CN104532057B - A kind of Ti6242 titanium alloy and the preparation method of small-sized bar thereof - Google Patents
A kind of Ti6242 titanium alloy and the preparation method of small-sized bar thereof Download PDFInfo
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Abstract
The invention discloses a kind of Ti6242 titanium alloy, it is made up of following component according to mass percent: Al5.5～6.5%, Sn1.8～2.2%, Zr3.6～4.4%, Mo1.8～2.2%, Si0.06～0.1%, Fe≤0.1%, O≤0.15%, C≤0.05%, N≤0.05%, remaining is titanium and inevitable impurity element；The preparation method of its small-sized bar is: cogging forging obtains the blank that as-cast structure tentatively crushes, carry out 7 fire forgings again and obtain the blank tissue that crystal grain is fully broken and uniformly refines, carry out 2～3 fire forgings the most again and obtain casting skin bar, be finally thermally treated resulting in finished product bar.The present invention solves the problem of the structural homogenity difference in bar edge and heart portion, obtains the blade of aviation engine Ti6242 titanium alloy rod bar of Φ 20～Φ 100mm small dimension, organizes high-homogenized, and flaw detection is good.
Description
Technical field
The invention belongs to technical field of nonferrous metal processing, the present invention relates to a kind of Ti6242 titanium alloy,
The invention still further relates to the preparation method of a kind of Ti6242 titanium alloy small-sized bar.
Background technology
Ti6242 titanium alloy nominal composition is Ti-6Al-2Sn-4Zr-2Mo-0.1Si, and this alloy is a kind of high
The nearly α type high-temperature titanium alloy of creep resistance, uses temperature at 470 DEG C～550 DEG C, is mainly used in aviation
On the high-pressure compressor dish of electromotor and blade.
Abroad, the aviation that this alloy has been successfully applied to F414, F119, TRENT800 etc. advanced is sent out
In motivation.It may be said that in 470 DEG C～550 DEG C of intervals, this Alloyapplication widely, is that one becomes very much
Ripe aero-engine high-temperature titanium alloy.
At home, along with Advanced Aircraft, the development of especially commercial big aircraft, aero-engine is pushed away
Anharmonic ratio requires to improve constantly to the blade metallurgical imperfection of Ti6242 titanium alloy small-sized bar, group
Knit uniformity, noise level, mechanical property and batch and be stably proposed higher requirement, and to obtain
Requirements above, precondition seeks to obtain high uniformity and the stabilisation of tissue.
Summary of the invention
It is an object of the invention to provide a kind of Ti6242 titanium alloy.
It is a further object to provide the preparation method of a kind of Ti6242 titanium alloy small-sized bar,
The problem solving bar structural homogenity difference prepared by existing method.
The technical solution adopted in the present invention is: a kind of Ti6242 titanium alloy, according to mass percent by
Following component forms: Al 5.50%～6.50%, Sn 1.80%～2.20%, Zr 3.60%～4.40%,
Mo1.80%～2.20%, Si 0.06%～0.1%, Fe≤0.10%, O≤0.15%, C≤0.05%,
N≤0.05%, remaining is titanium and inevitable impurity element.
Another technical scheme of the present invention is: a kind of Ti6242 titanium alloy small-sized bar
Preparation method, specifically includes following steps:
Step 1: cogging is forged
By Ti6242 titan alloy casting ingot 150 DEG C～200 DEG C of heating and thermal insulations more than transformation temperature, forge during forging
Ratio controls between 1.2～1.6, obtains the blank that as-cast structure tentatively crushes；
Step 2: intermediate blank is forged
The blank that the as-cast structure obtained after step 1 cogging being forged tentatively crushes carries out 7 fire forgings,
More than 40 DEG C～transformation temperature below transformation temperature 100 DEG C of heating and thermal insulations, forging ratio during upsetting pull control 1.3～
Between 1.7, deformation amount controlling when directly pulling out between 25%～45%, final forging temperature control 850 DEG C with
On, obtain the blank tissue that crystal grain is fully broken and uniformly refines；
Step 3: finished product forges
The blank tissue that the crystal grain obtained after step 2 intermediate blank being forged fully crushes and uniformly refines, then
Carry out 2～3 fire forgings, 40 DEG C of heating below 60 DEG C～transformation temperature, deformation amount controlling below transformation temperature
More than 40%, final forging temperature controls, more than 800 DEG C, to obtain casting skin bar；
Step 4: heat treatment
Casting skin bar step 3 obtained is annealed and strips off the skin, and obtains Ti6242 titanium alloy small-sized
Bar.
