CN102057067A - Method of producing precious metal alloy objects - Google Patents
Method of producing precious metal alloy objects Download PDFInfo
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- CN102057067A CN102057067A CN200980121747XA CN200980121747A CN102057067A CN 102057067 A CN102057067 A CN 102057067A CN 200980121747X A CN200980121747X A CN 200980121747XA CN 200980121747 A CN200980121747 A CN 200980121747A CN 102057067 A CN102057067 A CN 102057067A
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- metal alloys
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/003—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using inert gases
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- 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
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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
- C22C5/06—Alloys based on silver
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
- B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C—CHEMISTRY; METALLURGY
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Adornments (AREA)
- Materials For Medical Uses (AREA)
Abstract
The present invention provides a method for manufacturing a biocompatible precious metal alloy object. According to a first aspect melting of alloying elements and casting of the biocompatible precious metal alloy are carried out in a process chamber (11) being provided with a process gas of predetermined composition. A burning flame (19) of a hydrocarbon-containing gas provides low oxygen and water content. According to a second aspect post-processing of a precious metal alloy is made in atmosphere provided by the process gas to form the biocompatible precious metal alloy object. The biocompatible precious metal alloy object manufactured according to the invention has a low probability of causing sensitisation when in contact with the human body.
Description
Technical field
The present invention relates to precious metal alloys and manufacture method thereof.Especially, the precious metal alloys article such as the jewelry that the present invention relates to be intended to contact with human body contain the precious metal article with other, for example dental implant and decoration member.
Background technology
In the jewelry or other article that precious metal is generally used for being intended to contact with human body.The one reason is, it is littler that precious metal and most of elements are compared reactivity.Another reason is their high economic worths.In addition, precious metal has attracting gloss and high ductibility usually.The most famous precious metal is Jin Heyin, but other precious metal such as platinum also are generally used for identical purpose with palladium.
Be worn on precious metal article on the human body through frayed and damage.Because the risk of fracture is low, the ductility of precious metal is advantage, but precious metal has low relatively hardness, makes them be worn easily.In order to make them harder, also because precious metal expensive, the precious metal that is used for jewelry and implant etc. usually with other element formation alloy.Also can make precious metal form alloy to improve other character of precious metal, as for example obtaining certain gloss or color or improving processibility.
Known some owing to cause the pleoergy of dermatitis or anaphylaxis or allergy and can not wear jewelry or other decoration member.The allergen effect difference of different elements, precious metal has minimum effect usually.Be generally used in the alloying element of gold, nickel has been accredited as has the highest allergen effect.Therefore will be defined as at the nickel emission in the synthetic sweat the measuring of nickel-containing material allergenicity, and define threshold level (0.2 μ g/cm in (94/27/EC) in European Union's " nickel instruction (Nickel Directive) "
2/ week), be lower than this threshold level (0.2 μ g/cm
2/ week), article are considered to anallergic.Do not determine the similar threshold level of other alloying element as yet, but may also can cause sensitization by other alloying element (even silver, copper and gold).Because allergenic reaction etc. also can take place in the impurity in precious metal or the metal alloy.Because the raw-material impurity that uses or owing to the manufacturing of alloy causes impurity to occur.For example, if in the step of then casting step with precious metal or metal alloy with acid treatment to remove the oxide compound that on the casting article, forms, can increase impurity.Do not consider the reason of sensitization, be lower than to a certain degree, can think that the precious metal article are biocompatibilities if cause the possibility of sensitization.
A common understanding is: if only use the gold element of isozygotying of precious metal, anaphylaxis can not take place.Use conventional manufacture method may not produce nonallergenic precious metal alloys, the more important thing is that semifinished or finished goods may not have hardness as needs, fracture toughness, processibility, color etc.As mentioned above, the hardness of precious metal or metal alloy is important to wearability is provided.For example, the au-alloy that comprises alloying element gold and silver and copper is usually by with the manufacturing of getting off: the described alloying element of fusion in crucible, in mould with its casting with the moulding starting material, these starting material are further processed subsequently with the moulding finished article.In the manufacturing of precious metal alloys article, the typically cold or hot-work with starting material, and can carry out in finished article, obtaining thermal treatment and/or the cooling step that certain material character needs.This technology is never simple, for example, the hardness that increases owing to for example strain hardening during starting material cold working can cause difficulty owing to the processibility that reduces, otherwise, raw-material hot-work meeting reduces the processibility of alloy significantly, makes it be difficult to the moulding finished article.In addition, after casting raw material, alloy is crisp, need carry out extra annealing steps.
