CN108728693A - A kind of nickel hafnium intermediate alloy and preparation method thereof - Google Patents
A kind of nickel hafnium intermediate alloy and preparation method thereof Download PDFInfo
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- CN108728693A CN108728693A CN201710946871.6A CN201710946871A CN108728693A CN 108728693 A CN108728693 A CN 108728693A CN 201710946871 A CN201710946871 A CN 201710946871A CN 108728693 A CN108728693 A CN 108728693A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
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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
- C22C1/023—Alloys based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
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Abstract
The invention discloses a kind of nickel hafnium intermediate alloys and preparation method thereof, including：Prepare raw material, the raw material includes：The hafnium of 10wt%~50wt% and the nickel of surplus；Raw material cleaning is placed in vacuum drying oven and is dried；The raw material that drying obtains is placed in intermediate frequency furnace and is preheated；After raw material starts to redden, the power of intermediate frequency furnace is adjusted, so that melting sources are at aluminium alloy；After aluminium alloy becomes clearly, the power of intermediate frequency furnace is adjusted, to be refined to aluminium alloy, the impurity and gas in melt is removed, obtains pure aluminium alloy；Finally obtained aluminium alloy is poured into cover half, is cooled to room temperature and can be obtained nickel hafnium intermediate alloy；The weight ratio of nickel and hafnium is controlled in a suitable numberical range by rationally controlling alloying component, can reduce the component segregation in smelting temperature and process of setting by the present invention, be suitable for metal material field.
Description
Technical field
The invention belongs to the technical fields of metal material more particularly to a kind of nickel hafnium intermediate alloy and preparation method thereof.
Background technology
Nickel base superalloy is due to higher elevated temperature strength, good high-temperature oxidation resistant and corrosion resistance, good
Fatigue behaviour and the comprehensive performances such as fracture toughness, be widely used for manufacturing aero-jet engine, various industrial combustion gas wheels
Machine most hot-end component.
The nickel-base cast superalloy being widely used at present, 760 DEG C of generally existing nearby the plasticity of (650 DEG C -850 DEG C) and
The all relatively low problem of intensity, this just frequently results in alloyed components the drawbacks of can destroy suddenly in II latter stage in stage of creep.Add hafnium
It is one of the effective way for improving nickel-base casting alloy medium temperature intensity and plasticity.But the fusing point of metallic nickel is 1455 DEG C, density
For 8.9g/cm3, and the fusing point of metal hafnium is 2227 DEG C, density 13.31g/cm3, the fusing point and density of the two all have centainly
Difference.Therefore in the fusion process of nickel base superalloy, if hafnium element is added directly in the form of simple metal, it will cause
The component segregation of alloy pig is serious, influences the quality and performance of alloy, and when alloy pig size is larger, component segregation can be more
Seriously.
Invention content
The present invention overcomes the shortcomings of the prior art, technical problem to be solved to be：Offer one kind can make Ni-based
High temperature alloy effectively reduces nickel hafnium intermediate alloy of component segregation and preparation method thereof in melting.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of preparation side of nickel hafnium intermediate alloy
Method, including：S101, prepare raw material, the raw material includes：The hafnium of 10wt%~50wt% and the nickel of surplus；It is S102, raw material is clear
It washes to be placed in vacuum drying oven and be dried；S103, it the obtained raw material of drying is placed in intermediate frequency furnace preheats；
S104, after raw material starts to redden, the power of intermediate frequency furnace is adjusted, so that melting sources are at aluminium alloy；S105, work as aluminium alloy
After becoming clear, the power of intermediate frequency furnace is adjusted, to be refined to aluminium alloy；S106, finally obtained aluminium alloy is poured into
Cover half is cooled to room temperature and can be obtained nickel hafnium intermediate alloy.
Preferably, the weight ratio of hafnium is 20wt%~35wt% in the raw material.
Preferably, described raw material cleaning is placed in vacuum drying oven is dried, and is specifically included：S1021, by raw material into
Row ultrasonic cleaning；S1022, the raw material after cleaning is placed in vacuum drying oven, vacuum drying oven is warming up to 80 DEG C, is then protected again
Temperature 8 hours.
