CN104818408B - A kind of high intensity Ti Al Fe Si alloys and preparation method thereof - Google Patents
A kind of high intensity Ti Al Fe Si alloys and preparation method thereof Download PDFInfo
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- 229910000676 Si alloy Inorganic materials 0.000 title claims abstract description 8
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 63
- 239000000956 alloy Substances 0.000 claims abstract description 63
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 25
- 238000002844 melting Methods 0.000 claims abstract description 20
- 230000008018 melting Effects 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 15
- 229910052786 argon Inorganic materials 0.000 claims abstract description 13
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims abstract description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 7
- 238000005339 levitation Methods 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 7
- 239000010936 titanium Substances 0.000 claims description 25
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- 229910018125 Al-Si Inorganic materials 0.000 claims description 9
- 229910018520 Al—Si Inorganic materials 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 6
- 210000001161 mammalian embryo Anatomy 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 229910018191 Al—Fe—Si Inorganic materials 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000013021 overheating Methods 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 238000005275 alloying Methods 0.000 abstract description 6
- 238000005266 casting Methods 0.000 abstract 2
- 230000003026 anti-oxygenic effect Effects 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
- 238000006467 substitution reaction Methods 0.000 abstract 1
- 229910000883 Ti6Al4V Inorganic materials 0.000 description 17
- 229910001069 Ti alloy Inorganic materials 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910001017 Alperm Inorganic materials 0.000 description 1
- 229910017082 Fe-Si Inorganic materials 0.000 description 1
- 229910017133 Fe—Si Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910009871 Ti5Si3 Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910000658 steel phase Inorganic materials 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
Disclosed by the invention is that percentage by weight is in a kind of low cost, high intensity Ti Al Fe Si alloys, the alloy：Al 3 8%, Fe 1 6%, Si 0 2%, N, O, C, H total content are surplus no more than 0.5%, Ti.V element of the present invention in cheap Fe and Si substitution Ti 6Al 4V alloys, intensity reduces about 20% cost up to more than 1000MPa.Simultaneously as the addition of Si elements, adds the creep-resistant property and antioxygenic property of alloy, the applicability of alloy in high temperature environments is improved.Preparation method is as follows：Raw material are added in the cold crucible levitation melting stove of argon gas protection in the alloying component ratio of design; ingot casting is obtained by repeatedly upset melting, ingot casting is forged into bar stock, bar is made after over mechanical processing; bar sampling is heat-treated, finally its performance characterized.
Description
Technical field
The invention belongs to titanium alloy field, and in particular to a kind of high intensity Ti-Al-Fe-Si alloys and preparation method thereof.
Background technology
The density of titanium is smaller, is 4.5g/cm3, is generally referred to as light metal with aluminium, magnesium etc., titanium alloy because with than
Intensity is high, corrosion resistance is good, heat resistance is high, easy welding the features such as and be widely used in every field.
Titanium is originally a kind of very active metal, and its equilibrium potential is low, but has a strong passivation tendency, and oxygen affinity
It is very high, the strong TiO of one layer of densification, adhesive force can be formed on surface rapidly in atmosphere2Film, so as to protect matrix, makes it not
It is corroded, can also rapid regeneration even if being destroyed.Titanium possesses specific strength maximum in metal, its alloy strength and steel phase
When, and density only has the 60% of steel, using titanium alloy as structural material, can largely mitigate its weight.Ti-6Al-4V makees
It is the most extensive using scope for earliest titanium alloy.In recent years, Ti-6Al-4V is used as a kind of light weight, high-strength, corrosion resistant excellent
Different lightweight structural material, is further lifted in the application of space flight and aviation, naval vessel and the field such as civilian.Yet with cost
Factor, although Ti-6Al-4V has many successfully application cases, its usage amount is still very limited.Simultaneously because Ti-6Al-4V exists
Croop property under high temperature is general, and is oxidized easily, and using effect is not good under the hot environment of part.
According to Wu Huan et al.《Influence of the beta stable element to titanium alloy α phase strengthening behaviors》, β is stable first within the specific limits
Element is stronger to the stability of β phases, and composition is higher for the tensile strength and hardness of Ti-Me α ' alloys.And Fe compares as one kind
Cr also eutectoid type beta stable elements eager to excel in whatever one does, its enhancing to alloy is particularly evident.