Summary of the invention
About being provided as the precious metal alloys article of material character biocompatibility and that have expection such as high rigidity and good processibility, there is defective in prior art.
The objective of the invention is to overcome the described defective of prior art.This finishes by biocompatibility precious metal alloys article according to the present invention and manufacture method thereof.
Be included in the step of moulding biocompatibility precious metal alloys article in the chamber according to the manufacture method of biocompatibility precious metal alloys article of the present invention.Described method further comprises providing to have based on every kg process gas less than 0.005kg H
2The water-content of O and less than the step of the process gas of the predetermined composition of 5% oxygen level.At least between the shaping period of described biocompatibility precious metal alloys article, in chamber, provide process gas.
According to a first aspect of the invention, the forming step of biocompatibility precious metal alloys article comprises for the moulding precious metal alloys, and alloying element is fused together step with the alloying element of fused of cast precious metal alloy.
According to a second aspect of the invention, the forming step of biocompatibility precious metal alloys article is included in that the aftertreatment precious metal alloys are raw-material step in the chamber, with the described biocompatibility precious metal alloys of moulding article.Preferred raw material the method according to this invention is made.Described aftertreatment for example can comprise soldering and/or melting welding.
According to one embodiment of the invention, the welding flux alloy that is suitable for the soldering of above-mentioned precious metal alloys starting material or article is made according to the manufacture method according to the biocompatibility precious metal alloys article of first aspect.
In one embodiment of the invention, the content of process gas and after this flame supplied with by gas containing hydrocarbon by burning of the environment in the chamber control.Burning is present in the oxygen in the described chamber thus.
Biocompatibility precious metal alloys article body made according to the method for the present invention has oxygen level for less than 5 μ g/g, preferably less than 3 μ g/g be more preferably less than 1 μ g/g; With hydrogen richness be less than 0.05 μ g/g, preferably less than 0.01 μ g/g be more preferably less than 0.005 μ g/g.
Biocompatibility precious metal alloys article according to the present invention preferably comprise 2% Ag.More preferably it is the au-alloy greater than 14 carats, or silver alloys.
Because the present invention can provide the biocompatibility precious metal alloys that can not cause sensitization when contacting with human body article.
Further advantage of the present invention provides has special (tailored) precious metal alloys article about the material character of for example hardness and processibility.Can be with these type of article as the starting material that carry out aftertreatment for the final precious metal alloys article of suitable material character such as high rigidity and high fracture toughness are arranged forming device.
Further again advantage of the present invention is to provide the biocompatibility precious metal alloys raw-material aftertreatment in special purpose workstation, to keep the raw-material special material character of biocompatibility precious metal alloys basically, this optimal seeking of raw and processed materials is made according to the method according to this invention.
Embodiment of the present invention limit in the dependent claims.Under situation about considering with claim in conjunction with the accompanying drawings, the detailed description, other purpose of the present invention, advantage and new feature will become apparent from of the present invention below.
Description of drawings
The preferred embodiments of the invention are now described with reference to the accompanying drawings, wherein:
Fig. 1 a-d is the synoptic diagram according to the embodiment of the manufacture method of precious metal alloys article of the present invention;
Fig. 2 a-b is the synoptic diagram according to chamber of the present invention;
Fig. 3 is the synoptic diagram that disposes crucible according to of the present invention on mould, wherein at mould and crucible intermediate configurations preheater;
Fig. 4 is used to make the synoptic diagram according to the inventive method of step of mould of finding time comprising of precious metal alloys; With
Fig. 5 is the synoptic diagram that is suitable for the chamber of aftertreatment according to of the present invention.
