CN115041616B - High-efficiency and low-cost TC19 titanium alloy beta forging blisk forging preparation method - Google Patents
High-efficiency and low-cost TC19 titanium alloy beta forging blisk forging preparation method Download PDFInfo
- Publication number
- CN115041616B CN115041616B CN202210761652.1A CN202210761652A CN115041616B CN 115041616 B CN115041616 B CN 115041616B CN 202210761652 A CN202210761652 A CN 202210761652A CN 115041616 B CN115041616 B CN 115041616B
- Authority
- CN
- China
- Prior art keywords
- forging
- beta
- blisk
- titanium alloy
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- B21J1/04—Shaping in the rough solely by forging or pressing
-
- 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
-
- 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
-
- 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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Abstract
The invention relates to a high-efficiency and low-cost TC19 titanium alloy beta forging blisk forge piece preparation method, which comprises the processes of bar forging, forge piece heat treatment and the like. The beta forging TC19 alloy bar is used as the raw material of the blisk forging, the firing time of repeated upsetting of a two-phase region in the bar preparation process is greatly shortened, the blisk forging is obtained by beta final forging and solid solution and aging heat treatment of the beta forging bar, the structure is a typical basket structure, the original beta crystal grain size is fine and uniform, the alpha phase of the inner sheet layer of the crystal grain is woven well, and the mechanical property of the beta forging bar is equivalent to that of the forging prepared by the traditional two-state structure bar.
Description
Technical Field
The invention belongs to the technical field of blisk forging preparation, and particularly relates to a high-efficiency and low-cost TC19 titanium alloy beta forging blisk forging preparation method.
Background
The nominal component Ti-6Al-2Sn-4Zr-6Mo of the TC19 titanium alloy is an alpha-beta titanium alloy rich in beta stable elements, is mainly used for medium-temperature Duan Ling parts of aero-engines, such as compressor discs, fans, blades and the like, and has the long-term use temperature of about 450 ℃ and the short-term use temperature of 540 ℃. Beta forging is generally adopted to obtain a basket structure with good fracture toughness and creep property, and two-phase zone forging can be adopted to obtain a two-state structure with excellent plasticity and fatigue property.
The titanium alloy bar is used as a semi-finished product of a forge piece, generally, the bar basically adopts a beta single-phase region cogging and two-phase region multi-firing upsetting deformation to obtain a uniform two-state structure, and an equiaxial alpha phase is spheroidized. And the subsequent forging die forging and forming process also adopts two-phase region forging, and the ideal structure of the forging is also a uniform double-state structure, namely, the forging with different performances can be obtained by changing the structure characteristics such as the content of the equiaxial alpha phase and the like through the heat treatment of the two-phase region. The conventional beta forging adopted by TC19 alloy is forging of titanium alloy above the beta transformation point, wherein the titanium alloy above the beta transformation point is all beta phase, and the equiaxial alpha phase is converted into beta phase, so that the process of repeatedly upsetting and pulling the bar by adopting a two-phase region is long in period and high in cost.
Chinese patent CN201710592010.2 entitled "free forging method of TC19 titanium alloy large-sized bar" discloses a free forging method of TC19 titanium alloy large-sized bar, which comprises cogging forging, forging below the first β -transition temperature, heat treatment above the first β -transition temperature, forging below the second β -transition temperature, heat treatment above the second β -transition temperature, and forging below the third β -transition temperature, thereby obtaining TC19 titanium alloy bar with uniform structure and excellent performance. The patent only relates to bar preparation, the process is complex, and the bar is a typical bimodal structure, which is inconsistent with the bar technical route of the high-efficiency and low-cost beta forging.
Zhu Baohui et al describe in the "development of TCl9 titanium alloy bars" literature of the journal of titanium industry progress two processes for preparing TC19 titanium alloy bars, namely two forging processes, namely, high-low-high forging (i.e., β forging+ (α+β) forging+β forging+ (α+β) forging), with conventional β forging+ (α+β) forging, respectively, but the bar is essentially a two-phase region, and the preparation process is complex and inconsistent with the technical route of this patent.
