CN117066420A - Forging method and device for TC4 titanium alloy bar - Google Patents
Forging method and device for TC4 titanium alloy bar Download PDFInfo
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- CN117066420A CN117066420A CN202310604911.4A CN202310604911A CN117066420A CN 117066420 A CN117066420 A CN 117066420A CN 202310604911 A CN202310604911 A CN 202310604911A CN 117066420 A CN117066420 A CN 117066420A
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- 238000005242 forging Methods 0.000 title claims abstract description 223
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 48
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 87
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 87
- 239000010936 titanium Substances 0.000 claims abstract description 87
- 238000010438 heat treatment Methods 0.000 claims abstract description 61
- 230000009466 transformation Effects 0.000 claims abstract description 16
- 230000007704 transition Effects 0.000 claims description 23
- 238000003825 pressing Methods 0.000 claims description 16
- 238000004321 preservation Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 21
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 description 20
- 238000005485 electric heating Methods 0.000 description 17
- 230000007547 defect Effects 0.000 description 14
- 238000005498 polishing Methods 0.000 description 13
- 239000002699 waste material Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- B21J5/008—Incremental forging
-
- 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
- B21J5/08—Upsetting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a forging method of a TC4 titanium alloy bar, which comprises the following steps: obtaining a titanium ingot after first cogging forging; performing reciprocating heating forging on the titanium ingot subjected to the first cogging forging to obtain a titanium ingot subjected to the reciprocating heating forging; and performing twice cogging forging and drawing forging on the titanium ingot subjected to the reciprocating heating forging to obtain the target titanium alloy bar. According to the invention, after cogging forging, the forging is performed in a reciprocating manner up and down at the transformation point, and the effect of crushing coarse beta crystals is increased, so that on the premise of guaranteeing the structural performance of a forging rod, the forging fire is reduced, the yield of the forging process is improved, and the power and labor cost in the production process are reduced.
Description
Technical Field
The invention relates to the technical field of titanium alloy preparation, in particular to a forging method and device for TC4 titanium alloy bars.
Background
TC4 (Ti-6 Al-4V) alloy is used as a dual-phase titanium alloy, and is the titanium alloy with the widest application range and the largest popularization amount at present due to good comprehensive performance and technological characteristics, and particularly replaces the traditional steel material in the aviation field, so that the weight of an airplane can be remarkably reduced. The TC4 titanium alloy products cover various material types such as plates, pipes, rods, wires and the like, and forging is an indispensable procedure in the preparation process although the final forming process is different, so that the effects of refining grains and improving the structure morphology are achieved.
The titanium alloy hot working temperature window is narrow, and the titanium alloy hot working temperature window is easy to react with oxyhydrogen nitrogen in the air at the high Wen Zhuding surface layer to form a hard and brittle surface layer, which can lead to easy production of processing defects on the surface layer of a titanium ingot in the forging deformation process, and the titanium ingot needs to be polished after each forging, so that certain loss is generated, and the production cost of the titanium alloy product is increased. However, the TC4 titanium alloy is forged, and the deformation is needed to be carried out on the transformation point up and down for a plurality of times, so that the aim of optimizing the tissue performance is fulfilled. Therefore, under the condition of ensuring qualified structure performance, how to improve the yield of the TC4 titanium alloy forging process and reduce the production cost becomes a current urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a forging method and device for TC4 titanium alloy bars, which improve the yield of TC4 titanium alloy forging procedures and reduce the production cost by reducing the forging firing time.
In order to achieve the above object, the present invention provides a forging method of a TC4 titanium alloy bar, comprising:
obtaining a titanium ingot after first cogging forging;
performing reciprocating heating forging on the titanium ingot subjected to the first cogging forging to obtain a titanium ingot subjected to the reciprocating heating forging;
and performing twice cogging forging and drawing forging on the titanium ingot subjected to the reciprocating heating forging to obtain the target titanium alloy bar.