The feature of the present invention also resides in,
In step 1, temperature retention time is 240～480min.
In step 1, Ti6242 titan alloy casting ingot is use vacuum consumable electrode arc furnace to produce 3～5 tonnes
Ti6242 titan alloy casting ingot.
In step 1, Ti6242 titan alloy casting ingot is made up of following component according to mass percent: Al
5.50%～6.50%, Sn 1.80%～2.20%, Zr 3.60%～4.40%, Mo 1.80%～2.20%,
Si 0.06%～0.1%, Fe≤0.10%, O≤0.15%, C≤0.05%, N≤0.05%, remaining be titanium and
Inevitably impurity element.
In step 2, temperature retention time is 120～420min.
In step 3, temperature retention time is 60～180min.
In step 4, annealing process is 970 DEG C～990 DEG C/1h, air cooling+595 DEG C/8h, air cooling.
A diameter of Φ 20～Φ 100mm of finished product bar in step 4.
The invention has the beneficial effects as follows: the preparation side of the present invention a kind of Ti6242 titanium alloy small-sized bar
Method, the problem being pulled out the structural homogenity difference solving bar edge and heart portion by the forging repeatedly of many fire time, gram
Take the technical bottleneck affecting flaw detection level, obtain the aero-engine leaf of Φ 20～Φ 100mm small dimension
Sheet Ti6242 titanium alloy rod bar, organizes high-homogenized, and flaw detection is good.
Accompanying drawing explanation
Fig. 1 is the Φ 100mm specification Ti6242 titanium alloy rod bar 1/2R of the embodiment of the present invention 1 preparation
The microscopic structure picture at place；
Fig. 2 is at the Φ 60mm specification Ti6242 titanium alloy rod bar 1/2R of the embodiment of the present invention 2 preparation
Microscopic structure picture；
Fig. 3 is at the Φ 20mm specification Ti6242 titanium alloy rod bar 1/2R of the embodiment of the present invention 3 preparation
Microscopic structure picture.
Detailed description of the invention
The present invention is described in detail with detailed description of the invention below in conjunction with the accompanying drawings.
One Ti6242 titanium alloy of the present invention, is made up of following component according to mass percent: Al
5.50%～6.50%, Sn 1.80%～2.20%, Zr 3.60%～4.40%, Mo1.80%～2.20%,
Si 0.06%～0.1%, Fe≤0.10%, O≤0.15%, C≤0.05%, N≤0.05%, remaining be titanium and
Inevitably impurity element, each component mass percent sum is 100%.
The preparation method of above-mentioned Ti6242 titanium alloy small-sized bar, specifically includes following steps:
Step 1: cogging is forged
By 150 DEG C～the 200 DEG C heating more than transformation temperature of Ti6242 titan alloy casting ingot, temperature retention time 240～
480min, during forging, forging ratio controls, between 1.2～1.6, to obtain the blank that as-cast structure tentatively crushes；
Ti6242 titan alloy casting ingot is the 3～5 tonnes of Ti6242 titanium alloy castings using vacuum consumable electrode arc furnace to produce
Ingot, is made up of following component according to mass percent: Al 5.50%～6.50%, Sn 1.80%～2.20%,
Zr 3.60%～4.40%, Mo 1.80%～2.20%, Si 0.06%～0.1%, Fe≤0.10%, O≤0.15%,
C≤0.05%, N≤0.05%, remaining is titanium and inevitable impurity element；
Step 2: intermediate blank is forged
The blank that the as-cast structure obtained after step 1 cogging being forged tentatively crushes carries out 7 fire forgings,
More than 40 DEG C～transformation temperature below transformation temperature 100 DEG C of heating, temperature retention time 120～420min, upsetting pull
Forging ratio controls between 1.3～1.7, the deformation amount controlling directly pulled out between 25%～45%, final forging temperature
Control more than 850 DEG C, obtain the blank tissue that crystal grain is fully broken and uniformly refines；
Step 3: finished product forges
The crystal grain obtained after step 2 intermediate blank being forged blank that is fully broken and that uniformly refine is carried out again
2～3 fire forgings, 40 DEG C of heating below 60 DEG C～transformation temperature below transformation temperature, temperature retention time 60～
180min, deformation amount controlling is more than 40%, and final forging temperature controls more than 800 DEG C, obtains casting skin rod
Material.