Therefore, development of a high-efficiency and low-cost TC19 titanium alloy beta forging blisk forging preparation method is needed, a process route that a beta forging bar is used as a raw material of the beta forging is realized, forging heat cost is reduced, preparation efficiency is improved, and the method can be used for mass production.
Disclosure of Invention
In view of the above-mentioned circumstances in the prior art, the invention provides a high-efficiency and low-cost preparation method of a TC19 titanium alloy beta forging blisk forging, by using a beta forging TC19 alloy bar as a semi-finished product of the blisk forging, the number of times of repeated upsetting and pulling of a two-phase region in the bar preparation process can be greatly shortened, in addition, the forging deformation resistance above a beta transformation point is low, the original beta grains can be thinned by increasing the deformation, and the tissue performance of the blisk forging prepared by the method is equivalent to that of a forging prepared by the traditional two-state tissue bar, but the cost is remarkably reduced and the efficiency is improved.
The above object of the present invention is achieved by the following technical solutions:
a preparation method of a TC19 titanium alloy beta forging blisk forge piece with high efficiency and low cost comprises the following specific steps:
1) Heating the cast ingot to 50-250 ℃ above the beta transformation point, and forging for 1-3 times;
2) Heating the rod blank in the step 1) to 20-60 ℃ below the beta transformation point to forge for 1-3 times;
3) Heating the rod blank in the step 2) to 50-150 ℃ above the beta phase transition point, forging for 1-3 times, and preparing a semi-finished product;
4) Blanking the rod blank in the step 3) according to multiple scales, and machining or forging the single multiple-scale blank into a preform by 1 fire time;
5) Heating the preform in the step 4) to 20-50 ℃ above the beta phase transition point to perform 1-fire die forging;
6) And (3) carrying out solid solution and aging heat treatment on the forging blank in the step (5).
Preferably, the heat preservation time is calculated according to the effective section thickness of 0.6-1.0 min/mm in all steps 1) to 3).
Preferably, the step 1) further includes: the last fire adopts water cooling, the last fire adopts air cooling, the heating temperature is reduced along with the increase of forging fire, each forging is performed for two upsetting and two drawing, and the nominal deformation of each forging upsetting and drawing deformation is not less than 40%.
Preferably, air cooling is adopted after forging in the step 2), each forging time is two upsetting and two drawing, and the nominal deformation amount of each upsetting and drawing deformation is not less than 40%.
Preferably, the step 3) further includes: the last fire adopts water cooling, the last fire adopts air cooling, the heating temperature is reduced along with the increase of forging fire, each forging is one upsetting and one drawing, and the nominal deformation of each upsetting and drawing deformation is not less than 40%.
Preferably, the step 4) further includes: the shape of the prefabricated blank is designed according to the blisk forging, and the strain of the blisk body after die forging is over 0.5.
Preferably, the step 5) further includes: after the preform in the step 4) reaches the heat preservation time and is discharged from the furnace and positioned, the constant strain rate is controlled to be 0.005s -1 ～0.05s -1 I.e. the upper cavity die contactsAnd uniformly decelerating and pressing the prefabricated blank, and air-cooling to room temperature after forging.
Preferably, the step 5) further includes: and calculating the heat preservation time according to the effective section thickness of 0.2-0.4 min/mm. In the step 5) of the invention, the beta forging bar is adopted as the raw material, if a blank with larger section size is encountered, the blank is not required to be heated for a long time in a beta phase region (the heat preservation time is calculated according to the effective section thickness of 0.6-1.0 min/mm) or heated in a gradient way (the first gradient heat preservation time is calculated according to the effective section thickness of 0.6-1.0 min/mm below a phase change point), and the second gradient heat preservation time is calculated according to the effective section thickness of 0.2-0.6 min/mm above the phase change point) in other conventional beta forging modes, so that the abnormal growth of the original beta grains in the blank heating process can be effectively avoided.