Optionally, performing reciprocating heating forging on the titanium ingot after the first cogging forging to obtain a titanium ingot after the reciprocating heating forging, including:
heating the titanium ingot subjected to the first cogging forging to a temperature range lower than a phase transition point, and obtaining the titanium ingot subjected to the first upsetting forging through the first upsetting forging;
heating the titanium ingot after the first pier-drawing forging to a temperature range higher than the transformation point, and obtaining the titanium ingot after the second pier-drawing forging through the second pier-drawing forging;
and carrying out heat preservation on the titanium ingot after the second pier drawing forging in a temperature range lower than the phase transition point, and obtaining the titanium ingot after the third pier drawing forging through the third pier drawing forging.
Optionally, the upsetting pressing amounts in the first upsetting forging, the second upsetting forging and the third upsetting forging are 40% -50%, and the ratio of the length to the height to the diameter is 1.9-2.1.
Optionally, performing two times of cogging forging and drawing forging on the titanium ingot after the reciprocating heating forging to obtain a target titanium alloy bar, including:
heating the titanium ingot subjected to the third upsetting forging to a temperature range lower than the transformation point, and performing second cogging forging to obtain a titanium ingot subjected to the second cogging forging;
heating the titanium ingot after the second cogging forging to a temperature range lower than the transformation point, and obtaining the titanium ingot after the third cogging forging through the third cogging forging;
and heating the titanium ingot subjected to the third cogging forging to a temperature range lower than the transformation point, and obtaining the target titanium alloy bar through drawing forging.
Optionally, the first cogging forging, the second cogging forging and the third cogging forging are 3 times of upsetting and drawing, wherein the upsetting pressing amount is 40% -50%, and the drawing height-diameter ratio is 1.9-2.1.
Optionally, the temperature range below the phase change point is 20-40 ℃ below the phase change point, and the temperature range above the phase change point is 50-80 ℃ above the phase change point.
Optionally, obtaining the titanium ingot after the first cogging forging includes:
and heating the titanium ingot to a preset temperature and performing cogging forging to obtain the titanium ingot after the first cogging forging.
Optionally, the preset temperature is 1150 ℃.
Optionally, the specification of the target titanium alloy bar is phi 250-350mm.
The invention also provides a forging device of the TC4 titanium alloy bar, which comprises:
the first cogging forging unit is used for obtaining a titanium ingot after first cogging forging;
the reciprocating heating forging unit is used for carrying out reciprocating heating forging on the titanium ingot subjected to the first cogging forging to obtain a titanium ingot subjected to the reciprocating heating forging;
and the titanium alloy bar obtaining unit is used for performing twice cogging forging and drawing forging on the titanium ingot subjected to the reciprocating heating forging to obtain the target titanium alloy bar.
The invention has the technical effects and advantages that:
the invention provides a forging method of a TC4 titanium alloy bar, which comprises the following steps: obtaining a titanium ingot after first cogging forging; performing reciprocating heating forging on the titanium ingot subjected to the first cogging forging to obtain a titanium ingot subjected to the reciprocating heating forging; and performing twice cogging forging and drawing forging on the titanium ingot subjected to the reciprocating heating forging to obtain the target titanium alloy bar.
According to the invention, after cogging forging, the forging is performed in a reciprocating manner up and down at the transformation point, and the effect of crushing coarse beta crystals is increased, so that on the premise of guaranteeing the structural performance of a forging rod, the forging fire is reduced, the yield of the forging process is improved, and the power and labor cost in the production process are reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
FIG. 1 is a flow chart of a forging method of TC4 titanium alloy bars;
FIG. 2 is a photograph of a microstructure of a bar prepared in the examples;
FIG. 3 is a photograph of the microstructure of the bar material prepared in the comparative example;
fig. 4 is a schematic view of a forging apparatus for TC4 titanium alloy bars.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, the structures, proportions, sizes and the like shown in the drawings attached to the present specification are used for understanding and reading only in conjunction with the disclosure of the present specification, and are not intended to limit the applicable limitations of the present invention, so that any modification of the structures, variation of proportions or adjustment of sizes of the structures, proportions and the like should not be construed as essential to the present invention, and should still fall within the scope of the disclosure of the present invention without affecting the efficacy and achievement of the present invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
In order to solve the defects in the prior art, the invention discloses a forging method of a TC4 titanium alloy bar, as shown in figure 1. The method comprises the following steps: obtaining a titanium ingot after first cogging forging; performing reciprocating heating forging on the titanium ingot subjected to the first cogging forging to obtain a titanium ingot subjected to the reciprocating heating forging; and performing twice cogging forging and drawing forging on the titanium ingot subjected to the reciprocating heating forging to obtain the target titanium alloy bar.
