target is preferably cut according to the needs of the coating equipment.

[0037] The present invention also provides the use of the light gold alloy target material described in the above scheme or the light gold alloy target material prepared by the preparation method described in the above scheme in vacuum magnetron sputtering coating. In the present invention, the chromaticity value of the film layer obtained by the vacuum magnetron sputtering coating is: 90.2 to 92.4, the a value is 1.0 to -2.2, and the b value is 18.6 to 28.5.

[0038] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the following embodiments: PVD880B vacuum coating machine was used for coating experiment. Artificial sweat immersion and salt spray corrosion were used for corrosion resistance testing. Artificial sweat ingredients: sodium chloride (NaCl) 20g / L, ammonium chloride (NH4Cl) 17.5g / L, urea (CH4N2O) 5g / L, acetic acid (CH3COOH) 2.5g / L, lactic acid (C3H6O3) 15g / L and sodium hydroxide (NaOH), and the pH value of artificial sweat was adjusted to 4.7 by adjusting the sodium hydroxide content. Salt spray test ingredients: sodium chloride (NaCl) concentration 5±0.1%, after this test solution was sprayed at 35°C, the pH value of the collected solution should be 6.5-7.2.

[0040] The size of the target material prepared in the embodiment of the present invention is 60×60×3.0 mm.

[0041] Example 1

[0042] The preparation method of the light gold alloy target material comprises the following steps:

[0043] First, Au is heated and melted, and then metallic Ag is added. After Ag is melted, Fe, In, Sb, Si and Nd metals are added in sequence, and finally Zn is added for smelting, with 0.05% fire loss added to Zn. After all the metals are melted, they are stirred evenly, refined at 1250°C for 10 minutes, and after standing for 5 minutes, they are poured into a cast iron mold to obtain a light gold alloy ingot. After the light gold alloy ingot is subjected to homogenization heat treatment, rolling processing, and surface treatment, a light gold alloy target is obtained. Among them, the temperature of the homogenization heat treatment is 600°C, and the time is 0.5h. After the homogenization heat treatment, it is cooled to room temperature and cold rolled. The single-pass reduction is 15% and the total reduction is 70%. After leveling, shearing and other mechanical processing, a 3mm thick light gold alloy target is obtained, and its component content is: 85.0wt.% Au, 9.0wt.% Ag, 3.92wt.% Zn, 1.5wt.% Fe, 0.5wt.% In, 0.03wt.% Sb, 0.03wt.% Si, 0.02wt.% Nd.

[0044] The coating experiment was carried out using a PVD880B vacuum coating machine. The chromaticity of the film layer was: L=92.4, a=-2.2, b=18.6. The film layer's artificial sweat resistance test could reach 244 hours without discoloration, and the salt spray resistance test could reach 192 hours without corrosion.

[0045] Example 2

[0046] The preparation method of the light gold alloy target material comprises the following steps:

[0047] First, Au is heated and melted, and then metallic Ag is added. After Ag is melted, Fe, In, Sb, Si and Nd metals are added in sequence, and finally Zn is added for smelting, with 0.05% fire loss added to Zn. After all the metals are melted, they are stirred evenly, refined at 1250°C for 15 minutes, and after standing for 5 minutes, they are poured into a cast iron mold to obtain a light gold alloy ingot. After the light gold alloy ingot is subjected to homogenization heat treatment, rolling processing, and surface treatment, a light gold alloy target is obtained. Among them, the temperature of the homogenization heat treatment is 600°C, and the time is 0.5h. After the homogenization heat treatment, it is cooled to room temperature and cold rolled. The single-pass reduction is 15% and the total reduction is 70%. After leveling, shearing and other mechanical processing, a 3mm thick light gold alloy target is obtained, and its component content is: 85.6wt.% Au, 8.8wt.% Ag, 3.58wt.% Zn, 1.45wt.% Fe, 0.5wt.% In, 0.03wt.% Sb, 0.02wt.% Si, 0.02wt.% Nd.

[0048] The coating experiment was carried out using a PVD880B vacuum coating machine. The chromaticity of the film layer was: L=92.2, a=-2.0, b=19.3. The film layer could withstand artificial sweat for 260 hours without discoloration, and could withstand salt spray for 200 hours without corrosion.

