CN109536749A - A kind of preparation method and its high temperature alloy of high temperature alloy - Google Patents
A kind of preparation method and its high temperature alloy of high temperature alloy Download PDFInfo
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- CN109536749A CN109536749A CN201811421580.6A CN201811421580A CN109536749A CN 109536749 A CN109536749 A CN 109536749A CN 201811421580 A CN201811421580 A CN 201811421580A CN 109536749 A CN109536749 A CN 109536749A
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
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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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- Continuous Casting (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of preparation method of high temperature alloy and the high temperature alloys.The preparation method of the high temperature alloy includes continuous casting process, and the continuous casting process carries out under vacuum and the following steps are included: (1) controls the degree of superheat of molten steel to 20-100 DEG C；(2) continuous casting Blank drawing machine is made to pull dummy bar period reciprocating horizontal motion in a manner of pull-stop-push-drawing, by wire velocity control at 0.5-1.5 ms/min, until casting blank surface temperature is stablized；(3) being gradually increased drawing speed is 2-4 ms/min, carries out continuous casting work and is filled with the argon gas of 0.09-0.05Mpa into continuous casting production during continuous casting work.Using the preparation method of high temperature alloy of the invention, it is able to produce out the high temperature alloy base material product of low-cost high-quality.
Description
Technical field
The present invention relates to high temperature alloy manufacturing field, it particularly relates to the preparation method of a kind of high temperature alloy and its should
High temperature alloy product.
Background technique
High temperature alloy is the critical material for manufacturing Aeronautics and Astronautics, automobile, the fields hot-end component such as petrochemical industry, on international market
The high-temperature alloy material consumed every year is up to 300,000 tons, and the year output of the current high temperature alloy in China is only 10,000 tons, can not
Meet the market demand.In addition, high-temperature alloy material the gas content, degree of purity, macrocavity etc. of alloy are all had it is stringent
It is required that.With the raising of aerospace engine performance, the development and application pair of the novel high-temperature alloys such as powder, orientation, monocrystalline
The quality of high-temperature alloy material proposes increasingly higher demands.The master alloy of high temperature alloy is all high-temperature alloy parts
Material source, the height of quality directly affect the qualified casting of final casting and are reliably on active service.
The technique of production high temperature alloy master alloy is the molding of vacuum metal die cast at present.The technique can be obtained into
Divide the master alloy of accurate high temperature alloy, but there are still following several respects problems: (1) master alloy stick being poured using direct casting mode
Material, inevitably by crucible material, pour nonmetallic materials in chute and dross brings ingot casting into, can not control well
The inclusion content of master alloy influences the yield rate of cast superalloy casting and the quality of powder metallurgy superalloy product；(2)
The internal soundness for the electrode bar produced is poor, and there are apparent shrinkage cavity defects, influences arc stability when electroslag remelting, with
And electrode rotary dynamic balancing and PREP powder technology stability, it is final to influence wrought superalloy and powder metallurgy superalloy
The quality of product；(3) lumber recovery is low, preparation cost is high, there is casting concentrating shrinkage cavity at the top of casting rod, internal enriched dross,
Riser must be cut off；(4) surface quality of master alloy bar is poor, needs to polish and even processes the processing that strips off the skin, final mother is caused to close
The lumber recovery of gold only has 80% or so, causes a large amount of wasting of resources.
Continuous casting technology has many advantages, such as that high production efficiency, at low cost, slab quality is high, in straight carbon steel and special steel
And leading position is occupied in the production of non-ferrous alloy.And high temperature alloy is since material cost is high, the requirement to quality is stringent,
Therefore application of the continuous casting technology in high temperature alloy field has especially important meaning, is to produce inexpensive, high-quality high temperature to close
The best-of-breed technology approach of golden base material product.But due to containing the active elements such as Al, Ti, the melting of alloy in high temperature alloy
It must be carried out under vacuum conditions with continuous casting, therefore, vacuum level continuous casting technology is developed in an urgent demand.
A kind of vacuum continuous casting apparatus for high-temperature alloy is disclosed in patent document CN102179493A, it can using the device
Realize the vacuum melting of high temperature alloy and the continuous casting forming of vacuum level, it is still, molten for what is carried out under this vacuum environment
For refining and horizontal casting, if the quality of high temperature alloy will greatly be influenced by directlying adopt existing preparation process.Cause
This, needs to develop a kind of novel high-temperature alloy preparation method for being adapted to vacuum continuous casting forming.
