CN1213703A - Pure gold and its prepn. method - Google Patents
Pure gold and its prepn. method Download PDFInfo
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- CN1213703A CN1213703A CN 98121614 CN98121614A CN1213703A CN 1213703 A CN1213703 A CN 1213703A CN 98121614 CN98121614 CN 98121614 CN 98121614 A CN98121614 A CN 98121614A CN 1213703 A CN1213703 A CN 1213703A
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Abstract
A solid gold contains such components (wt.%) as Au (greater than 99.0) and Ti (0.1-1.0) or Ti (0.1-0.95) plus Y (0.05-0.15). Its preparing process includes smelting at 1300-1700 deg.C under the protection of argon, solid dissolving, plasticizing, and ageing under 350 deg.C for 0.5-15 hr. Its advantages are high hardness up to 1.50 GPa, high strength and the same quality and apparance as pure gold.
Description
The present invention relates to a kind of pure gold and preparation method thereof.
The proof gold color and luster is attractive in appearance, corrosion-resistant, but intensity and hardness are very low, vickers hardness hv 0.588GPa, tensile strength sigma under 60% viscous deformation
b0.230GPa, next HV0.245-0.265GPa, the σ of being respectively of as-annealed condition
b0.120 GPa.In making and using, be vulnerable to wearing and tearing, distortion, bending even fracture by its ornament made and jewellery etc.Therefore, add elements such as Ag, Co, Cu usually, make 18K, 14K au-alloy, improving its performance, but these au-alloy Gold Contents reduce, and cause the decline of outward appearance and value.Application number 97116159.3, the Chinese patent application of publication number CN1179475A " au-alloy and preparation method thereof " provides a kind of pure gold and manufacture method thereof, this pure gold composition by weight is: 0.06%Co at least, at least 0.03%Ge, surplus is at least 99% or 99.9%Au and incidental impurities.Its preparation method is: at first provide the pure gold that meets aforementioned composition requirement ingot by melting, carry out 10～60 minutes ageing treatment then under 300 ℃～500 ℃ temperature; Perhaps under at least 700 ℃ temperature, after the solution heat treatment, carry out ageing treatment again to improve pure gold hardness.But the hardness of this pure gold is still lower, and whether Vickers' hardness and is not mentioned tensile strength and be improved below 1.47GPa.
The purpose of this invention is to provide a kind of tensile strength sigma
bThe high-performance pure gold material of 〉=0.500GPa, vickers hardness hv 1.37～1.76GPa improves wear resistance and bend resistance deformation ability simultaneously, realizes the pure gold material of this purpose, adds a small amount of Ti or Y in composition.Another object of the present invention provides the method for the above-mentioned high-performance pure gold of preparation, is characterized in the ingot casting that meets the requirement of required pure gold composition is carried out low temperature deformation thermal treatment, to improve and to improve its performance.
Realize this pure gold of the object of the invention, its composition weight percent is: Au 〉=99.0%, 0.1%＜Ti≤1.0%.
This pure gold, also can be in its composition weight percent:
Au≥99.0％、0.1％＜Ti≤0.95％、0.05％≤Y≤0.15％。
Above-mentioned pure gold can pass through solution treatment, plastic working and ageing treatment successively.
The method for preparing above-mentioned pure gold is: forms the ingot casting that meets above-mentioned pure gold composition weight percent by melting, carries out low temperature deformation thermal treatment then, wherein:
(1) fusion process carries out under argon shield;
(2) described low temperature deformation heat treatment step is followed successively by: to ingot casting carry out solution treatment,
Ageing treatment is carried out in plastic working again.
In this method for preparing pure gold, can limit:
The used purity of argon of fusion process 〉=99.99%, pressure 0.04-0.06MPa, 1300 ℃-1700 ℃ of smelting temperatures,
650 ℃-840 ℃ of solid solution temperatures,
Aging temperature≤350 ℃, time are 0.5-15 hour.
Aforesaid method can also further require:
Melting is carried out in medium-frequency induction furnace, 1500 ℃-1650 ℃ of temperature,
700 ℃-800 ℃ of solid solution temperatures,
Plastic processing contains annealing operation,
160 ℃-320 ℃ of aging temperatures, time 0.5-10 hour.
Pure gold of the present invention has good anti-damage ability, its tensile strength sigma in manufacturing and use
b〉=0.500GPa, vickers hardness hv can reach 1.5GPa, and welding property is good, can increase the degree of freedom of pure gold ornament, the design of jewellery style, and the color of pure gold at all also are better than proof gold no less than proof gold, visual appearance.
Further specify technique effect of the present invention below in conjunction with embodiment.
For the composition of controlling pure gold within specialized range, select for use purity at the raw material A u more than 99.9%, Ti, Y.Ti and Y are extremely active elements, and therefore the easy oxidation of heating vacuumizes medium-frequency induction furnace more than three times or three times before melting repeatedly under atmosphere; For vaporization at high temperature and the oxidation that suppresses alloy solution, melting under argon shield.Table 1 is the composition weight percent of three kinds of samples.
Pure gold need just can be made various section bars through casting and cold working.During plastic working, wish that pure gold has good plasticity, is easy to bear viscous deformation after the solution treatment; But, because the rising of resistance to deformation and the decline of plasticity in the deformation process often make the work in-process generation difficulty that continues distortion, is processed into desired shape and size, thereby can be in plastic history, increase annealing operation, to eliminate work hardening to continuing the influence of viscous deformation.In order to improve the mechanical property of finished product, the total deformation rate in the time of should increasing last plastic working.See Table two and table three.
When making finished product and using, wish that then it has sufficiently high intensity, hardness, wear-resistant, not yielding, bending with rupture.Yet drawing hardening effect is limited, and there is anisotropy in Deformation structure, thereby there are anisotropy in material mechanical performance and solidity to corrosion etc.For further improving the over-all properties of pure gold, after plastic working, carry out low temperature aging and handle.Three kinds of samples through the intensity of ageing treatment different time and hardness see Table 4 respectively, table 5, table 6.
Table 101
#, 02
#, 03
#Pure gold composition weight percent (%) Sample A u Ti Y element (impurity) 01
#99.03 0.96 0.0102
#99.08 0.81 0.096 0.01403
#99.02 0.87 0.100 0.01
Table 201#, 02#, 03# pure gold preparation technology () sample smelting temperature argon pressure solid solution temperature be the treatment time 01 fixedly
#800 ℃ of 1600 ℃ of 0.06MPa 30 minutes 02
#650 ℃ of 1600 ℃ of 0.06MPa 30 minutes 03
#810 ℃ of 1500 ℃ of 0.04MPa 30 minutes
Table 301#, 02#, 03# pure gold preparation technology (two)
The last plasticity sample of plastic working plastic processing number of times annealing number of times processing total deformation rate 01
#10 9 (800 ℃) 85%02
#10 9 (800 ℃) 85%03
#87 (810 ℃) 90%
Mechanical property time/hour 027 10HV/GPas 1.140 1.543 1.507 1.301 σs of table 401# pure gold behind 260 ℃ of ageing treatment different times
b/ GPa 0.503 0.679 0.665 0.661
Mechanical property time/hour 027 10HV/GPas 1.034 1.200 1.613 1.043 σs of table 502# pure gold behind 260 ℃ of ageing treatment different times
b/ GPa 0.498 0.539 0.548 0.548
Mechanical property time/hour 027 10HV/GPas 1.070 1.430 1.622 1.276 σs of table 603# pure gold behind 260 ℃ of ageing treatment different times
b/ GPa 0.510 0.567 0.564 0.565
Claims (6)
1, a kind of pure gold, its composition weight percent is:
Au≥99.0％,0.1％＜Ti≤1.0％。
2, a kind of pure gold as claimed in claim 1 is characterized by in its composition weight percent:
Au≥99.0％、0.1％＜Ti≤1.0％、0.005％≤Y≤0.15％。
3, a kind of pure gold as claimed in claim 1 or 2 is characterized by this pure gold and passes through solution treatment, plastic working and ageing treatment successively.
4, a kind of method for preparing pure gold forms the ingot casting that meets claim 1 or 2 described pure gold composition weight percents by melting, carries out low temperature deformation thermal treatment then, it is characterized by:
(1) fusion process carries out under argon shield,
(2) described low temperature deformation heat treatment step is followed successively by: ingot casting is carried out solution treatment, plastic working, carry out ageing treatment again.