Preferably, the raw material that drying is obtained, which is placed in intermediate frequency furnace, preheats, and specifically includes：S1031, general
Obtained raw material is dried to be placed in the crucible of intermediate frequency furnace；S1032, it after intermediate frequency furnace is evacuated to 5Pa or less, opens
Control power supply；S1033, by the power regulation of intermediate frequency furnace to 10~20kW, keep 5~10min.
Preferably, described after raw material starts to redden, the power of intermediate frequency furnace is adjusted, so that melting sources are at alloy
Liquid specifically includes：S1041, after the raw material in crucible starts to redden, by the power regulation of intermediate frequency furnace to 35~45kW；
S1042, after raw material starts fusing, adjust the power of intermediate frequency furnace, it made to stablize in 50~65kW, until raw material is all molten
Change, aluminium alloy brightens.
Preferably, described to adjust the power of intermediate frequency furnace after aluminium alloy becomes clear, to be refined to aluminium alloy, tool
Body includes：After aluminium alloy becomes clearly, by the power regulation of intermediate frequency furnace to 70kW, the impurity in solution is set fully to float up to molten
Pool surface obtains pure aluminium alloy.
Correspondingly, a kind of nickel hafnium intermediate alloy provided by the invention, is mainly prepared by above-mentioned preparation method.
The present invention has the advantages that compared with prior art：The present invention passes through when preparing nickel hafnium intermediate alloy
Rationally control alloying component controls the weight ratio of nickel and hafnium in a suitable numberical range, can reduce smelting temperature with
And the component segregation in process of setting.
Description of the drawings
The present invention will be further described in detail below in conjunction with the accompanying drawings；
Fig. 1 is a kind of flow diagram of the preparation method for nickel hafnium intermediate alloy that the embodiment of the present invention one provides；
Fig. 2 is a kind of flow diagram of the preparation method of nickel hafnium intermediate alloy provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of flow diagram of the preparation method for nickel hafnium intermediate alloy that the embodiment of the present invention three provides；
Fig. 4 is a kind of flow diagram of the preparation method for nickel hafnium intermediate alloy that the embodiment of the present invention four provides.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments；Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without creative efforts, shall fall within the protection scope of the present invention.
The present invention provides a kind of preparation method of nickel hafnium intermediate alloy, Fig. 1 is the flow diagram of embodiment one, is such as schemed
Shown in 1, the preparation method of the nickel hafnium intermediate alloy may include：
S101, prepare raw material, the raw material includes：The hafnium of 10wt%~50wt% and the nickel of surplus.
S102, raw material cleaning is placed in vacuum drying oven and is dried.
S103, it the obtained raw material of drying is placed in intermediate frequency furnace preheats.
S104, after raw material starts to redden, the power of intermediate frequency furnace is adjusted, so that melting sources are at aluminium alloy.
S105, after aluminium alloy becomes clear, the power of intermediate frequency furnace is adjusted, to be refined to aluminium alloy.
S106, finally obtained aluminium alloy is poured into cover half, is cooled to room temperature and can be obtained nickel hafnium intermediate alloy.
In the specific implementation, raw material clean is to remove the dust and greasy dirt of metal surface.Raw material is held to open
Beginning reddens, aluminium alloy becomes clear opportunity, is observed by the observation window on intermediate frequency furnace.The raw material of drying is placed in
When being reacted in intermediate frequency furnace, raw metal should be made to be come into full contact with as possible in stove, ensure that intermediate frequency furnace can incude
Heating fusing.In addition, should check whether furnace body, cooling system, electric system, turndown machinery etc. are normal before blow-on, if any different
It should often solve in time, it can blow-on after normal.
Further, the weight ratio of hafnium can be 20wt%~35wt% in the raw material.
Further, the weight ratio of hafnium can be 30wt% in the raw material.