According to the invention, after cogging forging, the forging is performed in a reciprocating manner up and down at the transformation point, and the effect of crushing coarse beta crystals is increased, so that on the premise of guaranteeing the structural performance of a forging rod, the forging fire is reduced, the yield of the forging process is improved, and the power and labor cost in the production process are reduced.
For a better understanding of the present solution, the forging method of the TC4 titanium alloy bar is explained in detail below.
A forging method of TC4 titanium alloy bars comprises the following specific steps:
1. cogging forging (first firing time): heating titanium ingot to 1150 ℃ in a box type electric heating furnace (the temperature of the cogging of the titanium alloy is generally selected to be 100-250 ℃ above the phase transition point, TC4 is generally selected to be 1150 ℃), preserving heat for 6-7h, then discharging the titanium ingot from the furnace and carrying out cogging forging on a 45MN hydraulic press, wherein the forging process is divided into 3 times of upsetting and drawing, the upsetting and pressing amount is controlled to be 40-50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
2. Reciprocating heat forging (second firing time): heating the polished titanium ingot to 20-40 ℃ below the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, and performing one pier and one drawing on a 45MN hydraulic press; returning to the furnace to raise the temperature to 50-80 ℃ above the phase transition point after one pier is pulled out, and discharging the furnace to finish one pier on the hydraulic press again after 3-4 hours of heat preservation; and cooling the heating furnace to 20-40 ℃ below the phase transition point, returning the titanium ingot to the furnace, preserving heat for 3-4 hours, discharging, and then completing one pier and one drawing on the hydraulic machine. The upsetting and pressing amount in the forging process is controlled to be 40% -50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
3. Two-phase zone forging (third and fourth hot forging): heating the polished titanium ingot to 20-40 ℃ below the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, performing cogging forging on a 45MN hydraulic press, wherein the forging process is divided into three piers and three pullers, and throwing out and polishing after the forging is completed;
after grinding, the cast ingot is heated to 20-40 ℃ below the phase transition point in a box type electric heating furnace, and is insulated for 6-7 hours, and then is discharged from the furnace to be subjected to cogging forging on a 45MN hydraulic press, wherein the forging process is divided into three piers and three pulls.
Wherein the upsetting pressing amount in the forging process is controlled to be 40% -50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
4. Drawing forging (fifth firing time): heating the polished titanium ingot to 20-40 ℃ below the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, and drawing and forging on a 45MN hydraulic press to obtain bars with the specification of phi 250-350mm.
Examples and comparative examples are also provided for better explanation of the present scheme.
Examples
Step 1, heating a titanium ingot to 1150 ℃ in a box type electric heating furnace, preserving heat for 6-7h, discharging, and performing cogging forging on a 45MN hydraulic press, wherein the forging process is divided into 3 times of upsetting and drawing, the upsetting and pressing amount is controlled to be 40% -50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
Step 2, heating the polished titanium ingot to 20-40 ℃ below the phase transition point in a box type electric heating furnace, preserving heat for 6-7 hours, discharging, and performing pier-to-pier drawing on a 45MN hydraulic press; returning to the furnace to raise the temperature to 50-80 ℃ above the phase transition point after one pier is pulled out, and discharging the furnace to finish one pier on the hydraulic press again after 3-4 hours of heat preservation; and cooling the heating furnace to 20-40 ℃ below the phase transition point, returning the titanium ingot to the furnace, preserving heat for 3-4 hours, discharging, and then completing one pier and one drawing on the hydraulic machine.
