CN109811155A - A kind of copper base high temperature alloy utilizes electromagnetic induction fast melting technique - Google Patents
A kind of copper base high temperature alloy utilizes electromagnetic induction fast melting technique Download PDFInfo
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- CN109811155A CN109811155A CN201711161055.0A CN201711161055A CN109811155A CN 109811155 A CN109811155 A CN 109811155A CN 201711161055 A CN201711161055 A CN 201711161055A CN 109811155 A CN109811155 A CN 109811155A
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Abstract
The present invention relates to a kind of copper base high temperature alloys to utilize electromagnetic induction fast melting technique, belongs to Alloy melting technology field.It will successively arrange from top to bottom in crucible in raw material needed for melting with the lower element lithium of sulphur affinity, hafnium, lead, vanadium, manganese in order first, carry out superhigh temperature refining desulfuration after heating fusing；Refining finishing control melt sequentially adds strong nitride forming element mercury, carbon, aluminium after being reduced to suitable temperature, is melted, is refined again；Easy scaling loss and volatile microelement C, B, Zr is added when finally control melt is reduced to certain temperature, is stirred simultaneously, is poured after completion is clear again up to aluminium alloy, alloy melting is completed.The present invention has highly significant and excellent desulfurization effect, compared with existing method of smelting, using the copper base high temperature alloy of melting of the present invention, sulfur content can be reduced to 6ppm hereinafter, being suitable for the industrialization melting of the copper base high temperature alloy master alloy more demanding to sulfur content.
Description
Technical field
The present invention relates to a kind of copper base high temperature alloys to utilize electromagnetic induction fast melting technique, which is suitable for containing sulphur
The industrialization for measuring the copper base high temperature alloy master alloy having higher requirements is smelted, and Alloy melting technology field is belonged to.
Background technique
Copper base high temperature alloy is a kind of multicomponent alloy that ingredient is extremely complex, generally all forms member containing strong nitride
Element, such as mercury, carbon, aluminium；In addition, vanadium as a kind of essential alloy element, contains a large amount of sulphur, institute in raw material
With during above-mentioned constituent content higher alloy melting, sulphur is unable to get is effectively removed always.When copper base high temperature alloy
Sulfur content it is higher when, it is easy to form nitride, when these nitride inclusion quantity are excessive, will be on active service in alloy
Formation of crack is formed in journey, further becomes the channel of crackle generation and expansion, so that low-alloyed fatigue and croop property drop, because
This, it is necessary to the content of element sulphur in strict control alloy.
Vacuum induction melting is that one kind heats using electromagnetic inductive heating principle under vacuum conditions and melt metal
Smelting technology.The high-quality high temperature alloy almost all of high-alloying uses vacuum induction melting method molten alloy.With high temperature alloy
Continuous development, in alloy gas content and inclusion content be proposed increasingly higher demands.Currently, foreign countries are more
Sulfur content in alloy can be dropped to 10ppm hereinafter, however domestic equally using vacuum induction by mature vacuum induction melting
Melting, but because of cloth, charging sequence, the reasons such as smelting technology is unreasonable lead in melted out alloy sulfur content often
Up to 30ppm, there are obvious gaps with foreign countries, to constrain the practical application and further development of China's high temperature alloy.Cause
This, in order to improve desulfurization effect of copper base high temperature alloy during vacuum induction melting, so that the sulphur in alloy be effectively reduced
Content develops advanced reasonable cloth, feed way, and corresponding vacuum induction melting and refinery practice with extremely important
Meaning.
Summary of the invention
It is an object of the present invention to overcome the above deficiencies, and it is quick using electromagnetic induction to provide a kind of copper base high temperature alloy
Smelting technology.
According to technical solution provided by the invention, a kind of copper base high temperature alloy utilizes electromagnetic induction fast melting technique, step
It is rapid as follows:
(1) melting once and refining: by melting copper based high-temperature alloy raw material with the lower element lithium of sulphur affinity,
Hafnium, lead, vanadium, manganese carry out first time melting and refining together, sulfur content are reduced, in furnace sampling and measuring melt in refining process
Sulfur content, after sulfur content reaches target call terminate for the first time refine；
(2) secondary smelting and refining: after initial refining, stop power transmission up to aluminium alloy surface conjunctiva and solidify
Afterwards, strong nitride forming element mercury, carbon, aluminium are sequentially added, power transmission heating carries out second after added material is completely melt
Refining terminates second with the sulfur content in furnace sampling and measuring melt in refining process after sulfur content reaches target call
Refining；
(3) alloy melting: after double refining, after stopping power transmission to aluminium alloy surface conjunctiva, to vaccum sensitive stove furnace
Easy scaling loss and volatile microelement 0.02%-0.08%C, 0.002%-0.006% is added to 1-1.2KPa in chamber applying argon gas
B, 0.015%-0.05%Zr is stirred simultaneously, and up to aluminium alloy, completion is poured clearly afterwards again, completes alloy melting.
