CN107283124A - A kind of method without jacket hot-working TiAl alloy - Google Patents
A kind of method without jacket hot-working TiAl alloy Download PDFInfo
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- CN107283124A CN107283124A CN201710502234.XA CN201710502234A CN107283124A CN 107283124 A CN107283124 A CN 107283124A CN 201710502234 A CN201710502234 A CN 201710502234A CN 107283124 A CN107283124 A CN 107283124A
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- cylinder
- tial alloy
- forging
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- potassium titanate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Mechanical Engineering (AREA)
- Forging (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The present invention relates to TiAl alloy forging method.A kind of method without jacket hot-working TiAl alloy, it is 2 that TiAl alloy ingot casting is cut into ratio of height to diameter:1‑1.5:1 cylinder is the upper bottom surface roughness of cylinder in Ra 1.2 0.8；The side surface and two bottom surfaces up and down of cylinder are uniformly applied to using BN emulsifiable pastes；Cylinder is coated for 5 10mm crystal whisker of hexa potassium titanate ceramic fiber blanket using thickness, 1200 DEG C 1250 DEG C is warming up to, is then incubated 30 90min；The cylinder coated with crystal whisker of hexa potassium titanate ceramic fiber blanket is subjected to no canned forging at 700 DEG C 750 DEG C, strain rate is 0.01 0.05s‑1, overall deformation amount is：Deflection is 75% 80%.The present invention reduces jacket soldering and sealing without canned forging, goes the steps such as jacket turning, and technique is simple, and cost is low, it is to avoid waste.
Description
Technical field
The present invention relates to TiAl alloy forging method.
Technical background
As Aeronautics and Astronautics technology high-speed develops, the raising of aircraft and means of transport speed, to lightweight, high-strength high temperature
The performance of structural material proposes higher requirement.TiAl alloy has low, the high specific strength of density and than modulus of elasticity, good
Creep resistant and the outstanding feature such as oxidation resistance, become the material of the great competitiveness of Aeronautics and Astronautics industrial circle.So
And, TiAl alloy as-cast structure is thick, it is necessary to by the further thinning microstructure of thermal processing distortion, improve performance.TiAl alloy heat
Process window is small, and resistance of deformation is big, requires higher to processing temperature, therefore the thermal processing distortion of TiAl alloy generally uses jacket
The techniques such as forging, sheathed extrusion, pack rolling.By the insulation effect of stainless steel capsule, the reduction of temperature is reduced, deformation is improved
Ability.However, the use of stainless steel capsule, not only brings the cumbersome of technique, the production time is added, and bring the wave of resource
Take, further increase production cost.The present invention coats TiAl alloy using crystal whisker of hexa potassium titanate ceramic fiber blanket, and
700 DEG C of -750 DEG C of holding furnaces, reduce the temperature drop of alloy；Using BN self-lubrication ceramic particle emulsifiable pastes as lubricant, reduce
Friction between TiAl alloy and pressure head, improves crystallized ability.It is numerous that the present invention solves process in TiAl alloy forging process
Miscellaneous, the wasting of resources, the low shortcoming of economic benefit makes TiAl alloy directly be carried out on common press without canned forging, improved
Production efficiency, reduces production cost.
The content of the invention
The invention solves the problems that the high shortcoming of existing canned forging TiAl alloy cumbersome, the wasting of resources, production cost,
And a kind of inexpensive method without canned forging TiAl alloy is provided.
The specific steps of this method：
First, it is 1.5 TiAl alloy ingot casting to be cut into high footpath with wire electric discharge:1-2:1 cylinder, such cylinder has
Unstability is not produced in good deformation stability, deformation process.For the cracking for reducing friction with cake surrounding being forged caused by defect,
With lathe by the upper bottom surface car light of cylinder, surface roughness reaches Ra 1.2-0.8.
The 2nd, BN emulsifiable pastes are uniformly applied to the side surface and two bottom surfaces up and down of TiAl alloy, TiAl alloy is prevented
The friction of two bottom surfaces and pressure head above and below high-temperature oxydation and reduction.
3rd, use thickness for 5-10mm crystal whisker of hexa potassium titanate ceramic fiber blanket coat TiAl alloy, and 1200 DEG C-
Heated up at 1250 DEG C with stove, be incubated 30-90min, reduce the temperature drop of TiAl alloy using crystal whisker of hexa potassium titanate ceramic fiber blanket, protected
Demonstrate,prove the deformation temperature of TiAl alloy.
