CN115044798B - Preparation method of Au-Ag-Cu-Ni-based alloy with improved hardness - Google Patents
Preparation method of Au-Ag-Cu-Ni-based alloy with improved hardness Download PDFInfo
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- CN115044798B CN115044798B CN202210725683.1A CN202210725683A CN115044798B CN 115044798 B CN115044798 B CN 115044798B CN 202210725683 A CN202210725683 A CN 202210725683A CN 115044798 B CN115044798 B CN 115044798B
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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
- C22C5/02—Alloys based on gold
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/14—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon
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Abstract
The invention belongs to the technical field of alloys, and particularly relates to a preparation method of an Au-Ag-Cu-Ni-based alloy with improved hardness and the Au-Ag-Cu-Ni-based alloy prepared by the method. The Au-Ag-Cu-Ni base alloy with improved hardness is specifically an Au-Ag-Cu-Ni base alloy, and the preparation method comprises the following steps: according to a certain proportion, the commercial 99.99% Au, 99.99% Ag, electrolytic Cu and electrolytic Ni are adopted as raw materials, the Cu-Gd intermediate alloy is prepared into Au-Ag-Cu-Ni alloy hollow ingots by high-frequency vacuum induction smelting, and then the hollow ingots are deformed and cogged to prepare tubes with certain specification, and then annealing is carried out. The Au-Ag-Cu-Ni-based alloy with improved hardness has microhardness of Hv360 or more. According to the influence of the cold deformation strengthening and ordered transformation of the alloy, the invention designs the high-hardness alloy which is used in a high wear-resistant state and is beneficial to expanding the application field of the alloy.
Description
Technical Field
The invention belongs to the technical field of alloys, and particularly relates to a preparation method of an Au-Ag-Cu-Ni-based alloy with improved hardness, and the Au-Ag-Cu-Ni-based alloy prepared by the preparation method.
Background
The Au-Ag-Cu-Ni alloy is an alloy which can be strengthened by heat treatment, and alloy materials with different hardness grades can be obtained by heat treatment. The Au-Cu alloy can form CuAu, cu at 400 DEG C 3 Au is ordered phase, au-Ni alloy can be amplitude-modulated decomposed below 520K, so that the alloy is obviously strengthened. The alloy can be adjusted in terms of its structure type and structure characteristics by heat treatment, and its strength.
The alloy can be adjusted in terms of its structure type and structure characteristics by heat treatment, and its strength. Alternative heat treatment process schemes are a thermomechanical treatment and a solution aging treatment. The two heat treatment modes respectively obtain different hardness grades. The deformation heat treatment is carried out after cold deformation, and the tissue is adjusted to remove internal stress. The temperature is generally below 300 ℃, the strengthening effect brought by cold processing is kept as much as possible during heat treatment, the internal stress is removed through low-temperature heat treatment, and the conductive ring is ensured not to deform due to the internal stress in subsequent processing. The hardness of the alloy is slightly lower than that of the alloy in a cold working state and is obviously higher than that of the alloy in a hot working state after low-temperature thermomechanical treatment. The solution aging treatment can lead the alloy to generate amplitude modulation decomposition and ordered transformation, so that the hardness of the alloy is obviously improved, the alloy can reach more than twice of a hot working state, and the wear resistance is also obviously improved.
Disclosure of Invention
In order to solve the technical problems, the invention designs a method for improving the hardness of Au-Ag-Cu-Ni-based alloy, and the optimal hardness is obtained through the following technical paths.
Specifically, the invention is realized through the following technical schemes:
in a first aspect, the present invention provides a method for preparing an Au-Ag-Cu-Ni-based alloy with increased hardness, specifically an Au-Ag-Cu-Ni-based alloy, wherein the Au-Ag-Cu-Ni-based alloy comprises the following components in percentage by weight: 14.5-18.5%, cu:10.0-14.0%, ni:4.0-7.0%, gd:0-1.0%, the balance of Au and unavoidable impurities. The Au-Ag-Cu-Ni-based alloy with improved hardness has microhardness of Hv360 or more.
