CN103740968A - Process for preparing discoloration-resistant silver alloy - Google Patents
Process for preparing discoloration-resistant silver alloy Download PDFInfo
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- CN103740968A CN103740968A CN201310703485.6A CN201310703485A CN103740968A CN 103740968 A CN103740968 A CN 103740968A CN 201310703485 A CN201310703485 A CN 201310703485A CN 103740968 A CN103740968 A CN 103740968A
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Abstract
The invention relates to a process for preparing discoloration-resistant silver alloy. The process comprises the steps of mixing the following raw materials in parts by weight: 8.1-9.5 parts of silver, 0.15-0.65 part of cobalt, 0.05-0.15 part of nickel, 0.05-0.15 part of copper, 0.01-0.05 part of carbon and 0.01-0.20 part of aluminum; then, smelting in a vacuum melting furnace at high temperature, wherein the smelting temperature is 900-1,200 DEG C, and the smelting time is 4-6 hours; then, cooling, then, adding 0.04 part of magnesium, continuing to smelt, then, cooling, then, adding 0.06 part of indium, continuing to smelt, then, cooling, then, adding 0.20 part of zinc, continuing to smelt, and then, cooling, thereby obtaining final silver alloy. The silver alloy produced by the process disclosed by the invention is low in cost and good in machining and welding properties, is safe and non-toxic, and does not discolor during long-term use while exposed to atmospheric conditions.
Description
Technical field
The invention belongs to technical field of alloy material, particularly relate to a kind of manufacture craft of anti-tarnishing silver alloy.
Background technology
Silver alloy outward appearance is silvery white in color and has beautiful gloss, is mainly used in silver coin, silver-colored souvenir badge, silverware and silver jewellery.But silver alloys reacts and dark and gloomy variable color with muriate and sulfide, affect attractive in appearance and use.In recent years, in world wide, all carried out the research work of anti-tarnishing silver alloy aspect, under condition, improved the performance of silver alloys variable color cheaply, but producing little effect, fruitful anti-tarnishing silver alloy goods listing that so far there are no.
Summary of the invention
In order to solve the above problems, the invention provides a kind of manufacture craft of anti-tarnishing silver alloy,
1) will be by weight proportion: silver: 8.1～9.5 parts, cobalt: 0.15～0.65 part, nickel: 0.05～0.15 part, copper: 0.05～0.15 part, carbon: 0.01～0.05 part, aluminium: put high melt in vacuum melting furnace into after 0.01～0.20 part of raw material mixes, smelting temperature is: 900～1200 ℃, smelting time is: 4～6h;
2) ingot bar after step 1 melting is taken out to put into cooler cooling, cooling temperature is :-50～-35 ℃, be cooling time: 1～4h;
3) will put in vacuum melting furnace through the cooled ingot bar of step 2, and add to be by weight proportion simultaneously: the magnesium of 0.01～0.05 part, smelting temperature is: 700～1000 ℃, smelting time is: 5～7h;
4) ingot bar after step 3 melting is taken out to put into cooler cooling, cooling temperature is :-30～-25 ℃, be cooling time: 3～4h;
5) cooled step 4 ingot bar is put into vacuum melting furnace, add to be by weight proportion simultaneously: 0.03～0.10 part of indium, smelting temperature is: 600～900 ℃, smelting time is: 6～8h;
6) ingot bar after step 5 melting is taken out to put into cooler cooling, cooling temperature is :-25～-20 ℃, be cooling time: 4～6h;
7) cooled step 6 ingot bar is put into vacuum melting furnace, add to be by weight proportion simultaneously: the zinc of 0.12～0.35 part, smelting temperature is: 600～900 ℃, smelting time is: 4～6h;
8) ingot bar after step 7 melting is taken out to put into cooler cooling, cooling temperature is :-20～-15 ℃, be cooling time: 6～8h.
Preferred version is: in step 2, add part by weight to be: 0.04 part of magnesium.
Preferred version is: in step 5, add part by weight to be: 0.06 part of indium.