Step 4: heat treatment
Casting skin bar step 3 obtained is annealed and strips off the skin, annealing process be 970 DEG C～
990 DEG C/1h, air cooling+595 DEG C/8h, air cooling, obtain the Ti6242 titanium of a diameter of Φ 20～Φ 100mm
Alloy bar material.
The present invention provides the blade of aviation engine Ti6242 titanium alloy of a kind of tissue height homogenization little
The preparation method of scale rod bar, the forging repeatedly of many fire time is pulled out and is successfully solved bar edge and the tissue in heart portion
Uniformity and tissue anisotropic problem, with the Ti6242 titanium alloy bar of domestic other manufacturer production at present
Material is compared, the macrostructure of Ti6242 titanium alloy rod bar prepared by this method without obvious metallurgical imperfection,
Even tissue, in fuzzy crystalline substance.
Embodiment 1
Cogging is forged: by 3 tonnes of Ti6242 titan alloy casting ingots after 1190 DEG C of heating, insulation 240min,
Carrying out a upsetting one to pull out, forging ratio controls about 1.4, and final forging temperature controls more than 950 DEG C, to avoid
Surface and the heart portion temperature difference are big, cause uneven microstructure, obtain the blank that as-cast structure tentatively crushes；Wherein,
Ti6242 titan alloy casting ingot, is made up of following component according to mass percent: Al 5.50%, Sn 2.20%,
Zr 4.0%, Mo 2.20%, Si 0.08%, Fe≤0.10%, O≤0.15%, C≤0.05%, N≤0.05%,
Remaining is titanium and inevitable impurity element；
Intermediate blank is forged: the blank tentatively crushed by the as-cast structure obtained carries out 7 fire forgings.1 fire
Heating-up temperature is 1100 DEG C, carries out two upsettings two and pull out after insulation 3.5h；The heating-up temperature of 2 fire is 1050 DEG C,
Carry out two upsettings two after insulation 4h to pull out；3 fire heating-up temperatures are 990 DEG C, carry out two upsettings two and pull out after insulation 4h；
4 fire heating-up temperatures are 980 DEG C, carry out two upsettings two and pull out after insulation 4h；5 fire heating-up temperatures are 980 DEG C,
After insulation 4h, direct drawing out is to square 300mm；The heating-up temperature of 6 fire is 970 DEG C, straight after insulation 3.5h
Connect pulling and arrive side 230mm；7 fire heating-up temperatures are 970 DEG C, carry out direct drawing out to side after insulation 2.5h
170mm.Controlling about 1.7 with the forging ratio of the 4 every fire time of fire of going forward, final forging temperature controls
850 DEG C～900 DEG C；5th, 6, the deformation amount controlling of 7 fire between 35%～45%, final forging temperature controls
More than 850 DEG C, obtain the blank tissue that crystal grain is fully broken and uniformly refines；
Finished product forges: the crystal grain obtained blank that is fully broken and that uniformly refine carries out 2 fire forgings again.1
The heating-up temperature of fire is 960 DEG C, directly falls circle and arrive Φ 160mm after insulation 2h；The heating temperature of 2 fire
Degree is 960 DEG C, and after insulation 2h, direct finish forge is to the casting skin bar of Φ 110mm.The change of above 2 fire time
Shape amount controls more than 40%, and final forging temperature controls more than 800 DEG C.
The Ti6242 titanium alloy rod bar of Φ 100mm is become after casting skin bar is annealed and lathe strips off the skin.
Annealing process: 980 DEG C/1h, air cooling+595 DEG C/8h, air cooling.
Result of detection: meet AMS2628AA level requirement.
The mechanical property of the Φ 100mm specification Ti6242 titanium alloy rod bar of table 1 embodiment of the present invention 1 preparation
The mechanical property of the Φ 100mm specification Ti6242 titanium alloy rod bar prepared as can be seen from Table 1 is equal
Meet standard-required, and have bigger surplus.Fig. 1 is Ti6242 titanium alloy Φ 100mm specification rod
Material mirco structure figure, it can be seen that bar mirco structure is uniform, meets standard MAS1457
Requirement to tissue.