Embodiment
During the precious metal alloys article are made, usually the alloying element fusion is also cast subsequently with moulding precious metal alloys article (so-called starting material), subsequently these precious metal alloys article are comprised aftertreatment, with moulding precious metal alloys article such as jewelry as forging, melting welding, soldering, casting, grinding, polishing or stretching etc.Thereby one object of the present invention is to be provided as ought contacting with human body of biocompatibility and carries the manufacture method that Shi Buhui causes the precious metal article of sensitization.The example of these type of article is decoration element, dental implant of jewelry (comprise and wear body jewelry (piercing jewellery)), other kind etc. and above-mentioned starting material.Precious metal alloys composition according to the present invention comprises the precious metal alloys composition that is generally used for using as jewelry, dental implant and decoration member.This type of example is gold (22K, 18K, 14K etc.) and a sterling silver, yet is not limited to these.Although au-alloy constructed in accordance can be certain carat, it can or form differently to obtain for example certain gloss at content at slightly different on the content of main alloy element (Au, Ag, Cu) and other alloying element.In addition, although use the term alloy, the present invention is not limited to comprise the alloy of two or more materials.In addition, pure precious metal can use method of the present invention to make.
With reference to Fig. 1 a-d, may further comprise the steps according to the manufacture method of the biocompatibility precious metal alloys article of making by precious metal alloys of the present invention:
-100, moulding biocompatibility precious metal alloys article in chamber; With
-101, between described shaping period, in chamber 11, provide the process gas of predetermined composition at least, wherein said process gas has based on every kg process gas less than 0.005kg H
2The water-content of O and less than 5% oxygen level.
In one embodiment of the invention, forming step further may further comprise the steps:
-102, for the moulding precious metal alloys, alloying element is fused together; With
-103, the alloying element of fused of cast precious metal alloy, wherein fusion and casting step are comprising in chamber 11 in the controlled atmosphere of process gas and are carrying out.
In another embodiment of the invention, forming step comprises step 111, i.e. aftertreatment precious metal alloys in chamber 11 are with moulding biocompatibility precious metal alloys article.Aftertreatment is preferably being carried out on the precious metal alloys starting material according to above-mentioned fusion and the manufacturing of casting step.Yet the present invention is not limited to this, can use the starting material of making according to other method that are fit to.Aftertreatment can be carried out in the chamber 11 identical with the starting material manufacturing, perhaps carries out in the workstation chamber of another chamber such as special use.
In one embodiment of the invention, provide the step of process gas further to comprise step 104, promptly use the oxygen of the combustion flame burning process chambers 11 19 that utilize the gas containing hydrocarbon supply.
With reference to Fig. 2 a-b, preferred design chamber 11 consequently can provide in chamber 11 and the isolated controlled atmosphere of ambient air.In one embodiment of the invention, in order to have the net flow (netflow) of gas, provide the step of process gas to comprise for example by using vacuum breaker or pump in chamber 11, to produce the step of overvoltage from chamber 11 inside to chamber 11 outsides.Suitable overvoltage also can by means of have by air lock system (airlock system) 28 the mouth (door) net flow keep.This also automatically provides controlled atmosphere in air lock system.
Fig. 2 a schematically illustrates the chamber 11 according to one embodiment of the invention.Preferably before the fusion of alloying element and the casting and during, by the flame 19 that burning is supplied with at the indoor gas containing hydrocarbon of technology, in chamber 11, provide the process gas of predetermined composition.Combustion processes is reduced at least the oxygen level of chamber 11 less than 5%, preferably less than 2% be more preferably less than 1%.In addition, can use dehydration equipment 21.This water-content that limits process gas to based on every kg air at least less than 0.01kg H
2O is preferably based on every kg air less than 0.005kg H
2O, most preferably based on every kg air less than 0.001kg H
2O.Chamber 11 can further comprise the crucible 13 that is disposed on the mould 15, for example inner so-called molding box (flask) that comprises gypsum mixtures of described mould 15, and this is well known to those skilled in the art.Be provided in the crucible 13 alloying element and fusion.With mould 15 by the fused alloying element is partially filled at least, precious metal alloys article moulding in mould 15 after fused alloying element solidifies.