Preferred version is: in step 7, add part by weight to be: 0.20 part of zinc.
The silver alloys cost that the manufacture craft of application anti-tarnishing silver alloy of the present invention is produced is low, safety non-toxic, and mechanical workout and welding property are good, are exposed to life-time service nondiscoloration under atmospheric condition.
Embodiment
Embodiment 1
1) will be by weight proportion: silver: 8.1 parts, cobalt: 0.15 part, nickel: 0.05 part, copper: 0.05 part, carbon: 0.01 part, aluminium: put high melt in vacuum melting furnace into after 0.01 part of raw material mixes, smelting temperature is: 900 ℃, smelting time is: 6h;
2) ingot bar after step 1 melting is taken out to put into cooler cooling, cooling temperature is :-50 ℃, be cooling time: 1h;
3) will put in vacuum melting furnace through the cooled ingot bar of step 2, and add to be by weight proportion simultaneously: the magnesium of 0.01 part, smelting temperature is: 700 ℃, smelting time is: 5h;
4) ingot bar after step 3 melting is taken out to put into cooler cooling, cooling temperature is :-30 ℃, be cooling time: 3h;
5) cooled step 4 ingot bar is put into vacuum melting furnace, add to be by weight proportion simultaneously: 0.03 part of indium, smelting temperature is: 600 ℃, smelting time is: 6h;
6) ingot bar after step 5 melting is taken out to put into cooler cooling, cooling temperature is :-25 ℃, be cooling time: 4h;
7) cooled step 6 ingot bar is put into vacuum melting furnace, add to be by weight proportion simultaneously: the zinc of 0.12 part, smelting temperature is: 600 ℃, smelting time is: 4h;
8) ingot bar after step 7 melting is taken out to put into cooler cooling, cooling temperature is :-20 ℃, be cooling time: 6h.
Putting the silver alloy of preparing into concentration is that 8% sodium sulphite soaks 48 hours, and variable color does not occur silver alloys; Anti-oxidant test: 24 hours neutral salt spray tests, there is not variable color in silver alloy; 24 hours acetic acid salt spray tests, there is not metachromasia in silver alloy; 24 hours mantoquitas accelerate acetic acid salt spray test silver alloy oxidation area and account for 15% of the total area; 24 hours alternation salt-fog tests, silver alloy oxidation area accounts for 12% of the total area.
Embodiment 2
1) will be by weight proportion: silver: 9.5 parts, cobalt: 0.65 part, nickel: 0.15 part, copper: 0.15 part, carbon: 0.05 part, aluminium: put high melt in vacuum melting furnace into after 0.20 part of raw material mixes, smelting temperature is: 1200 ℃, smelting time is: 6h;
2) ingot bar after step 1 melting is taken out to put into cooler cooling, cooling temperature is :-35 ℃, be cooling time: 4h;
3) will put in vacuum melting furnace through the cooled ingot bar of step 2, and add to be by weight proportion simultaneously: the magnesium of 0.05 part, smelting temperature is: 1000 ℃, smelting time is: 7h;
4) ingot bar after step 3 melting is taken out to put into cooler cooling, cooling temperature is :-25 ℃, be cooling time: 4h;
5) cooled step 4 ingot bar is put into vacuum melting furnace, add to be by weight proportion simultaneously: 0.10 part of indium, smelting temperature is: 900 ℃, smelting time is: 8h;
6) ingot bar after step 5 melting is taken out to put into cooler cooling, cooling temperature is :-20 ℃, be cooling time: 6h;
7) cooled step 6 ingot bar is put into vacuum melting furnace, add to be by weight proportion simultaneously: the zinc of 0.35 part, smelting temperature is: 900 ℃, smelting time is: 6h;
8) ingot bar after step 7 melting is taken out to put into cooler cooling, cooling temperature is :-15 ℃, be cooling time: 8h.
