CN115896529B - Platinum alloy for ornaments and preparation method thereof - Google Patents
Platinum alloy for ornaments and preparation method thereof Download PDFInfo
- Publication number
- CN115896529B CN115896529B CN202211397279.2A CN202211397279A CN115896529B CN 115896529 B CN115896529 B CN 115896529B CN 202211397279 A CN202211397279 A CN 202211397279A CN 115896529 B CN115896529 B CN 115896529B
- Authority
- CN
- China
- Prior art keywords
- alloy
- platinum
- platinum alloy
- melting
- ornaments
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910001260 Pt alloy Inorganic materials 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000956 alloy Substances 0.000 claims abstract description 35
- 238000002844 melting Methods 0.000 claims abstract description 35
- 230000008018 melting Effects 0.000 claims abstract description 35
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 239000010949 copper Substances 0.000 claims abstract description 19
- 238000003723 Smelting Methods 0.000 claims abstract description 17
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 17
- 239000011701 zinc Substances 0.000 claims abstract description 17
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- 230000006698 induction Effects 0.000 claims abstract description 10
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000005266 casting Methods 0.000 claims abstract description 8
- 150000002739 metals Chemical class 0.000 claims abstract description 6
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims abstract description 3
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000007670 refining Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000002932 luster Substances 0.000 abstract description 8
- 239000010953 base metal Substances 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 platinum group metals Chemical class 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910018879 Pt—Pd Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
Landscapes
- Adornments (AREA)
Abstract
A platinum alloy for use in ornaments, comprising by weight: 95 to 96.8 percent of platinum (Pt), 1.5 to 2.5 percent of palladium (Pd), 1 to 1.2 percent of copper (Cu), 0.5 to 0.8 percent of gallium (Ga) and 0.05 to 0.1 percent of zinc (Zn); the preparation method comprises the following steps: (1) preparing a Cu-Ga-Zn intermediate alloy: heating and melting Cu, ga and Zn in vacuum induction melting to obtain a master alloy material; (2) smelting a Pt alloy cast ingot: putting Pt, pd and intermediate alloy into a smelting furnace together, heating until all metals are melted and uniformly mixed, and casting into a die to form a platinum alloy cast ingot; (3) preparing a platinum alloy for ornaments: rolling the cast ingot obtained in the steps for multiple times to obtain the platinum alloy for ornaments; the platinum alloy provided by the invention has good mechanical properties, good color and luster, lower density and lower cost than the platinum alloy in the current market, and the competitiveness of the product is improved.
Description
Technical Field
The invention relates to the technical field of alloy ornaments, in particular to a platinum alloy for ornaments and a preparation method thereof.
Background
Platinum began in the 18 world and was applied to platinum ornaments. The platinum ornaments have soft white and bright luster, stable color, difficult oxidation and high strength, and can be used for inlaying precious stones. The melting point of platinum is higher, the melting temperature is 1700-1800 ℃, the melting difficulty of platinum is high, the processing difficulty and loss of platinum are higher than those of gold, and the processing cost of platinum is higher than that of gold. Pt990, pt950, pt900 are now mainly on the market. The main element of the existing platinum alloy is Pt, the other additive elements are mainly noble metals, and the most widely applied ornament platinum alloy in the market at present mainly comprises Pt-Pd, pt-Ir, pt-Ru and the like. In recent years, the jewelry industry is competing for daily use, and the price of platinum group metals (Pd, ir, ru and the like) is continuously rising in recent years, so that the price is a key factor affecting the cost, and on the premise of ensuring the color and the processing performance of the jewelry, how to reduce the cost and increase the market competitiveness is a research hotspot in the industry. The low-color-forming platinum alloy added with base metal has main alloying elements of Cu, co, etc. and the base metal element replaces expensive platinum group metal, so that the oxidation resistance of the alloy is reduced due to excessive base metal element. In addition, cu and Co are used for replacing part of platinum group metals, the excessive addition can reduce the color degree of the alloy, the platinum alloy is used as an ornament alloy, certain hardness is also required, the cutter sticking is caused by too soft, the loss is increased, and the platinum alloy cannot be used as an inlaid alloy. In addition, a small amount of Sn, zn, in, ga, ge, W and the like can be added, so that the fluidity can be increased, and the casting performance can be improved. The addition of microelements Ga, ge and the like can play a role in adjusting the processing performance of the alloy through a precipitation hardening mechanism as hardening elements, but excessive addition can cause too high hardness, is inconvenient for subsequent processing, and increases the cost of the alloy. High Ga content makes the alloy hard and brittle and the surface dull. Therefore, by reasonable element configuration, the development of the ornament platinum alloy with low melting point and low cost has important significance.
