CN109136643A - A kind of casting high thermal conductivity and has liquid spinodal decomposition Type Titanium Alloy - Google Patents
A kind of casting high thermal conductivity and has liquid spinodal decomposition Type Titanium Alloy Download PDFInfo
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- CN109136643A CN109136643A CN201811135568.9A CN201811135568A CN109136643A CN 109136643 A CN109136643 A CN 109136643A CN 201811135568 A CN201811135568 A CN 201811135568A CN 109136643 A CN109136643 A CN 109136643A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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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
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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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
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
Abstract
The invention discloses a kind of casting high thermal conductivity and has liquid spinodal decomposition Type Titanium Alloy.According to weight percent, the ingredient of the alloy are as follows: Sn:4.0-6.0wt.%, Gd:0.5-0.8wt.%, Yb:1.2-1.4wt.%, Sb:3.0-3.8wt.%, Ni:5.0-6.0wt.%, Cu:2.0-3.0wt.%, Ge:1.0-2.0wt.%, Ag:1.2-1.5wt.%, surplus are titanium.The material is requires light-weighted structural material applications field to provide a kind of technical solution different from common titanium alloy, that is, provides a kind of titanium alloy with excellent casting character.The implementation and industrialization of the alloy can push significantly China to the new material update of high-end titanium alloy and business upgrade requirement.
Description
Technical field
The present invention relates to technical field of alloy, specifically, being related to a kind of titanium alloy.
Background technique
Titanium is a kind of important structural metal to grow up the 1950s, and because having, intensity is high, corrosion resistance is good, resistance to
The features such as hot high and be widely used in every field.Alloying element appropriate is added in titanium, makes its phase transition temperature and is mutually contained
Amount, which gradually changes, obtains the titanium alloy of different tissues.Titanium alloy has a series of excellent physics, mechanics and chemical property, main
Show: (1) specific strength is high.The density of titanium alloy is generally in 4.5g/cm3Left and right, only the 60% of steel, the intensity of pure titanium connect
The intensity of nearly ordinary steel, some high strength titanium alloys have been more than the intensity of many structural alloy steels.Therefore the specific strength of titanium alloy
(strength/density) is much larger than other structural metallic materials, can produce the parts and components that unit strength is high, rigidity is good, light.(2) hot
Intensity is high., can be in 450-500 DEG C of at a temperature of long-term work using temperature than aluminium alloy Gao Ji Baidu, and the work of aluminium alloy
Temperature is then at 200 DEG C or less.(3) corrosion stability is good.Titanium alloy works in humid atmosphere and seawater medium, and corrosion stability is far excellent
In stainless steel.It is especially strong to the resistance of spot corrosion, acid etching, stress corrosion.
Titanium alloy is widely used in civil and military aviation field.The advantage of titanium alloy is: (1) mitigating knot
Structure weight improves structure efficiency.Titanium alloy has the characteristics that intensity strong steel but density is small in, closes instead of structural steel and high temperature
Construction weight can be greatly reduced in gold, while can also save money.(2) meet the requirement of high temperature position.In the height of aircraft
Warm position (such as rear body) may replace the aluminium alloy that cannot be met the requirements by applied at elevated temperature performance.(3) meet highly resistance corrosion and
The requirement of long-life.Titanium alloy fatigue life with higher and excellent corrosion resistance, can be improved the anticorrosive of structure
Ability and service life meet the requirement of Advanced Aircraft, engine high reliability and long-life.
In general, all due to become solid-state from liquid volume receipts can occur for metal or alloy when solidification
Contracting, this is because solid density is greater than caused by liquid.It will be apparent that the difference of these density will lead in process of setting
Cast hole and loose formation.In addition, alloy in process of setting since first precipitated phase forms dendrite trunk and side shoot and
Prevent later melt from effectively filling up interdendritic gap, can also promote hole and loose generation.Thus, polynary conjunction
Gold casting compactness of casting in solidification is always the difficult point in materialogy.For casting alloy, people can be selected
The ingredient near multi-element eutectic point is selected, so that having fixed and single phase transition temperature in the process of setting of alloy, because of eutectic
Temperature is fixed.Not only make casting alloying component in a wide range of uniform in this way, but also mutually coordinated due to eutectic phase
It generates and makes the hole of casting and loose reached minimum.