Seagle et al.《Creep-resistant Titanium Alloys》In the research of Ti-6242 alloys is had shown that,
The creep-resistant property of alloy can be strengthened by adding appropriate silicon, and possible explanation is because the main deformation mechanism of creep is dislocation
Climb, and under high temperature Si can be formed silicide separated out in dislocation obstruction dislocation climb, so as to improve the creep resistance of alloy
Energy.
D.B.Lee et al.《Mechanical and oxidation properties of Ti–xFe-ySi alloys》
Research finds that Ti-6Al-4V is significantly larger than Ti-Fe-Si alloys in the oxidation rate of 700 degrees Celsius of high temperature above, rational solution
Release is that Si aoxidizes generation SiO at high temperature2, and SiO2Thermal coefficient of expansion and fracture toughness are relatively low, can form thin and compact oxygen
Change layer, improve the inoxidizability of alloy.
Publication No. CN101899590A, entitled a kind of Chinese invention patent of titanium alfer, because composition
In contain aluminium, hot-working character is between the pure titaniums of ASTM and Ti-6Al-4V, and fatigue strength is higher than Ti-6Al-4V.With than with
Toward the more excellent hot-working character of high strength titanium alloy, its tensile strength reaches 1000MPa, suitable with Ti-6Al-4V.Due to closing
Si is free of in gold, its creep-resistant property and high-temperature oxidation resistance are weaker.
The content of the invention
It is an object of the invention to provide inexpensive, the high performance Ti-Al-Fe-Si alloys of one kind, with cheap Fe and Si
Replace the V element of high price, reduce by about 20% cost, while improving performance.
The present invention is to be achieved through the following technical solutions above-mentioned purpose：
One kind is inexpensive, high strength titanium ferro-aluminum silicon alloy, and weight alloy percentage composition is：Al 3-8%, Fe 1-6%, Si
0-2%, N, O, C, H total content are surplus no more than 0.5%, Ti.
The present invention, can compared to Ti-6Al-4V because containing Fe in alloying element, and Fe is a kind of very strong beta stable element
To lift alloy strength in right amount, Ti-6Al-4V alloy basic mechanical performances are shown in Table 1.Adding Si elements simultaneously can form between metal
Compound Ti5Si3, improve the creep-resistant property of alloy, the SiO generated when being aoxidized using Si2Oxide layer, improves alloy high-temp and resists
Oxidisability.
The basic mechanical performance of table 1.Ti-6Al-4V alloys
According to another aspect of the present invention, the invention provides a kind of low cost, high strength titanium alloy preparation method, bag
Include following steps：
The first step：Proportioning sponge Ti, Fe, Al, Al-Si intermediate alloys are carried out according to the predetermined composition of alloy, according to
The material prepared is put into cold crucible vacuum levitation melting stove per ingot 100g or so weight, 2 × 10 are evacuated to-3Pa；To stove
The high-purity argon gas (99.99%) of a certain amount of pressure is inside filled with, argon pressure scope is 0.4~0.6MPa, melting ten minutes.
Second step：By all alloys together melting 3~4 times, well mixed Ti-Al-Fe-Si alloy button ingots are obtained.
3rd step：The alloy pig cast is forged into rod embryo, Φ 12mm bar is made through over mechanical processing.
4th step：Obtained bar is annealed for 2 hours in 790 DEG C of insulations.
5th step：Bar through Overheating Treatment is subjected to extension test and creep test, corresponding mechanical property is obtained and compacted
Become performance.
Compared with prior art the invention has the advantages that：
The present invention improves 10% intensity, reduced while ensureing that alloy ductility is suitable with Ti-6Al-4V alloys
20% cost, enhances the creep-resistant property of alloy.
Embodiment
To make the object, technical solutions and advantages of the present invention of greater clarity, with reference to embodiment, to this
Invention is further described.It should be understood that these descriptions are merely illustrative, and it is not intended to limit the scope of the present invention.
Embodiment 1
The present invention prepares the purity such as table 2 of each metal constituent element of titanium ferro-aluminum silicon alloy selection, alloying component percentage by weight
Constitute and be：Al 8%, Fe 2%, Si 0.5%, N, O, C, H total content is surplus no more than 0.5%, Ti.