Fig. 2 b schematically illustrates the chamber 11 that is suitable for according to the fusion and the casting of one embodiment of the invention.The process gas of predetermined composition is finished by supplying with gas containing hydrocarbon to the combustion flame 19 in chamber 11 in the chamber 11.For example, gas containing hydrocarbon can be the mixture (being melting welding flame) of oxygen and acetylene, wherein regulates oxygen/acetylene ratio to supply with reducing flame (overrich mixture).Combustion processes is reduced at least the oxygen level of chamber 11 less than 5%, preferably less than 2% be more preferably less than 1%.In addition, using dehydration equipment 21, is that every kg air is at least less than 0.01kg H with the water-content that limits process gas
2O, preferred every kg air is less than 0.005kg H
2O, most preferably every kg air is less than 0.001kg H
2O.Chamber 11 may further include the crucible 13 on the mould 15 that is disposed at the so-called molding box (flask) that comprises gypsum mixtures.Alloying element is positioned in the crucible 13.Induction heating by induction heater 25 can be used for fused alloying element, subsequently with described alloying element with melt form, for example by can open in the bottom of crucible 13, closable opening is supplied to mould 15.Precious metal alloys article moulding in mould 15 after melt solidifies.
In one embodiment of the invention, provide the step of described first process gas further to comprise to supply with step such as shielding gas such as nitrogen, argon gas etc. to chamber 11.This shielding gas can also can play the effect of rare gas element as the method for removing ambient air from chamber during fusion and casting.
In one embodiment of the invention, provide the step of described first process gas to comprise step 106, that is, use first process gas of dehydration equipment 21 dry predetermined compositions.This can be for example by with the water vapor condensation in first process gas on cold surface and the relief outlet that leads (drain) finish.
In one embodiment of the invention, this method further may further comprise the steps: before casting the fused alloying element, and the gas of from mould 15, finding time for example by an end that vacuum pump is connected to mould 15.
In an embodiment of the method according to this invention, evacuation step further comprises: dry inert gas, the rare gas element of optional preheating and optional preheating inert gas flow by mould was provided before casting.Rare gas element can be supplied with by the process gas of predetermined composition.One alternative is for supplying with the rare gas element of another composition.For the application, rare gas element is interpreted as meaning that to have water-content be that every kg air is less than 0.005kg H
2O and oxygen level are the gas less than 5%.
In one embodiment of the invention, the drying of rare gas element for example uses the dehydration equipment 21 of freezing type drier (refrgeration drier) form to realize.With the gas pump of chamber 11 to freezing type drier, wherein with the water vapor condensation in the gas and from gas, remove.Dry gas can be back to chamber 11 then.
With reference to Fig. 3, in an embodiment of method of the present invention, mould 15 for example is preheated to about 350-400 ℃ in independent stove.Thereafter, forehearth 17, mould 15 and crucible 13 are assembled, wherein mould 15 is below crucible 13.Alloying element is arranged in the crucible 13.With heater device for example induction heater 25 be used for heating crucible 13 to being enough to the temperature of fused alloying element.Temperature depends on the composition of alloying element, but can be about 900 ℃.Forehearth can heat by the heat of transmitting from crucible 13.The temperature of forehearth 17 can be about 600 ℃.For example by the end of vacuum pump application in mould 15 promptly exported, be sucked in the forehearth 17 and before entering mould 15, obtain the mode of preheating with the process gas of chamber 11, pressure gradient is put on mould 15.This provides is enough to remain on the preheating preheating of the mould 15 of the temperature that obtains afterwards at least.Supply with mould by means of the inlet by mould and provide gas stream, improved the casting condition of biocompatibility article by mould with the gas that has control and form.The remnant oxygen and the moisture that are captured in the mould can be extruded from mould.For example, crucible can have initial outlet opening with the rod sealing in the bottom.When the alloying element fusion and when reaching desired temperature, can remove rod, and melt is poured onto in the mould 15 of preheating.Method of the present invention causes not having basically the precious metal article of zone of oxidation.An advantage like this is: do not need the processing in acid bath (as adopting in the prior art usually) subsequently.Processing in this type of acid bath is considered to a source of impurity, and these impurity can make the wearer of the precious metal alloys article of the starting material manufacturing of being handled by acid bath cause sensitization.
