CN102392152B - Lemon 18K gold and manufacturing method thereof - Google Patents
Lemon 18K gold and manufacturing method thereof Download PDFInfo
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- CN102392152B CN102392152B CN 201110378362 CN201110378362A CN102392152B CN 102392152 B CN102392152 B CN 102392152B CN 201110378362 CN201110378362 CN 201110378362 CN 201110378362 A CN201110378362 A CN 201110378362A CN 102392152 B CN102392152 B CN 102392152B
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Abstract
The invention discloses lemon 18K gold and a manufacturing method thereof. The lemon 18K gold contains 75% of gold in mass percentage and 25% of repaired mouth in mass percentage; the repaired mouth comprises silver, copper, zinc and iridium powder; the ratio of the silver and the zinc to the copper in mass percentage is 1.2-1.3; the mass percentage of the zinc is 2.5-3.5%; and the mass percentage of the iridium powder is 0.004-0.012%. The manufacturing method comprises the steps of burdening, melting, refining and casting; in the refining process, mechanical disturbance is added; and a mould is cast after being heated to 400-600DEG C. Through the invention, the problem that the traditional lemon 18K gold is bad in comprehensive mechanical property is solved.
Description
Technical field
The present invention relates to a kind of lemon yellow 18K gold and method of manufacture thereof, it belongs to mosaic gold alloy and method of manufacture class thereof.
Background technology
Bullion is represented quality with K usually with au-alloy, and 24K claims thousand pure golds or 99 gold medals, and content is 99.99%.It is 75% that common jewellery use gold Gold Content, is referred to as the 18K gold.It is metals such as Ni, Cu, Zn, Ag that 25% composition is arranged in the jewellery of 18K gold, and these are used to produce other metals of au-alloy, in the jewellery industry, are called repaired mouth.The mosaic gold alloy is that a kind of common bullion is used au-alloy, and so-called mosaic gold alloy (is that alloy is the basis Zn) with Au-Ag-Cu mostly.With au-alloy, color is one of its of paramount importance performance index for bullion.The color of au-alloy depends on its reflectivity and incident light frequency, is can be with transition mechanism in action in essence.People have carried out deep research to the color of au-alloy for a long time.As far back as twentieth century, the various proportionings of mosaic gold au-alloy and the corresponding relation of color are disclosed, and from prior art, can know, for the 18K gold, along with the variation of proportioning between Ag and the Cu, the color of 18K au-alloy can change in the scope of broad.In the 18K au-alloy of gold and silver, copper system, when Ag:Cu near 1.27 the time, the color that au-alloy demonstrates is lemon yellow.Lemon yellow ability is given a kind of pure and fresh beautiful visual experience of people, and lemon-yellow for a long time gold ornaments receives liking of people very much, and is very precious, but extremely rare in the market.Its reason is that when the ratio of the Ag:Cu in the 18K au-alloy is 1:1 its comprehensive mechanical performance is best, is fit to post-production.And when the ratio of copper in the ratio of Ag:Cu descends; Because the atomic radius of Cu will be much larger than the atomic radius of Ag, Cu to the reinforcement ability of Au much larger than Ag, when the ratio of Ag:Cu is near 7:5.5 for this reason; Though people have obtained comparatively ideal au-alloy color; But the final mechanical property after timeliness thermal treatment, the 18K au-alloy the when ratio of comparing Ag:Cu is 1:1, the final mechanical property after timeliness thermal treatment is far short of what is expected.Make it not to be suitable as the material of gold ornaments, satisfied not inlay the performance requriements of bullion with gold.People are attempting to improve through other certain methods the comprehensive mechanical performance of lemon yellow mosaic gold alloy always for this reason.Wherein through adding some other metallic elements, the solid solution effect through these its metallic elements that are added into and produce the second phase particle and improve performance.Wherein, adding refractory metal and oxide compound, carbide, sosoloid and intermetallic compound is important and common mode.Aforesaid mode all is the addings through these elements, thereby makes it in matrix metal, to separate out, disperse and microalloying strengthen matrix metal and the harden comprehensive mechanical performance of realizing promoting matrix metal.
In the prior art; One of topmost au-alloy grain-refining agent in the iridium, the most gold alloy all adopts iridium as grain-refining agent at present, and iridium is as high-melting, high stability metallic substance; Very easily in matrix metal, form core; Generally in the 18K gold, the content of iridium reaches 0.005% promptly has grain refining effect preferably, and content reaches at 0.01% o'clock has best grain refining effect.In the disclosed material of prior art, generally believe that with the grain-refining agent of iridium its difficult point is that the alloying of iridium is very difficult as au-alloy, the iridium master alloy that contains that whether can prepare good dispersibility is crucial.Because the manufacturing that contains the iridium master alloy of good dispersibility is difficulty very, produced cost is also very high, the still rarely found so far report of correlation technique.This point has limited the commercial applications of iridium as the grain-refining agent of au-alloy greatly, and obviously prior art has further improved necessity.
Summary of the invention
The object of the present invention is to provide a kind of lemon yellow 18K gold and method of manufacture thereof; It directly adopts iridium as grain-refining agent; And the adjustment through au-alloy repaired mouth composition; Simultaneously in melting process, be aided with mechanical disturbance, in casting cycle, be aided with the thermal control measure, the comprehensive mechanical performance of lemon yellow 18K gold is reached or the comprehensive mechanical performance when being 1:1 near the ratio of Ag:Cu.
A kind of lemon yellow 18K gold of the present invention and method of manufacture thereof; Contain by the gold of ratio of quality and the number of copies 75% and by the repaired mouth of ratio of quality and the number of copies 25%; Said repaired mouth component comprises silver, copper, zinc and iridium powder, it is characterized in that in the said repaired mouth that the ratio of the mass fraction that shared mass fraction of silver and zinc and copper are shared is 1.2-1.3, and the shared ratio of quality and the number of copies of said zinc is 2.5-3.5%; The ratio of quality and the number of copies 0.004-0.012% that said iridium powder is shared, for its method of manufacture may further comprise the steps:
A, by massfraction than gold and 25% the repaired mouth component of getting 75%; Wherein the repaired mouth component comprises silver, copper, zinc and iridium powder; The ratio of the shared mass fraction of silver and the shared mass fraction of zinc and copper is 1.2-1.3 in the said repaired mouth; The shared ratio of quality and the number of copies of said zinc is 2.5-3.5%, the ratio of quality and the number of copies 0.004-0.012% that said iridium is shared;
B, other repaired mouth component and massfraction except that iridium are inserted heat fused in the high frequency furnace than 75% gold, temperature of fusion is controlled at 1053-1200 ℃;
C, the iridium powder that will account for ratio of quality and the number of copies 0.004-0.012% join in the melt metal liquid; Adopt stirrer molten metal fully to be stirred with the rotating speed of 13-45 commentaries on classics/min; Churning time is 8min to 20min, and the Control for Kiln Temperature when simultaneously churning time being stopped is at 850 to 900 degree;
D, with heat to 400 to 600 degree of mould, molten metal is poured in the mould, the demoulding is taken out after the naturally cooling timeliness.
18K au-alloy of the present invention is lemon yellow, and the comprehensive mechanical performance of comprehensive mechanical performance when being 1:1 with the ratio in ratio of quality and the number of copies Ag:Cu of reaching in the repaired mouth, and such positively effect and following technical characterictic have confidential relation.
In repaired mouth, added zinc; Simultaneously correspondingly reduced silver-colored ratio, but the ratio of the shared mass fraction of totally that silver and zinc is shared mass fraction and copper is controlled in the 1.2-1.3 interval, belongs to the metal of white colour system owing to zinc itself; Reflectivity and galactic pole are approaching; Little for this, but the adding of zinc to the influence of colors of the finished product, effectively reduced the volume in the solid-state not consolute district in the au-alloy; Particularly reduced the volume in the solid-state not consolute of rich silver district, this has great significance to the over-all properties that promotes au-alloy.
In the fused process, adopt stirrer with the rotating speed of 13-45 commentariess on classics/min to fully stirring, such mechanical disturbance, to impel the iridium powder can by copper meltwater fast corrosion positive meaning arranged, can also guarantee that iridium examines the high dispersion in molten metal simultaneously.
Control for Kiln Temperature before the casting in alap scope, simultaneously, is warmed to the high point of certain temperature with mould, has avoided that the excessive temperature differentials owing to mould and molten metal produces excessive crystal grain in casting cycle.
Utilize iridium can be melted copper, the zinc institute corrosive characteristic of state fast, really connect and adopt the iridium powder as fining agent, avoided the process of producing of complicated iridium master alloy, the effective crystal grain thinning of iridium simultaneously can effectively be controlled the formation that rich silver distinguishes and grows up.
As preferably, stop first three minute in churning time and begin downward regulating and controlling furnace temperature, regulating and controlling furnace temperature will influence the abundant corrosion of iridium downwards too early.
As preferably, the order number of said iridium powder is between the 18-50 order, and too thick iridium powder is not easy to corrode fully, needs to prolong the fusion time, and meticulous iridium powder is melted impurity in the liquid easily and carries under one's arms and float in the point molten metal surface.
Embodiment
Below will combine preferred embodiment of the present invention to provide lemon yellow 18K gold and method of manufacture thereof that the present invention is described further.