Due to titanium alloy physical property, the extremely superiority of mechanical property and chemical property, domestic and international researcher and machine
Structure has made extensive and intensive studies titanium alloy, and has developed a series of wrought titanium alloy and cast titanium conjunction
Gold.These titanium alloys not only make it possible the industrial upgradings of relevant industries after popularization, also greatly promoting property related fields
Technology development.It but is based on designing the ingredients of these alloys polynary to the optimization of the casting character of cast titanium alloy
Near alloy eutectic point, thus the alloy near these eutectic points can greatly reduce in casting process in casting process
Hole and loose formation.Due to the limitation of the design concept, alloying component has been limited near multicomponent alloy eutectic point, still
Have a superior physical properties, the alloying component point of mechanical property and chemical property may not necessarily be near multi-element eutectic point.Thus exist
Causing casting titanium alloy in actual use is not poor mechanical property, is exactly that heat transfer property or electric conductivity cannot expire
The requirement used enough.
With the development of the world today and the raising of living standards of the people, to Ti alloy with high performance material and it is used in
The demand of extreme environment advanced titanium alloys material is also more and more.Predictably titanium-base alloy can be in industrial circle and national defence
Field shows more extensive application prospect.The innovation for carrying out Alloy Materials be unable to do without alloy structure and ingredient design, and
The thermodynamics and kinetics of material are the main methods for solving the problems, such as such.It is true by the screening and ingredient of optimized alloy element
It is fixed, it not only can achieve required various performance indicators, can also reduce the production cost of alloy smelting and processing and to equipment
Requirement.Not only service life has further raising to such product, is also convenient for industrialization large-scale production.
Summary of the invention
The purpose of the present invention is to overcome the deficiency in the prior art, provides a kind of casting high thermal conductivity and has liquid amplitude modulation point
Solve Type Titanium Alloy.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of casting high thermal conductivity and has liquid spinodal decomposition Type Titanium Alloy.By weight percentage, the group of alloy becomes Sn:
4.0-6.0wt.%,Gd:0.5-0.8wt.%,Yb:1.2-1.4wt.%,Sb:3.0-3.8wt.%,Ni:5.0-6.0wt.%,Cu:
2.0-3.0wt.%, Ge:1.0-2.0wt.%, Ag:1.2-1.5wt.%, surplus are titanium.
A kind of above-mentioned casting high thermal conductivity and have liquid spinodal decomposition Type Titanium Alloy, includes the following steps: that raw material are adopted
With titanium sponge, alloying element is added in the form of pure metal or intermediate alloy.Alloy raw material is after ingredient and mixing, with press pressure
Small electrode is made.Several small electrode groups are welded together, melting 3 times in consumable electrode vacuum furnace are put into.In last melting once
In the process, melts of titanium alloy is cast in vacuum drying oven and is come out of the stove；Alloy casting uses the punching block of diameter 100-150mm, and uses
The mode of water cooling cools down.Casting rod is heated in 840-880 degree, is forged using precise forging machine, drafts per pass is 3-5%.
An intermediate annealing is carried out between every 3 passage, temperature is 580-600 degree, 1.5 hours；It can be using repeatedly forging, until forging stick
Diameter is between 40-60mm.Last heat treating regime are as follows: 350-360 degree solution treatment 1.8 hours, it is then air-cooled.
Compared with prior art, the invention has the following beneficial effects:
(1) liquid can be passed through in the design field of multicomponent alloy with the raising of the development of new technology and design of material ability
The spinodal decomposition effect of phase generates two different melts, and both melts is made to have very big fusing point difference.It is this
Design method is that another eliminate casts hole and loose novel method.Since the liquid phase spinodal decomposition of alloy can be suitable
It is realized in big composition range, thus material designer can be further increased by constantly adjusting alloying element and content
The other performance of material.This design method is undoubtedly very advanced, and in practice more compared to the design of eutectic point alloy
It can solve practical problem.But regrettably, in titanium alloy field, there is no based on the design concept both at home and abroad at present
New product occurs.Increasingly developed with science and technology and industry, the use environment and condition of titanium alloy are also increasingly harsher.Thus,
It develops not near eutectic point and the casting with superior physical properties and mechanical property with titanium alloy is current heat both domestic and external
Point direction.This patent provides a kind of titanium of novel elimination casting hole and rarefaction defect based on liquid phase spinodal decomposition characteristic
Alloy and its technique.