With reference to Fig. 4, (have in the chamber 11 of process gas atmosphere of predetermined composition in one embodiment of the invention, with alloying element fusion in crucible 13, and biocompatibility precious metal alloys article are cast in mould 15) in, this method may further comprise the steps:
-optional 107, the described mould 15 of preheating before the casting in described mould 15,
-108, in the forehearth 17 that is disposed between mould 15 and the crucible 13 pre-hot inert gas and
-109, make inert gas flows pass through mould 15 by means of extracting rare gas element out from an end of mould 15.
Can be included in periphery (perimeter) tool foraminous right cylinder according to forehearth of the present invention, to enter for the alloying element of fused that will be supplied to mould be in the open through hole so that be derived from the gas of chamber atmosphere.Therefore gas enters forehearth from the side, and is sucked in the mould.
As mentioned above, the casting step comprises the curing of fused alloying element in mould 15.In an embodiment of the inventive method, carry out in the atmosphere by the cooling process gas of predetermined composition in controling environment that solidifies the curing precious metal alloys article that fused alloying element produces as chamber.Cooling can be for example carried out in chamber or mould being exposed under the situation of ambient air entering the adjacent chamber from chamber.
In an embodiment of method of the present invention, the mould that will have solidified precious metal alloys article has less than quenching containing in the alcoholic acid water-bath under 5 ℃ of temperature.
To have oxygen level for less than 5 μ g/g according to precious metal alloys article body made according to the method for the present invention, preferably less than 3 μ g/g be more preferably less than 1 μ g/g.In addition, precious metal alloys article body made according to the method for the present invention has hydrogen richness for less than 0.05 μ g/g, preferably less than 0.01 μ g/g be more preferably less than 0.005 μ g/g.The upper layer of identical precious metal alloys article has oxygen level for less than 30 μ g/g, preferably less than 20 μ g/g and be more preferably less than 10 μ g/g and hydrogen richness for less than 3 μ g/g, preferably less than 2 μ g/g be more preferably less than 1 μ g/g.The oxygen level of precious metal alloys article and hydrogen richness are important for their mechanical properties, if particularly Zhu Zao precious metal alloys article are will be by goldsmith processing with the moulding starting material of jewelry for example.High hydrogen richness may for example provide goldsmith to be not easy the hard and crisp alloy of aftertreatment.This phenomenon is known as hydrogen embrittlement in field of metallurgy.For use in testing for the method for hydrogen richness in the upper layer and oxygen level comprise with the precious metal alloys article be heated near but be lower than the temperature of alloy melting temperature, measure remaining gas then.Under this temperature, have only initial the capture to obtain discharging in the gas on alloy article surface.The body value obtains in a similar manner, but will consequently will capture at first in the gas release of alloy article body by heating alloy article to the temperature far above temperature of fusion.
In one embodiment of the invention, the precious metal alloys article comprise at least 2% Ag.The example of these type of precious metal alloys is 18 carats of gold, 14 carats of gold, Stirling silver etc.
With reference to Fig. 5, the favourable character of precious metal alloys article of the present invention may be damaged by for example goldsmith's unsuitable processing in his aftertreatment, and it has been raw-material jewelry according to the precious metal alloys article of method manufacturing of the present invention for example that described aftertreatment is used for moulding.Therefore, in one embodiment of the invention, it is the special purpose workstation chamber of the method according to this invention aftertreatment precious metal alloys that chamber is set.The preferred the method according to this invention of precious metal alloys is made, but this embodiment is not limited thereto.In one embodiment of the invention, the workstation chamber is a glove box, promptly has the confined chamber of two gloves that extend to this chamber.
Usually the mechanical workout of any kind of that carries out on the precious metal alloys article can be from being benefited indoor the carrying out of workstation.Especially, if the biocompatibility precious metal alloys for example use method of the present invention to come moulding, the character of this alloy can use this workstation to keep.Use routine techniques, the irresistible risk that exists favourable character to be damaged.The example of the mechanical workout that can carry out is cold working, hot-work, soldering, stretching, forging, polishing etc.