Preferably, the step 5) further includes: and heating the die to 30-60 ℃ below the phase transition point, forging the die into a blisk forging blank, and then cooling the blisk forging blank to room temperature.
Preferably, the solution heat treatment system in the step 6) is as follows: heating to 20-50 ℃ below the beta phase transition point, preserving heat for 2-3 hours, and cooling by a fan; the ageing heat treatment system is as follows: heating to 579-620 ℃, preserving heat for 8-10 h, and then air cooling.
Compared with the prior art, the invention has the following advantages:
1. the invention utilizes the process of cogging in the beta single-phase region, upsetting in the two-phase region with less heat and upsetting in the beta single-phase region, and the process of upsetting in the beta single-phase region is utilized to obtain the original sheet structure with fine beta grains, and the structure is deformed by the single-phase region with 1 heat, thus obtaining the required basket structure.
2. The invention comprises the processes of bar forging, forging heat treatment and the like, and uses the beta forging TC19 alloy bar as the raw material of the blisk forging, so that the number of times of repeated upsetting in a two-phase region in the bar preparation process is greatly shortened, the blisk forging is obtained by beta final forging, solid solution and aging heat treatment of the beta forging bar, the structure is a typical basket structure, the original beta crystal grain size is fine and uniform, the alpha phase of the inner crystal grain sheet layer is woven well, and the mechanical property is equivalent to that of the forging prepared by the traditional double-state structure bar.
3. Aiming at the TC19 blisk forging of beta forging, the invention uses the beta forging TC19 alloy bar as the raw material of the forging, greatly shortens the firing time of repeated upsetting of the two-phase region in the bar preparation process, improves the forging preparation efficiency, reduces the cost, and finally has the tissue performance equivalent to that of the forging prepared by the traditional dual-state tissue bar.
Drawings
FIG. 1 microstructure of beta-wrought TC19 titanium alloy bar in example 1
FIG. 2A low-power microstructure of a beta-wrought TC19 titanium alloy bar in example 1
FIG. 3A 100-fold enlarged view (1) and a 500-fold enlarged view (2) of the microstructure of a beta forging TC19 titanium alloy blisk forging in example 1
FIG. 4 microstructure of beta-wrought TC19 titanium alloy bar in example 2
FIG. 5 Low-power microstructure of beta-wrought TC19 titanium alloy bar in example 2
FIG. 6A 100-fold enlarged view (1) and a 500-fold enlarged view (2) of the microstructure of a beta forging TC19 titanium alloy blisk forging in example 2
FIG. 7 microstructure of beta-wrought TC17 titanium alloy bar in example 3
FIG. 8 Low-power microstructure of beta-wrought TC17 titanium alloy bar in example 3
FIG. 9 200 shows a 200-fold magnification (1) and 500-fold magnification (2) of the microstructure of a beta forging TC17 titanium alloy blisk forging in example 3
Detailed Description
The present invention will be further described in detail with reference to the drawings and examples for more clearly understood objects, technical solutions and advantages of the present invention.
By implementing the preparation method of the TC19 titanium alloy beta forging blisk forge piece, which is high in efficiency and low in cost, equipment such as a TC19 titanium alloy cast ingot, a forging heating furnace, a quick forging machine, a hydraulic press, a manipulator, a heat treatment heating furnace, a water tank, a lathe, a milling machine and the like which are subjected to three times of vacuum consumable smelting is needed. The specific process steps are as follows: 1. heating the cast ingot to 50-250 ℃ above the beta transformation point, and forging for 1-3 times; 2. heating the rod blank in the step 1 to 20-60 ℃ below the beta transformation point to forge for 1-3 times; 3. heating the rod blank in the step 2 to 50-150 ℃ above the beta phase transition point, and forging for 1-3 times; 4. blanking the rod blank in the step 3 according to multiple sizes, and machining or forging the single multiple-size blank for 1 time to obtain a preform; 5. heating the preform in the step 4 to 20-50 ℃ above the beta phase transition point to perform 1-fire die forging; 6. and (5) carrying out solid solution and aging heat treatment on the forging blank in the step (5).
