CN109500331A - TC25 titanium alloy large size bar processing method - Google Patents
TC25 titanium alloy large size bar processing method Download PDFInfo
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- CN109500331A CN109500331A CN201811303267.2A CN201811303267A CN109500331A CN 109500331 A CN109500331 A CN 109500331A CN 201811303267 A CN201811303267 A CN 201811303267A CN 109500331 A CN109500331 A CN 109500331A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
Abstract
The invention discloses a kind of TC25 titanium alloy large size bar processing methods, forge and realize through forging → finished product below raw material selection → ingot casting preparation → above forging of cogging forging → beta transus temperature → recrystallization homogenization heat treatment forging → beta transus temperature.Flat-die forging technique through the invention can prepare the stable TC25 titanium alloy large size bar of uniform chemical component, even tissue, performance, improve the stability of product quality and large-scale production.
Description
Technical field
The present invention provides a kind of TC25 titanium alloy large size bar processing method, belongs to titanium alloy material melting and open die forging
Make technical field.
Background technique
With the development of advanced material technology of preparing and the impact of energy crisis, aerospace industry is to high-intensitive, high
Elasticity modulus, low-density, the demand of new engine material resistant to high temperature are more more and more urgent, therefore new type high temperature titanium alloy becomes
For the research hotspot of countries in the world in recent years.TC25 titanium alloy is developed by the BT25 titanium alloy of Russia, nominal composition
It is a kind of alpha+beta diphasic titanium alloy, 1000 ~ 1040 DEG C of alloy phase change point should for Ti-6.5Al-2Mo-1Zr-1Sn-1W-0.2Si
Alloy high comprehensive performance, and have good mechanical behavior under high temperature and thermal stability concurrently, in 500 DEG C or less working times up to 6000
Hour, in 550 DEG C of working times up to 3000 hours, the use temperature of significantly larger than Ti-6Al-4V.The alloy mainly with bar and
The supply of material of cake material, is applicable in and is used as aero-engine compressor disk and blade material.
For the application for aircraft industry to the application demand of TC25 titanium alloy large size bar, development main specifications is Φ
250 ~ Φ 400mm bar processing technology research realizes the large-scale production of TC25 titanium alloy large size bar, meets China's aviation
The needs of industrial development.
Summary of the invention
It is above-mentioned not yet occur large-scale production TC25 large scale rod bar method in the prior art aiming at the problem that, and due to
In TC25 titanium alloy containing 1% tungsten (W), tungsten is high-melting-point high desnity metal, is easy to form asking of being mingled with of high density in the alloy
Topic, the object of the present invention is to provide the TC25 titanium alloy large size bar processing methods that a kind of diameter is 250 ~ Φ of Φ 400mm, should
Bar is alpha+beta two-phase structure, and chemical component and structural homogenity are good, and mechanical property is higher and highly stable, is suitable for work
Industry metaplasia produces.
To achieve the above object, the technical solution adopted by the present invention: TC25 titanium alloy large size bar processing method, it is special
Sign is, realizes through raw material selection → ingot casting preparation → large scale rod bar flat-die forging.
The preparation method of TC25 titanium alloy large size bar, is realized particular by following steps:
Step 1: raw material selection
Select granularity for the titanium sponge and AlMoWTi alloy of 0.83~12.7mm, Al-Mo alloy, Al, HZr, Ti-Sn alloy,
Al-Si alloy, TiO2These intermediate alloys are as raw material, and wherein W content is 17~20% in AlMoWTi alloy, granularity 0.25
~3mm；
Step 2: ingot casting preparation
Raw material supplying is carried out according to the chemical component each element content of GB/T3620.1 standard requirements, according to vacuum consumable smelting side
Method uses vacuum consumable electrode arc furnace melting three times, and the pressure of last time melting stabilization sub stage is not more than 5Pa, it is uniform to obtain ingredient
TC25 titan alloy casting ingot；
Step 3: cogging forging
More than beta transus temperature under 80 DEG C~150 DEG C of cogging forging temperature, TC25 titan alloy casting ingot is first subjected to 1 fire time
Upsetting pull forging, forging ratio controls between 2.5-3.5, air-cooled after forging；
Then 50 DEG C ~ 70 DEG C more than cogging forging temperature, the upsetting pull for carrying out 1 fire time to blank is forged, and forging ratio control exists
It is air-cooled after forging between 2.5-3.5；
Step 4: more than beta transus temperature forging
Heating temperature carries out the upsetting of 1~2 fire time to the blank handled by step 3 50 DEG C~100 DEG C more than beta transus temperature
Forging is pulled out, every fire time forging ratio control is air-cooled after forging between 2.5-3.5；
Step 5: recrystallization homogenization heat treatment forging
Heating temperature 30 DEG C~50 DEG C below beta transus temperature, forge by the upsetting pull for carrying out 1 fire time to the blank handled by step 4
Make, hot material melts down is heat-treated between 1.4-1.8, after forging for forging ratio control, heat treatment heating temperature be beta transus temperature with
It upper 50 DEG C~100 DEG C, comes out of the stove and forging is pulled out to blank one upsetting one of progress, forging ratio controls between 1.1-1.4, air-cooled after forging；
Step 6: being forged below beta transus temperature
Heating temperature carries out the upsetting pull of 2~3 fire time to the blank handled by step 5 20 DEG C ~ 40 DEG C below beta transus temperature
Forging, every fire time forging ratio control are taken air-cooled between 1.4-1.8, after forging.
Step 7: finished product forging
The forging stock of step (6) is subjected to 2~4 fire time pulling forgings for 30~50 DEG C below transformation temperature, every fire time forging ratio control exists
Between 1.2~2.8, taken after pulling forging air-cooled.
Recrystallization homogenization Heating Time In The Heat Treatment is 200~300min in above-mentioned steps 5.
Further, step 3, the upsetting pull in step 4 are forged to two upsettings two and pull out；Upsetting pull in step 5, step 6 is forged to one
Upsetting one is pulled out.
Compared with prior art, the present invention have the utility model has the advantages that
1, the present invention is utmostly reduced by selecting the AlMoWTi quaternary intermediate alloy of suitable particle size to carry out the addition of W element
High-melting-point refractory metal W bring high density is mingled with the risk that segregation is formed, and ingot chemistry is uniform and stable.
2, the present invention forges the stage in flat-die forging in ingot formation, and the heating temperature of the second fire is higher than the first fire
Temperature can effectively be crushed as-cast structure, refine crystal grain, help to improve the uniformity of tissue.
3, in such a way that recrystallization homogenizes heat treatment forging, i.e., on the basis for completing the following forging deformation of beta transformation point
It is upper directly to carry out beta transformation point or more recrystallization homogenization heat treatment, and carry out the forging of the small deformation amount of beta transformation point or more, energy
It is enough greatly to refine grain structure, improve big blank deformation non-uniformity problem, effectively reduces the processing fire of subsequent two-phase section.
Flat-die forging technique through the invention can prepare the stable TC25 titanium alloy of uniform chemical component, even tissue, performance
Large scale rod bar improves the stability of product quality and large-scale production.
Detailed description of the invention
Fig. 1 is the macrostructure figure of Φ 300mm scale rod bar prepared by the embodiment of the present invention one
Fig. 2 be the embodiment of the present invention one prepare Φ 300mm scale rod bar micro-organization chart (the wherein figure on the left side are as follows: head,
The right figure are as follows: center portion)
Fig. 3 is the macrostructure figure of Φ 400mm scale rod bar prepared by the embodiment of the present invention two
Fig. 4 be the embodiment of the present invention two prepare Φ 400mm scale rod bar micro-organization chart (the wherein figure on the left side are as follows: head,
The right figure are as follows: center portion).
Specific implementation method
Presently in connection with specific embodiment, next the invention will be further elaborated.