In one embodiment of the invention, this method further may further comprise the steps: in the process gas of chamber or special purpose workstation chamber, with preferably according to the soldering of precious metal alloys article and/or the melting welding of method fusion of the present invention and casting.The typical solders that is used for soldering precious metal alloys article of the present invention is precious metal alloys itself.Preferably (promptly have based on every kg process gas having the process gas of predetermined composition less than 0.005kgH
2The water-content of O and less than 5% oxygen level) chamber in, make scolder in the mode identical with precious metal alloys article of the present invention.
The manufacture method of biocompatibility precious metal alloys article also can be used in the manufacturing welding flux alloy.Manufacture method according to scolder of the present invention may further comprise the steps: the process gas of predetermined composition is provided in chamber, and this process gas has based on every kg air less than 0.005kg H
2The water-content of O and oxygen are less than 5% oxygen level; The fusion welding element; With casting fusion welding element with the moulding scolder of rod or piece form for example, wherein fusion and casting step are carried out in chamber.The preferred step that further provides comprises the step of use by the oxygen of the flame chamber of gas containing hydrocarbon supply.For example, gas containing hydrocarbon can be the mixture (being melting welding flame) of oxygen and acetylene, wherein regulates oxygen/acetylene ratio to supply with reducing flame.Combustion processes reduces the oxygen level of chamber.Can use the water-content of dehydration equipment with the restriction process gas.In an execution scheme of the manufacture method of welding flux alloy, chamber comprises the crucible that is disposed on the mould.The scolder element is provided in the crucible.For example the heating by induction heater can be used for fused alloying element, and this alloying element for example is supplied to mould by the opening in crucible bottom subsequently.After melt solidified, welding flux alloy was in die for molding.Randomly, further provide step to comprise the step that shielding gas such as nitrogen, argon gas etc. is supplied to chamber.This shielding gas can be as the means of removing ambient air from chamber, also as the rare gas element during fusion and casting.
Although described the present invention in conjunction with being considered to the most practical at present with the most preferred embodiment, be interpreted as the present invention and be not limited to disclosed embodiment, on the contrary, it is intended to cover the various improvement in the claims and is equal to setting.
Claims (17)
1. the manufacture method of biocompatibility precious metal alloys of making by precious metal alloys, wherein said method comprises (100) step of moulding biocompatibility precious metal alloys article in chamber (11), it is characterized in that, described method comprises that further (101) are at least between described shaping period, the step of the process gas of predetermined composition is provided in described chamber (11), and wherein said process gas has based on every kg process gas less than 0.005kg H
2The water-content of O and less than 5% oxygen level.
2. method according to claim 1, wherein, described forming step comprises that (102) are fused together alloying element for the described precious metal alloys of moulding and the step of the alloying element of fused of the described precious metal alloys of (103) casting.
3. method according to claim 1 and 2, wherein, described forming step comprises (111) described precious metal alloys of aftertreatment in described chamber (11), with the step of the described biocompatibility precious metal alloys of moulding article.
4. according to each described method of claim 1-3, wherein, described provide the step of described process gas to comprise (104) use flame (19) burning that utilizes gas containing hydrocarbon to supply with to be present in the step of the oxygen in the described chamber (11).
5. according to each described method of claim 1-4, wherein, the described step of described process gas that provides comprises the step of using the dry described process gas of dehydration equipment (21).
6. according to each described method of claim 2-5, it comprises that further the step of the gas of finding time and wherein said casting step comprise the step with the described partially filled at least described mould of the alloying element of fused (15) from mould (15).
7. method according to claim 6, it further comprises the step that makes rare gas element (8) flow through described mould (15).
8. method according to claim 7, wherein, described rare gas element (8) comprises the process gas that obtains from described chamber (11).
9. according to claim 7 or 8 described methods, it further may further comprise the steps: the described rare gas element of preheating (8) in forehearth (17), described forehearth (17) are disposed between the crucible (13) and described mould (15) that is used for the described alloying element of fusion.
10. according to each described method of claim 2-9, wherein, described casting step is not included in molded precious metal alloys is exposed under the situation of ambient air, with described molded precious metal alloys refrigerative step in described process gas.