Embodiment 2
Cogging is forged: by 4 tonnes of Ti6242 titan alloy casting ingots after 1170 DEG C of heating, insulation 360min,
Carrying out a upsetting one to pull out, forging ratio controls about 1.2.Final forging temperature controls more than 950 DEG C, to avoid
Surface and the heart portion temperature difference are big, cause uneven microstructure, obtain the blank that as-cast structure tentatively crushes；Wherein,
Ti6242 titan alloy casting ingot, is made up of following component according to mass percent: Al 6.50%, Sn 2.0%,
Zr 3.60%, Mo 2.0%, Si 0.1%, Fe≤0.10%, O≤0.15%, C≤0.05%, N≤0.05%,
Remaining is titanium and inevitable impurity element；
Intermediate blank is forged: the blank tentatively crushed by the as-cast structure obtained carries out 7 fire forgings.1 fire
Heating-up temperature is 1100 DEG C, carries out two upsettings two and pull out after insulation 7h；The heating-up temperature of 2 fire is 1070 DEG C,
Carry out two upsettings two after insulation 3.5h to pull out；3 fire heating-up temperatures are 990 DEG C, carry out two upsettings two and pull out after insulation 6h；
4 fire heating-up temperatures are 990 DEG C, carry out direct drawing out to square 300mm after insulation 4h；5 fire heating-up temperatures
It is 990 DEG C, carries out direct drawing out after insulation 3.5h to square 230mm；The heating-up temperature of 6 fire is 980 DEG C,
Direct drawing out is carried out to square 170mm after insulation 2.5h；7 fire heating-up temperatures are 980 DEG C, after insulation 2h
Directly fall circle and arrive Φ 160mm.Control about 1.5 with the forging ratio of the 3 every fire time of fire of going forward, finish-forging
Temperature controls at 850 DEG C～900 DEG C；4th, 5,6, the deformation amount controlling of 7 fire between 25%～35%,
Final forging temperature controls more than 850 DEG C, obtains the blank tissue that crystal grain is fully broken and uniformly refines；
Finished product forges: the crystal grain obtained blank that is fully broken and that uniformly refine carries out 2 fire forgings again.1
The heating-up temperature of fire is 960 DEG C, carries out direct finish forge to Φ 85mm after insulation 3h；The heating temperature of 2 fire
Degree is 950 DEG C, carries out the direct finish forge casting skin bar to Φ 65mm after insulation 3h.Above 2 fire time
Deformation amount controlling is more than 50%, and final forging temperature controls more than 800 DEG C.
The Ti6242 titanium alloy rod bar of Φ 60mm is become after casting skin bar is annealed and lathe strips off the skin.
Annealing process: 990 DEG C/1h, air cooling+595 DEG C/8h, air cooling.
Result of detection: meet AMS2628AA level requirement.
The mechanical property of the Φ 60mm specification Ti6242 titanium alloy rod bar of table 2 embodiment of the present invention 2 preparation
The mechanical property of the Φ 60mm specification Ti6242 titanium alloy rod bar prepared as can be seen from Table 2 is the fullest
Foot standard-required, and have bigger surplus.Fig. 2 is that Ti6242 titanium alloy Φ 60mm scale rod bar is high
Times organization charts, it can be seen that bar mirco structure is uniform, meets standard MAS1457 to group
The requirement knitted.