Fig. 2 is the flow diagram of embodiment two, as shown in Fig. 2, on the basis of embodiment one, it is described to clean raw material
It is placed in vacuum drying oven and is dried, specifically be may include：
S1021, raw material is subjected to ultrasonic cleaning.
S1022, the raw material after cleaning is placed in vacuum drying oven, vacuum drying oven is warming up to 80 DEG C, it is small then to keep the temperature 8 again
When.
Fig. 3 is the flow diagram of embodiment three, as shown in figure 3, on the basis of embodiment one, it is described to obtain drying
Raw material be placed in intermediate frequency furnace and preheated, specifically may include：
S1031, the raw material that drying obtains is placed in the crucible of intermediate frequency furnace.
S1032, after intermediate frequency furnace is evacuated to 5Pa or less, control power supply is opened.
S1033, by the power regulation of intermediate frequency furnace to 10~20kW, keep 5~10min.
Fig. 4 is the flow diagram of example IV, as shown in figure 4, on the basis of embodiment one, it is described when raw material starts
After reddening, the power of intermediate frequency furnace is adjusted, so that melting sources specifically may include at aluminium alloy：
S1041, after the raw material in crucible starts to redden, by the power regulation of intermediate frequency furnace to 35~45kW；
S1042, after raw material starts fusing, adjust the power of intermediate frequency furnace, it made to stablize in 50~65kW, until former
All fusing, aluminium alloy brighten material.
Further, described to adjust the power of intermediate frequency furnace after aluminium alloy becomes clear, to be refined to aluminium alloy,
Specifically it may include：After aluminium alloy becomes clearly, by the power regulation of intermediate frequency furnace to 70kW, the impurity in solution is made fully to float
To weld pool surface pure aluminium alloy is obtained to remove the impurity and gas in melt.
The present invention also provides a kind of nickel hafnium intermediate alloy, the nickel hafnium intermediate alloy is mainly by above-mentioned preparation method system
It is standby to form.
The present invention is when preparing nickel hafnium intermediate alloy, by rationally controlling alloying component, i.e., by the weight ratio control of nickel and hafnium
System can reduce the component segregation in smelting temperature and process of setting in a suitable numberical range.Below more with one
The embodiment of body illustrates the present invention：
Metallic nickel 42kg and metal hafnium 18kg that purity is 99.95% or more are subjected to ultrasonic cleaning.
Then the metal after cleaning is placed in vacuum drying oven and is dried, 80 DEG C of drying temperature, drying time 8h.
The raw material that drying obtains is placed in the crucible of intermediate frequency furnace.
Intermediate frequency furnace is evacuated to 5Pa hereinafter, start power be 10~20kW preheat, the retention time be 5~
10min。
After material starts slowly to redden, by algorithm for power modulation to 35~45kW.
It observes that material gradually after fusing, by power stability to 50~65kW, observes whether metalliferous material all melts, closes
Whether golden liquid brightens.
Aluminium alloy properly increases power to 70~80kW after becoming clear, is refined to it, keeps the impurity in melt abundant
Weld pool surface is floated up to, to remove the impurity and gas in melt, obtains pure aluminium alloy.
Aluminium alloy is finally poured into cover half, bell is opened after 2 hours cooling, presss from both sides out mold, obtain nickel hafnium intermediate alloy.
It is sampled in ingot casting upper and lower parts and carries out Chemical bath deposition, analysis result is as shown in table 1.