Proportioning sponge Ti, Fe, Al, Al-Si intermediate alloys are carried out according to the predetermined composition of alloy, according to every ingot 100g
The material prepared is put into cold crucible vacuum levitation melting stove by the weight of left and right, is evacuated to 2 × 10-3Pa；One is filled with into stove
The high-purity argon gas (99.99%) of quantitative pressure, argon pressure scope is 0.4~0.6MPa, melting ten minutes.
By all alloys together melting 3~4 times, well mixed alloy button ingot is obtained.
The alloy pig cast is forged into rod embryo, Φ 12mm bar is made through over mechanical processing.
Obtained bar is annealed for 2 hours in 790 DEG C of insulations, the mechanical properties and elongation at break to alloy are distinguished
For 1120MPa and 1.5%.
Table 2 prepares the purity (%) that master alloy ingot selects metal constituent element
Embodiment 2
Inexpensive, the high strength titanium ferro-aluminum silicon alloy obtained using method same as Example 1, it is characterised in that weight
Percentage composition is：Al 6%, Fe 1%, Si 0.25%, N, O, C, H total content is surplus no more than 0.5%, Ti.
Proportioning sponge Ti, Fe, Al, Al-Si intermediate alloys are carried out according to the predetermined composition of alloy, according to every ingot 100g
The material prepared is put into cold crucible vacuum levitation melting stove by the weight of left and right, is evacuated to 2 × 10-3Pa；One is filled with into stove
The high-purity argon gas (99.99%) of quantitative pressure, argon pressure scope is 0.4~0.6MPa, melting ten minutes.
By all alloying components together melting 3~4 times, well mixed alloy button ingot is obtained.
The alloy pig cast is forged into rod embryo, Φ 12mm bar is made through over mechanical processing.
Obtained bar is annealed for 2 hours in 790 DEG C of insulations, the mechanical properties and elongation at break point of alloy are obtained
Wei not 1080MPa and 13.1%.Creep test is done under 500 DEG C, 85MPa pulling force, its creep rate is 1.56 × 10-4%.
Embodiment 3
Inexpensive, the high strength titanium ferro-aluminum silicon alloy obtained using method same as Example 1, it is characterised in that weight
Percentage composition is：Al 4%, Fe 4%, Si 2%, N, O, C, H total content is surplus no more than 0.5%, Ti.
Proportioning sponge Ti, Fe, Al, Al-Si intermediate alloys are carried out according to the predetermined composition of alloy, according to every ingot 100g
The material prepared is put into cold crucible vacuum levitation melting stove by the weight of left and right, is evacuated to 2 × 10-3Pa；One is filled with into stove
The high-purity argon gas (99.99%) of quantitative pressure, argon pressure scope is 0.4~0.6MPa, melting ten minutes.
By all alloying components together melting 3~4 times, well mixed alloy button ingot is obtained.
The alloy pig cast is forged into rod embryo, Φ 12mm bar is made through over mechanical processing.
Obtained bar is annealed for 2 hours in 790 DEG C of insulations, the mechanical properties and elongation at break point of alloy are obtained
Wei not 960MPa and 3.5%.
Embodiment 4
Inexpensive, the high strength titanium ferro-aluminum silicon alloy obtained using method same as Example 1, it is characterised in that weight
Percentage composition is：Al 3%, Fe 6%, Si 0.1%, N, O, C, H total content is surplus no more than 0.5%, Ti.
Proportioning sponge Ti, Fe, Al, Al-Si intermediate alloys are carried out according to the predetermined composition of alloy, according to every ingot 100g
The material prepared is put into cold crucible vacuum levitation melting stove by the weight of left and right, is evacuated to 2 × 10-3Pa；One is filled with into stove
The high-purity argon gas (99.99%) of quantitative pressure, argon pressure scope is 0.4~0.6MPa, melting ten minutes.
By all alloying components together melting 3~4 times, well mixed alloy button ingot is obtained.
The alloy pig cast is forged into rod embryo, Φ 12mm bar is made through over mechanical processing.
Obtained bar is annealed for 2 hours in 790 DEG C of insulations, the mechanical properties and elongation at break point of alloy are obtained
Wei not 980MPa and 14.5%.Creep test is done under 500 DEG C, 85MPa pulling force, its creep rate is 1.35 × 10-4%.