Embodiment 3
Cogging is forged: by 5 tonnes of Ti6242 titan alloy casting ingots after 1150 DEG C of heating, insulation 480min,
Carrying out a upsetting one to pull out, forging ratio controls about 1.6.Final forging temperature controls more than 950 DEG C, to avoid
Surface and the heart portion temperature difference are big, cause uneven microstructure, obtain the blank that as-cast structure tentatively crushes；Wherein,
Ti6242 titan alloy casting ingot, is made up of following component according to mass percent: Al 6.0%, Sn 1.80%,
Zr 4.40%, Mo 1.80%, Si 0.06%, Fe≤0.10%, O≤0.15%, C≤0.05%, N≤0.05%,
Remaining is titanium and inevitable impurity element；
Intermediate blank is forged: the blank tentatively crushed by the as-cast structure obtained carries out 7 fire forgings.1 fire
Heating-up temperature is 1100 DEG C, carries out two upsettings two and pull out after insulation 4h；The heating-up temperature of 2 fire is 1070 DEG C,
Carry out two upsettings two after insulation 3.5h to pull out；3 fire heating-up temperatures are 990 DEG C, carry out two upsettings two and pull out after insulation 4h；
4 fire heating-up temperatures are 990 DEG C, carry out direct drawing out to square 300mm after insulation 4h；5 fire heating-up temperatures
It is 990 DEG C, carries out direct drawing out after insulation 3.5h to square 230mm；The heating-up temperature of 6 fire is 980 DEG C,
Direct drawing out is carried out to square 170mm after insulation 2.5h；7 fire heating-up temperatures are 980 DEG C, after insulation 2h
Directly fall circle and arrive Φ 160mm.Control about 1.3 with the forging ratio of the 3 every fire time of fire of going forward, finish-forging
Temperature controls at 850 DEG C～900 DEG C；4th, 5,6, the deformation amount controlling of 7 fire between 30%～40%,
Final forging temperature controls more than 850 DEG C, obtains the blank tissue that crystal grain is fully broken and uniformly refines；
Finished product forges: the crystal grain obtained blank that is fully broken and that uniformly refine carries out 3 fire forgings again.1
The heating-up temperature of fire is 960 DEG C, carries out direct finish forge to Φ 85mm after insulation 2h；The heating temperature of 2 fire
Degree is 950 DEG C, carries out direct finish forge to Φ 55mm after insulation 2h；The heating-up temperature of 3 fire is 950 DEG C,
The direct finish forge casting skin bar to Φ 25mm is carried out after insulation 1h.The deformation amount controlling of above 3 fire time exists
More than 50%, final forging temperature controls more than 800 DEG C.
The Ti6242 titanium alloy rod bar of Φ 20mm is become after casting skin bar is annealed and lathe strips off the skin.
Annealing process: 970 DEG C/1h, air cooling+595 DEG C/8h, air cooling.
Result of detection: meet AMS2628AA level requirement.
The mechanical property of the Φ 20mm specification Ti6242 titanium alloy rod bar of table 3 embodiment of the present invention 3 preparation
The mechanical property of the Φ 20mm specification Ti6242 titanium alloy rod bar prepared as can be seen from Table 3 is the fullest
Foot standard-required, and have bigger surplus.Fig. 3 is that Ti6242 titanium alloy Φ 20mm scale rod bar is high
Times organization charts, it can be seen that bar mirco structure is uniform, meets standard MAS1457 to group
The requirement knitted.
Claims (4)
1. the preparation method of a Ti6242 titanium alloy small-sized bar, it is characterised in that specifically include with
Lower step:
Step 1: cogging is forged
By Ti6242 titan alloy casting ingot 150 DEG C～200 DEG C of heating and thermal insulations, temperature retention time more than transformation temperature
Being 240～480min, during forging, forging ratio controls, between 1.2～1.6, to obtain as-cast structure the most broken
Blank；
Step 2: intermediate blank is forged
The blank that the as-cast structure obtained after step 1 cogging being forged tentatively crushes carries out 7 fire forgings,
More than 40 DEG C～transformation temperature below transformation temperature 100 DEG C of heating and thermal insulations 120～420min, forging ratio during upsetting pull
Control between 1.3～1.7, deformation amount controlling when directly pulling out between 25%～45%, final forging temperature control
System, more than 850 DEG C, obtains the blank tissue that crystal grain is fully broken and uniformly refines；
Step 3: finished product forges
The blank tissue that the crystal grain obtained after step 2 intermediate blank being forged fully crushes and uniformly refines, then
Carrying out 2～3 fire forgings, 40 DEG C of heating below 60 DEG C～transformation temperature below transformation temperature, temperature retention time is
60～180min, deformation amount controlling is more than 40%, and final forging temperature controls, more than 800 DEG C, to obtain black
Skin bar；
Step 4: heat treatment
Casting skin bar step 3 obtained is annealed and strips off the skin, and annealing process is 970 DEG C～990 DEG C/1h,
Air cooling+595 DEG C/8h, air cooling, obtain Ti6242 titanium alloy small-sized bar.