1 ingot casting upper and lower parts analysis result of table
| Alloying component | Hf (wt.%) | Fe (wt%) | C (wt%) | O (wt%) | N (wt%) | Ni (wt%) |
| Ingot casting top | 30.1 | 0.068 | 0.0078 | 0.018 | 0.006 | Surplus |
| Ingot casting lower part | 30.3 | 0.062 | 0.0081 | 0.011 | 0.0056 | Surplus |
From above-mentioned analysis result can be seen that it is produced according to the present invention made of ingot casting, chemical composition is uniform.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiment.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (7)
1. a kind of preparation method of nickel hafnium intermediate alloy, it is characterised in that：Including：
S101, prepare raw material, the raw material includes：The hafnium of 10wt%~50wt% and the nickel of surplus；
S102, raw material cleaning is placed in vacuum drying oven and is dried；
S103, it the obtained raw material of drying is placed in intermediate frequency furnace preheats；
S104, after raw material starts to redden, the power of intermediate frequency furnace is adjusted, so that melting sources are at aluminium alloy；
S105, after aluminium alloy becomes clear, the power of intermediate frequency furnace is adjusted, to be refined to aluminium alloy；
S106, finally obtained aluminium alloy is poured into cover half, is cooled to room temperature and can be obtained nickel hafnium intermediate alloy.
2. a kind of preparation method of nickel hafnium intermediate alloy according to claim 1, it is characterised in that：Hafnium in the raw material
Weight ratio is 20wt%~35wt%.
3. a kind of preparation method of nickel hafnium intermediate alloy according to claim 1, it is characterised in that：It is described to clean raw material
It is placed in vacuum drying oven and is dried, specifically included：
S1021, raw material is subjected to ultrasonic cleaning；
S1022, the raw material after cleaning is placed in vacuum drying oven, vacuum drying oven is warming up to 80 DEG C, then keeps the temperature 8 hours again.
4. a kind of preparation method of nickel hafnium intermediate alloy according to claim 1, it is characterised in that：It is described to obtain drying
Raw material be placed in intermediate frequency furnace and preheated, specifically include：
S1031, the raw material that drying obtains is placed in the crucible of intermediate frequency furnace；
S1032, after intermediate frequency furnace is evacuated to 5Pa or less, control power supply is opened；
S1033, by the power regulation of intermediate frequency furnace to 10~20kW, keep 5~10min.
5. a kind of preparation method of nickel hafnium intermediate alloy according to claim 1, it is characterised in that：It is described when raw material starts
After reddening, the power of intermediate frequency furnace is adjusted, so that melting sources are specifically included at aluminium alloy：
S1041, after the raw material in crucible starts to redden, by the power regulation of intermediate frequency furnace to 35~45kW；
S1042, after raw material starts fusing, adjust the power of intermediate frequency furnace, it made to stablize in 50~65kW, until raw material is complete
Portion's fusing, aluminium alloy brighten.
6. a kind of preparation method of nickel hafnium intermediate alloy according to claim 1, it is characterised in that：The aluminium alloy of working as becomes
After clear, the power of intermediate frequency furnace is adjusted, to be refined to aluminium alloy, is specifically included：After aluminium alloy becomes clearly, by intermediate frequency sense
It answers the power regulation of stove to 70kW, the impurity in solution is made fully to float up to weld pool surface, obtain pure aluminium alloy.
7. a kind of nickel hafnium intermediate alloy, it is characterised in that：The nickel hafnium intermediate alloy is mainly by any institute in claim 1~6
The preparation method stated is prepared.
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| CN201710946871.6A CN108728693A (en) | 2017-10-12 | 2017-10-12 | A kind of nickel hafnium intermediate alloy and preparation method thereof |
| CN202011056760.6A CN112442615A (en) | 2017-10-12 | 2017-10-12 | Nickel-hafnium intermediate alloy and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110029260A (en) * | 2019-05-15 | 2019-07-19 | 全南晶环科技有限责任公司 | A kind of nickel hafnium alloy and preparation method thereof |
| CN112239817A (en) * | 2020-10-30 | 2021-01-19 | 南京佑天金属科技有限公司 | Preparation system and preparation method of nickel-hafnium intermediate alloy |
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| CN110029260A (en) * | 2019-05-15 | 2019-07-19 | 全南晶环科技有限责任公司 | A kind of nickel hafnium alloy and preparation method thereof |
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| CN112239817A (en) * | 2020-10-30 | 2021-01-19 | 南京佑天金属科技有限公司 | Preparation system and preparation method of nickel-hafnium intermediate alloy |
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Application publication date: 20181102 |