Summary of the invention
One or more of to solve the above-mentioned problems, the present invention provides a kind of preparation method of high temperature alloy, described
The preparation method of high temperature alloy includes continuous casting process, and the continuous casting process carries out under vacuum and the following steps are included: (1) is controlled
The degree of superheat of molten steel processed is to 20-100 DEG C；(2) continuous casting Blank drawing machine is made to pull dummy bar period in a manner of pull-stop-push-drawing past
Multiple horizontal movement, by wire velocity control at 0.5-1.5 ms/min, until casting blank surface temperature is stablized；(3) it is gradually increased throwing
Speed is 2-4 ms/min, carries out continuous casting work and is filled with 0.09- into continuous casting production during continuous casting work
The argon gas of 0.05Mpa.
Wherein, in the continuous casting process, after being filled with the argon gas, fluctuations of vacuum value≤0.002MPa is controlled.
Wherein, the continuous casting process is shaped using uphill casting formula continuously casting.
Wherein, the smelting technology before the preparation method of the high temperature alloy further includes continuous casting process, the smelting technology
It carries out under vacuum, in smelting technology, refining temperature is 1500~1600 DEG C, and vacuum degree is less than 3Pa.
Wherein, the smelting technology carries out in vacuum level continuous casting medium frequency induction melting furnace.
Wherein, in the smelting technology, refining time is 0.5~2 hour.
The present invention also provides high temperature alloys made of prepared by a kind of preparation method using above-mentioned high temperature alloy.
Wherein, the content total of Al, Ti, Hf and Zr element in the high temperature alloy can be 0~12 mass %.
Wherein, the content of Al, Ti, Hf and Zr element in the high temperature alloy adds up to 5~12 mass %.
Wherein, the high temperature alloy can be K418 alloy, K417 alloy, GH4169 alloy, FGH4095 alloy,
FGH4097 alloy, JG4246A alloy, any one in DZ125 alloy.
The preparation method of high temperature alloy disclosed by the invention is able to produce out the high temperature alloy of low-cost high-quality
Base material product.
Specific embodiment
The preparation method of high temperature alloy provided by the invention includes the continuous casting process carried out under vacuum.Continuous casting process packet
It includes following steps: (1) controlling the degree of superheat of molten steel to 20-100 DEG C；(2) make continuous casting Blank drawing machine pull dummy bar with draw-stop-
The mode period reciprocating horizontal motion of push-pull, by wire velocity control at 0.5-1.5 ms/min, until casting blank surface temperature is steady
It is fixed；(3) being gradually increased drawing speed is 2-4 ms/min, continuous casting work is carried out, during continuous casting work, among continuous casting
The argon gas of 0.09-0.05Mpa is filled in packet.
Wherein, in step (1), it can guarantee that molten steel can be from intermediate packet stream to knot using 20-100 DEG C of the degree of superheat
Brilliant device reduces the degree of superheat to the greatest extent, while completing dynamically to fill type and dynamic feeding to reduce the heat transfer load of crystallizer.In step
In (2), continuous casting Blank drawing machine is used to pull dummy bar period reciprocating horizontal motion in a manner of pull-stop-push-drawing that can obtain suddenly
Ideal slab solidified shell thickness guarantees that continuous casting work can continue to carry out.In step (3), control drawing speed can be very big
The productivity of ground raising continuous casting.But it will be apparent to a skilled person that above-mentioned steps are to mention as a whole
For a kind of process suitable for vacuum continuous casting.
In addition, continuous casting process of the invention is different from mean level continuous casting, the crystallizer of vacuum level continuous casting is integrally placed at
In vacuum, metal entirely to fill type and process of setting all be to carry out under vacuum conditions.In continuous casting process, it is filled with the argon
After gas, fluctuations of vacuum value≤0.002MPa is controlled.The matter of high temperature alloy is directly affected by the argon gas being filled in continuous casting process
Amount, in the case where being filled with the argon gas of 0.09-0.05Mpa during continuous casting work of the invention into continuous casting production, passes through
By the control of fluctuations of vacuum value within 0.002MPa, it can further ensure that the high temperature alloy quality of acquisition is stablized.
In addition, in continuous casting process, it is preferred to use uphill casting formula continuously casting forming.Due to being different from existing metal mould casting
Forming technology, vacuum continuous casting process of the invention fill type using uphill casting, so the various field trashes that specific gravity is less than molten steel float on steel
Liquid molten bath top surface is far from the area Er Chongxing, and slab is that direct continuously casting shapes under vacuum conditions, avoids traditional work
The secondary pollution of the nonmetallic materials such as chute, filter, heat-preservation cotton is poured necessary to skill, can be significantly reduced in slab in this way
The amount of inclusions.