[0049] Example 3

[0050] The preparation method of the light gold alloy target material comprises the following steps:

[0051] First, Au is heated and melted, and then metallic Ag is added. After Ag is melted, Fe, In, Sb, Si and Nd metals are added in sequence, and finally Zn is added for smelting, with 0.05% fire loss added to Zn. After all the metals are melted, they are stirred evenly, refined at 1250°C for 12 minutes, and after standing for 10 minutes, they are poured into a cast iron mold to obtain a light gold alloy ingot. After the light gold alloy ingot is subjected to homogenization heat treatment, rolling processing, and surface treatment, a light gold alloy target is obtained. Among them, the temperature of the homogenization heat treatment is 650°C and the time is 0.5h. After the homogenization heat treatment, it is cooled to room temperature and cold rolled. The single-pass reduction is 15% and the total reduction is 75%. After leveling, shearing and other mechanical processing, a 3mm thick light gold alloy target is obtained, and its component content is: 86.3wt.% Au, 8.5wt.% Ag, 3.34wt.% Zn, 1.4wt.% Fe, 0.4wt.% In, 0.02wt.% Sb, 0.02wt.% Si, 0.02wt.% Nd.

[0052] The coating experiment was carried out using a PVD880B vacuum coating machine. The chromaticity of the film layer was: L=92.0, a=-1.9, b=20.7. The film layer's artificial sweat resistance test could reach 272 hours without discoloration, and the salt spray resistance test could reach 208 hours without corrosion.

[0053] Example 4

[0054] The preparation method of the light gold alloy target material comprises the following steps:

[0055] First, Au is heated and melted, and then metallic Ag is added. After Ag is melted, Fe, In, Sb, Si and Nd metals are added in sequence, and finally Zn is added for smelting, with 0.05% fire loss added to Zn. After all the metals are melted, they are stirred evenly, refined at 1250°C for 10 minutes, and after standing for 5 minutes, they are poured into a cast iron mold to obtain a light gold alloy ingot. After the light gold alloy ingot is subjected to homogenization heat treatment, rolling processing, and surface treatment, a light gold alloy target is obtained. Among them, the temperature of the homogenization heat treatment is 600°C and the time is 40 minutes. After the homogenization heat treatment, it is cooled to room temperature and cold rolled. The single-pass reduction is 18% and the total reduction is 75%. After leveling, shearing and other mechanical processing, a 3mm thick light gold alloy target is obtained, and its component content is: 86.8wt.% Au, 8.4wt.% Ag, 2.95wt.% Zn, 1.4wt.% Fe, 0.4wt.% In, 0.02wt.% Sb, 0.02wt.% Si, 0.01wt.% Nd.

[0056] The coating experiment was carried out using a PVD880B vacuum coating machine. The chromaticity of the film layer was: L=92.0, a=-1.8, b=21.8. The film layer's artificial sweat resistance test could reach 296 hours without discoloration, and the salt spray resistance test could reach 216 hours without corrosion.

[0057] Example 5

[0058] The preparation method of the light gold alloy target material comprises the following steps:

[0059] First, Au is heated and melted, and then metallic Ag is added. After Ag is melted, Fe, In, Sb, Si and Nd metals are added in sequence, and finally Zn is added for smelting, with 0.05% fire loss added to Zn. After all the metals are melted, they are stirred evenly, refined at 1250°C for 10 minutes, and after standing for 8 minutes, they are poured into a cast iron mold to obtain a light gold alloy ingot. After the light gold alloy ingot is subjected to homogenization heat treatment, rolling processing, and surface treatment, a light gold alloy target is obtained. Among them, the temperature of the homogenization heat treatment is 600°C, and the time is 0.5h. After the homogenization heat treatment, it is cooled to room temperature and cold rolled. The single-pass reduction is 18%, and the total reduction is 75%. After leveling, shearing and other mechanical processing, a 3mm thick light gold alloy target is obtained, and its component content is: 87.5wt.% Au, 8.0wt.% Ag, 2.71wt.% Zn, 1.35wt.% Fe, 0.4wt.% In, 0.02wt.% Sb, 0.01wt.% Si, 0.01wt.% Nd.

[0060] The coating experiment was carried out using a PVD880B vacuum coating machine. The chromaticity of the film layer was: L=91.8, a=-1.6, b=23.0. The film layer's artificial sweat resistance test could reach 308 without discoloration, and the salt spray resistance test could reach 224h without corrosion.

