CN113913639A - Precious metal alloy with low platinum content for ornaments and preparation method thereof - Google Patents
Precious metal alloy with low platinum content for ornaments and preparation method thereof Download PDFInfo
- Publication number
- CN113913639A CN113913639A CN202111163701.3A CN202111163701A CN113913639A CN 113913639 A CN113913639 A CN 113913639A CN 202111163701 A CN202111163701 A CN 202111163701A CN 113913639 A CN113913639 A CN 113913639A
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- Prior art keywords
- platinum
- content
- alloy
- copper
- ornaments
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/04—Alloys based on a platinum group metal
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C27/00—Making jewellery or other personal adornments
- A44C27/001—Materials for manufacturing jewellery
- A44C27/002—Metallic materials
- A44C27/003—Metallic alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/003—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals by induction
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/04—Refining by applying a vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Adornments (AREA)
Abstract
The invention provides a precious metal alloy with low platinum content for ornaments, which comprises the following components: platinum, copper, cobalt and zinc, wherein the platinum content is 58.5-75%, the copper content is 20.9-39.45%, the cobalt content is 1-4%, and the zinc content is 0.05-0.1%. The noble metal alloy has low processing cost, and the prepared platinum alloy has good mechanical property, good color and lower density, and is suitable for manufacturing large ornaments.
Description
Technical Field
The invention relates to the technical field of alloy ornaments, in particular to a preparation method of a precious metal alloy with low platinum content for ornaments.
Background
Platinum was applied to platinum ornaments starting from the 18 th world. The color of the platinum jewelry ornaments mainly comprises Pt990, Pt950, Pt900, Pt850 and Pt800 in the market. The development of the low-color platinum alloy ornament is beneficial to saving the platinum consumption, reducing the price of the platinum alloy ornament, increasing the market competitiveness, meeting the requirements of more young consumers and having good development prospect. Compared with the current platinum suitable ornament contract in the market, the low-color-forming platinum alloy has the advantages that the content of Pt is reduced, but the content of noble metal is still high on the whole, the content of platinum is 58.5-75 percent, and the platinum is equivalent to 14-18K color forming, so that the alloy still has high chemical stability, and the requirement of the ornament industry can be met. The main element of the existing platinum alloy is Pt, and other additive elements are mainly noble metals such as Rh/Rd/Ir/Ru. In recent years, with the increase of the price of the noble metals, the production cost is increasing, and although the price of platinum is a low point in recent years, the platinum alloy ornaments have no great competitive advantage in terms of finishing. And the research on the low-color platinum alloy for ornaments is less. The low-quality platinum alloy with base metals is mainly alloyed by Cu, Co and the like, and then a small amount of Sn, Zn, In, Ga, Ge, W and the like are added. Patent CN106244842B discloses a preparation method of high content hard platinum alloy PtCoX with Pt content > 89%. The platinum alloy for the ornaments with low platinum content provided by the invention can keep platinum white color despite the addition of base metals, has lower density, is more suitable for manufacturing larger ornaments, and has certain market application prospect.
Disclosure of Invention
The invention aims to provide a preparation method of a precious metal alloy for ornaments with low platinum content, which has low processing cost, and the prepared platinum alloy has good mechanical property, good color and lower density and is suitable for manufacturing large ornaments.
In order to solve the technical problems and prevent the shrinkage and pores in the platinum alloy, the invention selects the induction melting method under the protection of vacuum atmosphere. The invention provides a noble metal alloy with low platinum content for ornaments, which comprises the following components: platinum, copper, cobalt and zinc, wherein the platinum content is 58.5-75%, the copper content is 20.9-39.45%, the cobalt content is 1-4%, and the zinc content is 0.05-0.1%.
Further, the alloy consists only of platinum, copper, cobalt and zinc.
The invention also provides a preparation method of the low platinum content noble metal alloy for ornaments, which comprises the following steps:
firstly, heating and melting copper and zinc together by using a vacuum induction melting furnace;
secondly, putting the copper and the zinc melted in the first step together for refining, and naturally cooling to obtain an intermediate alloy;
thirdly, putting platinum and the intermediate alloy obtained in the second step into a vacuum induction melting furnace together, melting, uniformly mixing, and casting into a grinding tool to form a platinum alloy ingot;
and fourthly, rolling the cast ingot for multiple times to obtain a bar with the diameter of 10mm, and mechanically cutting to obtain a finished product.
The temperature range of the refining in the second step is 1100-1200 ℃, and the refining time is 3-5 min.
The refining temperature in the third step is 1800-2000 ℃.
The invention has the advantages of
The noble metal alloy for ornaments with low platinum content prepared by the method has low processing cost, and the prepared platinum alloy has good mechanical property, good color and lower density, and is suitable for manufacturing large ornaments.
Detailed Description
The following embodiments are described in detail to solve the technical problems by applying technical means to the present invention, and the implementation process of achieving the technical effects can be fully understood and implemented.
Selecting Pt with the purity of more than 99.95 percent, Cu with the purity of more than 99.999 percent, Co with the purity of more than 99.99 percent and Zn with the purity of more than 99.9 percent as raw materials.
Example 1
The platinum alloy for the ornament with the low platinum content comprises the following components, by weight, Pt58.5wt%, Cu9.45wt%, Co2 wt% and Zn0.05wt%. Raw material preparation, Pt585 g, Cu394.5 g, Co20 g, Zn0.5 g
Preparing a Cu-Zn intermediate alloy: and heating and melting Cu and Zn in a vacuum induction melting furnace, keeping the temperature at 1100-1200 ℃, refining for 3-5 minutes, and naturally cooling to room temperature after refining is finished to obtain the intermediate alloy material.
Smelting a Pt alloy ingot: and putting the platinum and the intermediate alloy into a vacuum induction melting furnace, heating to 1800-2000 ℃, and casting into a mold after all metals are melted and uniformly mixed to form a platinum alloy ingot.
Preparing a platinum alloy for ornaments: rolling the ingot obtained in the above steps for multiple times to obtain the diameter
And mechanically cutting the left and right bars to obtain the platinum alloy for the ornaments.
Example 2
The platinum alloy for the low platinum content ornaments comprises 75 wt% of Pt75 wt%, 20.9 wt% of Cu, 4 wt% of Co4 wt% and 0.1 wt% of Zns.
Raw material preparation, Pt750g, Cu209 g, Co40 g, Zn1 g
Preparing a Cu-Zn intermediate alloy: heating and melting Cu and Zn in vacuum induction melting, keeping the temperature at 1100-1200 ℃, refining for 3-5 minutes, and naturally cooling to room temperature after refining is finished to obtain the intermediate alloy material.
Smelting a Pt alloy ingot: putting platinum and the intermediate alloy into a vacuum induction melting furnace, heating to 1800-2000 ℃, and casting into a mold after all metals are melted and uniformly mixed to form a platinum alloy ingot.
(3) Preparing a platinum alloy for ornaments: rolling the cast ingot obtained in the step at room temperature, wherein the rolling reduction of each pass is 20-40%, and finally obtaining the diameter
And mechanically cutting the left and right bars to obtain the platinum alloy for the ornaments.
All of the above mentioned intellectual property rights are not intended to be restrictive to other forms of implementing the new and/or new products. Those skilled in the art will take advantage of this important information, and the foregoing will be modified to achieve similar performance. However, all modifications or alterations are based on the new products of the invention and belong to the reserved rights.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (5)
1. A low platinum content precious metal alloy for jewelry, comprising: platinum, copper, cobalt and zinc, wherein the platinum content is 58.5-75%, the copper content is 20.9-39.45%, the cobalt content is 1-4%, and the zinc content is 0.05-0.1%.
2. The low platinum content precious metal alloy for jewelry of claim 1 wherein: the alloy consists of platinum, copper, cobalt and zinc only.
3. A method for producing a noble metal alloy for ornaments with a low platinum content as claimed in claim 1 or 2, comprising:
firstly, heating and melting copper and zinc by using a vacuum induction melting furnace;
secondly, putting the copper and the zinc melted in the first step together for refining, and naturally cooling to obtain an intermediate alloy;
thirdly, putting Au, copper and cobalt together with the intermediate alloy obtained in the second step into a vacuum induction melting furnace, melting, uniformly mixing, and casting into a grinding tool to form a platinum alloy ingot;
and fourthly, rolling the cast ingot for multiple times to obtain a bar with the diameter of 10mm, and mechanically cutting to obtain a finished product.
4. A method of making a low platinum content precious metal alloy for jewelry as claimed in claim 3, wherein: the temperature range of the refining in the second step is 1100-1200 ℃, and the refining time is 3-5 min.
5. A method of making a low platinum content precious metal alloy for jewelry as claimed in claim 3, wherein: the refining temperature in the third step is 1800-2000 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111163701.3A CN113913639A (en) | 2021-09-30 | 2021-09-30 | Precious metal alloy with low platinum content for ornaments and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111163701.3A CN113913639A (en) | 2021-09-30 | 2021-09-30 | Precious metal alloy with low platinum content for ornaments and preparation method thereof |
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| CN113913639A true CN113913639A (en) | 2022-01-11 |
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| CN202111163701.3A Pending CN113913639A (en) | 2021-09-30 | 2021-09-30 | Precious metal alloy with low platinum content for ornaments and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115896529A (en) * | 2022-11-09 | 2023-04-04 | 有研亿金新材料有限公司 | Platinum alloy for ornaments and preparation method thereof |
Citations (6)
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|---|---|---|---|---|
| CN1961088A (en) * | 2004-02-04 | 2007-05-09 | 卡拉特铂金有限公司 | Platinum alloy and method of production thereof |
| CN101258253A (en) * | 2005-08-03 | 2008-09-03 | 金银手选工段公共股份公司 | Platinum alloy and method of production thereof |
| CN101263237A (en) * | 2005-08-03 | 2008-09-10 | 金银手选工段公共股份公司 | Platinum alloy and method of production thereof |
| CN108467964A (en) * | 2018-07-10 | 2018-08-31 | 广州宇智科技有限公司 | With the yellow as gold and corrosion resistant jewellery platinum alloy |
| CN108707777A (en) * | 2018-07-10 | 2018-10-26 | 广州宇智科技有限公司 | The corrosion-resistant platinum alloy of yellow with aging stability and its processing technology |
| CN112695224A (en) * | 2020-12-10 | 2021-04-23 | 山东省计量科学研究院 | Platinum-based hard alloy and preparation method thereof |
-
2021
- 2021-09-30 CN CN202111163701.3A patent/CN113913639A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1961088A (en) * | 2004-02-04 | 2007-05-09 | 卡拉特铂金有限公司 | Platinum alloy and method of production thereof |
| CN101258253A (en) * | 2005-08-03 | 2008-09-03 | 金银手选工段公共股份公司 | Platinum alloy and method of production thereof |
| CN101263237A (en) * | 2005-08-03 | 2008-09-10 | 金银手选工段公共股份公司 | Platinum alloy and method of production thereof |
| CN108467964A (en) * | 2018-07-10 | 2018-08-31 | 广州宇智科技有限公司 | With the yellow as gold and corrosion resistant jewellery platinum alloy |
| CN108707777A (en) * | 2018-07-10 | 2018-10-26 | 广州宇智科技有限公司 | The corrosion-resistant platinum alloy of yellow with aging stability and its processing technology |
| CN112695224A (en) * | 2020-12-10 | 2021-04-23 | 山东省计量科学研究院 | Platinum-based hard alloy and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115896529A (en) * | 2022-11-09 | 2023-04-04 | 有研亿金新材料有限公司 | Platinum alloy for ornaments and preparation method thereof |
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Application publication date: 20220111 |