Disclosure of Invention
In order to overcome the above problems of the prior art, a first aspect of the present invention provides a platinum alloy for ornaments, comprising by weight: 95 to 96.8 percent of platinum (Pt), 1.5 to 2.5 percent of palladium (Pd), 1 to 1.2 percent of copper (Cu), 0.5 to 0.8 percent of gallium (Ga) and 0.05 to 0.1 percent of zinc (Zn).
In the invention, a small amount of copper is used for replacing high-value palladium, if the palladium is completely replaced, the color and luster of the platinum alloy are reduced, the oxidation resistance is reduced, the requirement of jewelry standards is not met, and the casting performance of the alloy is reduced. The platinum alloy prepared by adding the micro performance adjusting elements has good mechanical property, good color and luster, lower density and lower cost than the platinum alloy in the current market, increases the competitiveness of the product, and can develop ornament alloy with better quality by properly modifying binary alloy.
In a second aspect, the present invention provides a method for preparing a platinum alloy for ornaments according to the first aspect of the present invention, comprising the steps of:
(1) Preparing a Cu-Ga-Zn intermediate alloy: heating and melting Cu, ga and Zn in vacuum induction melting, maintaining the temperature at 800-1000 ℃, refining for 3-5 minutes, and naturally cooling to room temperature after refining is completed to obtain a master alloy material;
(2) Smelting a Pt alloy cast ingot: putting Pt, pd and intermediate alloy into a smelting furnace together, heating to 1600-1800 ℃, melting all metals, uniformly mixing, and casting into a die to form a platinum alloy cast ingot;
(3) Preparing a platinum alloy for ornaments: and (3) rolling the cast ingot obtained in the steps for multiple times, finally obtaining a bar with the diameter of about phi 8, and then obtaining the platinum alloy for ornaments through mechanical cutting.
Preferably, the heating and melting in step (1) are maintained at 850 to 900 ℃.
Preferably, the heating and melting in the step (2) are kept at 1600-1700 ℃.
The invention has the following excellent technical effects:
1. through reasonable element configuration, the platinum alloy with excellent performance, which can be used for ornament alloy, is obtained on the basis of reducing cost;
2. the platinum alloy has good mechanical property, good color and luster, lower density and lower cost than the platinum alloy in the current market, and increases the competitiveness of the product.
Detailed Description
The technical scheme of the present disclosure is described in detail below with specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Example 1
(1) The platinum alloy for ornaments comprises the following components by weight percent, namely Pt95.9wt%, pd2.2wt%, cu1wt%, ga0.8wt% Zn0.1wt%, raw material preparation, pt959 g, pd24 g, cu10 g, ga6 g and Zn1 g.
(2) Preparing a Cu-Ga-Zn intermediate alloy: heating and melting Cu, ga and Zn in vacuum induction melting, maintaining at 800 ℃, refining for 5 minutes, and naturally cooling to room temperature after refining is completed to obtain a master alloy material.
(3) Smelting a Pt alloy cast ingot: putting Pt, pd and intermediate alloy together into a smelting furnace, heating to 1700 ℃, melting all metals, uniformly mixing, and casting into a mould to form a platinum alloy cast ingot 1.
(4) Preparing a platinum alloy for ornaments: and (3) rolling the cast ingot obtained in the step (3) for multiple times, finally obtaining a bar with the diameter of about phi 8, and then obtaining the platinum alloy for ornaments through mechanical cutting.
Example 2
With reference to the conditions of example 1, only: heating and melting Cu, ga and Zn in the vacuum induction melting in the step (2), keeping the temperature at 850 ℃ and refining for 4 minutes; in the step (3), pt, pd and intermediate alloy are put into a smelting furnace together and heated to 1600 ℃.
Example 3
With reference to the conditions of example 1, only: heating and melting Cu, ga and Zn in the vacuum induction melting in the step (2), maintaining the temperature at 950 ℃ and refining for 3 minutes; in the step (3), pt, pd and intermediate alloy are put into a smelting furnace together and heated to 1800 ℃.
Example 4
(1) The platinum alloy for ornaments comprises the following components by weight ratio of 96.5wt% Pt96.75wt%, pd1.2wt%, cu1.2wt%, ga0.5wt% Zn0.05wt%, raw material preparation, 965 g Pt, 17.5g Pd, 12 g Cu, 5g Ga and 0.5g Zn.
(2) Preparing a Cu-Ga-Zn intermediate alloy: heating and melting Cu, ga and Zn in vacuum induction melting, maintaining at 1000 ℃, refining for 3 minutes, and naturally cooling to room temperature after refining is completed to obtain a master alloy material.