Embodiment one: a kind of lemon yellow 18K gold and the method for manufacture thereof of this preferred embodiment; Contain by the gold of ratio of quality and the number of copies 75% and by the repaired mouth of ratio of quality and the number of copies 25%, said repaired mouth component comprises silver, copper, zinc and iridium, it is characterized in that the ratio of the mass fraction that shared mass fraction of silver and zinc in the said repaired mouth and copper are shared is 1.2; The shared ratio of quality and the number of copies of said zinc is 2.5%; The ratio of quality and the number of copies 0.005% that said iridium powder is shared, the order number of iridium powder is 50 orders, can be unique confirms in the said repaired mouth by ratio of quality and the number of copies silver to be 11.134% according to above qualifications; Zinc is 2.5%, copper is 11.361%, iridium is 0.005%, and its method of manufacture may further comprise the steps:
A, by massfraction than getting 75% gold and be 11.134% by ratio of quality and the number of copies silver, zinc is 2.5%, copper is 11.361%, iridium is 0.005%,
B, with massfraction than 75% gold and insert heat fused in the high frequency furnace by the silver of ratio of quality and the number of copies 11.134%, the zinc of 2.0 %, 11.361% copper, temperature of fusion is controlled at 1060 ℃;
C, the iridium powder that will account for ratio of quality and the number of copies 0.005 join in the melt metal liquid, adopt stirrer with the rotating speed of 30 commentariess on classics/min to fully stirring, churning time is 20min, the Control for Kiln Temperature when simultaneously churning time being stopped is spent 870;
D, mould is heated to 600 degree, molten metal is imported in the mould, the demoulding is taken out after the naturally cooling timeliness.
Embodiment two: a kind of lemon yellow 18K gold and the method for manufacture thereof of this preferred embodiment; Contain by the gold of ratio of quality and the number of copies 75% and by the repaired mouth of ratio of quality and the number of copies 25%, said repaired mouth component comprises silver, copper, zinc and iridium, it is characterized in that the ratio of the mass fraction that shared mass fraction of silver and zinc in the said repaired mouth and copper are shared is 1.27; The shared ratio of quality and the number of copies of said zinc is 3%; The ratio of quality and the number of copies 0.01% that said iridium powder is shared, the order number of iridium powder is 25 orders, can be unique confirms in the said repaired mouth by ratio of quality and the number of copies silver to be 10.981% according to above qualifications; Zinc is 3.0%, copper is 11.009%, iridium is 0.01%, and its method of manufacture may further comprise the steps:
A, by massfraction than getting 75% gold and be 10.981% by ratio of quality and the number of copies silver, zinc is 3%, copper is 11.009%, iridium is 0.01%,
B, with massfraction than 75% gold and insert heat fused in the high frequency furnace by the silver of ratio of quality and the number of copies 10.981%, 3% zinc, 11.009% copper, temperature of fusion is controlled at 1100 ℃;
C, the iridium powder that will account for ratio of quality and the number of copies 0.01 join in the melt metal liquid; Adopt stirrer with the rotating speed of 40 commentaries on classics/min to fully stirring; Churning time is 18min, stop first three minute in churning time and begin downward regulating and controlling furnace temperature, with Control for Kiln Temperature at 850 degree;
D, heat to 550 degree mould, fast molten metal is imported in the mould, the demoulding is taken out after the naturally cooling timeliness.
Embodiment three: a kind of lemon yellow 18K gold and the method for manufacture thereof of this preferred embodiment; Contain by the gold of ratio of quality and the number of copies 75% and by the repaired mouth of ratio of quality and the number of copies 25%, said repaired mouth component comprises silver, copper, zinc and iridium, it is characterized in that the ratio of the mass fraction that shared mass fraction of silver and zinc in the said repaired mouth and copper are shared is 1.30; The shared ratio of quality and the number of copies of said zinc is 3.5%; The ratio of quality and the number of copies 0.011% that said iridium is shared, the order number of iridium powder is 50 orders, can be unique confirms in the said repaired mouth by ratio of quality and the number of copies silver to be 10.624% according to above qualifications; Zinc is 3.5%, copper is 10.865%, iridium is 0.011%, and its method of manufacture may further comprise the steps:
A, by massfraction than getting 75% gold and be 10.624% by ratio of quality and the number of copies silver, zinc is 3.5%, copper is 10.865%, iridium is 0.011%,
B, with massfraction than 75% gold and insert heat fused in the high frequency furnace by the silver of ratio of quality and the number of copies 10.624%, 3.5% zinc, 10.865% copper, temperature of fusion is controlled at 1150 ℃;
C, the iridium powder that will account for ratio of quality and the number of copies 0.011 join in the melt metal liquid; Adopt stirrer with the rotating speed of 38 commentaries on classics/min to fully stirring; Churning time is 20min, stop first three minute in churning time and begin downward regulating and controlling furnace temperature, with Control for Kiln Temperature at 850 degree;
D, heat to 550 degree mould, molten metal is imported in the mould, the demoulding is taken out after the naturally cooling timeliness.