Example 1
Ingot casting of three times of vacuum consumable smelting: alpha-beta type two-phase titanium alloys, such as: the Chinese material brand is TC 19.
Step 1: according to engineering experience, the range of the transformation point of the TC19 titanium alloy is about 950-980 ℃, an ingot with the diameter of phi 390mm is heated to 1150 ℃ for forging the 1 st firing time, the heat preservation time is 240min, the nominal deformation is 50%, and the ingot is air-cooled after forging; heating to 1080 ℃ to forge the steel plate at the 2 nd fire, keeping the temperature for 240min, and cooling the steel plate after forging, wherein the nominal deformation is 50%.
Step 2: heating the rod blank in the step 1 to 930 ℃ for forging the 3 rd fire time, preserving heat for 220min, and performing air cooling after forging, wherein the nominal deformation is 50%; the phase transition point of the bar measured according to HB 6623.2 [ metallographic method of titanium alloy beta transformation temperature measuring point method ] is 965 ℃; heating to 930 ℃ to forge with 4 th fire, preserving heat for 200min, and cooling after forging, wherein the nominal deformation is 50%.
Step 3: heating the rod blank in the step 2 to 1050 ℃ for 5 th fire forging, preserving heat for 180min, upsetting the nominal deformation by 50%, drawing the nominal deformation by 70%, and air cooling after forging; heating to 1000 ℃ for forging by a 6 th fire, preserving heat for 120min, upsetting the nominal deformation by 50%, drawing the nominal deformation by 70%, and cooling by water after forging. The microstructure and the low-power structure of the obtained beta forging phi 180mm TC19 titanium alloy bar are respectively shown in figures 1 and 2, the microstructure is a typical beta forging basket structure, the original beta grains are fine, the low-power structure is a typical semi-clear crystal structure, the low-power structure is uniform, no abnormal area of coarse grains exists, and the microstructure meets the structural requirement of the beta forging on the beta forging bar.
Step 4: blanking the bar with the diameter of 180mm in the step 3 according to 385mm multiple, upsetting and punching to obtain an annular preform with the outer diameter of 315mm and the inner diameter of 150 mm.
Step 5: heating the preform in the step 4 to the temperature of 995 ℃ which is 30 ℃ above the phase transition point, heating the die to the temperature of 930 ℃ which is 35 ℃ below the phase transition point, calculating the heat preservation time which is 60min according to the effective section thickness of 0.3min/mm, discharging the preform from the furnace after the heat preservation time is up to the position, controlling the constant strain rate to be 0.005s < -1 >, namely the depressing speed to be 1.4mm/s, uniformly decelerating to 0.7mm/s, and cooling to the room temperature after forging.
Step 6: carrying out solid solution and aging heat treatment on the forging blank in the step 5, wherein the solid solution heat treatment system is as follows: heating to 30 ℃ below the beta phase transition point, preserving heat for 2 hours, and cooling by a fan; the ageing heat treatment system is as follows: heating to 595 deg.C, maintaining for 8 hr, and air cooling.
The microstructure of the beta forging TC19 titanium alloy blisk forge piece prepared by the method is shown in figure 3, is also a typical beta forging basket structure, has fine grain boundary alpha phase, has the original beta grain size not more than 1500 mu m, and is consistent with the forge piece structure type prepared by adopting a two-phase area bar material. The mechanical properties of the forging piece prepared by the beta forging bar are equivalent to those of the forging piece prepared by the conventional two-phase region bar, as shown in the table 1, the technical route is feasible, the index requirements of the forging piece on the structure and various mechanical properties are met, the forging of more than 5 times of fire can be reduced in the bar preparation process, and the forging method can be used for batch production of beta forging TC19 titanium alloy blisk forging pieces. And can be popularized to high-temperature titanium alloy forgings which partially adopt beta forging preparation technology, such as 650 ℃ high-temperature titanium alloy and TC17 titanium alloy.
TABLE 1
Example 2
Ingot casting of three times of vacuum consumable smelting: alpha-beta type two-phase titanium alloys, such as: the Chinese material brand is TC 19.