Experiment proves that Ti-6Al-4Fe-0.25Si intensity reaches 1080MPa, and intensity slightly has lifting compared with Ti-6Al-4V, its
Elongation at break is 13.1%, and Ti-6Al-4V is quite, and hot-working character is close with its.Ti-4Al-2Fe-0.1Si alloys
Intensity is 980MPa, and Ti-6Al-4V close, but elongation at break is 14.5%, is increased compared with Ti-6Al-4V, heat plus
Work better performances, and creep rate more 1.35 × 10-4%, less than the 1.56 × 10 of Ti-6Al-4Fe-0.25Si-4%, more
Less than Ti-6Al-4V, creep-resistant property preferably, is adapted to apply under the hot environment of part.The present invention is primarily to reduction titanium
The cost of alloy, makes its usage amount further expand, especially in the higher environment of operating temperature.
Although embodiments of the present invention are described in detail, it should be understood that, without departing from the present invention's
In the case of spirit and scope, embodiments of the present invention can be made with various changes, replace and change.
Claims (1)
1. a kind of low cost, the preparation method of high strength titanium ferro-aluminum silicon alloy, it is characterised in that：Comprise the following steps：
The first step：Proportioning sponge Ti, Fe, Al, Al-Si intermediate alloys are carried out according to the predetermined composition of alloy, according to every ingot
The material prepared is put into cold crucible vacuum levitation melting stove by 100g or so weight, is evacuated to 2 × 10-3Pa；Filled into stove
Enter the high-purity argon gas of a certain amount of pressure, argon pressure scope is 0.4~0.6MPa, melting ten minutes；
Second step：By all alloys together melting 3~4 times, well mixed Ti-Al-Fe-Si alloy button ingots are obtained；
3rd step：The alloy pig cast is forged into rod embryo, Φ 12mm bar is made through over mechanical processing；
4th step：Obtained bar is annealed for 2 hours in 790 DEG C of insulations；
5th step：Bar through Overheating Treatment is subjected to extension test and creep test, corresponding mechanical property and creep properties is obtained
Energy；
The alloy is with weight percentage, and by Al 3%, Fe 6%, Si 0.1%, N, O, C, H total content are no more than 0.5%, Ti
Constituted for surplus；The titanium elements are provided by sponge Ti, and ferro element is provided by Fe offers, element silicon by Al-Si intermediate alloys,
Aluminium element is provided by Al and Al-Si intermediate alloys, and Al-Si intermediate alloys used are Al60Si40.
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| CN105088014B (en) * | 2015-09-15 | 2017-04-05 | 北京工业大学 | A kind of low-cost high-strength Ti Fe alloy blanks and its preparation technology |
| CN105624466A (en) * | 2016-01-26 | 2016-06-01 | 安徽同盛环件股份有限公司 | Thin-wall titanium alloy ring piece and forging molding method thereof |
| CN107723514B (en) * | 2017-10-14 | 2019-09-20 | 河北纵横集团丰南钢铁有限公司 | A kind of titanium alloy plate |
| CN108149064A (en) * | 2017-12-19 | 2018-06-12 | 燕山大学 | A kind of high-strength high-plastic titanium ferro-aluminum silicon-carbon alloy |
| CN109487120B (en) * | 2018-12-07 | 2021-01-01 | 中国石油天然气集团有限公司 | Titanium alloy for graphene-reinforced 1200 MPa-grade titanium alloy drill rod and pipe manufacturing method thereof |
| CN109778049A (en) * | 2019-03-04 | 2019-05-21 | 南京理工大学 | A method of preparing titan alloy casting ingot |
| CN110846534A (en) * | 2019-11-05 | 2020-02-28 | 西安西工大超晶科技发展有限责任公司 | Low-cost medium-high-strength titanium alloy material and preparation method of bar thereof |
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Application publication date: 20150805 Assignee: Jiangsu Xiangyun Titanium Alloy New Materials Co.,Ltd. Assignor: NANJING University OF TECHNOLOGY Contract record no.: X2024980000992 Denomination of invention: A high-strength Ti Al Fe Si alloy and its preparation method Granted publication date: 20170815 License type: Common License Record date: 20240119 |
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