Before melting once be packed into crucible in five kinds of raw metals be with the lower lithium of sulphur affinity, hafnium, lead, vanadium and manganese,
Its arrange and additional amount are as follows: in terms of copper base high temperature alloy raw material quality, be added 20%-40% lithium, 100% hafnium, 100% lead,
100% vanadium, 100% manganese, 60%-80% lithium.
Melting once process uses staged heating method, specific steps in step (1) are as follows:
(1) primary heating: when vacuum degree reaches 20Pa in furnace, start to heat exclusion attachment with 45-55kW power power transmission
Gas, when vacuum degree reaches 5Pa, adjusting power to 190-210kW keeps 35-45mi sulphur, then increases power to 290-310kW,
Continue to increase power to 390-410kW after keeping 35-45mi sulphur, lithium BOB(beginning of block) melts at this time；
(2) secondary temperature elevation: continue to increase power to 490-510kW, hafnium item, leads, vanadium block, manganese block successively melt, to institute
There is raw metal all to melt into molten metal liquid, continues to increase power to 550-570kW, quickly melt is made to be warming up to 1560
Power is adjusted after DEG C makes melt temperature maintain 1560 DEG C, keeps the temperature 15-20mi sulphur；
(3) it refines: when vacuum degree reaches 5 × 10-2When Pa, initial refining, adjustment melt temperature to 1630-1650 are carried out
DEG C, 30-40mi sulphur is kept the temperature, stops power transmission and waits for melt conjunctiva and solidify.
Three kinds of raw metals being added after initial refining in step (2) be strong nitride forming element mercury, carbon,
Aluminium, addition sequence and additional amount are as follows: 100% mercury, 100% carbon, 100% aluminium.
Step (2) secondary smelting vacuumizes after starting, and when vacuum degree reaches 1Pa in furnace, starts with 190-210kW power
Power transmission heating excludes attachment gas, when vacuum degree reaches 1 × 10-1When Pa, the disposable power that increases is to 490-510kW holding 4-
Alloy starts to melt after 6mi sulphur, continues the raw metal being added after keeping 4-6mi sulphur to make and all melts completely into melt；Adjustment
Power carries out second and refines, keep melt temperature at 1420-1440 DEG C, keep the temperature 14-16mi sulphur, make simultaneously to 90-110kW
Electromagnetic agitation, stirring frequency 300-340Hz, power of agitator 240-260kW are carried out with independent current source.
When whole microelement C, B, Zr are added in 1400-1420 DEG C of leaf in melt temperature, and need to be filled with into furnace before being added
Argon gas protection, it is clear in 1400-1420 DEG C of heat preservationization after addition, while electromagnetic agitation, stirring frequency are carried out using independent current source
Rate 300-340Hz, power of agitator 240-260kW.
Beneficial effects of the present invention:
(1) the higher element of sulfur content itself and non-strong nitride forming element are added when first time melting, passes through superelevation
Temperature refining, while making melt significantly desulfurization in high vacuum conditions；
(2) after first time melting, continue cooling after melt conjunctiva until melt solidifies completely, during this period with
The sulphur in alloy can be further discharged in the reduction of solid solubility after alloy melt solubility and alloy graining；
(3) second of refining uses lower refining temperature, and melt can be effectively reduced and react with crucible, avoid band
Enter the field trash in crucible；
(4) it is filtered using ceramic filter screen, reduces the sulfur content and field trash in alloy to greatest extent；
(5) using cloth of the present invention, charging process and smelting technology, the sulfur content in alloy can be made to be reduced to 6ppm.
Specific embodiment
Below with reference to embodiment, the present invention will be described in further detail.
Embodiment:
A kind of copper base high temperature alloy utilizes electromagnetic induction fast melting technique, the chemical component (matter of the copper base high temperature alloy
Measure score) are as follows: 0.6% aluminium, 16% vanadium, 2.8% lead, 5.5% hafnium+mercury, 0.9% carbon, 15% manganese, 0.08%C, 0.002%B,
0.015%Zr, surplus are lithium, single furnace melting 2000kg alloy.
Specific step is as follows:
1, raw material prepare: polishing off the oxide on required copper base high temperature alloy raw material surface and the sundries of attachment, put
Enter alcohol or acetone soln and utilize ultrasonic cleaning, the baking of 60-80 DEG C of baking oven progress 8h-10h is put into after cleaning
It is dry.
2, the arrangement of furnace charge: the cloth in crucible in particular order is needed before melting, sequentially adds 1/3 or so lithium
Block, whole hafnium items, leads, vanadium block, manganese block, the lithium block of residue 2/3.