Step 1: according to engineering experience, the range of the transformation point of the TC19 titanium alloy is about 950-980 ℃, an ingot with the diameter of phi 680mm is heated to 1150 ℃ for forging the 1 st firing time, the heat preservation time is 420min, the nominal deformation is 50%, and the ingot is air-cooled after forging; heating to 1080 ℃ to forge the steel plate at the 2 nd fire, keeping the temperature for 420min, wherein the nominal deformation is 50%, and performing air cooling after forging; heating to 1080 ℃ to forge the steel plate at the 2 nd fire, keeping the temperature for 420min, wherein the nominal deformation is 50%, and cooling the steel plate after forging.
Step 2: heating the rod blank in the step 1 to 930 ℃ for forging the 4 th fire time, preserving the heat for 360min, and cooling the rod blank in air after forging, wherein the nominal deformation is 50%; the phase transition point of the bar measured according to HB 6623.2 [ titanium alloy beta transformation temperature measuring point method metallography ] is 970 ℃; heating to 935 ℃ to forge the steel plate at the 5 th fire, keeping the temperature for 360min, and cooling the steel plate after forging, wherein the nominal deformation is 50%; heating to 935 ℃ to forge with 6 th fire, preserving heat for 340min, and cooling with air after forging, wherein the nominal deformation is 50%.
Step 3: heating the rod blank in the step 2 to 1055 ℃ for 7 th fire forging, preserving heat for 320min, upsetting the nominal deformation by 40%, drawing the nominal deformation by 60%, and air cooling after forging; heating to 1005 ℃ to perform 8 th forging, preserving heat for 320min, upsetting the nominal deformation amount to 40%, drawing the nominal deformation amount to 60%, and cooling after forging to obtain the beta-forging phi 400mm TC19 titanium alloy bar, wherein the microstructure and the macrostructure are respectively shown in fig. 4 and 5, the microstructure is a typical beta-forging basket structure, the original beta grains are fine, the macrostructure is a typical semi-clear crystal structure, the macrostructure is uniform, no abnormal region of coarse grains exists, and the microstructure requirement of the beta-forging bar is met.
Step 4: and (3) blanking the phi 400mm bar in the step (3) according to a 380mm multiple rule, and machining to obtain an annular preform with the outer diameter of 400mm and the inner diameter of 180 mm.
Step 5: heating the preform in the step 4 to 30 ℃ which is 1000 ℃ above the phase transition point, heating the die to 930 ℃ which is 40 ℃ below the phase transition point, calculating the heat preservation time which is 75min according to the effective section thickness of 0.3min/mm, discharging the preform from the furnace after the heat preservation time is reached and positioning is completed, controlling the constant strain rate to be 0.01s < -1 >, namely the depressing speed to be 3.9m/s, uniformly decelerating to be 1.8mm/s, and cooling to room temperature after forging.
Step 6: carrying out solid solution and aging heat treatment on the forging blank in the step 5, wherein the solid solution heat treatment system is as follows: heating to 40 ℃ below the beta phase transition point, preserving heat for 3 hours, and cooling by a fan; the ageing heat treatment system is as follows: heating to 580 deg.C, maintaining for 9h, and air cooling.
The microstructure of the beta forging TC19 titanium alloy blisk forge piece prepared by the method is shown in fig. 6, is a typical beta forging basket structure, has fine grain boundary alpha phase, has original beta grain size not more than 1500 mu m, and is consistent with the forge piece structure type prepared by adopting a two-phase area bar. The mechanical properties are shown in Table 2 and are comparable to those of forgings made with two-phase area bars. The technical route is feasible, the index requirements of the forging on the microstructure and various mechanical properties are met, the forging time of more than 8 fires can be reduced in the bar preparation process, and the method can be used for batch production of beta forging TC19 titanium alloy blisk forgings. And can be popularized to high-temperature titanium alloy forgings which partially adopt beta forging preparation technology, such as 650 ℃ high-temperature titanium alloy and TC17 titanium alloy.