11. according to each described method of claim 3-10, wherein, described post-processing step comprises soldering and/or the described precious metal alloys of melting welding.
12. method according to claim 11 wherein, uses welding flux alloy to carry out described soldering, the welding flux alloy of described welding flux alloy for making in the process gas of described chamber.
13. biocompatibility precious metal alloys article, it is characterized in that, described biocompatibility precious metal alloys article are according to each described method manufacturing in the aforementioned claim, and described biocompatibility precious metal alloys article body has oxygen level for less than 5 μ g/g, preferably less than 3 μ g/g be more preferably less than 1 μ g/g; With hydrogen richness be less than 0.05 μ g/g, preferably less than 0.01 μ g/g be more preferably less than 0.005 μ g/g.
14. biocompatibility precious metal alloys article according to claim 17, wherein, described biocompatibility precious metal alloys article comprise at least 2% Ag.
15. according to claim 13 or 14 described biocompatibility precious metal alloys article, wherein, described biocompatibility precious metal alloys article are the au-alloy greater than 14 carats.
16. according to claim 13 or 14 described biocompatibility precious metal alloys article, wherein, described biocompatibility precious metal alloys are silver alloys.
17. according to each described biocompatibility precious metal alloys article of claim 13-16, wherein, the upper layer of described biocompatibility precious metal alloys article has oxygen level for less than 30 μ g/g, preferably less than 20 μ g/g be more preferably less than 10 μ g/g; And hydrogen richness is less than 3 μ g/g, preferably less than 2 μ g/g be more preferably less than 1 μ g/g.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0800797 | 2008-04-09 | ||
| SE0800798 | 2008-04-09 | ||
| SE0800798-1 | 2008-04-09 | ||
| SE0800797-3 | 2008-04-09 | ||
| PCT/SE2009/050317 WO2009126095A1 (en) | 2008-04-09 | 2009-03-26 | Method of producing precious metal alloy objects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102057067A true CN102057067A (en) | 2011-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980121747XA Pending CN102057067A (en) | 2008-04-09 | 2009-03-26 | Method of producing precious metal alloy objects |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20110030853A1 (en) |
| EP (1) | EP2265737A4 (en) |
| JP (1) | JP2011516734A (en) |
| CN (1) | CN102057067A (en) |
| AU (1) | AU2009234487A1 (en) |
| CA (1) | CA2719536A1 (en) |
| MX (1) | MX2010010972A (en) |
| RU (1) | RU2010145401A (en) |
| WO (1) | WO2009126095A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658566A (en) * | 2013-12-31 | 2014-03-26 | 河南豫光金铅股份有限公司 | Method for producing silver ingot with low oxygen content |
| CN105170948A (en) * | 2015-10-09 | 2015-12-23 | 西安航空动力股份有限公司 | Method for protecting ZG1Cr112Ni3Mo2Co2VN stainless steel casting against oxide spots |
| CN107209477A (en) * | 2015-01-30 | 2017-09-26 | 并木精密宝石株式会社 | The manufacture method of body worn product and the body worn product and the wrist-watch constituted using the body worn product or the manufacture method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ302712B6 (en) * | 2010-02-04 | 2011-09-14 | Afe Cronite Cz S.R.O. | Production technology of bimetallic and multilayer castings cast by gravity and centrifugal casting processes |
| JP5814564B2 (en) * | 2011-02-25 | 2015-11-17 | 安井インターテック株式会社 | Pressure casting method and apparatus |
| CN105170952A (en) * | 2012-05-24 | 2015-12-23 | 安井贸易株式会社 | Pressure casting method and device |
| CN108673037A (en) * | 2018-06-21 | 2018-10-19 | 东莞市松研智达工业设计有限公司 | Press heap formula wax planting mechanism |