Putting the silver alloy of preparing into concentration is that 10% sodium sulphite soaks 48 hours, and variable color does not occur silver alloys; Anti-oxidant test: 24 hours neutral salt spray tests, there is not variable color in silver alloy; 24 hours acetic acid salt spray tests, there is not metachromasia in silver alloy; 24 hours mantoquitas accelerate acetic acid salt spray test silver alloy oxidation area and account for 11% of the total area; 24 hours alternation salt-fog tests, silver alloy oxidation area accounts for 8% of the total area.
Embodiment 3
1) will be by weight proportion: silver: 8.8 parts, cobalt: 0. part, nickel: 0.08 part, copper: 0.10 part, carbon: 0.03 part, aluminium: put high melt in vacuum melting furnace into after 0.12 part of raw material mixes, smelting temperature is: 1000 ℃, smelting time is: 5h;
2) ingot bar after step 1 melting is taken out to put into cooler cooling, cooling temperature is :-40 ℃, be cooling time: 3h;
3) will put in vacuum melting furnace through the cooled ingot bar of step 2, and add to be by weight proportion simultaneously: the magnesium of 0.04 part, smelting temperature is: 800 ℃, smelting time is: 6h;
4) ingot bar after step 3 melting is taken out to put into cooler cooling, cooling temperature is :-28 ℃, be cooling time: 3h;
5) cooled step 4 ingot bar is put into vacuum melting furnace, add to be by weight proportion simultaneously: 0.06 part of indium, smelting temperature is: 700 ℃, smelting time is: 7h;
6) ingot bar after step 5 melting is taken out to put into cooler cooling, cooling temperature is :-22 ℃, be cooling time: 5h;
7) cooled step 6 ingot bar is put into vacuum melting furnace, add to be by weight proportion simultaneously: the zinc of 0.20 part, smelting temperature is: 800 ℃, smelting time is: 5h;
8) ingot bar after step 7 melting is taken out to put into cooler cooling, cooling temperature is :-18 ℃, be cooling time: 7h.
Putting the silver alloy of preparing into concentration is that 10% sodium sulphite soaks 48 hours, and variable color does not occur silver alloys; Anti-oxidant test: 24 hours neutral salt spray tests, there is not variable color in silver alloy; 24 hours acetic acid salt spray tests, there is not metachromasia in silver alloy; 24 hours mantoquitas accelerate acetic acid salt spray test silver alloy oxidation area and account for 9% of the total area; 24 hours alternation salt-fog tests, silver alloy oxidation area accounts for 6% of the total area.
Claims (4)
1. a manufacture craft for anti-tarnishing silver alloy, is characterized in that, step comprises:
1) will be by weight proportion: silver: 8.1～9.5 parts, cobalt: 0.15～0.65 part, nickel: 0.05～0.15 part, copper: 0.05～0.15 part, carbon: 0.01～0.05 part, aluminium: put high melt in vacuum melting furnace into after 0.01～0.20 part of raw material mixes, smelting temperature is: 900～1200 ℃, smelting time is: 4～6h;
2) ingot bar after step 1 melting is taken out to put into cooler cooling, cooling temperature is :-50～-35 ℃, be cooling time: 1～4h;
3) will put in vacuum melting furnace through the cooled ingot bar of step 2, and add to be by weight proportion simultaneously: the magnesium of 0.01～0.05 part, smelting temperature is: 700～1000 ℃, smelting time is: 5～7h;
4) ingot bar after step 3 melting is taken out to put into cooler cooling, cooling temperature is :-30～-25 ℃, be cooling time: 3～4h;
5) cooled step 4 ingot bar is put into vacuum melting furnace, add to be by weight proportion simultaneously: 0.03～0.10 part of indium, smelting temperature is: 600～900 ℃, smelting time is: 6～8h;
6) ingot bar after step 5 melting is taken out to put into cooler cooling, cooling temperature is :-25～-20 ℃, be cooling time: 4～6h;
7) cooled step 6 ingot bar is put into vacuum melting furnace, add to be by weight proportion simultaneously: the zinc of 0.12～0.35 part, smelting temperature is: 600～900 ℃, smelting time is: 4～6h;
8) ingot bar after step 7 melting is taken out to put into cooler cooling, cooling temperature is :-20～-15 ℃, be cooling time: 6～8h.