4th, 700 DEG C -750 DEG C are heated on pressing machine table-board by opposite opened, without base resistance furnace, will be protected in step 3
TiAl alloy after temperature is clamped in resistance furnace.With 0.01-0.05s-1Strain rate to TiAl alloy carry out without canned forging,
Deflection is 75%-80%.
The beneficial effects of the invention are as follows：First, the present invention reduces jacket soldering and sealing without canned forging, goes jacket turning etc. to walk
Suddenly, technique is simple, and cost is low, it is to avoid waste；2nd, the present invention is by smearing BN emulsifiable pastes, reduce TiAl ingot and forcing press it
Between friction, improve Deformation structure's uniformity.
Embodiment
Using following verification experimental verifications effect of the present invention：
Experiment one：A kind of technical method of the low cost without canned forging TiAl alloy, is specifically realized by the following steps：
First, alloying component is cut into Gao Jing for Ti-44Al-4Nb-4V-0.3Mo TiAl alloy ingot casting with wire electric discharge
Than for 2：1 cylinder, and with lathe by the upper bottom surface car light of cylinder, surface roughness reaches Ra 1.2.2nd, it is BN emulsifiable pastes is equal
The even side surface for being applied to TiAl alloy and up and down two bottom surfaces.3rd, use thickness fine for 5mm crystal whisker of hexa potassium titanate ceramics
Blanket cladding TiAl alloy is tieed up, and is heated up at 1200 DEG C with stove, 30min is incubated.4th, by opposite opened, no base resistance furnace is in pressure
700 DEG C are heated on power machine table top, preheated TiAl alloy is clamped in resistance furnace, with 0.05s-1Strain rate pair
TiAl alloy is carried out without canned forging, and deflection is 80%.
Ti-44Al-4Nb-4V-0.3Mo is after using the present invention without canned forging, and forging cake surface quality is good.
Experiment two：A kind of technical method of the low cost without canned forging TiAl alloy, is specifically realized by the following steps：
First, composition is cut into ratio of height to diameter for Ti-44Al-8Nb-0.2Mo high Nb containing TiAl based alloy ingot casting with wire electric discharge
No more than 1.5：1 cylinder, and with lathe by the upper bottom surface car light of cylinder, surface roughness reaches Ra0.8.2nd, by BN breasts
Cream is uniformly applied to the side surface and two bottom surfaces up and down of TiAl alloy.3rd, thickness is used for 10mm crystal whisker of hexa potassium titanate
Ceramic fiber blanket coats TiAl alloy, and is heated up at 1250 DEG C with stove, is incubated 90min.4th, by opposite opened, no base resistance
Stove is heated to 750 DEG C on pressing machine table-board, preheated TiAl alloy is clamped in resistance furnace, with 0.01s-1Judgement of speed change
Rate is carried out without canned forging to TiAl alloy, and deflection is 75%.
Ti-44Al-8Nb-0.2Mo with smaller hot processing window, after being carried out using the present invention without canned forging, forges cake
Surface quality is good.