Wherein the upsetting pressing amount in the forging process is controlled to be 40% -50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
And 3, heating the polished titanium ingot to 20-40 ℃ below the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, performing cogging forging on a 45MN hydraulic press, wherein the forging process is divided into 3 times of upsetting and drawing, the upsetting and pressing amount is controlled to be 40-50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
And 4, heating the polished titanium ingot to 20-40 ℃ below the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, performing cogging forging on a 45MN hydraulic press, wherein the forging process is divided into 3 times of upsetting and drawing, the upsetting and pressing amount is controlled to be 40-50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
And 5, heating the polished titanium ingot to 20-40 ℃ below the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, and drawing and forging on a 45MN hydraulic press to obtain bars with the specification of phi 250-350mm.
Comparative example:
step 1, heating a titanium ingot to 1150 ℃ in a box type electric heating furnace, preserving heat for 6-7h, discharging, and performing cogging forging on a 45MN hydraulic press, wherein the forging process is divided into 3 times of upsetting and drawing, the upsetting and pressing amount is controlled to be 40% -50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
And 2, heating the polished titanium ingot to 50-80 ℃ above the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, performing cogging forging on a 45MN hydraulic press, wherein the forging process is divided into 3 times of upsetting and drawing, the upsetting and pressing amount is controlled to be 40-50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
And 3, heating the polished titanium ingot to 10-30 ℃ above the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, performing cogging forging on a 45MN hydraulic press, wherein the forging process is divided into 3 times of upsetting and drawing, the upsetting and pressing amount is controlled to be 40-50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
And 4, heating the polished titanium ingot to 20-40 ℃ below the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, performing cogging forging on a 45MN hydraulic press, wherein the forging process is divided into 3 times of upsetting and drawing, the upsetting and pressing amount is controlled to be 40-50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
And 5, heating the polished titanium ingot to 20-40 ℃ below the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, performing cogging forging on a 45MN hydraulic press, wherein the forging process is divided into 3 times of upsetting and drawing, the upsetting and pressing amount is controlled to be 40-50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
And 6, heating the polished titanium ingot to 20-40 ℃ below the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, performing cogging forging on a 45MN hydraulic press, wherein the forging process is divided into 3 times of upsetting and drawing, the upsetting and pressing amount is controlled to be 40-50%, and the drawing height-diameter ratio is controlled to be 1.9-2.1.
And (5) throwing the waste after the fire forging is finished, and polishing surface defects.
And 7, heating the polished titanium ingot to 20-40 ℃ below the phase transition point in a box type electric heating furnace, preserving heat for 6-7h, discharging, and drawing and forging on a 45MN hydraulic press to obtain bars with the specification of phi 250-350mm.
The comparative example differs from the example in that the forging is performed by a conventional forging method after the step 1, and two times of heating are increased, and total of 5 pier-drawing forgings are used.
To verify the performance of the titanium alloy bars obtained by the forging method of TC4 titanium alloy bars, the bars obtained in examples and comparative examples were tested according to the present invention, as shown in fig. 2 and 3. As is clear from the graph, the microstructure, room temperature elongation (annealed state) and high temperature elongation (annealed state) of the forged bars obtained in the examples are similar to those of the forged bars obtained in the comparative examples, and the annealing schedule is shown in tables 1 and 2. Therefore, the invention can reduce forging fire under the condition of ensuring the structural performance of TC4 titanium alloy forging bars, and complete cost reduction and efficiency improvement.
Table 1 phi 250mm gauge TC4 wrought bar room temperature tensile properties
TABLE 2 high temperature (400 ℃) tensile Properties of TC4 forging bars with 250mm specification
The invention also provides a forging device of the TC4 titanium alloy bar, as shown in fig. 4. The device comprises: the first cogging forging unit is used for obtaining a titanium ingot after first cogging forging; the reciprocating heating forging unit is used for carrying out reciprocating heating forging on the titanium ingot subjected to the first cogging forging to obtain a titanium ingot subjected to the reciprocating heating forging; and the titanium alloy bar obtaining unit is used for performing twice cogging forging and drawing forging on the titanium ingot subjected to the reciprocating heating forging to obtain the target titanium alloy bar.