In addition, the preparation method of high temperature alloy further include continuous casting process before smelting technology, smelting technology is under vacuum
It carries out, in smelting technology, refining temperature is 1500~1600 DEG C, and vacuum degree is less than 3Pa.Wherein, the vacuum in smelting technology
Degree is preferably 0.1-3Pa.Because while theoretically the surface quality of the high temperature alloy of the lower acquisition of vacuum degree is better, but vacuum
It is higher to spend the lower requirement to equipment, will increase production cost.Therefore continuous casting work is carried out in this vacuum range, it is existing
Conducive to the comprehensive quality of guarantee alloy, and have both preferable economic benefit.And inventors have found that phase in the actual production process
Under same process conditions, after vacuum degree is decreased below 0.5Pa, the surface quality of high temperature alloy mentions more significantly
Height, and be held essentially constant lower than high temperature alloy quality after 0.1Pa, therefore comprehensively consider product quality and cost control, it is special
Vacuum degree in not preferred smelting technology is less than 0.5Pa and to be greater than 0.1Pa.
The preparation method of the high temperature alloy provided through the invention, the smelting for making alloy and continuous casting are completely in vacuum environment
Lower progress obtains high according to the vacuum melting technique of high temperature alloy by process procedures such as fusing, high temperature refinery, alloyings
Pure alloy molten steel, by power adjustment, by molten steel temperature control in the suitable temperature for being suitable for continuous casting, then according to being suitable for
The technological parameter of vacuum continuous casting carries out continuous casting, guarantees that height can be effectively prevented still under vacuum environment in molten steel in continuous casting process
The scaling loss of the active elements such as significant alloying element such as Al, Ti, Zr, Hf in temperature alloy, and then guarantee the high-purity of continuous casting billet
Degree.For the high temperature alloy continuous casting stick produced through the online Length-fixing cutting of automatic cutting system, subsequent needs Shot Blasting that can hand over
Goods.
Hereinafter, by high temperature alloy of the invention preparation method and its optimum condition be described in detail.At this
In invention, unless otherwise instructed, listed percentage is mass percent.
The preparation method of high temperature alloy of the invention uses following steps:
1, ingredient: select electrolytic nickel, metallic aluminium, crome metal, titanium sponge, ferro-boron, metal molybdenum, tungsten, electrode graphite etc. for original
Material, it is stand-by to weigh raw material in proportion.
2, feed: by electrolytic nickel, crome metal, metal molybdenum, tungsten etc., easily oxidized alloy element is not put in crucible bottom,
Other raw materials are added from hopper.
3, it smelting technology: carries out, specifically includes in vacuum level continuous casting medium frequency induction melting furnace:
1) heating above-mentioned raw materials to fine melt (preferably using after being heated to nickel red heat, small-power power transmission 10 minutes with dehydrogenation, then
The mode of high-power power transmission to fine melt heats), start to refine, 1500~1600 DEG C of refining temperature, the time regard molten steel number and
It is fixed, it is preferably controlled in 0.5~2 hour, vacuum degree is less than 3Pa during control refining.
2) after having refined, the elements such as cooling plus C, Al, Ti；
3) after melting down Al, Ti, waiting temperature properly carries out continuous casting afterwards.
4, continuous casting process specific steps include:
1) after the chemical component of molten steel is qualified, the degree of superheat of molten steel is controlled to 20-100 DEG C, alloy is made to have good flowing
Property, to guarantee that alloy stabilization during continuous casting work fills type.In addition, being carried out not in entire continuous casting process to casting pool
It discontinuously heats, to keep stablizing for superheat of liquid steel constant.
2) continuous casting opens casting operation, and continuous casting Blank drawing machine pulls dummy bar period reciprocal horizontal in a manner of pull-stop-push-drawing to transport
Dynamic, wire velocity control is at 0.5-1.5 ms/min, and after casting blank surface temperature is stablized, continuous casting, which opens casting operation, to be terminated；
3) continuous casting work operates: being gradually increased drawing speed after opening casting operation to 2-4 ms/min, the heat according to steel grade is swollen
The parameters such as swollen coefficient, the capacity of heat transmission, hot tearing susceptibility, choose teeming speed appropriate；
4) argon filling operates, and in continuous casting process, the argon gas of 0.09-0.05Mpa is filled with into continuous casting production, to prevent molten steel
It splashes and reduces resistance of billet withdrawal, fluctuations of vacuum value controls within 0.002MPa.