2. the manufacture craft of anti-tarnishing silver alloy according to claim 1, is characterized in that, adds part by weight to be in step 2: 0.04 part of magnesium.
3. the manufacture craft of anti-tarnishing silver alloy according to claim 1, is characterized in that, adds part by weight to be in step 5: 0.06 part of indium.
4. the manufacture craft of anti-tarnishing silver alloy according to claim 1, is characterized in that, adds part by weight to be in step 7: 0.20 part of zinc.
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| CN201310703485.6A CN103740968B (en) | 2013-12-19 | 2013-12-19 | A kind of manufacture craft of anti-tarnishing silver alloy |
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| CN201310703485.6A CN103740968B (en) | 2013-12-19 | 2013-12-19 | A kind of manufacture craft of anti-tarnishing silver alloy |
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| CN103740968A true CN103740968A (en) | 2014-04-23 |
| CN103740968B CN103740968B (en) | 2015-08-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441709A (en) * | 2016-01-20 | 2016-03-30 | 宋晓玲 | Process for preparing anti-discoloration silver alloy |
| CN110669957A (en) * | 2019-10-23 | 2020-01-10 | 依波精品（深圳）有限公司 | High-hardness anti-tarnishing silver alloy and preparation method thereof |
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| JPS60110867A (en) * | 1983-11-18 | 1985-06-17 | Mitsubishi Metal Corp | Surface hardened ag alloy member having excellent resistance to wear and corrosion |
| CN1382817A (en) * | 2002-03-11 | 2002-12-04 | 华中科技大学 | Anti-decolouring silver alloy and its preparing process |
| CN1644725A (en) * | 2004-01-20 | 2005-07-27 | 香港生产力促进局 | Tarnish-resistant hard silver alloy |
| EP1889930A1 (en) * | 2005-06-10 | 2008-02-20 | Tanaka Kikinzoku Kogyo Kabushiki Kaisha | Silver alloy having excellent reflectivity/transmissivity maintaining characteristics |
| CN102232121A (en) * | 2010-09-08 | 2011-11-02 | 深圳市大凡珠宝首饰有限公司 | Anti-tarnish silver alloy and method for manufacturing the same |
-
2013
- 2013-12-19 CN CN201310703485.6A patent/CN103740968B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60110867A (en) * | 1983-11-18 | 1985-06-17 | Mitsubishi Metal Corp | Surface hardened ag alloy member having excellent resistance to wear and corrosion |
| CN1382817A (en) * | 2002-03-11 | 2002-12-04 | 华中科技大学 | Anti-decolouring silver alloy and its preparing process |
| CN1644725A (en) * | 2004-01-20 | 2005-07-27 | 香港生产力促进局 | Tarnish-resistant hard silver alloy |
| EP1889930A1 (en) * | 2005-06-10 | 2008-02-20 | Tanaka Kikinzoku Kogyo Kabushiki Kaisha | Silver alloy having excellent reflectivity/transmissivity maintaining characteristics |
| CN102232121A (en) * | 2010-09-08 | 2011-11-02 | 深圳市大凡珠宝首饰有限公司 | Anti-tarnish silver alloy and method for manufacturing the same |
Non-Patent Citations (1)
| Title |
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| 薄海瑞等: "饰用银合金的开发及应用现状", 《铸造技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441709A (en) * | 2016-01-20 | 2016-03-30 | 宋晓玲 | Process for preparing anti-discoloration silver alloy |
| CN105441709B (en) * | 2016-01-20 | 2017-07-18 | 广东弘基时尚生态健康集团股份有限公司 | A kind of technique for preparing anti-tarnishing silver alloy |
| CN107058789A (en) * | 2016-01-20 | 2017-08-18 | 段小宁 | A kind of anti-tarnishing silver alloy |
| CN110669957A (en) * | 2019-10-23 | 2020-01-10 | 依波精品（深圳）有限公司 | High-hardness anti-tarnishing silver alloy and preparation method thereof |
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