The preparation method of a kind of Ti6242 titanium alloy small-sized bar the most as claimed in claim 1, it is special
Levy and be, in described step 1 Ti6242 titan alloy casting ingot be use vacuum consumable electrode arc furnace produce 3～
5 tonnes of Ti6242 titan alloy casting ingots.
The preparation method of a kind of Ti6242 titanium alloy small-sized bar the most as claimed in claim 1, it is special
Levying and be, in described step 1, Ti6242 titan alloy casting ingot is made up of following component according to mass percent:
Al 5.50%～6.50%, Sn 1.80%～2.20%, Zr 3.60%～4.40%, Mo 1.80%～2.20%,
Si 0.06%～0.1%, Fe≤0.10%, O≤0.15%, C≤0.05%, N≤0.05%, remaining be titanium and
Inevitably impurity element.
The preparation method of a kind of Ti6242 titanium alloy small-sized bar the most as claimed in claim 1, it is special
Levy and be, a diameter of Φ 20～Φ 100mm of finished product bar in described step 4.
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| CN105057521B (en) * | 2015-07-28 | 2017-04-12 | 西部超导材料科技股份有限公司 | Preparation method of TA5-A alloy large-size loop blank |
| CN105039886B (en) * | 2015-08-05 | 2017-02-01 | 西部超导材料科技股份有限公司 | Method for preparing Zr-2.5Nb alloy rod with uniform small structure phase |
| CN105179299B (en) * | 2015-09-15 | 2018-09-04 | 宁波龙旋机械制造有限公司 | A kind of fan coupler compound film sheet group and preparation method thereof |
| CN106363021B (en) * | 2016-08-30 | 2018-08-10 | 西部超导材料科技股份有限公司 | A kind of milling method of 1500MPa grades of titanium alloy rod bar |
| CN106670374A (en) * | 2016-12-01 | 2017-05-17 | 贵州安大航空锻造有限责任公司 | Near-isothermal forging forming method for Ti6242 titanium alloy hollow shaft journal forged piece |
| CN106734796B (en) * | 2016-12-14 | 2018-11-06 | 西部超导材料科技股份有限公司 | The forging method of engine high temperature resistant titanium alloy large scale rod bar |
| CN108004430A (en) * | 2017-11-29 | 2018-05-08 | 成都创客之家科技有限公司 | A kind of titanium alloy metallic fiber for preparing filter core |
| CN109234568B (en) * | 2018-09-26 | 2021-07-06 | 西部超导材料科技股份有限公司 | Preparation method of Ti6242 titanium alloy large-size bar |
| CN109946947A (en) * | 2019-05-08 | 2019-06-28 | 东莞得利钟表有限公司 | A kind of black titanium clock and watch gadget of high-strength corrosion-resistant and its manufacture craft |
| CN113118349B (en) * | 2019-12-30 | 2022-09-20 | 西北工业大学 | Preparation method of Ti6242 titanium alloy large-thickness cake blank |
| CN112322933B (en) * | 2020-10-15 | 2021-09-28 | 东北大学 | High-performance near-alpha high-temperature titanium alloy and powder metallurgy preparation method thereof |
| CN113755709B (en) * | 2021-09-10 | 2022-06-24 | 西北有色金属研究院 | Preparation method of Ti80 titanium alloy bar with high impact toughness |
| CN113943877A (en) * | 2021-10-18 | 2022-01-18 | 忠世高新材料股份有限公司 | Preparation method of Ti6242s alloy cast ingot |
| CN116516273A (en) * | 2023-05-25 | 2023-08-01 | 宝鸡西工钛合金制品有限公司 | Multiple annealing treatment process suitable for Ti6242 alloy blade |
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| CN101928859B (en) * | 2009-12-09 | 2012-01-25 | 北京有色金属研究总院 | Titanium alloy with high impact toughness and preparation method thereof |
| CN102230097B (en) * | 2011-03-31 | 2012-06-27 | 西北有色金属研究院 | Preparation method of titanium alloy bars |
| CN102941257B (en) * | 2012-11-23 | 2014-12-17 | 贵州安大航空锻造有限责任公司 | Blanking-making method achieved by bending section bar of alpha-beta two-phase titanium alloy thin-wall ring piece |
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