Using above-mentioned preparation method of the invention, K418 alloy, K417 alloy, GH4169 alloy, FGH4095 are prepared
Alloy, FGH4097 alloy, JG4246A alloy, DZ125 alloy totally seven kinds of vacuum continuous casting high temperature alloy master alloy bars, wherein
K418, K417 alloy are the cast superalloy of typical high Al, Ti content, and GH4169 alloy is that typical deformation high temperature closes
Gold, FGH4095 alloy and FGH4097 alloy are typical powder metallurgy superalloy, and JG4246A alloy is Ni3Al base high temperature structural
Material, DZ125 alloy are typical orientation high temperature alloy.
Claims (10)
1. a kind of preparation method of high temperature alloy, which is characterized in that the preparation method of the high temperature alloy includes continuous casting process,
The continuous casting process carry out under vacuum and the following steps are included:
(1) degree of superheat of molten steel is controlled to 20-100 DEG C；
(2) continuous casting Blank drawing machine is made to pull dummy bar period reciprocating horizontal motion in a manner of pull-stop-push-drawing, by linear velocity control
System is at 0.5-1.5 ms/min, until casting blank surface temperature is stablized；
(3) being gradually increased drawing speed is 2-4 ms/min, continuous casting work is carried out, during continuous casting work, among continuous casting
The argon gas of 0.09-0.05Mpa is filled in packet.
2. the preparation method of high temperature alloy according to claim 1, which is characterized in that in the continuous casting process, be filled with institute
After stating argon gas, fluctuations of vacuum value≤0.002MPa is controlled.
3. the preparation method of high temperature alloy according to claim 1, which is characterized in that the continuous casting process is using uphill casting
The forming of formula continuously casting.
4. the preparation method of high temperature alloy according to claim 1, which is characterized in that the preparation side of the high temperature alloy
Method further include continuous casting process before smelting technology, the smelting technology carries out under vacuum, in smelting technology, refining temperature
Degree is 1500~1600 DEG C, and vacuum degree is less than 3Pa.
5. the preparation method of high temperature alloy according to claim 1, which is characterized in that the smelting technology is in vacuum water
It is carried out in flat continuous casting medium frequency induction melting furnace.
6. the preparation method of high temperature alloy according to claim 1, which is characterized in that in the smelting technology, refining
Time is 0.5~2 hour.
7. a kind of high temperature alloy, which is characterized in that the high temperature alloy is using described in any one of claim 1~6
High temperature alloy preparation method prepared by.
8. high temperature alloy according to claim 7, which is characterized in that Al, Ti, Hf and Zr member in the high temperature alloy
The content of element adds up to 0~12 mass %.
9. high temperature alloy according to claim 7, which is characterized in that Al, Ti, Hf and Zr member in the high temperature alloy
The content of element adds up to 5~12 mass %.
10. high temperature alloy according to claim 7, which is characterized in that the high temperature alloy is K418 alloy, K417 conjunction
Any one in gold, GH4169 alloy, FGH4095 alloy, FGH4097 alloy, JG4246A alloy, DZ125 alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811421580.6A CN109536749A (en) | 2018-11-27 | 2018-11-27 | A kind of preparation method and its high temperature alloy of high temperature alloy |
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| CN201811421580.6A CN109536749A (en) | 2018-11-27 | 2018-11-27 | A kind of preparation method and its high temperature alloy of high temperature alloy |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118319A (en) * | 2020-02-20 | 2020-05-08 | 江苏奇纳新材料科技有限公司 | Preparation method of high-temperature alloy electrode bar for plasma rotating electrode |
| CN111979582A (en) * | 2020-08-21 | 2020-11-24 | 西北工业大学 | Preparation method of single crystal superalloy with gradient structure |
| CN112453337A (en) * | 2021-02-02 | 2021-03-09 | 北京钢研高纳科技股份有限公司 | Preparation method of high-aluminum-titanium-content powder high-temperature alloy electrode bar |
-
2018
- 2018-11-27 CN CN201811421580.6A patent/CN109536749A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118319A (en) * | 2020-02-20 | 2020-05-08 | 江苏奇纳新材料科技有限公司 | Preparation method of high-temperature alloy electrode bar for plasma rotating electrode |
| CN111118319B (en) * | 2020-02-20 | 2020-11-06 | 江苏奇纳新材料科技有限公司 | Preparation method of high-temperature alloy electrode bar for plasma rotating electrode |
| CN111979582A (en) * | 2020-08-21 | 2020-11-24 | 西北工业大学 | Preparation method of single crystal superalloy with gradient structure |
| CN111979582B (en) * | 2020-08-21 | 2021-05-07 | 西北工业大学 | Preparation method of single crystal superalloy with gradient structure |
| CN112453337A (en) * | 2021-02-02 | 2021-03-09 | 北京钢研高纳科技股份有限公司 | Preparation method of high-aluminum-titanium-content powder high-temperature alloy electrode bar |
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Application publication date: 20190329 |