[0061] Example 6

[0062] The preparation method of the light gold alloy target material comprises the following steps:

[0063] First, Au is heated and melted, and then metallic Ag is added. After Ag is melted, Fe, In, Sb, Si and Nd metals are added in sequence, and finally Zn is added for smelting, with 0.05% fire loss added to Zn. After all the metals are melted, they are stirred evenly, refined at 1250°C for 12 minutes, and after standing for 5 minutes, they are poured into a cast iron mold to obtain a light gold alloy ingot. After the light gold alloy ingot is subjected to homogenization heat treatment, rolling processing, and surface treatment, a light gold alloy target is obtained. Among them, the temperature of the homogenization heat treatment is 600°C, and the time is 0.5h. After the homogenization heat treatment, it is cooled to room temperature and cold rolled. The single-pass reduction is 18%, and the total reduction is 80%. After leveling, shearing and other mechanical processing, a 3mm thick light gold alloy target is obtained, and its component content is: 88.0wt.% Au, 7.8wt.% Ag, 2.57wt.% Zn, 1.3wt.% Fe, 0.3wt.% In, 0.01wt.% Sb, 0.01wt.% Si, 0.01wt.% Nd.

[0064] The coating experiment was carried out using a PVD880B vacuum coating machine. The chromaticity of the film layer was: L=91.7, a=-1.1, b=24.6. The film layer's artificial sweat resistance test could reach 316 hours without discoloration, and the salt spray resistance test could reach 232 hours without corrosion.

[0065] Example 7

[0066] The preparation method of the light gold alloy target material comprises the following steps:

[0067] First, Au is heated and melted, and then metallic Ag is added. After Ag is melted, Fe, In, Sb, Si and Nd metals are added in sequence, and finally Zn is added for smelting, with 0.05% fire loss added to Zn. After all the metals are melted, they are stirred evenly, refined at 1250°C for 10 minutes, and after standing for 5 minutes, they are poured into a cast iron mold to obtain a light gold alloy ingot. After the light gold alloy ingot is subjected to homogenization heat treatment, rolling processing, and surface treatment, a light gold alloy target is obtained. Among them, the temperature of the homogenization heat treatment is 600°C and the time is 35 minutes. After the homogenization heat treatment, it is cooled to room temperature and cold rolled. The single-pass reduction is 20% and the total reduction is 80%. After leveling, shearing and other mechanical processing, a 3mm thick light gold alloy target is obtained, and its component content is: 88.6wt.% Au, 7.6wt.% Ag, 2.22wt.% Zn, 1.25wt.% Fe, 0.3wt.% In, 0.01wt.% Sb, 0.01wt.% Si, 0.01wt.% Nd.

[0068] The coating experiment was carried out using a PVD880B vacuum coating machine. The film layer had a chromaticity of L=91.4, a=-0.7, and b=25.5. The film layer could withstand artificial sweat for 332 hours without discoloration, and could withstand salt spray for 248 hours without corrosion.

[0069] Example 8

[0070] The preparation method of the light gold alloy target material comprises the following steps:

[0071] First, Au is heated and melted, and then metallic Ag is added. After Ag is melted, Fe, In, Sb, Si and Nd metals are added in sequence, and finally Zn is added for smelting, with 0.05% fire loss added to Zn. After all the metals are melted, they are stirred evenly, refined at 1250°C for 10 minutes, and after standing for 5 minutes, they are poured into a cast iron mold to obtain a light gold alloy ingot. After the light gold alloy ingot is subjected to homogenization heat treatment, rolling processing, and surface treatment, a light gold alloy target is obtained. Among them, the temperature of the homogenization heat treatment is 600-650°C, and the time is 0.5h. After the homogenization heat treatment, it is cooled to room temperature and cold rolled. The single-pass reduction is 20%, and the total reduction is 85%. After leveling, shearing and other mechanical processing, a 3mm thick light gold alloy target is obtained, and its component content is: 89.2wt.% Au, 7.2wt.% Ag, 2.17wt.% Zn, 1.2wt.% Fe, 0.2wt.% In, 0.01wt.% Sb, 0.01wt.% Si, 0.01wt.% Nd.

[0072] The coating experiment was carried out using a PVD880B vacuum coating machine. The chromaticity of the film layer was: L=91.0, a=-0.2, b=26.8. The film layer's artificial sweat resistance test could reach 336 hours without discoloration, and the salt spray resistance test could reach 252 hours without corrosion.