(2) the novel casting titanium alloy of this patent design, during solidification, the liquid phase and richness Gd and Yb of rich Ti
Liquid phase constantly separated from initial alloy melt.The melt of these richnesses Ti is due to richness Gd and Yb melt phase of getting along well
It is molten, thus gradually squeezed in the gap of dendrite in process of setting along with the generation of dendrite, and narrow at these
It is finally solidified in gap, plays the role of supplement solidification hole.Thus, the alloy for having liquid phase spinodal decomposition characteristic is most suitable for
Prepare the casting of no solidification shrinkage hole because this material generate solidification hole the defects of it is few.With technical term come
It says, liquid alloy generates two kinds of mutually insoluble liquid phases during solidification, and the liquid phase of low melting point can be in process of setting
The dendrite hole that generates when compensation high-melting-point liquid phase solidification, thus physical property for casting and mechanical property have and extremely have
The effect of benefit.
(3) the novel casting titanium alloy of present patent application protection has wide solidification temperature range (940-1480 degree).
Wherein the solidification temperature range of main richness Ti melt is 1240-1480 degree, and the melt solidification temperature range of rich Gd and Yb are
940-1050 degree.The temperature range that the solidification temperature range of two kinds of liquid phases is covered from 1480 degree to 940 degree, thus with the conjunction
When gold is cast, the cast member consistency that can be obtained is high, can achieve 98% or more and goes out without apparent hole
It is existing.In addition, the alloy has extremely excellent reuse performance, the appearance profile of cast member is clear after 4 reuses, surface light
It is clean.Thus, yield rate not only can be improved in the industrialization of the material, can also substantially reduce production cost by multiple reuse.
(4) in aerospace craft, some components must be using the material with high thermal conductivity, and thermal conductivity is higher, more
Be conducive to rapidly export the heat that itself is generated.Reduce deformation of the component under Thermal Load simultaneously, make its operation is stable,
Improve the service life.Can be in the weight of space industry reduction device using the titanium alloy of excellent heat conducting performance, increase is portable to be had
Load is imitated, performance and the service life of corresponding component are improved.The high thermal conductivity titanium alloy of current industrialization is fewer, and this patent Shen
The titanium alloy that please be protected can perfectly fill up this blank.The titanium alloy of present patent application protection has excellent hot physical property
Energy.Within the temperature range of 100-500 degree, the mean thermal expansion coefficients of the material may remain in 8.510-6/ degree, thermally conductive system
Number can maintain 40-50W/mK, in comparison the thermal expansion coefficient of conventional titanium alloy is generally 9.6 within this temperature range10-6/ degree, thermal coefficient are generally 8-12W/mK.It, can since the titanium alloy of this patent design has excellent heating conduction
To expect that the material has extremely broad application prospect and market demand in aerospace field.
Specific embodiment
Embodiment 1
A kind of casting high thermal conductivity and has liquid spinodal decomposition Type Titanium Alloy.By weight percentage, the group of alloy becomes Sn:
4.0wt.%,Gd:0.5wt.%,Yb:1.2wt.%,Sb:3.0wt.%,Ni:5.0wt.%,Cu:2.0wt.%,Ge:1.0wt.%,Ag:
1.2wt.%, surplus are titanium.A kind of above-mentioned casting high thermal conductivity and have liquid spinodal decomposition Type Titanium Alloy, includes the following steps:
Raw material use titanium sponge, and alloying element is added in the form of pure metal or intermediate alloy.Alloy raw material after ingredient and mixing,
Small electrode is pressed into press.Several small electrode groups are welded together, melting 3 times in consumable electrode vacuum furnace are put into.Last
During melting once, melts of titanium alloy is cast in vacuum drying oven and is come out of the stove；Alloy casting uses the steel of diameter 100-150mm
Mould, and cooled down by the way of water cooling.Casting rod is heated in 840-880 degree, is forged using precise forging machine, pressure per pass
Amount is 3-5%.An intermediate annealing is carried out between every 3 passage, temperature is 580-600 degree, 1.5 hours；It can be using repeatedly forging
It makes, until forging stick diameter is between 40-60mm.Last heat treating regime are as follows: 350-360 degree solution treatment 1.8 hours, then
It is air-cooled.