3, first time melting: carrying out melting using vaccum sensitive stove, when vacuum degree reaches 20Pa in furnace, starts with 50kW
The heating of power power transmission excludes attachment gas, and when vacuum degree reaches 5Pa, adjusting power to 200kW keeps 40mi sulphur, then increases power
Continue to increase power after keeping 40mi sulphur to 300kW to 400kW, lithium BOB(beginning of block) melts at this time.Further increase power extremely
500kW, hafnium item, leads, vanadium block, manganese block are successively melted, are all melted to all raw metals into molten metal liquid, continue to add
It is high-power to adjust power to 560kW, after so that melt is warming up to 1560 DEG C melt temperature is made to maintain 1560 DEG C, keep the temperature 18mi
Sulphur.
4, it refines for the first time: after melt is kept the temperature, melt temperature being heated to 560kW power transmission and reaches 1640 DEG C, at this time
Vacuum degree reaches to 5 × 10-2Pa refines 35mi sulphur.With furnace sample detection melt sulfur content.
5, second of melting: if sulfur content meets target value, stop power transmission up to bath surface conjunctiva and solidify completely
Afterwards, whole mercury blocks, carbon block, aluminium block are sequentially added, when vacuum degree reaches 1Pa in furnace, is started with the heating of 200kW power power transmission
Attachment gas is excluded, when vacuum degree reaches 1 × 10-1When Pa, disposable increasing power to 500kW keeps alloy after 5mi sulphur to start
Fusing continues the raw metal being added after keeping 5mi sulphur to make and all melts completely into melt.
6, it refines for second: with the heating of 100kW power transmission after second of melting, keeping melt temperature at 1430 DEG C, essence
15mi sulphur is refined, while being stirred using independent current source, power of agitator 250kW, frequency 320Hz.With furnace sample detection melt sulfur content.
7, preparation before casting: stopping power transmission after melt conjunctiva, argon gas is passed through into furnace to 1-1.2KPa, 1400 DEG C-
1420 DEG C are added whole microelement C, B, Zr, adjustment power to 120kW, while microelement is all melted into melt,
It is stirred using independent current source, power of agitator 250kW, frequency 320Hz, keeps 5mi sulphur, so that melt temperature is stablized at 1670 DEG C
When, it is poured.
Claims (1)
1. a kind of copper base high temperature alloy utilize electromagnetic induction fast melting technique, it is characterized in that steps are as follows: (1) melting once and
Refining: first will be carried out together with the lower element lithium of sulphur affinity, hafnium, lead, vanadium, manganese in melting copper based high-temperature alloy raw material
Secondary melting and refining reduce sulfur content, with the sulfur content in furnace sampling and measuring melt in refining process, when sulfur content reaches mesh
Mark terminates to refine for the first time after requiring；(2) secondary smelting and refining: after initial refining, stop power transmission until aluminium alloy table
After face conjunctiva and solidification, strong nitride forming element mercury, carbon, aluminium are sequentially added, power transmission heating is until added material is completely molten
After change, carries out second and refine, with the sulfur content in furnace sampling and measuring melt in refining process, wanted when sulfur content reaches target
Terminate to refine for second after asking；(3) alloy melting: after double refining, after stopping power transmission to aluminium alloy surface conjunctiva, to true
Empty induction furnace furnace chamber applying argon gas to 1-1.2kPa, be added easy scaling loss and volatile microelement 0.02%-0.08%C,
0.002%-0.006%B, 0.015%-0.05%Zr are stirred simultaneously, and up to aluminium alloy, completion is poured clearly afterwards again,
Complete alloy melting.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112143934A (en) * | 2020-09-18 | 2020-12-29 | 安徽楚江科技新材料股份有限公司 | Method for reducing oxidation burning loss of copper-boron-copper-manganese alloy during coinage copper smelting |
| CN114293261A (en) * | 2021-12-28 | 2022-04-08 | 江苏隆达超合金航材有限公司 | Vacuum induction melting process for ultra-pure DD419 single crystal high-temperature alloy master alloy |
| CN116770121A (en) * | 2023-06-19 | 2023-09-19 | 基迈克材料科技（苏州）有限公司 | Method for introducing trace sulfur element into smelting process material |
-
2017
- 2017-11-20 CN CN201711161055.0A patent/CN109811155A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112143934A (en) * | 2020-09-18 | 2020-12-29 | 安徽楚江科技新材料股份有限公司 | Method for reducing oxidation burning loss of copper-boron-copper-manganese alloy during coinage copper smelting |
| CN114293261A (en) * | 2021-12-28 | 2022-04-08 | 江苏隆达超合金航材有限公司 | Vacuum induction melting process for ultra-pure DD419 single crystal high-temperature alloy master alloy |
| CN114293261B (en) * | 2021-12-28 | 2023-05-12 | 江苏隆达超合金航材有限公司 | Vacuum induction smelting process for ultra-high purity DD419 single crystal superalloy master alloy |
| CN116770121A (en) * | 2023-06-19 | 2023-09-19 | 基迈克材料科技（苏州）有限公司 | Method for introducing trace sulfur element into smelting process material |
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