Embodiment one:
Step 1, raw material select: choose granularity for 0.83~12.7mm titanium sponge and AlMoWTi alloy (W content is 17~
20%, granularity is 0.25~3mm), Al-60Mo alloy, Al beans, HZr, Ti-80Sn alloy, Al-10Si alloy, TiO2In these
Between alloy as raw material；
Step 2, ingot casting preparation: carrying out raw material supplying according to the element proportion of TC25 in GB/T 3620.1, prepare consutrode,
Vacuum consumable smelting three times is carried out using vacuum consumable smelting method, the pressure of last time melting stabilization sub stage is not more than 5Pa,
Φ 680mm TC25 titan alloy casting ingot is obtained, the beta transus temperature for measuring its ingot casting is 1000 DEG C；
Step 3: cogging forging
Under 1080 DEG C of cogging forging temperature, first the upsetting pull that TC25 titan alloy casting ingot carries out 1 fire time is forged, i.e., 1 fire forging
Heating temperature selects 1080 DEG C, and two upsettings two pull out forging to 600mm, and forging ratio 3.0 is air-cooled after forging；
Then 70 DEG C more than cogging forging temperature, the upsetting pull for carrying out 1 fire time to blank is forged, i.e., 2 fiery Forge Heating temperature choosings
1150 DEG C are selected, two upsettings two pull out forging to 600mm, and forging ratio 3.3 is air-cooled after forging；
Step 4: more than beta transus temperature forging
Heating temperature 80 DEG C more than beta transus temperature, forge by the upsetting pull for carrying out 1 fire time to the blank handled by step 3, i.e., and 3
Fiery Forge Heating temperature selects 1080 DEG C, and two upsettings two pull out forging to 600mm, forging ratio 3.2, using air-cooled after forging；
Step 5: recrystallization homogenization heat treatment forging
Heating temperature 40 DEG C below beta transus temperature, forge by the upsetting pull for carrying out 1 fire time to the blank handled by step 4, i.e., and 4
Fiery Forge Heating temperature selects 960 DEG C, and a upsetting one, which is pulled out, forges to 600mm, and forging ratio 1.6, hot material, which melts down, after forging is heat-treated,
Being heat-treated heating temperature is 1080 DEG C, and heat treatment time is 240 minutes, comes out of the stove and carries out 1 upsetting pull forging, i.e. a upsetting one to blank
Forging is pulled out to 600mm, forging ratio control is air-cooled after 1.1, forging；
Step 6: being forged below beta transus temperature
Heating temperature 30 DEG C below beta transus temperature, forge by the upsetting pull for carrying out 2 fire time to the blank handled by step 5, i.e., and 5
~6 fiery Forge Heating temperature select 970 DEG C, and every fire is that a upsetting one pulls out forging to 600mm, and every fire time forging ratio is 1.6, after forging
Using air-cooled；
Step 7: finished product forging
The forging stock of step (6) is subjected to 4 fire time pulling forgings, i.e., 7~10 fiery Forge Heating temperature choosings for 40 DEG C below transformation temperature
960 DEG C are selected, pulled out, fall circle, every fire time forging ratio 1.7, finally to trimmed size Φ 300mm.
Fig. 1 is to prepare the macrostructure figure that trimmed size is Φ 300mm bar by the forging of this technique, it can be seen that low
Again without apparent metallurgical imperfection, even tissue.Fig. 2 is the edge of corresponding bar and the microscopic structure of center portion, it can be seen that edge
It is highly uniform with the microscopic structure of center portion.
Embodiment two:
Step 1, raw material select: choose granularity for 0.83~12.7mm titanium sponge and AlMoWTi alloy (W content is 17~
20%, granularity is 0.25~3mm), Al-60Mo alloy, Al beans, HZr, Ti-80Sn alloy, Al-10Si alloy, TiO2In these
Between alloy as raw material；
Step 2, ingot casting preparation: carrying out raw material supplying according to the element proportion of TC25 in GB/T 3620.1, prepare consutrode,
Vacuum consumable smelting three times is carried out using vacuum consumable smelting method, the pressure of last time melting stabilization sub stage is not more than 5Pa,
The uniform Φ 680mmTC titan alloy casting ingot of ingredient is obtained, the beta transus temperature for measuring ingot casting is 1005 DEG C；
Step 3: cogging forging
More than beta transus temperature under 105 DEG C of cogging forging temperature, first the upsetting pull that TC25 titan alloy casting ingot carries out 1 fire time is forged
It makes, i.e., 1 fiery Forge Heating temperature selects 1100 DEG C, and two upsettings two pull out forging to 600mm, and forging ratio 2.9 is air-cooled after forging；
Then 55 DEG C more than cogging forging temperature, the upsetting pull for carrying out 1 fire time to blank is forged, i.e., 2 fiery Forge Heating temperature choosings
1160 DEG C are selected, two upsettings two pull out forging to 600mm, and forging ratio 3.2 is air-cooled after forging；
Step 4: more than beta transus temperature forging
Heating temperature 75 DEG C more than beta transus temperature, forge by the upsetting pull for carrying out 1 fire time to the blank handled by step 3, i.e., and 3
Fiery Forge Heating temperature selects 1080 DEG C, and two upsettings two pull out forging to 600mm, forging ratio 3.2, using air-cooled after forging；
Step 5: recrystallization homogenization heat treatment forging
Heating temperature 45 DEG C below beta transus temperature, forge by the upsetting pull for carrying out 1 fire time to the blank handled by step 4, i.e., and 4
Fiery Forge Heating temperature selects 960 DEG C, and a upsetting one pulls out forging to 600mm, and forging ratio 1.7, hot material melts down 1080 DEG C of progress after forging
Heat treatment, heat treatment time 240min are heat-treated one upsetting one of progress of coming out of the stove and pull out forging forging to 600mm, and forging ratio is selected as
1.2, it is air-cooled after forging；
Step 6: being forged below beta transus temperature
Heating temperature 30 DEG C below beta transus temperature, forge by the upsetting pull for carrying out 3 fire time to the blank handled by step 5, i.e., and 5
~7 fiery Forge Heating temperature select 975 DEG C, and every fire is all that a upsetting one pulls out forging to 600mm, and every fire time forging ratio is 1.6, after forging
Using air-cooled.
Step 7: finished product forging
The forging stock of step (6) is subjected to 2 fire time pulling forgings, i.e., 7~8 fiery Forge Heating temperature for 30~50 DEG C below transformation temperature
960 DEG C of selection, is pulled out, every fire time forging ratio 1.7, finally to trimmed size Φ 400mm.
Fig. 3 is to prepare the macrostructure figure that trimmed size is Φ 400mm bar by the forging of this technique, it can be seen that low
Again without apparent metallurgical imperfection, even tissue.Fig. 4 is the edge of corresponding bar and the microscopic structure of center portion, it can be seen that edge
It is highly uniform with the microscopic structure of center portion.
Claims (4)
1.TC25 titanium alloy large size bar processing method, which is characterized in that forged through raw material selection → ingot casting preparation → cogging
Forging → finished product forges and reality below the above forging of → beta transus temperature → recrystallization homogenization heat treatment forging → beta transus temperature
It is existing.
2. TC25 titanium alloy large size bar processing method according to claim 1, which is characterized in that particular by such as
Lower step is realized:
Step 1: raw material selection
Select granularity for the titanium sponge and AlMoWTi alloy of 0.83~12.7mm, Al-Mo alloy, Al, HZr, Ti-Sn alloy,
Al-Si alloy, TiO2These intermediate alloys are as raw material, and wherein W content is 17~20% in AlMoWTi alloy, granularity 0.25
~3mm；
Step 2: ingot casting preparation
Raw material supplying is carried out according to the chemical component each element content of GB/T3620.1 standard requirements, according to vacuum consumable smelting side
Method uses vacuum consumable electrode arc furnace melting three times, and the pressure of last time melting stabilization sub stage is not more than 5Pa, it is uniform to obtain ingredient
TC25 titan alloy casting ingot；
Step 3: cogging forging
More than beta transus temperature under 80 DEG C~150 DEG C of cogging forging temperature, TC25 titan alloy casting ingot is first subjected to 1 fire time
Upsetting pull forging, forging ratio controls between 2.5-3.5, air-cooled after forging；
Then 50 DEG C ~ 70 DEG C more than cogging forging temperature, the upsetting pull for carrying out 1 fire time to blank is forged, and forging ratio control exists
It is air-cooled after forging between 2.5-3.5；
Step 4: more than beta transus temperature forging
Heating temperature carries out the upsetting of 1~2 fire time to the blank handled by step 3 50 DEG C~100 DEG C more than beta transus temperature
Forging is pulled out, every fire time forging ratio control is air-cooled after forging between 2.5-3.5；
Step 5: recrystallization homogenization heat treatment forging
Heating temperature 30 DEG C~50 DEG C below beta transus temperature, forge by the upsetting pull for carrying out 1 fire time to the blank handled by step 4
Make, hot material melts down is heat-treated between 1.4-1.8, after forging for forging ratio control, heat treatment heating temperature be beta transus temperature with
Upper 50 DEG C~100 DEG C, a upsetting one is carried out to blank after coming out of the stove and pulls out forging, forging ratio controls between 1.1-1.4, air-cooled after forging；
Step 6: being forged below beta transus temperature
Heating temperature carries out the upsetting pull of 2~3 fire time to the blank handled by step 5 20 DEG C ~ 40 DEG C below beta transus temperature
Forging, every fire time forging ratio control are taken air-cooled between 1.4-1.8, after forging；
Step 7: finished product forging
The forging stock of step (6) is subjected to 2~4 fire time pulling forgings for 30~50 DEG C below transformation temperature, every fire time forging ratio control exists
Between 1.2~2.8, taken after pulling forging air-cooled.
3. TC25 titanium alloy large size bar processing method according to claim 2, which is characterized in that tied again in step 5
Crystalline substance homogenization Heating Time In The Heat Treatment is 200~300min.
4. TC25 titanium alloy large size bar processing method according to claim 2 or 3, which is characterized in that step 3, step
Upsetting pull in rapid 4 is forged to two upsettings two and pulls out；Upsetting pull in step 5, step 6 is forged to a upsetting one and pulls out.
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| CN110586828A (en) * | 2019-10-11 | 2019-12-20 | 湖南金天钛业科技有限公司 | Free forging method of Ti662 titanium alloy large-size bar |
| CN111438317A (en) * | 2020-02-28 | 2020-07-24 | 哈尔滨工业大学（威海） | Preparation method for forging and forming high-strength high-toughness β -type titanium alloy forging |
| CN111842747A (en) * | 2020-06-17 | 2020-10-30 | 西部超导材料科技股份有限公司 | Forging method of large-size TA15 titanium alloy special-shaped forging stock |
| CN112045128A (en) * | 2020-09-14 | 2020-12-08 | 湖南金天钛业科技有限公司 | Free forging method of TB6 titanium alloy large-size bar |
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| CN111438317B (en) * | 2020-02-28 | 2021-11-30 | 哈尔滨工业大学（威海） | Preparation method for forging and forming high-strength high-toughness near-beta type titanium alloy forging |
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| CN112338119A (en) * | 2020-10-28 | 2021-02-09 | 湖南金天钛业科技有限公司 | Method for forging near-alpha type high-temperature titanium alloy large-size bar |
| CN112676503A (en) * | 2020-11-30 | 2021-04-20 | 湖南金天钛业科技有限公司 | Forging processing method for TC32 titanium alloy large-size bar |
| CN112676503B (en) * | 2020-11-30 | 2022-12-06 | 湖南湘投金天钛业科技股份有限公司 | Forging processing method for TC32 titanium alloy large-size bar |
| CN112828222A (en) * | 2020-12-30 | 2021-05-25 | 西安西工大超晶科技发展有限责任公司 | Preparation method of multi-component titanium alloy forging |
| CN115261671A (en) * | 2022-07-14 | 2022-11-01 | 中国科学院金属研究所 | Heat-strength high-temperature titanium alloy and hot processing method thereof |
| CN115261671B (en) * | 2022-07-14 | 2023-12-29 | 宝鸡西工钛合金制品有限公司 | High-temperature titanium alloy with heat resistance and heat processing method thereof |
| CN115595521A (en) * | 2022-10-19 | 2023-01-13 | 湖南湘投金天钛业科技股份有限公司（Cn） | Forging method of Ti17 titanium alloy large-size bar with high structural uniformity |
| CN115595521B (en) * | 2022-10-19 | 2023-07-14 | 湖南湘投金天钛业科技股份有限公司 | Forging method of Ti17 titanium alloy large-size bar with high tissue uniformity |
| CN117403157A (en) * | 2023-10-12 | 2024-01-16 | 西北工业大学 | Preparation method of high-impact-resistance M36 titanium alloy bar |
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