Claims (1)
1. a kind of method without jacket hot-working TiAl alloy：It is characterized in that being carried out according to the steps：
Step one：It is 2 that TiAl alloy ingot casting is cut into ratio of height to diameter:1-1.5:1 cylinder, is that the upper bottom surface of cylinder is thick
Rugosity is in Ra 1.2-0.8；
Step 2: being uniformly applied to the side surface and two bottom surfaces up and down of cylinder using BN emulsifiable pastes；
Step 3: coating cylinder using thickness for 5-10mm crystal whisker of hexa potassium titanate ceramic fiber blanket, 1200 DEG C -1250 is warming up to
DEG C, then it is incubated 30-90min；
Step 4: the cylinder coated with crystal whisker of hexa potassium titanate ceramic fiber blanket is subjected to no canned forging at 700 DEG C -750 DEG C,
Strain rate is 0.01-0.05s-1, overall deformation amount is：Deflection is 75%-80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710502234.XA CN107283124A (en) | 2017-06-27 | 2017-06-27 | A kind of method without jacket hot-working TiAl alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710502234.XA CN107283124A (en) | 2017-06-27 | 2017-06-27 | A kind of method without jacket hot-working TiAl alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107283124A true CN107283124A (en) | 2017-10-24 |
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| CN201710502234.XA Pending CN107283124A (en) | 2017-06-27 | 2017-06-27 | A kind of method without jacket hot-working TiAl alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111790866A (en) * | 2019-04-08 | 2020-10-20 | 中国科学院金属研究所 | Forging method and application of large-size cake blank of non-sheathed TiAl alloy |
| CN111842488A (en) * | 2020-07-06 | 2020-10-30 | 东北大学 | Process method for realizing TiAl alloy uniform fine grain structure based on cross sheath rolling |
| CN114850215A (en) * | 2022-04-27 | 2022-08-05 | 燕山大学 | TiAl alloy plate rolling method and device |
| CN116590637A (en) * | 2023-04-21 | 2023-08-15 | 武汉理工大学 | Method for improving tissue performance of cast TiAl alloy |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03197630A (en) * | 1989-12-25 | 1991-08-29 | Nippon Steel Corp | Method for hot-working intermetallic compound ti-al base alloy |
| CN102533423A (en) * | 2011-12-02 | 2012-07-04 | 华中科技大学 | Non-graphite type lubricant for hot die forging of metal and preparation method of non-graphite type lubricant |
| CN104959506A (en) * | 2015-05-21 | 2015-10-07 | 西部超导材料科技股份有限公司 | Preparation method of hard-deformation non-burning titanium alloy boards |
| CN105779825A (en) * | 2016-03-21 | 2016-07-20 | 太原理工大学 | TiAl alloy self-lubricating material and preparation method thereof |
| CN106636740A (en) * | 2016-11-01 | 2017-05-10 | 太原理工大学 | Method for preparing TiAl alloy plate without canning |
| CN106674885A (en) * | 2016-12-23 | 2017-05-17 | 张家港大塚化学有限公司 | Method for preparing potassium hexatitanate crystal whisker reinforced composite material |
| CN106862447A (en) * | 2017-03-07 | 2017-06-20 | 钢铁研究总院 | A kind of multiway forging method of high-alloying high temperature alloy bar stock/biscuit |
-
2017
- 2017-06-27 CN CN201710502234.XA patent/CN107283124A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03197630A (en) * | 1989-12-25 | 1991-08-29 | Nippon Steel Corp | Method for hot-working intermetallic compound ti-al base alloy |
| CN102533423A (en) * | 2011-12-02 | 2012-07-04 | 华中科技大学 | Non-graphite type lubricant for hot die forging of metal and preparation method of non-graphite type lubricant |
| CN104959506A (en) * | 2015-05-21 | 2015-10-07 | 西部超导材料科技股份有限公司 | Preparation method of hard-deformation non-burning titanium alloy boards |
| CN105779825A (en) * | 2016-03-21 | 2016-07-20 | 太原理工大学 | TiAl alloy self-lubricating material and preparation method thereof |
| CN106636740A (en) * | 2016-11-01 | 2017-05-10 | 太原理工大学 | Method for preparing TiAl alloy plate without canning |
| CN106674885A (en) * | 2016-12-23 | 2017-05-17 | 张家港大塚化学有限公司 | Method for preparing potassium hexatitanate crystal whisker reinforced composite material |
| CN106862447A (en) * | 2017-03-07 | 2017-06-20 | 钢铁研究总院 | A kind of multiway forging method of high-alloying high temperature alloy bar stock/biscuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111790866A (en) * | 2019-04-08 | 2020-10-20 | 中国科学院金属研究所 | Forging method and application of large-size cake blank of non-sheathed TiAl alloy |
| CN111842488A (en) * | 2020-07-06 | 2020-10-30 | 东北大学 | Process method for realizing TiAl alloy uniform fine grain structure based on cross sheath rolling |
| CN111842488B (en) * | 2020-07-06 | 2022-01-18 | 东北大学 | Process method for realizing TiAl alloy uniform fine grain structure based on cross sheath rolling |
| CN114850215A (en) * | 2022-04-27 | 2022-08-05 | 燕山大学 | TiAl alloy plate rolling method and device |
| CN116590637A (en) * | 2023-04-21 | 2023-08-15 | 武汉理工大学 | Method for improving tissue performance of cast TiAl alloy |
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Application publication date: 20171024 |