CN111455209A - Formula of 925 silver and preparation method thereof - Google Patents
Formula of 925 silver and preparation method thereof Download PDFInfo
- Publication number
- CN111455209A CN111455209A CN202010336593.4A CN202010336593A CN111455209A CN 111455209 A CN111455209 A CN 111455209A CN 202010336593 A CN202010336593 A CN 202010336593A CN 111455209 A CN111455209 A CN 111455209A
- Authority
- CN
- China
- Prior art keywords
- powder
- silver
- preparation
- smelting
- alloy
- 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.)
- Pending
Links
Classifications
-
- 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
- C22C5/06—Alloys based on silver
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a formula of 925 silver and a preparation method thereof, wherein the formula comprises the following raw materials in parts by weight: 92.5g of silver powder, 2g of pure nickel powder, 100g of glass powder, 10g of carbon powder, 2.5g of tin powder and 1g of magnesium powder. The invention discloses a formula of 925 silver and a preparation method thereof, wherein a silver-nickel alloy is used as a base material, and is smelted with tin powder and magnesium powder, so that the hardness and tensile strength of the prepared alloy are increased, the melting point is reduced, and impurities in the prepared new silver alloy are adsorbed by glass powder and carbon powder, so that the purity of the alloy is improved; the 925 silver alloy prepared by the invention has the characteristics of low melting point, high hardness and good tensile strength.
Description
Technical Field
The invention relates to the technical field of silver tool manufacturing, in particular to a formula of 925 silver and a preparation method thereof.
Background
The 925 silver raw material and finished products on the market at present use the traditional configuration and preparation method, namely a binary alloy formed by melting 92.5 percent of silver as a base material and 7.5 percent of copper as an auxiliary material, and the 925 silver with the traditional formula has a plurality of defects in the aspects of perception, the manufacturing process and the using process. For example, copper is added as a base material in the raw material, and the prepared alloy has no great change in melting point due to the characteristics of copper in the manufacturing process, but is extremely easy to crack and break in the cold-making process, so that the cold-making process is not suitable for cold-making; in the using process, because copper is added, green copper oxide can be generated locally after oxidation, and the attractiveness is affected; in perception, the color of the alloy can be greatly changed due to the characteristics of copper, and is greatly different from silver.
In addition, 925 silver on the market is high in melting point during manufacturing, so that a large amount of energy is consumed during smelting, manufacturing cost is increased, the 925 silver is high in abrasion degree and easy to deform due to the material problem in daily life, and copper is doped in the 925 silver, so that the 925 silver is extremely easy to oxidize and attractive.
Therefore, the problem to be solved by those skilled in the art is how to provide a 925 silver formula with high hardness and low melting point and a preparation method thereof.
Disclosure of Invention
In view of the above, the invention provides a formula of 925 silver with high hardness and low melting point and a preparation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme, which consists of the following raw materials in parts by weight: 92.5g of silver powder, 2g of pure nickel powder, 100g of glass powder, 10g of carbon powder, 2.5g of tin powder and 1g of magnesium powder.
Preferably, in the formula of 925 silver and the preparation method thereof, the preparation method comprises the following steps:
s1: preparing silver-nickel alloy as a base material from the pure silver powder and the pure nickel powder in parts by weight by a powder metallurgy method;
s2, preparing the glass powder, the carbon powder and the tin powder into mixed powder by weight, putting the mixed powder into a vacuum smelting furnace for smelting, and putting the base material on the mixed powder;
s3, raising the temperature of the vacuum smelting furnace to 850 ℃, smelting, and keeping the constant temperature for 5 minutes;
and S4, after the smelting is finished, cooling the product obtained after the smelting is finished to room temperature, and removing the smelting residues attached to the product to obtain the new 925 silver alloy.
Preferably, in the formula of 925 silver and the preparation method thereof, the pure silver powder is silver powder with a silver content of 99.9%; the glass powder is low-melting-point glass powder with the melting point of 750 ℃.
According to the technical scheme, compared with the prior art, the invention discloses a formula of 925 silver and a preparation method thereof, the invention adopts silver-nickel alloy as a base material, the prepared alloy is increased in hardness and tensile strength and reduced in melting point by smelting with tin powder and magnesium powder, and impurities in the prepared new silver alloy are adsorbed by glass powder and carbon powder, so that the purity of the alloy is improved; the 925 silver alloy prepared by the invention has the characteristics of low melting point, high hardness and good tensile strength.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention comprises the following raw materials by weight: 92.5g of silver powder, 2g of pure nickel powder, 100g of glass powder, 10g of carbon powder, 2.5g of tin powder and 1g of magnesium powder.