Since the apparatus is protected similarly to the above method, it will not be described in detail herein with reference to the above method.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (10)
1. A method of forging a TC4 titanium alloy bar, comprising:
obtaining a titanium ingot after first cogging forging;
performing reciprocating heating forging on the titanium ingot subjected to the first cogging forging to obtain a titanium ingot subjected to the reciprocating heating forging;
and performing twice cogging forging and drawing forging on the titanium ingot subjected to the reciprocating heating forging to obtain the target titanium alloy bar.
2. The method for forging a TC4 titanium alloy rod according to claim 1, wherein said first cogging forged titanium ingot is subjected to reciprocating heat forging to obtain a reciprocating heat forged titanium ingot, comprising:
heating the titanium ingot subjected to the first cogging forging to a temperature range lower than a phase transition point, and obtaining the titanium ingot subjected to the first upsetting forging through the first upsetting forging;
heating the titanium ingot after the first pier-drawing forging to a temperature range higher than the transformation point, and obtaining the titanium ingot after the second pier-drawing forging through the second pier-drawing forging;
and carrying out heat preservation on the titanium ingot after the second pier drawing forging in a temperature range lower than the phase transition point, and obtaining the titanium ingot after the third pier drawing forging through the third pier drawing forging.
3. The method for forging a TC4 titanium alloy rod according to claim 2, wherein the upsetting press-down amounts in said first upsetting forging, said second upsetting forging and said third upsetting forging are 40% -50% and the ratio of the elongation height to diameter is 1.9-2.1.
4. The forging method of a TC4 titanium alloy rod according to claim 2, wherein said reciprocating heat forged titanium ingot is subjected to two times of cogging forging and drawing forging to obtain a target titanium alloy rod, comprising:
heating the titanium ingot subjected to the third upsetting forging to a temperature range lower than the transformation point, and performing second cogging forging to obtain a titanium ingot subjected to the second cogging forging;
heating the titanium ingot after the second cogging forging to a temperature range lower than the transformation point, and obtaining the titanium ingot after the third cogging forging through the third cogging forging;
and heating the titanium ingot subjected to the third cogging forging to a temperature range lower than the transformation point, and obtaining the target titanium alloy bar through drawing forging.
5. The method for forging a TC4 titanium alloy rod according to claim 4, wherein said first cogging forging, said second cogging forging, and said third cogging forging are each 3 times of upsetting drawing, wherein the upsetting pressing amount is 40% -50%, and the drawing height-diameter ratio is 1.9-2.1.
6. The method for forging a TC4 titanium alloy rod according to claim 4 wherein said temperature range below the transformation point is 20 to 40 ℃ below the transformation point and said temperature range above the transformation point is 50 to 80 ℃ above the transformation point.
7. The method for forging a TC4 titanium alloy rod according to claim 1, wherein obtaining a titanium ingot after first cogging forging includes:
and heating the titanium ingot to a preset temperature and performing cogging forging to obtain the titanium ingot after the first cogging forging.
8. The method of forging a TC4 titanium alloy rod according to claim 7 wherein said predetermined temperature is 1150 ℃.
9. The method of forging a TC4 titanium alloy rod according to claim 1 wherein said target titanium alloy rod is of a gauge of from 250mm to 350mm.
10. A forging apparatus for TC4 titanium alloy bars, comprising:
the first cogging forging unit is used for obtaining a titanium ingot after first cogging forging;
the reciprocating heating forging unit is used for carrying out reciprocating heating forging on the titanium ingot subjected to the first cogging forging to obtain a titanium ingot subjected to the reciprocating heating forging;
and the titanium alloy bar obtaining unit is used for performing twice cogging forging and drawing forging on the titanium ingot subjected to the reciprocating heating forging to obtain the target titanium alloy bar.
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| CN202310604911.4A CN117066420A (en) | 2023-05-26 | 2023-05-26 | Forging method and device for TC4 titanium alloy bar |
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| CN202310604911.4A CN117066420A (en) | 2023-05-26 | 2023-05-26 | Forging method and device for TC4 titanium alloy bar |
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