CN101994017A - Process for melting silver palladium aluminum and zinc alloy through vacuum induction - Google Patents
Process for melting silver palladium aluminum and zinc alloy through vacuum induction Download PDFInfo
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- CN101994017A CN101994017A CN2009100133676A CN200910013367A CN101994017A CN 101994017 A CN101994017 A CN 101994017A CN 2009100133676 A CN2009100133676 A CN 2009100133676A CN 200910013367 A CN200910013367 A CN 200910013367A CN 101994017 A CN101994017 A CN 101994017A
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Abstract
The invention relates to a process for melting silver palladium aluminum and zinc alloy through vacuum induction, which is characterized in that a molybdenum crucible with stable thermodynamical performance is used for melting the silver palladium aluminum and zinc alloy in positive pressure atmosphere in an induction way. Compared the vacuum metallurgical technology such as electronic beams, plasma melting, vacuum self-consumption melting and the like, the vacuum induction melting technology of the invention has low equipment cost, is convenient to operate, has simple process and greatly reduces the alloy manufacture cost, so that the actual application of the silver palladium aluminum and zinc alloy becomes true. The process belongs to the process for melting the silver palladium aluminum and zinc alloy through the vacuum induction, which can avoid the reaction of crucible materials with active elements in the alloy in the melting process, can reduce the oxygen content of the alloy and can improve the purity of the melted alloy.
Description
Technical field
The present invention relates to vacuum metallurgy technology, relate in particular to a kind of technology of vacuum induction melting silver palladium aluminium-zinc alloy.
Background technology
Under present metallurgical technology condition, silver palladium aluminium-zinc alloy series material is owing to fusing point height, easily oxidation, easily air-breathing, adopt conventional aluminum oxide, this alloy of zirconium white crucible vacuum induction melting, even in the fusion process stove, charge into the rare gas element of certain pressure, alloy liquid can be subjected to the pollution of crucible material, fusion process can not normally carry out, and can not reach the desired quality standard of alloy.Therefore, at present external this class alloy of melting adopts advanced vacuum plasma smelting technique more, but the cost height of the molten alloy of this technology costs an arm and a leg.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can avoid in the fusion process that active element reacts in the crucible material and alloy, reduce the alloy oxygen level, improve the technology of the vacuum induction melting silver palladium aluminium-zinc alloy of molten alloy purity.
Technical scheme of the present invention is as follows:
Use thermodynamically stable molybdenum crucible, induction melting silver palladium aluminium zinc reactive alloys under malleation atmosphere; Detailed process is:
1) alloy material: get industrial fine silver by the atomic ratio of alloy requirement, high-purity palladium powder, aluminium-zinc alloy;
2) shove charge: the palladium powder crucible bottom of packing into, fine silver is packed into above the palladium powder, and with the aluminium-zinc alloy hopper of packing into, the fusion process middle and later periods adds;
3) before the melting: at first body of heater is vacuumized, when the vacuum tightness in the stove was lower than 1Pa, applying argon gas in the stove was between plus-pressure to 0.08～0.12MPa;
4) alloy melting: send electricity, fusing palladium powder and fine silver, all after the fusing, Turnover bunker adds aluminium-zinc alloy;
5) cast of alloy: after the whole fusings of described alloy raw material, refining is put only, when treating that temperature reaches between 900～950 ℃, and cast alloy liquid.
The principle of the invention is: the molybdenum crucible that the present invention adopts has very strong thermodynamic stability, can reduce the pollution that reacts and bring between active element and crucible in the alloy.Charge into rare gas element and keep malleation, reduce the volatilization of zinc, reduce the alloy oxygen level, the silver-colored palladium aluminium-zinc alloy that the melting purity is had relatively high expectations has sizable meaning.
Advantageous effect of the present invention is as follows:
1, the molybdenum crucible of invention employing has good thermodynamic stability, has significantly reduced the reaction between silver-colored palladium aluminium-zinc alloy fusion process and crucible.
2, the present invention is at the direct draught melting of rare gas element argon gas silver palladium aluminium-zinc alloy, effectively suppressed the kinetics process of active element and crucible reaction in the alloy liquid, and above-mentioned both combinations have melted out the silver-colored palladium aluminium-zinc alloy that oxygen level is lower than 900ppm.
3, process for vacuum induction smelting of the present invention, with respect to electron beam, plasma melting, vacuum consumable equal vacuum metallurgical technology, equipment cost is low, and is easy to operate, and technology is simple, greatly reduce the manufacturing cost of alloy, make the practical application of silver-colored palladium aluminium zinc class alloy become a reality.
Embodiment
Be further described below in conjunction with embodiments of the invention.
Embodiment 1
Adopt thermodynamically stable molybdenum crucible, induction melting silver palladium aluminium-zinc alloy under the malleation argon gas atmosphere, detailed process is:
1) crucible of melting adopts molybdenum crucible, purity 〉=99.9%;
2) alloy raw material: get industrial fine silver, high-purity palladium powder, aluminium-zinc alloy by atomic ratio and make raw material, weight percent is a silver in this alloy: palladium: aluminium: zinc=60: 18: 15: 7;
3) shove charge: shove charge in the following order: palladium powder, fine silver are packed in the molybdenum crucible, the aluminium-zinc alloy hopper of packing into, and the melting later stage adds;
4) melting is prepared: at first body of heater is vacuumized, and when the vacuum in the stove equals 1Pa, applying argon gas in the stove, plus-pressure is to 0.1Mpa;
5) alloy melting: send electricity, fusing palladium powder and fine silver, after the portion's of closing fusing, Turnover bunker adds aluminium-zinc alloy;
6) cast of alloy: with described alloy raw material all after the fusing, refining put only and, when treating that temperature reaches between 900～950 ℃, cast alloy liquid.Cast out silver-colored palladium aluminium-zinc alloy ingot casting.
The composition of present embodiment molten alloy sees Table 1:
The composition (weight percent) of table 1 vacuum induction melting silver palladium aluminium-zinc alloy
| Sample number | Silver | Palladium | Aluminium | Zinc | 0 |
| 1 | Surplus | 17.89 | 15.02 | 6.35 | 0.07 |
| 2 | Surplus | 17.93 | 15.03 | 6.97 | 0.08 |
| 3 | Surplus | 18.03 | 14.98 | 7.01 | 0.05 |
Annotate: this three stoves alloy cast ingot all adopts pig mold to cast
As seen: make raw material with high-purity palladium powder, the oxygen level of the silver-colored palladium aluminium-zinc alloy of melting can satisfy the needs of this alloy practical application fully less than 900ppm.
Embodiment 2
Adopt thermodynamically stable molybdenum crucible, induction melting silver palladium aluminium-zinc alloy under the malleation argon gas atmosphere, detailed process is:
1) crucible of melting adopts molybdenum crucible, purity 〉=99.9%;
2) alloy raw material: get industrial fine silver, high-purity palladium powder, aluminium-zinc alloy by atomic ratio and make raw material, weight percent is a silver in this alloy: palladium: aluminium: zinc=55: 23: 15: 7;
3) shove charge: shove charge in the following order: palladium powder, fine silver are packed in the molybdenum crucible, the aluminium-zinc alloy hopper of packing into, and the melting later stage adds;
4) melting is prepared: at first body of heater is vacuumized, and when the vacuum in the stove equals 1Pa, applying argon gas in the stove, plus-pressure is to 0.1Mpa;
5) alloy melting: send electricity, fusing palladium powder and fine silver, after the portion's of closing fusing, Turnover bunker adds aluminium-zinc alloy;
6) cast of alloy: with described alloy raw material all after the fusing, refining put only and, when treating that temperature reaches between 900～950 ℃, cast alloy liquid.Cast out silver-colored palladium aluminium-zinc alloy ingot casting.
The composition of present embodiment molten alloy sees Table 2:
The composition (weight percent) of table 2 vacuum induction melting silver palladium aluminium-zinc alloy
| Sample number | Silver | Palladium | Aluminium | Zinc | 0 |
| 1 | Surplus | 23.09 | 14.92 | 6.55 | 0.08 |
| 2 | Surplus | 23.13 | 15.08 | 6.65 | 0.06 |
| 3 | Surplus | 22.99 | 15.10 | 6.73 | 0.05 |
Annotating this three stoves alloy cast ingot all adopts pig mold to cast
As seen: make raw material with high-purity palladium powder, the oxygen level of the silver-colored palladium aluminium-zinc alloy of melting can satisfy the needs of this alloy practical application fully less than 900ppm.
Claims (1)
1. the technology of a vacuum induction melting silver palladium aluminium-zinc alloy is characterized in that: use thermodynamically stable molybdenum crucible, induction melting silver palladium aluminium zinc reactive alloys under malleation atmosphere; Detailed process is:
1) alloy material: get industrial fine silver by the atomic ratio of alloy requirement, high-purity palladium powder, aluminium-zinc alloy;
2) shove charge: the palladium powder crucible bottom of packing into, fine silver is packed into above the palladium powder, and with the aluminium-zinc alloy hopper of packing into, the fusion process middle and later periods adds;
3) before the melting: at first body of heater is vacuumized, when the vacuum tightness in the stove was lower than 1Pa, applying argon gas in the stove was between plus-pressure to 0.08～0.12MPa;
4) alloy melting: send electricity, fusing palladium powder and fine silver, after the portion's of closing fusing, Turnover bunker adds aluminium-zinc alloy;
5) cast of alloy: with described alloy raw material all after the fusing, refining put only and, when treating that temperature reaches between 900～950 ℃, cast alloy liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100133676A CN101994017A (en) | 2009-08-25 | 2009-08-25 | Process for melting silver palladium aluminum and zinc alloy through vacuum induction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100133676A CN101994017A (en) | 2009-08-25 | 2009-08-25 | Process for melting silver palladium aluminum and zinc alloy through vacuum induction |
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| CN101994017A true CN101994017A (en) | 2011-03-30 |
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| CN2009100133676A Pending CN101994017A (en) | 2009-08-25 | 2009-08-25 | Process for melting silver palladium aluminum and zinc alloy through vacuum induction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104651662A (en) * | 2013-11-21 | 2015-05-27 | 安泰科技股份有限公司 | Vacuum induction melting method for titanium-aluminum alloy target material |
-
2009
- 2009-08-25 CN CN2009100133676A patent/CN101994017A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104651662A (en) * | 2013-11-21 | 2015-05-27 | 安泰科技股份有限公司 | Vacuum induction melting method for titanium-aluminum alloy target material |
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Application publication date: 20110330 |