In order to further optimize the technical scheme, the preparation method comprises the following steps:
s1: preparing silver-nickel alloy as a base material from the pure silver powder and the pure nickel powder in parts by weight by a powder metallurgy method;
s2, preparing the glass powder, the carbon powder and the tin powder into mixed powder by weight, putting the mixed powder into a vacuum smelting furnace for smelting, and putting the base material on the mixed powder;
s3, raising the temperature of the vacuum smelting furnace to 850 ℃, smelting, and keeping the constant temperature for 5 minutes;
and S4, after the smelting is finished, cooling the product obtained after the smelting is finished to room temperature, and removing the smelting residues attached to the product to obtain the new 925 silver alloy.
In order to further optimize the technical scheme, the pure silver powder is silver powder with the silver content of 99.9 percent; the glass powder is low-melting-point glass powder with the melting point of 750 ℃.
In order to further optimize the technical scheme, the whole smelting process is carried out in a vacuum environment.
In order to further optimize the technical scheme, in the smelting process, a base material prepared from pure silver powder and pure nickel powder is mutually fused with tin powder and magnesium powder to form a semi-finished product, and simultaneously, glass powder and carbon powder are adhered to the semi-finished product in a gluing state under the smelting of a vacuum smelting furnace to adsorb trace impurities in the semi-finished product and ensure the mixing of carbon elements and metals.
In order to further optimize the technical scheme, the pure nickel powder and the pure silver powder are adopted to prepare the silver-nickel alloy in the preparation method, the prepared silver-nickel alloy has good oxidation resistance due to the characteristics of nickel, and the copper powder is not adopted as a base material ingredient in the preparation method, so that the phenomenon that the prepared finished product is oxidized into green is avoided.
In order to further optimize the technical scheme, the melting point of the new 925 silver alloy obtained after smelting is 586 ℃, the tensile strength is 297.3MPa, the elongation is 39 percent and the Vickers hardness is 1321.8MPa according to the conventional test detection; the melting point of the conventional 925 silver is 961.93 ℃, the novel 925 silver alloy prepared by the invention has a melting point lower than that of the 925 silver alloy prepared by a conventional preparation method, is easier to melt and process, and reduces the processing cost, and meanwhile, the novel 925 silver alloy has lighter weight and higher hardness than the conventional 925 silver alloy, so that a finished product is difficult to deform, wear and oxidize to a small extent.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. The formula of 925 silver and a preparation method thereof are characterized by comprising the following raw materials by weight: 92.5g of silver powder, 2g of pure nickel powder, 100g of glass powder, 10g of carbon powder, 2.5g of tin powder and 1g of magnesium powder.
2. The formula of 925 silver and its preparation method according to claim 1, characterized in that, the preparation method is as follows:
s1: preparing silver-nickel alloy as a base material from the pure silver powder and the pure nickel powder in parts by weight by a powder metallurgy method;
s2, preparing the glass powder, the carbon powder and the tin powder into mixed powder by weight, putting the mixed powder into a vacuum smelting furnace for smelting, and putting the base material on the mixed powder;
s3, raising the temperature of the vacuum smelting furnace to 850 ℃, smelting, and keeping the constant temperature for 5 minutes;
and S4, after the smelting is finished, cooling the product obtained after the smelting is finished to room temperature, and removing the smelting residues attached to the product to obtain the new 925 silver alloy.