The alloy has wide solidification temperature range (940-1480 degree).The wherein setting temperature of main richness Ti melt
Range is 1240-1480 degree, and the melt solidification temperature range of rich Gd and Yb are 940-1050 degree.The setting temperature model of two kinds of liquid phases
The temperature range covered from 1480 degree to 940 degree is enclosed, thus when being cast with the alloy, the casting that can be obtained
Part consistency is high, can achieve 98% or more and occurs without apparent hole.The titanium alloy of present patent application protection has excellent
Hot physical performance.Within the temperature range of 100-500 degree, the mean thermal expansion coefficients of the material may remain in 8.510-6/
Degree, thermal coefficient can maintain 42W/mK, in comparison the thermal expansion coefficient of conventional titanium alloy is general within this temperature range
It is 9.610-6/ degree, thermal coefficient are generally 8-12W/mK。
Embodiment 2
A kind of casting high thermal conductivity and has liquid spinodal decomposition Type Titanium Alloy.By weight percentage, the group of alloy becomes Sn:
6.0wt.%,Gd:0.8wt.%,Yb:1.4wt.%,Sb:3.8wt.%,Ni:6.0wt.%,Cu:3.0wt.%,Ge:1.0wt.%,Ag:
1.5wt.%, surplus are titanium.A kind of above-mentioned casting high thermal conductivity and have liquid spinodal decomposition Type Titanium Alloy, includes the following steps:
Raw material use titanium sponge, and alloying element is added in the form of pure metal or intermediate alloy.Alloy raw material after ingredient and mixing,
Small electrode is pressed into press.Several small electrode groups are welded together, melting 3 times in consumable electrode vacuum furnace are put into.Last
During melting once, melts of titanium alloy is cast in vacuum drying oven and is come out of the stove；Alloy casting uses the steel of diameter 100-150mm
Mould, and cooled down by the way of water cooling.Casting rod is heated in 840-880 degree, is forged using precise forging machine, pressure per pass
Amount is 3-5%.An intermediate annealing is carried out between every 3 passage, temperature is 580-600 degree, 1.5 hours；It can be using repeatedly forging
It makes, until forging stick diameter is between 40-60mm.Last heat treating regime are as follows: 350-360 degree solution treatment 1.8 hours, then
It is air-cooled.
The alloy has wide solidification temperature range (940-1480 degree).The wherein setting temperature of main richness Ti melt
Range is 1240-1480 degree, and the melt solidification temperature range of rich Gd and Yb are 940-1050 degree.The setting temperature model of two kinds of liquid phases
The temperature range covered from 1480 degree to 940 degree is enclosed, thus when being cast with the alloy, the casting that can be obtained
Part consistency is high, can achieve 98% or more and occurs without apparent hole.The titanium alloy of present patent application protection has excellent
Hot physical performance.Within the temperature range of 100-500 degree, the mean thermal expansion coefficients of the material may remain in 8.510-6/
Degree, thermal coefficient can maintain 48W/mK, in comparison the thermal expansion coefficient of conventional titanium alloy is general within this temperature range
It is 9.610-6/ degree, thermal coefficient are generally 8-12W/mK。
Embodiment 3
A kind of casting high thermal conductivity and has liquid spinodal decomposition Type Titanium Alloy.By weight percentage, the group of alloy becomes Sn:
4.2wt.%,Gd:0.6wt.%,Yb:1.3wt.%,Sb:3.5wt.%,Ni:5.2wt.%,Cu:2.5wt.%,Ge:1.2wt.%,Ag:
1.3wt.%, surplus are titanium.A kind of above-mentioned casting high thermal conductivity and have liquid spinodal decomposition Type Titanium Alloy, includes the following steps:
Raw material use titanium sponge, and alloying element is added in the form of pure metal or intermediate alloy.Alloy raw material after ingredient and mixing,
Small electrode is pressed into press.Several small electrode groups are welded together, melting 3 times in consumable electrode vacuum furnace are put into.Last
During melting once, melts of titanium alloy is cast in vacuum drying oven and is come out of the stove；Alloy casting uses the steel of diameter 100-150mm
Mould, and cooled down by the way of water cooling.Casting rod is heated in 840-880 degree, is forged using precise forging machine, pressure per pass
Amount is 3-5%.An intermediate annealing is carried out between every 3 passage, temperature is 580-600 degree, 1.5 hours；It can be using repeatedly forging
It makes, until forging stick diameter is between 40-60mm.Last heat treating regime are as follows: 350-360 degree solution treatment 1.8 hours, then
It is air-cooled.
The alloy has wide solidification temperature range (940-1480 degree).The wherein setting temperature of main richness Ti melt
Range is 1240-1480 degree, and the melt solidification temperature range of rich Gd and Yb are 940-1050 degree.The setting temperature model of two kinds of liquid phases
The temperature range covered from 1480 degree to 940 degree is enclosed, thus when being cast with the alloy, the casting that can be obtained
Part consistency is high, can achieve 98% or more and occurs without apparent hole.The titanium alloy of present patent application protection has excellent
Hot physical performance.Within the temperature range of 100-500 degree, the mean thermal expansion coefficients of the material may remain in 8.510-6/
Degree, thermal coefficient can maintain 45W/mK, in comparison the thermal expansion coefficient of conventional titanium alloy is general within this temperature range
It is 9.610-6/ degree, thermal coefficient are generally 8-12W/mK。
Claims (3)
1. a kind of casting high thermal conductivity and having liquid spinodal decomposition Type Titanium Alloy；According to weight percent, the ingredient of the alloy
Are as follows: Sn:4.0-6.0wt.%, Gd:0.5-0.8wt.%, Yb:1.2-1.4wt.%, Sb:3.0-3.8wt.%, Ni:5.0-
6.0wt.%,Cu:2.0-
3.0wt.%, Ge:1.0-2.0wt.%, Ag:1.2-1.5wt.%, surplus are titanium.
2. a kind of casting high thermal conductivity and having liquid spinodal decomposition Type Titanium Alloy according to claim 1, it is characterised in that
Including following smelting step: raw material use titanium sponge, and alloying element is added in the form of pure metal or intermediate alloy；Alloy is former
Material is pressed into small electrode with press after ingredient and mixing；Several small electrode groups are welded together, are put into consumable electrode vacuum furnace
Melting 3 times；During last melting once, melts of titanium alloy is cast in vacuum drying oven and is come out of the stove；Alloy casting is using straight
The punching block of diameter 100-150mm, and cooled down by the way of water cooling.
3. a kind of casting high thermal conductivity and having liquid spinodal decomposition Type Titanium Alloy according to claim 1, it is characterised in that
Include following procedure of processing: casting rod being heated in 840-880 degree, is forged using precise forging machine, drafts per pass is 3-
5%；An intermediate annealing is carried out between every 3 passage, temperature is 580-600 degree, 1.5 hours；It can be forged using multiple, until
Stick diameter is forged between 40-60mm；Last heat treating regime are as follows: 350-360 degree solution treatment 1.8 hours, it is then air-cooled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811135568.9A CN109136643A (en) | 2018-09-28 | 2018-09-28 | A kind of casting high thermal conductivity and has liquid spinodal decomposition Type Titanium Alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811135568.9A CN109136643A (en) | 2018-09-28 | 2018-09-28 | A kind of casting high thermal conductivity and has liquid spinodal decomposition Type Titanium Alloy |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006083444A (en) * | 2004-09-17 | 2006-03-30 | National Institute For Materials Science | Porous titanium alloy |
| CN103906850A (en) * | 2011-10-21 | 2014-07-02 | 利默里克大学 | Method of forming a sintered nickel-titanium-rare earth (ni-ti-re) alloy |
| CN106193933A (en) * | 2016-08-01 | 2016-12-07 | 陆坤 | A kind of preparation method of titanium alloy soundproof door |
| CN108559872A (en) * | 2018-06-05 | 2018-09-21 | 中国航发北京航空材料研究院 | A kind of TiAl alloy and preparation method thereof |
-
2018
- 2018-09-28 CN CN201811135568.9A patent/CN109136643A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006083444A (en) * | 2004-09-17 | 2006-03-30 | National Institute For Materials Science | Porous titanium alloy |
| CN103906850A (en) * | 2011-10-21 | 2014-07-02 | 利默里克大学 | Method of forming a sintered nickel-titanium-rare earth (ni-ti-re) alloy |
| CN106193933A (en) * | 2016-08-01 | 2016-12-07 | 陆坤 | A kind of preparation method of titanium alloy soundproof door |
| CN108559872A (en) * | 2018-06-05 | 2018-09-21 | 中国航发北京航空材料研究院 | A kind of TiAl alloy and preparation method thereof |
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