TABLE 2
Example 3
The technology can be popularized and applied to the preparation of the beta forging TC17 titanium alloy blisk forgings. Ingot casting of three times of vacuum consumable smelting: alpha-beta type two-phase titanium alloys, such as: the Chinese material brand is TC 17. The process method
Step 1: according to engineering experience, the range of the transformation point of the TC17 titanium alloy is about 880-910 ℃, an ingot with the diameter of phi 700mm is heated to 1050 ℃ for forging the 1 st firing time, the heat preservation time is 450min, the nominal deformation is 50%, and the ingot is air-cooled after forging; heating to 1020 ℃ to forge the steel plate at the 2 nd fire, keeping the temperature for 450min, wherein the nominal deformation is 50%, and performing air cooling after forging; and heating to 980 ℃ to forge the steel plate with the 2 nd fire, keeping the temperature for 450min, and cooling the steel plate after forging, wherein the nominal deformation is 50%.
Step 2: heating the rod blank in the step 1 to 850 ℃ for forging the 4 th fire time, preserving the heat for 420min, and performing air cooling after forging, wherein the nominal deformation is 50%; the phase transition point of the bar measured according to HB 6623.2 [ metallographic method of titanium alloy beta transformation temperature measuring point method ] is 900 ℃; heating to 840 ℃ to forge the steel plate at the 5 th fire, preserving the heat for 400min, wherein the nominal deformation is 50%, and performing air cooling after forging; heating to 840 ℃ to forge the steel by the 6 th fire, keeping the temperature for 400min, and cooling the steel after forging, wherein the nominal deformation is 50%.
Step 3: heating the rod blank in the step 2 to 980 ℃ for 7 th fire forging, preserving heat for 400min, upsetting the nominal deformation by 40%, drawing the nominal deformation by 60%, and air cooling after forging; heating to 960 ℃ to perform 8 th forging, preserving heat for 360min, upsetting the nominal deformation amount to 40%, drawing the nominal deformation amount to 60%, and cooling after forging to obtain the beta-forging phi 500mm TC17 titanium alloy bar, wherein the microstructure and the macrostructure are respectively shown in fig. 7 and 8, the microstructure is a typical beta-forging basket structure, the original beta grains are fine, the macrostructure is a typical semi-clear crystal structure, the macrostructure is uniform, no abnormal region of coarse grains exists, and the microstructure requirement of the beta-forging bar is met.
Step 4: blanking the phi 500mm bar in the step 3 according to a length of 685mm, upsetting and punching by 1 fire to obtain an annular preform with the outer diameter of 700mm and the inner diameter of 150 mm.
Step 5: heating the preform in the step 4 to 930 ℃ which is 30 ℃ above the phase transition point, heating the die to 870 ℃ which is 30 ℃ below the phase transition point, calculating the heat preservation time which is 90min according to the effective section thickness of 0.3min/mm, discharging the preform from the furnace for the heat preservation time, and controlling the constant strain rate to be 0.01s after positioning is completed -1 I.e. the depressing speed is 1.8mm/s and is uniformly reduced to 0.1mm/s, and the forging is followed by rapid air coolingRoom temperature.
Step 6: carrying out solid solution and aging heat treatment on the forging blank in the step 5, wherein the solid solution heat treatment system is as follows: heating to 95 ℃ below the beta phase transition point, preserving heat for 3 hours, and then cooling with water; the ageing heat treatment system is as follows: heating to 620 ℃ and preserving heat for 8 hours, and then air cooling.
The microstructure of the beta forging TC17 titanium alloy blisk forge piece prepared by the method is shown in figure 9, is a typical beta forging basket structure, has fine grain boundary alpha phase, has original beta grain size not more than 1500 mu m, and is consistent with the forge piece structure type prepared by adopting a two-phase area bar. The mechanical properties are shown in Table 3 and are comparable to those of forgings made with two-phase area bars. The technical route is feasible, the index requirements of the forging on the microstructure and various mechanical properties are met, the forging time of more than 10 fire times can be reduced in the bar preparation process, and the method can be used for batch production of beta forging TC17 titanium alloy blisk forgings.