(3) Smelting a Pt alloy cast ingot: putting Pt, pd and intermediate alloy together into a smelting furnace, heating to 1600 ℃, melting all metals, uniformly mixing, and casting into a mould to form a platinum alloy cast ingot 2.
(3) Preparing a platinum alloy for ornaments: and rolling the cast ingot obtained in the steps at room temperature, finally obtaining a bar with the diameter of about phi 8, and obtaining the platinum alloy for ornaments through mechanical cutting.
Example 5
With reference to the conditions of example 4, only: heating and melting Cu, ga and Zn in the vacuum induction melting in the step (2), maintaining the temperature at 900 ℃, and refining for 4 minutes; in the step (3), pt, pd and intermediate alloy are put into a smelting furnace together and heated to 1700 ℃.
Example 6
With reference to the conditions of example 4, only: heating and melting Cu, ga and Zn in the vacuum induction melting in the step (2), keeping the temperature at 850 ℃ and refining for 5 minutes; in the step (3), pt, pd and intermediate alloy are put into a smelting furnace together and heated to 1800 ℃.
The platinum alloy for ornaments prepared by the embodiment has good mechanical property, good color and luster and lower density even if Pt, pd and intermediate alloy are put into a smelting furnace together and heated to 1600 ℃.
In addition, we prepared 3 combinations of gold as a comparison in the same manner, platinum alloy 3: pt95.55wt%, pd2.2wt%, cu1.2wt%, ga1wt% Zn0.05wt%, platinum alloy 4: pt96.5wt%, pd1.55wt%, cu1.4wt% G0.5wt% Zn0.05wt%, platinum alloy 5: pt96.5wt% and Pd3.5wt%. When the content of Ga exceeds a certain value, the hardness is too high, and the subsequent processing difficulty is increased, and annealing treatment is needed, so that the production flow is increased. According to the invention, through reasonable element configuration, on the basis of reducing the cost, the platinum alloy with excellent performance, which can be used for ornament alloy, is obtained. The platinum alloy has good mechanical property, good color and luster, lower density and lower cost than the platinum alloy in the current market, and increases the competitiveness of the product.
| Color and luster of | Hardness of | |
| Platinum alloy 1 | White color | 130～150 |
| Platinum alloy 2 | White color | 100～150 |
| Platinum alloy 3 | White color | 180～220 |
| Platinum alloy 4 | White color | 150～180 |
| Platinum alloy 5 | White color | 100～120 |
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (2)
1. A platinum alloy for use in ornaments, comprising by weight: 95 to 96.8 percent of platinum (Pt), 1.5 to 2.5 percent of palladium (Pd), 1 to 1.2 percent of copper (Cu), 0.5 to 0.8 percent of gallium (Ga) and 0.05 to 0.1 percent of zinc (Zn), comprising the following steps:
(1) Preparing a Cu-Ga-Zn intermediate alloy: heating and melting Cu, ga and Zn in vacuum induction melting, maintaining the temperature at 800-1000 ℃, refining for 3-5 minutes, and naturally cooling to room temperature after refining is completed to obtain a master alloy material;
(2) Smelting a Pt alloy cast ingot: putting Pt, pd and intermediate alloy into a smelting furnace together, heating to 1600-1800 ℃, melting all metals, uniformly mixing, and casting into a die to form a platinum alloy cast ingot;
(3) Preparing a platinum alloy for ornaments: rolling the cast ingot obtained in the steps for multiple times, finally obtaining a bar with the diameter phi 8, and mechanically cutting to obtain the platinum alloy for ornaments;
heating and melting in the step (1), and keeping the temperature at 850-900 ℃;
And (3) heating and melting in the step (2), and keeping the temperature at 1600-1700 ℃.