5, method as claimed in claim 4 is characterized by:
The used purity of argon of fusion process 〉=99.99%, pressure 0.04～0.06MPa, molten
1300 ℃～1700 ℃ of refining temperature,
650 ℃～840 ℃ of solid solution temperatures,
Aging temperature≤350 ℃, time are 0.5～15 hour.
6, as claim 4 or 5 described methods, it is characterized by: melting is carried out in medium-frequency induction furnace, 1500 ℃～1650 ℃ of temperature, and solid solution temperature 700-800 ℃, plastic processing contains annealing operation,
160 ℃～320 ℃ of aging temperatures, 0.5～10 hour time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98121614A CN1093566C (en) | 1998-09-28 | 1998-09-28 | Pure gold and its prepn. method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN98121614A CN1093566C (en) | 1998-09-28 | 1998-09-28 | Pure gold and its prepn. method |
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| CN1213703A true CN1213703A (en) | 1999-04-14 |
| CN1093566C CN1093566C (en) | 2002-10-30 |
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| CN98121614A Expired - Fee Related CN1093566C (en) | 1998-09-28 | 1998-09-28 | Pure gold and its prepn. method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820671A (en) * | 2013-12-11 | 2014-05-28 | 广州番禺职业技术学院 | High-hardness pure gold material and preparation method thereof |
| CN105929668A (en) * | 2016-04-25 | 2016-09-07 | 尊尚（深圳）穿金戴银技术股份有限公司 | Pure gold watchcase, manufacturing method thereof and dial plate comprising pure gold watchcase |
| CN111992731A (en) * | 2020-09-18 | 2020-11-27 | 西安工程大学 | Method for preparing hard pure gold by powder metallurgy method |
| CN113621841A (en) * | 2021-07-26 | 2021-11-09 | 广东顺德周大福珠宝制造有限公司 | Purple alloy and preparation method and ornament thereof |
| CN115044798A (en) * | 2022-06-24 | 2022-09-13 | 有研工程技术研究院有限公司 | Preparation method of Au-Ag-Cu-Ni-based alloy with improved hardness |
| CN115109962A (en) * | 2022-06-24 | 2022-09-27 | 有研工程技术研究院有限公司 | Wear-resistant high-hardness gold-based alloy material for collector ring and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078259C (en) * | 1996-10-15 | 2002-01-23 | 住友金属矿山株式会社 | Gold alloy and manufacturing method therefor |
-
1998
- 1998-09-28 CN CN98121614A patent/CN1093566C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820671A (en) * | 2013-12-11 | 2014-05-28 | 广州番禺职业技术学院 | High-hardness pure gold material and preparation method thereof |
| CN103820671B (en) * | 2013-12-11 | 2016-06-15 | 广州番禺职业技术学院 | A kind of high rigidity pure gold material and preparation method thereof |
| CN105929668A (en) * | 2016-04-25 | 2016-09-07 | 尊尚（深圳）穿金戴银技术股份有限公司 | Pure gold watchcase, manufacturing method thereof and dial plate comprising pure gold watchcase |
| CN105929668B (en) * | 2016-04-25 | 2018-02-16 | 尊尚（深圳）穿金戴银技术股份有限公司 | Pure gold watchcase, manufacturing method thereof and watch comprising pure gold watchcase |
| CN111992731A (en) * | 2020-09-18 | 2020-11-27 | 西安工程大学 | Method for preparing hard pure gold by powder metallurgy method |
| CN113621841A (en) * | 2021-07-26 | 2021-11-09 | 广东顺德周大福珠宝制造有限公司 | Purple alloy and preparation method and ornament thereof |
| CN115044798A (en) * | 2022-06-24 | 2022-09-13 | 有研工程技术研究院有限公司 | Preparation method of Au-Ag-Cu-Ni-based alloy with improved hardness |
| CN115109962A (en) * | 2022-06-24 | 2022-09-27 | 有研工程技术研究院有限公司 | Wear-resistant high-hardness gold-based alloy material for collector ring and preparation method thereof |
| CN115044798B (en) * | 2022-06-24 | 2023-10-13 | 有研工程技术研究院有限公司 | Preparation method of Au-Ag-Cu-Ni-based alloy with improved hardness |
| CN115109962B (en) * | 2022-06-24 | 2023-10-13 | 有研工程技术研究院有限公司 | Wear-resistant high-hardness gold-based alloy material for bus ring and preparation method thereof |
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| CN1093566C (en) | 2002-10-30 |
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