3. The formulation and the preparation method of 925 Ag, according to claim 1, wherein the pure Ag powder is 99.9% Ag powder; the glass powder is low-melting-point glass powder with the melting point of 750 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010336593.4A CN111455209A (en) | 2020-04-26 | 2020-04-26 | Formula of 925 silver and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010336593.4A CN111455209A (en) | 2020-04-26 | 2020-04-26 | Formula of 925 silver and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111455209A true CN111455209A (en) | 2020-07-28 |
Family
ID=71676148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010336593.4A Pending CN111455209A (en) | 2020-04-26 | 2020-04-26 | Formula of 925 silver and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111455209A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005054268A (en) * | 2003-07-23 | 2005-03-03 | Sharp Corp | Silver alloy material, circuit board, electronic device and method of producing circuit board |
| CN101042946A (en) * | 2003-07-23 | 2007-09-26 | 夏普株式会社 | Silver alloy material, circuit board, electronic device and method of producing circuit board |
| CN107887051A (en) * | 2017-11-27 | 2018-04-06 | 钦州学院 | A kind of ageing-resistant front electrode silver slurry of crystal silicon solar energy battery and preparation method |
| CN108604475A (en) * | 2016-02-17 | 2018-09-28 | 纳美仕有限公司 | Conductive paste |
-
2020
- 2020-04-26 CN CN202010336593.4A patent/CN111455209A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005054268A (en) * | 2003-07-23 | 2005-03-03 | Sharp Corp | Silver alloy material, circuit board, electronic device and method of producing circuit board |
| CN101042946A (en) * | 2003-07-23 | 2007-09-26 | 夏普株式会社 | Silver alloy material, circuit board, electronic device and method of producing circuit board |
| CN108604475A (en) * | 2016-02-17 | 2018-09-28 | 纳美仕有限公司 | Conductive paste |
| CN107887051A (en) * | 2017-11-27 | 2018-04-06 | 钦州学院 | A kind of ageing-resistant front electrode silver slurry of crystal silicon solar energy battery and preparation method |
Non-Patent Citations (2)
| Title |
|---|
| 吴士平等: "《合金熔体处理及质量控制》", 31 December 2017 * |
| 王占学: "《塑性加工金属学》", 30 November 1991 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101246758B (en) | Sliding electric contact material for low current | |
| CN107794389A (en) | A kind of silver-tin oxide or indium oxide contact material and preparation method thereof | |
| CN110512115B (en) | High-strength high-elasticity conductive copper-titanium alloy bar and preparation method thereof | |
| CN102154572A (en) | Method for preparing sliver-tin oxide and indium oxide electrical contact material by gradient internal oxidation method and material thereof | |
| CN104263991A (en) | Method for preparing silver tin oxide contact materials by high pressure oxidation of alloy powder ingots | |
| CN101780607A (en) | Lead-free solder for electronic packaging, assembling and soldering and preparation method thereof | |
| CN103192203B (en) | Process method for preparing silver solder | |
| CN109500391A (en) | A kind of preparation method of high ductility silver zinc oxide contact material | |
| CN101651051B (en) | Cadmium-oxygen-silver multicomponent electrical contact material and preparation method thereof | |
| CN101950696B (en) | Manufacturing method of silver tin oxide contact alloy material | |
| CN114262815B (en) | Silver-metal oxide composite material, preparation method thereof and application of silver-metal oxide composite material as electrical contact material | |
| CN111455209A (en) | Formula of 925 silver and preparation method thereof | |
| CN110423908B (en) | Silver oxide, tin oxide and indium oxide electric contact material capable of rapidly oxidizing silver and preparation method | |
| CN110508800B (en) | Pre-alloy powder used for composite binder grinding tool for grinding hard and brittle materials, preparation method of pre-alloy powder and grinding tool | |
| CN109593981B (en) | Preparation method of silver tin oxide contact material for improving sintering property of ingot blank | |
| CN106854710A (en) | The preparation method and device of a kind of silver-based electric contact material | |
| CN102304640B (en) | Silver-base rare-earth alloy material and preparation method and application thereof | |
| CN101323064A (en) | Oxidation-resistance Sn-Cu leadless solder | |
| CN109609794A (en) | A kind of preparation method of high ductility sliver oxidized tin contactor materials | |
| CN104588672A (en) | Preparation method of in-situ doped copper-bearing tin oxide powder and silver tin oxide material | |
| CN103205595A (en) | Novel silver-based electrical contact material and preparation method thereof | |
| CN101831573A (en) | Alloy for manufacturing rotary side copper plate of chemical fiber crimping machine and processing method thereof | |
| US20020098108A1 (en) | 22k gold alloy compositions | |
| CN114086020B (en) | Preparation method of silver tin oxide electric contact material based on spontaneous thermal oxidation process and product thereof | |
| CN104201020B (en) | Manufacturing process of siller tin oxide calcium oxide electrical contact and products thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200728 |