| CN108673036A (en) * | 2018-06-21 | 2018-10-19 | 东莞市松研智达工业设计有限公司 | Press heap formula kind wax complete machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US698769A (en) * | 1899-07-17 | 1902-04-29 | Elias H Bottum | Process of preventing oxidation of molten metals. |
| US4580617A (en) * | 1982-05-07 | 1986-04-08 | Charles Blechner | Induction casting machine and method of casting |
| SE8206158L (en) * | 1982-10-29 | 1984-04-30 | Hans G Wahlbeck | PROCEDURE AND DEVICE FOR THE PREPARATION OF ALLERGY FREE Precious Metal Forms |
| JPH01288253A (en) * | 1988-03-11 | 1989-11-20 | Okuda Reiichi | Precision casting machine |
| US5226946A (en) * | 1992-05-29 | 1993-07-13 | Howmet Corporation | Vacuum melting/casting method to reduce inclusions |
| DE29710863U1 (en) * | 1997-06-21 | 1997-08-14 | Schultheiss, Georg, 71292 Friolzheim | Casting device, in particular for high-melting materials |
| US6071326A (en) * | 1998-07-16 | 2000-06-06 | Ecogas Corporation | Process for the production of naphtha gas from landfill gas |
| JP2002053918A (en) * | 2000-08-07 | 2002-02-19 | Tanaka Kikinzoku Kogyo Kk | Noble metal-based amorphous alloy |
| DE10202445C1 (en) * | 2002-01-22 | 2003-04-10 | Heraeus Gmbh W C | Production of silver blanks, for use as tube targets, involves melting silver in an inert or reduction atmosphere together with calcium or aluminum, pouring molten silver in mold and cooling under atmospheric conditions |
| JP2004337908A (en) * | 2003-05-15 | 2004-12-02 | National Institute For Materials Science | Surface modification of noble metal-based non-equilibrium alloys |
| EP1790744A1 (en) * | 2005-11-28 | 2007-05-30 | Siemens Aktiengesellschaft | Method for repairing cracks in components and brazing alloy for brazing of components |
| JP2007215844A (en) * | 2006-02-17 | 2007-08-30 | Shiyoufuu:Kk | Noble metal alloy for dental casting, having property of bonding to ceramic material by baking |
-
2009
- 2009-03-26 EP EP09731318.3A patent/EP2265737A4/en not_active Withdrawn
- 2009-03-26 CN CN200980121747XA patent/CN102057067A/en active Pending
- 2009-03-26 JP JP2011503937A patent/JP2011516734A/en active Pending
- 2009-03-26 AU AU2009234487A patent/AU2009234487A1/en not_active Abandoned
- 2009-03-26 WO PCT/SE2009/050317 patent/WO2009126095A1/en active Application Filing
- 2009-03-26 MX MX2010010972A patent/MX2010010972A/en unknown
- 2009-03-26 RU RU2010145401/02A patent/RU2010145401A/en not_active Application Discontinuation
- 2009-03-26 US US12/936,967 patent/US20110030853A1/en not_active Abandoned
- 2009-03-26 CA CA2719536A patent/CA2719536A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658566A (en) * | 2013-12-31 | 2014-03-26 | 河南豫光金铅股份有限公司 | Method for producing silver ingot with low oxygen content |
| CN107209477A (en) * | 2015-01-30 | 2017-09-26 | 并木精密宝石株式会社 | The manufacture method of body worn product and the body worn product and the wrist-watch constituted using the body worn product or the manufacture method |
| CN107209477B (en) * | 2015-01-30 | 2019-08-09 | 安达满纳米奇精密宝石有限公司 | Body wearing article, method for manufacturing the same, and wristwatch constructed using the same or the method for manufacturing the same |
| CN105170948A (en) * | 2015-10-09 | 2015-12-23 | 西安航空动力股份有限公司 | Method for protecting ZG1Cr112Ni3Mo2Co2VN stainless steel casting against oxide spots |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011516734A (en) | 2011-05-26 |
| EP2265737A1 (en) | 2010-12-29 |
| WO2009126095A1 (en) | 2009-10-15 |
| US20110030853A1 (en) | 2011-02-10 |
| CA2719536A1 (en) | 2009-10-15 |
| EP2265737A4 (en) | 2013-09-25 |
| AU2009234487A1 (en) | 2009-10-15 |
| MX2010010972A (en) | 2010-12-21 |
| RU2010145401A (en) | 2012-05-20 |
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Application publication date: 20110511 |