The preparation method comprises the following steps: according to the proportion, the Au-Ag-Cu-Ni alloy hollow cast ingot is prepared by adopting the commercial 99.99 percent Au, 99.99 percent Ag, electrolytic Cu and electrolytic Ni as raw materials and adopting high-frequency vacuum induction smelting. And (3) forming a blank by cold deformation, wherein the pass deformation is about 10% -20%, the accumulated deformation is about 45% -60%, making a pipe with a certain specification, annealing at 200-350 ℃, and measuring the microhardness after heat treatment.
In a second aspect, the present invention provides an Au-Ag-Cu-Ni-based alloy with increased hardness prepared by the preparation method of the first aspect described above.
TABLE 1 processing technique (wt%)
| Cumulative cold deformation | 45-60％ |
| Heat treatment system | 200℃-350℃/1-3h，AC |
Compared with the prior art, the invention has the following beneficial effects:
according to the influence of the cold deformation strengthening and ordered transformation of the alloy, the invention designs the high-hardness alloy which is used in a high wear-resistant state and is beneficial to expanding the application field of the alloy.
Detailed Description
The invention will be further illustrated with reference to specific examples. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The specific techniques or conditions are not identified in the examples and are described in the literature in this field or are carried out in accordance with the product specifications. The reagents or equipment used were conventional products available for purchase through regular channels, with no manufacturer noted.
The experimental methods in the following examples are conventional methods unless otherwise specified. The test materials used in the examples described below, unless otherwise specified, are all commercially available products.
Example 1
The Au-Ag-Cu-Ni alloy comprises the following raw materials: 99.99% of Au, 99.99% of Ag, electrolytic Cu and electrolytic Ni are mixed according to the component proportion shown in the table 2, and are cast into a graphite crucible after being mixed and subjected to high-frequency vacuum induction smelting, so that the Au-14.5Ag-14.0Cu-6.0Ni alloy hollow cast ingot is obtained. And (3) finely turning the surface of the alloy ingot to remove surface pores, and performing cold rolling, wherein the deformation of cold rolling passes is 15%, and the accumulated deformation is within 55%, so as to obtain phi 22.5mm multiplied by 4.5mm multiplied by 300mm. The microhardness test Hv was 360 after Air Cooling (AC) heat treatment at 300 ℃/1 h.
TABLE 2 composition ratio of alloys in example 1
| Alloying element | Ag | Cu | Ni | Au |
| Content of | 14.5 | 14.0 | 6.0 | Bal. |
Example 2
The Au-Ag-Cu-Ni alloy comprises the following raw materials: 99.99% of Au, 99.99% of Ag, electrolytic Cu, electrolytic nickel and Cu-Gd intermediate alloy are proportioned according to the composition ratio of the table 3, and after being mixed, the mixture is cast into a graphite crucible after being subjected to high-frequency vacuum induction smelting, and an Au-18.5Ag-10.0Cu-4.0Ni-1.0Gd alloy cast ingot is obtained. And (3) finely turning the surface of the alloy ingot to remove surface pores, and performing cold rolling, wherein the deformation of cold rolling passes is 20%, the accumulated deformation is 60%, so as to prepare the alloy ingot with the diameter of 14.5mm multiplied by 3mm multiplied by 200mm. The microhardness test Hv after 200 ℃/2h of AC heat treatment was 375.
TABLE 3 composition ratio of alloys in example 2
| Alloying element | Ag | Cu | Ni | Gd | Au |
| Content of | 18.5 | 10.0 | 4.0 | 1.0 | Bal. |
Example 3
The Au-Ag-Cu-Ni alloy comprises the following raw materials: 99.99% of Au, 99.99% of Ag, electrolytic Cu, electrolytic nickel and Cu-Gd intermediate alloy are proportioned according to the composition ratio of the table 4, and after being mixed, the mixture is cast into a graphite crucible after being subjected to high-frequency vacuum induction smelting, and an Au-15.0Ag-12.0Cu-6.0Ni-0.42Gd alloy cast ingot is obtained. And (3) finely turning the surface of the alloy ingot to remove surface pores, performing cold rolling, wherein the deformation of cold rolling passes is 13%, and the accumulated deformation is controlled to be 50%, so as to prepare the alloy ingot with phi of 12.5mm multiplied by 2.5mm multiplied by 200mm. The microhardness test Hv was 362 after heat treatment at 350 ℃/1 h.
TABLE 4 composition ratio of alloys in example 3
| Alloying element | Ag | Cu | Ni | Gd | Au |
| Content of | 15.0 | 12.0 | 6.0 | 0.42 | Bal. |
Example 4
The Au-Ag-Cu-Ni alloy comprises the following raw materials: 99.99% of Au, 99.99% of Ag, electrolytic Cu and electrolytic Ni are mixed according to the component proportion shown in the table 5, and are cast into a graphite crucible after being mixed and subjected to high-frequency vacuum induction smelting, so that an Au-17.5Ag-10.0Cu-7.0Ni alloy cast ingot is obtained. And (3) finely turning the surface of the alloy ingot to remove surface pores, and performing cold rolling, wherein the deformation of cold rolling passes is 10%, the accumulated deformation is 45%, so as to prepare the alloy ingot with phi 27.5mm multiplied by 4mm multiplied by 200mm. The microhardness test Hv after 250 ℃/2h heat treatment was 380.
TABLE 5 composition ratio of alloys in example 4
| Alloying element | Ag | Cu | Ni | Au |
| Content of | 17.5 | 10.0 | 7.0 | Bal. |
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (2)
1. A preparation method of Au-Ag-Cu-Ni-based alloy with improved hardness is characterized by comprising the following steps: the Au-Ag-Cu-Ni base alloy with improved hardness is specifically an Au-Ag-Cu-Ni base alloy, and the preparation method comprises the following steps: the Au-Ag-Cu-Ni alloy comprises the following raw materials: 99.99% of Au, 99.99% of Ag, electrolytic Cu and electrolytic nickel, wherein the alloy comprises the following components in percentage by weight: 17.5%, cu:10.0%, ni:7.0 percent of Au and unavoidable impurities, mixing the components according to the proportion, casting the mixture into a graphite crucible after high-frequency vacuum induction smelting to obtain an Au-17.5Ag-10.0Cu-7.0Ni alloy cast ingot, finely turning the surface of the alloy cast ingot to remove surface pores, performing cold rolling, wherein the deformation of cold rolling passes is 10 percent, the accumulated deformation is 45 percent, preparing phi 27.5mm multiplied by 4mm multiplied by 200mm, and performing microhardness test Hv after heat treatment at 250 ℃/2h to be 380.
2. An Au-Ag-Cu-Ni-based alloy with improved hardness prepared by the preparation method of claim 1.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1213703A (en) * | 1998-09-28 | 1999-04-14 | 华中理工大学 | Pure gold and its prepn. method |
| CN1387585A (en) * | 2000-07-03 | 2002-12-25 | 小笠和男 | Hard noble-metal alloy member and process for producing same |
| US20140308158A1 (en) * | 2011-11-16 | 2014-10-16 | M. Technique Co., Ltd. | Solid metal alloy |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1213703A (en) * | 1998-09-28 | 1999-04-14 | 华中理工大学 | Pure gold and its prepn. method |
| CN1387585A (en) * | 2000-07-03 | 2002-12-25 | 小笠和男 | Hard noble-metal alloy member and process for producing same |
| US20140308158A1 (en) * | 2011-11-16 | 2014-10-16 | M. Technique Co., Ltd. | Solid metal alloy |
Non-Patent Citations (1)
| Title |
|---|
| "Au-20Ag-10Cu-(1-3)Ni 四元合金时效强化行为研究";张强;《中国优秀硕士学位论文全文数据库（工程科技Ⅰ辑）》(第第1期，期);第B022-95页 * |
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