The performance of the 18K au-alloy of all preferred embodiments of the present invention all reaches or the comprehensive mechanical performance of 18K au-alloy when being 1:1 near the ratio of Ag:Cu in the repaired mouth.
In sum; A kind of lemon yellow 18K gold of the present invention and method of manufacture thereof; Contain by the gold of ratio of quality and the number of copies 75% and by the repaired mouth of ratio of quality and the number of copies 25%, said repaired mouth component comprises silver, copper, zinc and iridium powder, it is characterized in that the ratio of the mass fraction that shared mass fraction of silver and zinc in the said repaired mouth and copper are shared is 1.2-1.3; The shared ratio of quality and the number of copies of said zinc is 2.5-3.5%; The ratio of quality and the number of copies 0.004-0.012% that said iridium powder is shared for its method of manufacture comprises batching, fusing, refinement, casting, and is aided with mechanical disturbance in thinning process; And mould is warmed under 400 to the 600 degree states implements casting, the invention solves traditional not good problem of lemon yellow 18K gold comprehensive mechanical performance.
The above is merely embodiment of the present invention.But protection domain of the present invention is not limited thereto.Any technician who is familiar with the present technique field is in the technical scope that the present invention discloses, and the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention, and therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (3)
1. the method for manufacture of a lemon yellow 18K gold; Contain by the gold of ratio of quality and the number of copies 75% and by the repaired mouth of ratio of quality and the number of copies 25%; Said repaired mouth component comprises silver, copper, zinc and iridium powder, it is characterized in that in the said repaired mouth that the ratio of the mass fraction that shared mass fraction of silver and zinc and copper are shared is 1.2-1.3, and the shared ratio of quality and the number of copies of said zinc is 2.5-3.5%; The ratio of quality and the number of copies 0.004-0.012% that said iridium powder is shared, for its method of manufacture may further comprise the steps:
A, by massfraction than gold and 25% the repaired mouth component of getting 75%; Wherein the repaired mouth component comprises silver, copper, zinc and iridium powder; The ratio of the shared mass fraction of silver and the shared mass fraction of zinc and copper is 1.2-1.3 in the said repaired mouth; The shared ratio of quality and the number of copies of said zinc is 2.5-3.5%, the ratio of quality and the number of copies 0.004-0.012% that said iridium is shared;
B, other repaired mouth component and massfraction except that iridium are inserted heat fused in the high frequency furnace than 75% gold, temperature of fusion is controlled at 1053-1200 ℃;
C, the iridium powder that will account for ratio of quality and the number of copies 0.004-0.012% join in the melt metal liquid; Adopt stirrer molten metal fully to be stirred with the rotating speed of 13-45 commentaries on classics/min; Churning time is 8min to 20min, and the Control for Kiln Temperature when simultaneously churning time being stopped is at 850 to 900 degree;
D, with heat to 400 to 600 degree of mould, molten metal is poured in the mould, the demoulding is taken out after the naturally cooling timeliness.
2. the method for manufacture of a kind of lemon yellow 18K gold according to claim 1 is characterized in that stopping first three minute in churning time begins downward regulating and controlling furnace temperature.
3. the method for manufacture of a kind of lemon yellow 18K gold according to claim 1, the order number that it is characterized in that said iridium powder is between the 18-50 order.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110378362 CN102392152B (en) | 2011-11-24 | 2011-11-24 | Lemon 18K gold and manufacturing method thereof |
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| CN 201110378362 CN102392152B (en) | 2011-11-24 | 2011-11-24 | Lemon 18K gold and manufacturing method thereof |
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| CN102392152B true CN102392152B (en) | 2012-12-26 |
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| CN107794397B (en) * | 2017-11-15 | 2019-05-07 | 沈阳东创贵金属材料有限公司 | A kind of lemon yellow gold target material and preparation method thereof |
| MX2023002015A (en) | 2020-08-18 | 2023-04-11 | Enviro Metals Llc | Metal refinement. |
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| US6325839B1 (en) * | 1999-07-23 | 2001-12-04 | Jeneric/Pentron, Inc. | Method for manufacturing dental restorations |
| CN100336926C (en) * | 2004-05-27 | 2007-09-12 | 上海交通大学 | Semi-noble metal casing alloy for mouth repairing |
| JP4726205B2 (en) * | 2005-06-14 | 2011-07-20 | 田中電子工業株式会社 | Gold alloy wire for bonding wire with high initial bondability, high bond reliability, high roundness of crimped ball, high straightness and high resin flow resistance |
| US20100255338A1 (en) * | 2007-09-19 | 2010-10-07 | Citizen Holdings Co., Ltd. | Decorative part |
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