2. A method of making the platinum alloy for use in jewelry of claim 1, comprising the steps of:
(1) Preparing a Cu-Ga-Zn intermediate alloy: heating and melting Cu, ga and Zn in vacuum induction melting, maintaining the temperature at 800-1000 ℃, refining for 3-5 minutes, and naturally cooling to room temperature after refining is completed to obtain a master alloy material;
(2) Smelting a Pt alloy cast ingot: putting Pt, pd and intermediate alloy into a smelting furnace together, heating to 1600-1800 ℃, melting all metals, uniformly mixing, and casting into a die to form a platinum alloy cast ingot;
(3) Preparing a platinum alloy for ornaments: rolling the cast ingot obtained in the steps for multiple times, finally obtaining a bar with the diameter phi 8, and mechanically cutting to obtain the platinum alloy for ornaments;
heating and melting in the step (1), and keeping the temperature at 850-900 ℃;
And (3) heating and melting in the step (2), and keeping the temperature at 1600-1700 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211397279.2A CN115896529B (en) | 2022-11-09 | 2022-11-09 | Platinum alloy for ornaments and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211397279.2A CN115896529B (en) | 2022-11-09 | 2022-11-09 | Platinum alloy for ornaments and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115896529A CN115896529A (en) | 2023-04-04 |
| CN115896529B true CN115896529B (en) | 2024-07-12 |
Family
ID=86493170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211397279.2A Active CN115896529B (en) | 2022-11-09 | 2022-11-09 | Platinum alloy for ornaments and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115896529B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113913639A (en) * | 2021-09-30 | 2022-01-11 | 有研亿金新材料有限公司 | Precious metal alloy with low platinum content for ornaments and preparation method thereof |
| WO2022074363A1 (en) * | 2020-10-05 | 2022-04-14 | Alloyed Limited | A platinum alloy composition |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1582582A (en) * | 1977-02-23 | 1981-01-14 | Johnson Matthey Co Ltd | Jewellery alloys |
| JP2007520632A (en) * | 2004-02-04 | 2007-07-26 | アルゲマイネ ゴルト ウント ジィルバーシャイデアンシュタルト アーゲー | Platinum alloy and method for producing the same |
| DE102006007556A1 (en) * | 2006-02-16 | 2007-08-23 | Allgemeine Gold- Und Silberscheideanstalt Ag | Platinum alloy and process for its production |
| JP6922142B2 (en) * | 2020-01-20 | 2021-08-18 | 重靖 成瀬 | Hard platinum alloy for jewelry |
| CN112695224B (en) * | 2020-12-10 | 2022-04-01 | 山东省计量科学研究院 | Platinum-based hard alloy and preparation method thereof |
-
2022
- 2022-11-09 CN CN202211397279.2A patent/CN115896529B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022074363A1 (en) * | 2020-10-05 | 2022-04-14 | Alloyed Limited | A platinum alloy composition |
| CN113913639A (en) * | 2021-09-30 | 2022-01-11 | 有研亿金新材料有限公司 | Precious metal alloy with low platinum content for ornaments and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115896529A (en) | 2023-04-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108425029A (en) | A kind of not the argentiferous 18K of resistance to brittle failure rose golds and its processing technology | |
| KR20020043571A (en) | Hard noble-metal alloy member and process for producing the same | |
| CN109930026B (en) | High-strength high-conductivity stress relaxation-resistant copper alloy lead frame material and preparation method thereof | |
| CN102876916A (en) | Argentiferous gold-simulating copper alloy and preparation method thereof | |
| CN103898353A (en) | Copper alloy with high strength and high conductivity and preparation method thereof | |
| CN101654749A (en) | Easily-cutting brass and processing method of strips thereof | |
| CN110029247B (en) | High-discoloration-resistance golden brass alloy and preparation method thereof | |
| CN112695224B (en) | Platinum-based hard alloy and preparation method thereof | |
| CN115896529B (en) | Platinum alloy for ornaments and preparation method thereof | |
| CN107164651A (en) | A kind of jewellery pink colour silver alloy and preparation method thereof | |
| CN104357703A (en) | Rose-bengal 18 K gold and preparation method thereof | |
| CN113913639A (en) | Precious metal alloy with low platinum content for ornaments and preparation method thereof | |
| CN108467964A (en) | With the yellow as gold and corrosion resistant jewellery platinum alloy | |
| CN108796281A (en) | A kind of resistance to brittle failure and with being saturated roseate rose platinum alloy | |
| CN101255508B (en) | Rear-earth-containing polybasic yellow gold alloy and preparation method thereof | |
| KR102234078B1 (en) | Method for producing palladium-containing white gold alloy | |
| CN108796278A (en) | A kind of jewellery large deformation stamping resistance brownish red 18K billons and its technique | |
| KR101741681B1 (en) | Ag-Cu based alloy composition having high anti-discoloration and hardness and the manufacturing method thereof | |
| KR910000014B1 (en) | Cu-alloy having a gold or silver color and the method | |
| KR20140001017A (en) | 8 karat gold alloys for tarnish resistant and various colors | |
| CN108866377A (en) | Hydrogen sulfide corrosion-resistant, which changes colour, has the silver alloy and its processing technology of red appearance | |
| CN108823458A (en) | With aximal deformation value jewellery no nickel 14K platinum and its technique | |
| CN108796293A (en) | The resistance to wear-resistant low cost of brittle failure has roseate rose copper alloy | |
| CN108531765A (en) | A kind of corrosion-resistant resistance to brittle failure high intensity 10K billons of brown and its technique | |
| CN108728680A (en) | A kind of anticorrosive anti-wear jewellery material rose platinum alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |