CN104313392B - A kind of high-strength fire-retarding titanium alloy - Google Patents
A kind of high-strength fire-retarding titanium alloy Download PDFInfo
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- CN104313392B CN104313392B CN201410627418.5A CN201410627418A CN104313392B CN 104313392 B CN104313392 B CN 104313392B CN 201410627418 A CN201410627418 A CN 201410627418A CN 104313392 B CN104313392 B CN 104313392B
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Abstract
The invention discloses a kind of high-strength fire-retarding titanium alloy, the one-tenth of following percentage by weight be grouped into: V+Nb35%～45%, Al8%～12%, (Mo+Ta+W)≤8%, O≤0.12%, surplus is Ti and inevitable impurity；Wherein, 20%≤V≤35%, 8%≤Nb≤20%, Mo≤5%, Ta≤3%, W≤4%；The described high-strength tensile strength >=900MPa referring to titanium alloy at room temperature.The high-strength fire-retarding titanium alloy room temperature tensile intensity of the present invention reaches more than 900MPa, 600 DEG C of tensile strength reach more than 680MPa, fire resistance slightly below AlloyC alloy but be significantly better than Ti 6Al 4V titanium alloy, cost be significantly lower than AlloyC, plasticity is better than Ti3Al and TiAl alloy.
Description
Technical field
The invention belongs to Burn-Resistant Titanium Alloy technical field, be specifically related to a kind of high-strength fire-retarding titanium alloy.
Background technology
Titanium alloy is that aero-engine alleviates construction weight, improves the important lightweight that thrust-weight ratio must use
Material, and irreplaceable within considerably long period.But titanium alloy has, and thermal conductivity factor is low, oxidation is raw
Become heat and burning to generate the physical characteristic that heat is high, cause at aero-engine applied environment (high temperature, height
Speed air-flow and touch mill) under easy ignition.Once there is " titanium fire ", can burn in several seconds and start
Machine, moment causes the tragedy of fatal crass, and consequence is the most serious.The U.S. and Russia are from the seventies
Just actively develop the research of titanium combustion problem, and have developed the Burn-Resistant Titanium Alloy of oneself respectively.The U.S.
Full β type Burn-Resistant Titanium Alloy Alloy C (Ti-35V-15Cr) successful Application the most on the engine developed.
Russia then develops Ti-Cu-Al system Burn-Resistant Titanium Alloy BTT-1 and BTT-3 according to friction mechanism.
TiAl alloy has preferable fire resistance, but the fragility of TiAl alloy hinders its application.AlloyC
Alloy strength is high, plasticity is good, but owing to element V must be with pure vanadium or V-Cr or Ti-V intermediate alloy
Form add, its cost is the highest, and application is very limited.BTT-1 and BTT-3 alloy heat is strong
Property poor, it is impossible to for higher temperature, the most not yet obtain reality application.Therefore, exploitation one becomes
This highest high-strength anti-flaming alloy has clear and definite application demand.
Summary of the invention
The technical problem to be solved is for above-mentioned the deficiencies in the prior art, it is provided that a kind of
High-strength fire-retarding titanium alloy.This high-strength fire-retarding titanium alloy room temperature tensile intensity reaches more than 900MPa, and 600
DEG C tensile strength reaches more than 680MPa, fire resistance slightly below AlloyC alloy but be significantly better than
Ti-6Al-4V titanium alloy, cost is significantly lower than AlloyC, and plasticity is better than Ti3Al and TiAl alloy.
For solving above-mentioned technical problem, the technical solution used in the present invention is: a kind of high-strength fire-retarding titanium closes
Gold, it is characterised in that be grouped into by the one-tenth of following percentage by weight: V+Nb 35%～45%, Al
8%～12%, (Mo+Ta+W)≤8%, O≤0.12%, surplus is Ti and the most miscellaneous
Matter；Wherein, 20%≤V≤35%, 8%≤Nb≤20%, Mo≤5%, Ta≤3%, W≤4%；
The described high-strength tensile strength >=900MPa referring to titanium alloy at room temperature.
Above-mentioned a kind of high-strength fire-retarding titanium alloy, it is characterised in that by the composition of following percentage by weight
Composition: V 35%, Nb 8%, Mo 4%, W 4%, Al 8%, O≤0.12%, surplus is Ti
With inevitable impurity.
Above-mentioned a kind of high-strength fire-retarding titanium alloy, it is characterised in that by the composition of following percentage by weight
Composition: V 30%, Nb 12%, Mo 5%, Ta 3%, Al 9%, O≤0.12%, surplus is Ti
With inevitable impurity.
Above-mentioned a kind of high-strength fire-retarding titanium alloy, it is characterised in that by the composition of following percentage by weight
Composition: V 27%, Nb 15%, Mo 4%, Ta 2%, W 2%, Al 10%, O≤0.12%,
Surplus is Ti and inevitable impurity.
Above-mentioned a kind of high-strength fire-retarding titanium alloy, it is characterised in that by the composition of following percentage by weight
Composition: V 25%, Nb 20%, Mo 2%, W 2%, Al 11%, O≤0.12%, surplus is Ti
With inevitable impurity.
Above-mentioned a kind of high-strength fire-retarding titanium alloy, it is characterised in that by the composition of following percentage by weight
Composition: V 20%, Nb 20%, Mo 2%, W 4%, Al 11%, O≤0.12%, surplus is Ti
With inevitable impurity.
Above-mentioned a kind of high-strength fire-retarding titanium alloy, it is characterised in that by the composition of following percentage by weight
Composition: V 20%, Nb 15%, Ta 3%, W 4%, Al 12%, O≤0.12%, surplus is Ti
With inevitable impurity.
The customary preparation methods that preparation method is titanium alloy of the high-strength fire-retarding titanium alloy of the present invention: according to
Need to select suitable intermediate alloy with titanium sponge by design composition mixing electrode pressing, through conventional vacuum
Consumable electroarc furnace is compound with vacuum consumable electric arc skull crucible molten through three meltings or vacuum consumable electrode arc furnace
Sweetening process makes alloy pig, alloy pig at a temperature of 1100 DEG C～1200 DEG C after three fire are time deformed above
Obtaining alloy finished product, alloy finished product uses after 850 DEG C～950 DEG C annealings.
The present invention compared with prior art has the advantage that the high-strength fire-retarding titanium alloy room temperature of the present invention
Tensile strength reaches more than 900MPa, and 600 DEG C of tensile strength reach more than 680MPa, fire resistance
Being slightly below AlloyC alloy but be significantly better than Ti-6Al-4V titanium alloy, cost is significantly lower than AlloyC,
Plasticity is better than Ti3Al and TiAl alloy.
Below by embodiment, technical scheme is described in further detail.
Detailed description of the invention
The high-strength fire-retarding titanium alloy of the present invention, involved intermediate alloy includes that aluminum-vanadium alloy, aluminium niobium close
Gold, metal niobium (niobium sintered bar, niobium plate or niobium rod), molybdenum powder, aluminium molybdenum alloys, titanium-tungsten, titanium
Tantalum alloys etc., the titanium sponge used is 0 grade of titanium sponge.The percentage by weight of its alloy consists of
V+Nb 35%～45%, Al 8%～12%, (Mo+Ta+W)≤8%, O≤0.12%, surplus
For Ti and inevitable impurity；Wherein, 20%≤V≤30%, 8%≤Nb≤20%, Mo≤
5%, Ta≤3%, W≤4%.Select suitable intermediate alloy and titanium sponge by being designed to as required
Point mixing electrode pressing, through conventional vacuum consumable electrode arc furnace through three meltings or vacuum consumable electrode arc furnace with
Vacuum consumable electric arc skull crucible compound smelting technique makes alloy pig, and alloy pig is at 1100 DEG C～1200
Obtaining alloy finished product after three fire time are deformed above at a temperature of DEG C, alloy finished product moves back through 850 DEG C～950 DEG C
Fire uses after processing.Room temperature tensile properties after the annealed process of alloy finished product is: σb>=900MPa,
δ: 4%～15%；600 DEG C of tensile properties are: σb>=680Pa, δ: 6%～25%.Alloy anti-flammability
Test can use the method lighted that rubs in preheating atmosphere, TC4 titanium alloy ignition temperature is less than 350
DEG C, and AlloyC alloy ignition temperature is more than 500 DEG C, the alloy ignition temperature of the present invention be 450 DEG C～
550 DEG C, fire resistance is slightly below AlloyC alloy, is significantly higher than TC4 titanium alloy.
Embodiment 1
The nominal composition of the present embodiment titanium alloy is Ti-35V-8Nb-4Mo-4W-8Al, the most by weight hundred
Proportion by subtraction is calculated as: V 35%, Nb 8%, Mo 4%, W 4%, Al 8%, and surplus is Ti and can not keep away
The impurity exempted from, wherein O content is 0.09wt%.Raw material select be: Al-85V alloy, niobium plate,
Al-70Mo alloy, Ti-30W alloy and 0 grade of titanium sponge.
The preparation method of the titanium alloy of the present embodiment is: by intermediate alloy (Al-85V alloy, niobium plate,
Al-70Mo alloy and Ti-30W alloy) with 0 grade of titanium sponge by design composition mixing electrode pressing,
Casting alloy pig with vacuum consumable electrode arc furnace through three meltings, in alloy pig, the actual measurement content of O is
0.09%, alloy pig obtains diameter 60mm alloy pole at 1100 DEG C after four fire time forgings, closes
Gold pole uses after 900 DEG C/60min makes annealing treatment.
The room temperature tensile properties of the alloy pole after the present embodiment annealing is: σbFor 900MPa, δ
It is 15%；600 DEG C of tensile properties are: σbIt is 25% for 680MPa, δ.Use in preheating atmosphere
The method that friction is lighted, alloy ignition temperature is 450 DEG C～550 DEG C, and alloy fire resistance is slightly below
AlloyC alloy, is significantly better than Ti-6Al-4V alloy.
Embodiment 2
The nominal composition of the present embodiment titanium alloy is Ti-30V-12Nb-5Mo-3Ta-9Al, the most by weight
Percentages is: V 30%, Nb 12%, Mo 5%, Ta 3%, Al 9%, and surplus is Ti and not
Evitable impurity, wherein O content is 0.10wt%.Raw material is selected: Al-85V alloy, Al-70Nb
Alloy, niobium plate, molybdenum powder, Ti-40Ta alloy and 0 grade of titanium sponge.
The preparation method of the titanium alloy of the present embodiment is: by intermediate alloy (Al-85V alloy, Al-70Nb
Alloy, niobium plate, molybdenum powder and Ti-40Ta alloy) mix compacting electricity with 0 grade of titanium sponge by design composition
Pole, casts alloy pig with vacuum consumable electrode arc furnace through three meltings, and in alloy pig, the actual measurement content of O is
0.10%, alloy pig obtains 70mm alloy square rod, alloy side at 1200 DEG C after four fire time forgings
Rod uses after 900 DEG C/120min makes annealing treatment.
The room temperature tensile properties of the alloy square rod after the present embodiment annealing is: σbFor 960MPa, δ
It is 8%；600 DEG C of tensile properties are: σbIt is 18% for 730MPa, δ.Use in preheating atmosphere
The method that friction is lighted, alloy ignition temperature is 450 DEG C～550 DEG C, and alloy fire resistance is slightly below
AlloyC alloy, is significantly better than Ti-6Al-4V alloy.
Embodiment 3
The nominal composition of the present embodiment titanium alloy is Ti-27V-15Nb-4Mo-2Ta-2W-10Al, i.e. presses
Percentage by weight is calculated as: V 27%, Nb 15%, Mo 4%, Ta 2%, W 2%, Al 10%, remaining
Amount is Ti and inevitable impurity, and wherein O content is 0.12wt%.Raw material is selected: Al-85V
Alloy, Al-70Nb alloy, niobium plate, molybdenum powder, Ti-40Ta alloy, Ti-30W alloy and 0 grade of sea
Continuous titanium.
The preparation method of the titanium alloy of the present embodiment is: by intermediate alloy (Al-85V alloy, Al-70Nb
Alloy, niobium plate, molybdenum powder, Ti-40Ta alloy and Ti-30W alloy) with 0 grade of titanium sponge by being designed to
Divide mixing electrode pressing, melt with vacuum consumable electric arc skull crucible secondary with after vacuum consumable electrode arc furnace incipient melting
Refining, after carry out three meltings through vacuum consumable electrode arc furnace and make alloy pig, the actual measurement of O in alloy pig
Content is 0.12%, and alloy pig rolls through two fire time at 1150 DEG C after three fiery forgings again, it is thus achieved that
The sheet alloy of thickness 10mm, sheet alloy uses after 850 DEG C/60min makes annealing treatment.
The room temperature tensile properties of the sheet alloy after the present embodiment annealing is: σbFor 1050MPa,
δ is 6%；600 DEG C of tensile properties are: σbIt is 15% for 820MPa, δ.Use in preheating atmosphere
The method that friction is lighted, alloy ignition temperature is 450 DEG C～550 DEG C, and alloy fire resistance is slightly below
AlloyC alloy, is significantly better than Ti-6Al-4V alloy.
Embodiment 4
The nominal composition of the present embodiment titanium alloy is Ti-25V-20Nb-2Mo-2W-11Al, the most by weight
Percentages is: V 25%, Nb 20%, Mo 2%, W 2%, Al 11%, and surplus is Ti and not
Evitable impurity, wherein O content is 0.08wt%.Raw material is selected: Al-85V alloy, Al-70Nb
Alloy, niobium sintered bar, molybdenum powder, Ti-30W alloy and 0 grade of titanium sponge.
The preparation method of the titanium alloy of the present embodiment is: by intermediate alloy (Al-85V alloy, Al-70Nb
Alloy, niobium sintered bar, molybdenum powder and Ti-30W alloy) mix pressure with 0 grade of titanium sponge by design composition
Electrode processed, casts alloy pig with vacuum consumable electrode arc furnace through three meltings, and in alloy pig, the actual measurement of O contains
Amount is 0.08%, and alloy pig obtains diameter through a fire time rolling at 1100 DEG C after five fire time forgings again
20mm alloy pole, alloy pole uses after 900 DEG C/60min makes annealing treatment.
The room temperature tensile properties of the alloy pole after the present embodiment annealing is: σbFor 1030MPa,
δ is 9%；600 DEG C of tensile properties are: σbIt is 21% for 800MPa, δ.Use in preheating atmosphere
The method that friction is lighted, alloy ignition temperature is 450 DEG C～550 DEG C, and alloy fire resistance is slightly below
AlloyC alloy, is significantly better than Ti-6Al-4V alloy.
Embodiment 5
The nominal composition of the present embodiment titanium alloy is Ti-20V-20Nb-2Mo-4W-11Al, the most by weight
Percentages is: V 20%, Nb 20%, Mo 2%, W 4%, Al 11%, and surplus is Ti and not
Evitable impurity, wherein O content is 0.08wt%.Raw material is selected: Al-85V alloy, Al-70Nb
Alloy, niobium rod, molybdenum powder, Ti-30W alloy and 0 grade of titanium sponge.
The preparation method of the titanium alloy of the present embodiment is: by intermediate alloy (Al-85V alloy, Al-70Nb
Alloy, niobium rod, molybdenum powder and Ti-30W alloy) mix compacting electricity with 0 grade of titanium sponge by design composition
After extremely, cast alloy pig with vacuum consumable electrode arc furnace through three meltings, the actual measurement content of O in alloy pig
Being 0.08%, alloy pig obtains diameter through a fire time rolling at 1200 DEG C after five fire time forgings again
60mm alloy pole, alloy pole uses after 950 DEG C/90min makes annealing treatment.
The room temperature tensile properties of the alloy pole after the present embodiment annealing is: σbFor 1010MPa,
δ is 7%；600 DEG C of tensile properties are: σbIt is 18% for 780MPa, δ.Use in preheating atmosphere
The method that friction is lighted, alloy ignition temperature is 450 DEG C～550 DEG C, and alloy fire resistance is slightly below
AlloyC alloy, is significantly better than Ti-6Al-4V alloy.
Embodiment 6
The nominal composition of the present embodiment titanium alloy is Ti-20V-15Nb-3Ta-4W-12Al, the most by weight
Percentages is: V 20%, Nb 15%, Ta 3%, W 4%, Al 12%, and surplus is Ti and not
Evitable impurity, wherein O content is 0.11wt%.Raw material is selected: Al-85V alloy, Al-70Nb
Alloy, Ti-40Ta alloy, Ti-30W alloy and 0 grade of titanium sponge.
The preparation method of the titanium alloy of the present embodiment is: by intermediate alloy (Al-85V alloy, Al-70Nb
Alloy, Ti-40Ta alloy and Ti-30W alloy) mix compacting electricity with 0 grade of titanium sponge by design composition
After extremely, cast alloy pig with vacuum consumable electrode arc furnace through three meltings, the actual measurement content of O in alloy pig
Being 0.11%, alloy pig obtains diameter through a fire time rolling at 1180 DEG C after four fire time forgings again
20mm alloy pole, alloy pole uses after 900 DEG C/60min makes annealing treatment.
The room temperature tensile properties of the alloy pole after the present embodiment annealing is: σbFor 1080MPa,
δ is 4%；600 DEG C of tensile properties are: σbIt is 6% for 820MPa, δ.Use in preheating atmosphere
The method that friction is lighted, alloy ignition temperature is 450 DEG C～550 DEG C, and alloy fire resistance is slightly below
AlloyC alloy, is significantly better than Ti-6Al-4V alloy.
The above, be only presently preferred embodiments of the present invention, and the present invention not does any restriction, all
It is any simple modification, change and equivalence knot above example made according to inventive technique essence
Structure changes, and all still falls within the protection domain of technical solution of the present invention.
Claims (7)
1. a high-strength fire-retarding titanium alloy, it is characterised in that be grouped by the one-tenth of following percentage by weight
Become: V+Nb 35%～45%, Al 8%～12%, 4%≤(Mo+Ta+W)≤8%, O≤0.12%,
Surplus is Ti and inevitable impurity；Wherein, 20%≤V≤35%, 8%≤Nb≤20%, Mo
≤ 5%, Ta≤3%, W≤4%；Described high-strength refer to titanium alloy tensile strength at room temperature >=
900MPa。
A kind of high-strength fire-retarding titanium alloy the most according to claim 1, it is characterised in that by with
The one-tenth of lower percentage by weight is grouped into: V 35%, Nb 8%, Mo 4%, W 4%, Al 8%, O
≤ 0.12%, surplus is Ti and inevitable impurity.
A kind of high-strength fire-retarding titanium alloy the most according to claim 1, it is characterised in that by with
The one-tenth of lower percentage by weight is grouped into: V 30%, Nb 12%, Mo 5%, Ta 3%, Al 9%, O
≤ 0.12%, surplus is Ti and inevitable impurity.
A kind of high-strength fire-retarding titanium alloy the most according to claim 1, it is characterised in that by with
The one-tenth of lower percentage by weight is grouped into: V 27%, Nb 15%, Mo 4%, Ta 2%, W 2%,
Al 10%, O≤0.12%, surplus is Ti and inevitable impurity.
A kind of high-strength fire-retarding titanium alloy the most according to claim 1, it is characterised in that by with
The one-tenth of lower percentage by weight is grouped into: V 25%, Nb 20%, Mo 2%, W 2%, Al 11%, O
≤ 0.12%, surplus is Ti and inevitable impurity.
A kind of high-strength fire-retarding titanium alloy the most according to claim 1, it is characterised in that by with
The one-tenth of lower percentage by weight is grouped into: V 20%, Nb 20%, Mo 2%, W 4%, Al 11%, O
≤ 0.12%, surplus is Ti and inevitable impurity.
A kind of high-strength fire-retarding titanium alloy the most according to claim 1, it is characterised in that by with
The one-tenth of lower percentage by weight is grouped into: V 20%, Nb 15%, Ta 3%, W 4%, Al 12%, O
≤ 0.12%, surplus is Ti and inevitable impurity.
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| CN106270381B (en) * | 2016-09-26 | 2018-12-11 | 哈尔滨工业大学 | A method of airspace engine TiAl alloy bend pipe casting is prepared with integral type wax-pattern |
| CN106526065B (en) * | 2016-10-31 | 2018-11-30 | 中国航空工业集团公司北京航空材料研究院 | A kind of Ti-Al series intermetallic compound flammability test method |
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| GB838519A (en) * | 1956-07-23 | 1960-06-22 | Crucible Steel Co America | Stable beta containing alloys of titanium |
| GB2238057A (en) * | 1986-01-02 | 1991-05-22 | United Technologies Corp | High strength nonburning beta titanium alloy |
| KR20050005506A (en) * | 2002-06-11 | 2005-01-13 | 스미토모 긴조쿠 고교 가부시키가이샤 | β- TYPE TITANIUM ALLOY AND PROCESS FOR PRODUCING THE SAME |
| JP4528109B2 (en) * | 2003-12-17 | 2010-08-18 | 新日本製鐵株式会社 | Low elastic β-titanium alloy having an elastic modulus of 65 GPa or less and method for producing the same |
| CN102011026B (en) * | 2010-12-02 | 2012-06-27 | 河北工业大学 | Titanium alloy used for aviation fastener and manufacturing method |
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