TABLE 3 Table 3
Claims (7)
1. The preparation method of the TC19 titanium alloy beta forging blisk forge piece is high in efficiency and low in cost, and is characterized by comprising the following specific steps of:
1) Heating the cast ingot to 50-250 ℃ above the beta transformation point, and forging for 1-3 times; the last fire adopts water cooling, the last fire is air cooled, the heating temperature is reduced along with the increase of forging fire, each forging is performed for two upsetting and two drawing, and the nominal deformation of each forging upsetting and drawing deformation is not less than 40%;
2) Heating the rod blank in the step 1) to 20-60 ℃ below the beta transformation point to forge for 1-3 times; air cooling is adopted after forging, each forging is performed for two upsetting and two drawing, and the nominal deformation of each forging deformation is not less than 40%;
3) Heating the rod blank in the step 2) to 50-150 ℃ above the beta phase transition point, forging for 1-3 times, and preparing a semi-finished product; the last fire adopts water cooling, the last fire is air cooled, the heating temperature is reduced along with the increase of forging fire, each forging is performed by one upsetting and one drawing, and the nominal deformation of each upsetting and drawing deformation is not less than 40%;
4) Blanking the rod blank in the step 3) according to multiple scales, and machining or forging the single multiple-scale blank into a preform by 1 fire time;
5) Heating the preform in the step 4) to 20-50 ℃ above the beta phase transition point to perform 1-fire die forging;
6) And (3) carrying out solid solution and aging heat treatment on the forging blank in the step (5).
2. The method for preparing the TC19 titanium alloy beta forging blisk forging with high efficiency and low cost according to claim 1, wherein the steps 1) to 3) are all carried out according to the effective section thickness of 0.6 to 1.0 min/mm.
3. The method for preparing a high-efficiency and low-cost TC19 titanium alloy beta forging blisk forging according to claim 1, wherein said step 4) further comprises: the shape of the prefabricated blank is designed according to the blisk forging, and the strain of the blisk body after die forging is over 0.5.
4. The method for preparing a high-efficiency and low-cost TC19 titanium alloy beta forging blisk forging according to claim 1, wherein said step 5) further comprises: and calculating the heat preservation time according to the effective section thickness of 0.2-0.4 min/mm.
5. The method for manufacturing a high efficiency and low cost TC19 titanium alloy beta forging blisk forging as recited in claim 4, wherein said step 5) further comprises: and heating the die to 30-60 ℃ below the phase transition point, forging the die into a blisk forging blank, and then cooling the blisk forging blank to room temperature.
6. The method for preparing a high-efficiency and low-cost TC19 titanium alloy beta forging blisk forging according to claim 1, wherein said step 5) further comprises: after the prefabricated blank in the step 4 reaches the heat preservation time and is discharged from the furnace and positioned, controllingConstant strain rate of 0.005s -1 ～0.05s -1 The upper cavity die is uniformly decelerated and pressed after contacting the preform, and air-cooled to room temperature after forging.