[0073] Example 9

[0074] The preparation method of the light gold alloy target material comprises the following steps:

[0075] First, Au is heated and melted, and then metallic Ag is added. After Ag is melted, Fe, In, Sb, Si and Nd metals are added in sequence, and finally Zn is added for smelting, with 0.05% fire loss added to Zn. After all the metals are melted, they are stirred evenly, refined at 1250°C for 10 minutes, and after standing for 5 minutes, they are poured into a cast iron mold to obtain a light gold alloy ingot. After the light gold alloy ingot is subjected to homogenization heat treatment, rolling processing, and surface treatment, a light gold alloy target is obtained. Among them, the temperature of the homogenization heat treatment is 600°C, and the time is 0.5h. After the homogenization heat treatment, it is cooled to room temperature and cold rolled. The single-pass reduction is 20%, and the total reduction is 85%. After leveling, shearing and other mechanical processing, a 3mm thick light gold alloy target is obtained, and its component content is: 89.6wt.% Au, 7.0wt.% Ag, 2.07wt.% Zn, 1.1wt.% Fe, 0.2wt.% In, 0.01wt.% Sb, 0.01wt.% Si, 0.01wt.% Nd.

[0076] The coating experiment was carried out using a PVD880B vacuum coating machine. The chromaticity of the film layer was: L=90.6, a=0.6, b=27.1. The film layer's artificial sweat resistance test could reach 352 hours without discoloration, and the salt spray resistance test could reach 260 hours without corrosion.

[0077] Example 10

[0078] The preparation method of the light gold alloy target material comprises the following steps:

[0079] First, Au is heated and melted, and then metallic Ag is added. After Ag is melted, Fe, In, Sb, Si and Nd metals are added in sequence, and finally Zn is added for smelting, with 0.05% fire loss added to Zn. After all the metals are melted, they are stirred evenly, refined at 1250°C for 10 minutes, and after standing for 5 minutes, they are poured into a cast iron mold to obtain a light gold alloy ingot. After the light gold alloy ingot is subjected to homogenization heat treatment, rolling processing, and surface treatment, a light gold alloy target is obtained. Among them, the temperature of the homogenization heat treatment is 600°C, and the time is 0.5h. After the homogenization heat treatment, it is cooled to room temperature and cold rolled. The single-pass reduction is 20%, and the total reduction is 85%. After leveling, shearing and other mechanical processing, a 3mm thick light gold alloy target is obtained, and its component content is: 90.0wt.% Au, 6.8wt.% Ag, 2.07wt.% Zn, 1.0wt.% Fe, 0.1wt.% In, 0.01wt.% Sb, 0.01wt.% Si, 0.01wt.% Nd.

[0080] The coating experiment was carried out using a PVD880B vacuum coating machine. The chromaticity of the film layer was L=90.2, a=1.0, b=28.5. The film layer's artificial sweat resistance test could reach 360 hours without discoloration, and the salt spray resistance test could reach 264 hours without corrosion.

[0081] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A shallow gold alloy target, characterized in that: The invention comprises the following components in percentage by weight: Au 85-90wt.%, Ag 6.8-9.0wt.%, Zn 2.07-3.92wt.%, Fe 1.0-1.5wt.%, In 0.1-0.5wt.%, Sb 0.01-0.03wt.%, Si 0.01-0.03wt.%, Nd 0.01-0.02wt.%.

2. The method for preparing the shallow gold alloy target according to claim 1, characterized in that: The following steps are involved: Au, Ag, Fe, In, Sb, Si, Nd and Zn are smelted, refined and poured to obtain a light gold alloy ingot; The light gold alloy ingot is subjected to homogenization heat treatment, rolling and surface treatment in sequence to obtain the light gold alloy target.

3. The preparation method according to claim 2, characterized in that: The smelting temperature is not higher than 1250° C., and the smelting equipment used is a high-frequency vacuum induction melting furnace, a high-frequency furnace or a resistance furnace.

4. The preparation method according to claim 2, characterized in that: The refining temperature is 1150-1250° C., and the time is 10-15 minutes. After the refining is completed, the process further includes standing for 5-10 minutes.

5. The preparation method according to claim 2, characterized in that: The temperature of the homogenization heat treatment is 600-650° C., and the heating rate to the temperature of the homogenization heat treatment is 8-10° C. / min; the time of the homogenization heat treatment is 30-40 min.

6. The preparation method according to claim 2, characterized in that: The rolling is cold rolling.

7. The preparation method according to claim 6, characterized in that: The cold rolling has a single pass reduction of 15-20%, and a total reduction of 70-85%.

8. The preparation method according to claim 2, characterized in that: The surface treatment method includes grinding and / or polishing.

9. Use of the light gold alloy target material according to claim 1 or the light gold alloy target material prepared by the preparation method according to any one of claims 2 to 8 in vacuum magnetron sputtering coating.

10. The use according to claim 9, characterized in that: The chromaticity values ​​of the film layer obtained by vacuum magnetron sputtering coating are: L value is 90.2 to 92.4, a value is 1.0 to -2.2, and b value is 18.6 to 28.5.