7. The method for preparing a high-efficiency and low-cost TC19 titanium alloy beta forging blisk forging according to claim 1, wherein the solid solution heat treatment system in the step 6) is as follows: heating to 20-50 ℃ below the beta phase transition point, preserving heat for 2-3 hours, and cooling by a fan; the ageing heat treatment system is as follows: heating to 579-620 ℃, preserving heat for 8-10 h, and then air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210761652.1A CN115041616B (en) | 2022-06-29 | 2022-06-29 | High-efficiency and low-cost TC19 titanium alloy beta forging blisk forging preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210761652.1A CN115041616B (en) | 2022-06-29 | 2022-06-29 | High-efficiency and low-cost TC19 titanium alloy beta forging blisk forging preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115041616A CN115041616A (en) | 2022-09-13 |
| CN115041616B true CN115041616B (en) | 2023-07-25 |
Family
ID=83165958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210761652.1A Active CN115041616B (en) | 2022-06-29 | 2022-06-29 | High-efficiency and low-cost TC19 titanium alloy beta forging blisk forging preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115041616B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159472C (en) * | 2001-09-04 | 2004-07-28 | 北京航空材料研究院 | Titanium alloy quasi-beta forging process |
| US10502252B2 (en) * | 2015-11-23 | 2019-12-10 | Ati Properties Llc | Processing of alpha-beta titanium alloys |
| CN111235506B (en) * | 2020-03-19 | 2022-02-15 | 中国科学院金属研究所 | Thermal processing technology of TC25G titanium alloy forging |
| CN111390081B (en) * | 2020-03-19 | 2022-08-09 | 中国科学院金属研究所 | Preparation process of TC25G titanium alloy forging with high creep resistance and high fracture toughness |
| CN112222341A (en) * | 2020-10-16 | 2021-01-15 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Manufacturing method of TC17 titanium alloy die forging |
| CN113369428A (en) * | 2021-07-07 | 2021-09-10 | 中国航发北京航空材料研究院 | Preparation method of large-size TC17 titanium alloy beta-forged blisk forging |
| CN113649503A (en) * | 2021-07-30 | 2021-11-16 | 中国航发北京航空材料研究院 | High-strength beta forging titanium alloy forging structure control method for aircraft engine |
-
2022
- 2022-06-29 CN CN202210761652.1A patent/CN115041616B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN115041616A (en) | 2022-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111235506B (en) | Thermal processing technology of TC25G titanium alloy forging | |
| CN111235505B (en) | Preparation process of high-strength and high-toughness TC25G titanium alloy ring piece | |
| CN112247043B (en) | Ti2Preparation process of AlNb-based alloy forging | |
| CN109439936B (en) | Preparation method of medium-strength high-toughness titanium alloy ultra-large-specification ring material | |
| RU2368695C1 (en) | Method of product's receiving made of high-alloy heat-resistant nickel alloy | |
| RU2066253C1 (en) | Method of making turbine blades | |
| CN112207220B (en) | Ti2Preparation process of AlNb-based alloy ring piece | |
| CN111318581B (en) | Manufacturing method of basket structure titanium alloy large-size ring piece | |
| CN110205571B (en) | Preparation method of TC18 titanium alloy large-size bar | |
| CN111036705B (en) | Large-caliber titanium alloy seamless pipe and preparation method thereof | |
| CN109482796B (en) | Beta forging and heat treatment method of TC4 titanium alloy disc forging | |
| RU2644830C2 (en) | Manufacturing method of bar stock from alloys based on titanium intermetallide with ortho-phase | |
| WO2012044204A1 (en) | METHOD FOR MANUFACTURING DEFORMED ARTICLES FROM PSEUDO-β-TITANIUM ALLOYS | |
| CN107350405A (en) | The free forging method of TA19 titanium alloy large size bars | |
| JP2008229680A (en) | PROCESS FOR PRODUCING MOLDED PRODUCT OF TiAl-BASED ALLOY | |
| CN107350406A (en) | The free forging method of TC19 titanium alloy large size bars | |
| CN114042847A (en) | Forging method for improving fracture toughness of TB6 titanium alloy | |
| CN110205572B (en) | Preparation method of two-phase Ti-Al-Zr-Mo-V titanium alloy forged rod | |
| CN115041616B (en) | High-efficiency and low-cost TC19 titanium alloy beta forging blisk forging preparation method | |
| CN105039886A (en) | Method for preparing Zr-2.5Nb alloy rod with uniform small structure phase | |
| CN108472703A (en) | The method for manufacturing bar using titanium alloy | |
| RU2761398C1 (en) | Method for processing rods made of ortho-titanium alloys for producing blades of a gas turbine engine compressor | |
| CN113118349B (en) | Preparation method of Ti6242 titanium alloy large-thickness cake blank | |
| CN114273863B (en) | Preparation method of titanium alloy ring piece | |
| CN114769480B (en) | Ti (titanium) 2 Preparation process of AlNb-based alloy ring piece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |