CN116020970A - High-impact-power TA5 alloy forging ring and preparation method thereof - Google Patents
High-impact-power TA5 alloy forging ring and preparation method thereof Download PDFInfo
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- 238000005242 forging Methods 0.000 title claims abstract description 201
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 80
- 239000000956 alloy Substances 0.000 title claims abstract description 80
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 238000000137 annealing Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 16
- 238000004080 punching Methods 0.000 claims description 15
- 238000004321 preservation Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 11
- 230000009466 transformation Effects 0.000 claims description 9
- 238000007493 shaping process Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000003754 machining Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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Abstract
The invention discloses a high impact power TA5 alloy forging ring and a preparation method thereof, and relates to the technical field of titanium alloy processing, wherein the method comprises the following steps: double cogging and forging are carried out on the TA5 alloy cast ingot to obtain a target forging stock; heating the target forging stock to obtain a forging stock; forging the forging stock to obtain a ring blank; and (3) carrying out double annealing treatment on the ring blank to obtain the TA5 alloy forged ring. The method provided by the invention effectively avoids the cracking of the inner hole of the ring blank in the forging process, on one hand, the machining allowance of the finished ring piece is obviously reduced, on the other hand, the yield of the ring piece in the manufacturing process is obviously improved, and the preparation cost of the forged ring piece is effectively reduced in general. Meanwhile, the heat treatment method of the TA5 alloy ring piece effectively improves the impact power of the ring piece, and the impact power of the ring piece after double annealing treatment in the invention is improved by 1.5-2.0 times compared with that of the ring piece after traditional annealing treatment.
Description
Technical Field
The invention relates to the technical field of titanium alloy processing, in particular to a high impact power TA5 alloy forging ring and a preparation method thereof.
Background
The TA5 alloy is a moderate-strength alpha-titanium alloy, and generally contains about 4% of Al element and a trace amount of B element. The Al element can carry out solid solution strengthening on the alloy, and the B element can refine the structure of the alloy. TA5 alloy has good weldability and corrosion resistance, is often manufactured into products such as forgings, bars, plates, wires and the like, and is widely applied to structural members in marine environments and corrosion resistant members in the chemical industry field.
Although the plasticity of the TA5 medium-strength titanium alloy is better than that of other high-strength titanium alloys, titanium is a difficult-to-deform metal material, and when the TA5 alloy ring member is forged by a traditional method, the ring member is extremely easy to crack, so that the yield is reduced, the machining amount is increased, and the manufacturing cost is increased. The conventional annealing treatment also easily causes the situation that the impact work of the TA5 alloy ring piece is insufficient.
Disclosure of Invention
The invention aims to provide a high impact power TA5 alloy forging ring and a preparation method thereof, which improve the yield of TA5 ring piece preparation, reduce machining allowance, and obviously improve the impact power of the TA5 alloy forging ring. In order to achieve the above purpose, the present invention provides the following technical solutions:
according to one aspect of the present disclosure, there is provided a method of manufacturing a high impact power TA5 alloy forging ring, the method comprising the steps of:
double cogging and forging are carried out on the TA5 alloy cast ingot to obtain a target forging stock;
heating the target forging stock to obtain a forging stock;
forging the forging stock to obtain a ring blank;
and (3) carrying out double annealing treatment on the ring blank to obtain the TA5 alloy forged ring.
Further, the double cogging and forging of the TA5 alloy cast ingot to obtain the target forging stock comprises the following steps:
performing first cogging and forging on the TA5 alloy cast ingot to obtain a first forging-changed blank;
and performing second cogging and forging on the first forging stock to obtain the target forging stock.
Further, the first cogging and forging conditions include:
heating the TA5 alloy cast ingot to 1000-1200 ℃, preserving heat for a first set time, discharging to finish 1-2 times of forging deformation, and finishing 2-3 times of upsetting and drawing forging at each time to obtain a first forging blank; wherein,,
the rate of deformation is 0.005-0.04 s -1 ；
The upsetting pressing amount is more than or equal to 40%;
the temperature of the first forging blank is more than or equal to 1000 ℃.
Further, the second cogging and forging conditions include:
heating the first forging stock to 920-970 ℃, preserving heat for a second set time, discharging to finish 1-2 times of forging deformation, and finishing 2-3 times of upsetting and drawing forging each time to obtain a target forging stock; wherein,,
the rate of deformation is 0.005-0.04 s -1 ；
The upsetting pressing amount is more than or equal to 35%;
the temperature of the target forging blank is more than or equal to 850 ℃.
Further, the heating the target forging stock to obtain a forging stock comprises the following steps:
heating the target forging stock to 920-970 ℃, preserving heat for a third set time, and deforming to a target size after discharging to obtain a forging stock; wherein,,
the rate of deformation is 0.005-0.04 s -1 The deformation pressing-down amount or reducing amount is more than or equal to 33%;
the temperature of the forging stock is more than or equal to 850 ℃.
Further, the forging of the forging stock is performed to obtain a ring blank, which comprises the following steps:
heating the forging stock to the temperature of 30-70 ℃ below the beta phase transition point, preserving heat for a fourth set time, upsetting to the height dimension tolerance requirement range of the target forging ring after tapping, punching, reaming to the inside and outside diameter dimension tolerance requirement range of the target forging ring by adopting a horse frame, and shaping to obtain a ring blank; wherein,,
the upsetting deformation rate is 0.005-0.04 s -1 The upsetting pressing amount is 35% -45%;
the diameter of the punching head of the punching hole is not less than 1/3 of the diameter of the forging stock.
Further, the double annealing treatment is carried out on the ring blank to obtain the TA5 alloy forged ring, which comprises the following steps:
and (3) carrying out double annealing treatment on the ring blank at the temperature of 30-200 ℃ below the beta transformation point, wherein the heat preservation temperature of the first annealing is 30-50 ℃ below the transformation point, the heat preservation temperature of the second annealing is 100-200 ℃ below the transformation point, the heat preservation is carried out for a fifth set time, and cooling to the room temperature by adopting a discharging air cooling mode to obtain the TA5 alloy forging ring.
According to one aspect of the disclosure, a high impact power TA5 alloy forging ring is provided, and the high impact power TA5 alloy forging ring is prepared by the method, wherein the TA5 alloy forging ring comprises the following components in percentage by mass:
al:3.8 to 4.7 percent; b:0.001 to 0.005 percent; fe is less than or equal to 0.3%; o is less than or equal to 0.15 percent; the balance being Ti and other unavoidable impurity elements.
Further, the mechanical properties of the TA5 alloy forging ring include:
the tensile strength is more than or equal to 710MPa; the yield strength is more than or equal to 636MPa; the elongation after break is more than or equal to 12.5%; the area reduction rate is more than or equal to 37.0 percent: the impact energy is more than or equal to 51.2J.
The invention has the technical effects and advantages that:
firstly, the TA5 alloy ring forging method effectively avoids the cracking of the inner hole of the ring blank in the forging process, on one hand, the machining allowance of the finished ring is obviously reduced, on the other hand, the yield of the ring in the manufacturing process is obviously improved, and the preparation cost of the forged ring is effectively reduced overall.
Secondly, the heat treatment method of the TA5 alloy ring piece effectively improves the impact energy of the ring piece, and the impact energy of the ring piece after double annealing treatment in the invention is improved by 1.5-2.0 times compared with that of the ring piece after traditional annealing treatment.
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 claims hereof as well as the appended drawings.
Drawings
FIG. 1 is a flow chart of a preparation method of a TA5 alloy forging ring with high impact energy;
FIG. 2 is a photograph of the forged ring saw prepared in example 1 of the present invention after having flattened the head and tail;
FIG. 3 is a microstructure photograph of a TA5 alloy forging ring in a heat-treated state prepared in example 1 of the present invention;
FIG. 4 is a photograph of the forged ring saw prepared in example 2 of the present invention after having flattened the head and tail;
FIG. 5 is a microstructure photograph of a TA5 alloy forging ring in a heat-treated state prepared in example 2 of the present invention;
FIG. 6 is a photograph of the forged ring saw prepared in the comparative example of the present invention after the head and tail are flattened;
FIG. 7 is a microstructure photograph of a TA5 alloy wrought ring in a heat treated state prepared in comparative example of the present invention.
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.
In order to solve the defects in the prior art, the invention discloses a preparation method of a high impact power TA5 alloy forging ring, and FIG. 1 is a flow chart of the preparation method of the high impact power TA5 alloy forging ring, as shown in FIG. 1, the method comprises the following steps:
s1, double cogging and forging are carried out on a TA5 alloy cast ingot, and a target forging blank is obtained;
s2, heating the target forging stock to obtain forging stock;
s3, forging the forging stock to obtain a ring stock;
s4, carrying out double annealing treatment on the ring blank to obtain the TA5 alloy forged ring.
In step S1 of the present invention, a TA5 alloy ingot is first cogged and forged, comprising: heating the TA5 alloy cast ingot to 1000-1200 ℃, preserving heat for a first set time, discharging to finish 1-2 times of forging deformation, and finishing 2-3 times of upsetting and drawing forging at each time to obtain a first forging blank; wherein the rate of deformation is 0.005-0.04 s -1 The upsetting pressing amount is more than or equal to 40 percent, and the temperature of the first forging blank is more than or equal to 1000 ℃.
Performing second cogging and forging on the first forging blank, including: heating the first forging stock to 920-970 ℃, preserving heat for a second set time, discharging to finish 1-2 times of forging deformation, and finishing 2-3 times of upsetting and drawing forging each time to obtain a target forging stock; wherein the rate of deformation is 0.005-0.04 s -1 The upsetting pressing amount is more than or equal to 35 percent, and the temperature of the target forging blank is more than or equal to 850 ℃.
In step S2 of the present invention, heating the target forging stock includes: heating the target forging stock to 920-970 ℃, preserving heat for a third set time, discharging, and deforming to a target size to obtain a forging stock; wherein the rate of deformation is 0.005-0.04 s -1 The pressing amount or reducing amount of deformation is more than or equal to 33%, and the temperature of the forging stock is more than or equal to 850 ℃.
In step S3 of the present invention, forging the forging stock includes: heating the forging stock to the temperature of 30-70 ℃ below the beta phase transition point, preserving heat for a fourth set time, discharging, upsetting to a target valuePunching after the height dimensional tolerance of the forged ring is within the required range, reaming the forged ring to the required range of the internal and external diameter dimensional tolerance of the target forged ring by adopting a horse, and shaping to obtain a ring blank; wherein the upsetting deformation rate is 0.005 to 0.04s -1 The upsetting pressing amount is 35% -45%; the diameter of the punching head of the punching hole is not less than 1/3 of the diameter of the forging stock.
In step S4 of the present invention, the dual annealing treatment is performed on the ring blank, including: and (3) carrying out double annealing treatment on the ring blank at the temperature of 30-200 ℃ below the beta transformation point, wherein the heat preservation temperature of the first annealing is 30-50 ℃ below the transformation point, the heat preservation temperature of the second annealing is 100-200 ℃ below the transformation point, the heat preservation is carried out for a fifth set time, and cooling to the room temperature by adopting a discharging air cooling mode to obtain the TA5 alloy forging ring.
In the steps S1 to S3 of the present invention, the first set time for heat preservation, the second set time for heat preservation, the third set time for heat preservation, and the fourth set time for heat preservation are all according to: time t of incubation 1 Heating coefficient k 1 X feature size d 1 Calculated, wherein the heating coefficient k 1 Between 0.3 and 0.7 minutes/mm, feature size d 1 Is the smallest dimension of the geometric profile of the ingot or billet. In step S4 of the present invention, the fifth set time is based on: time t of incubation 2 Heating coefficient k 2 X feature size d 2 Calculated, wherein the heating coefficient k 2 Between 0.8 and 1.0 min/mm, feature size d 2 Is the smallest dimension of the geometric outline of the ring blank.
Based on the method, the invention also discloses a TA5 alloy forging ring with high impact energy, wherein the TA5 alloy forging ring comprises the following components in percentage by mass:
al:3.8 to 4.7 percent; b:0.001 to 0.005 percent; fe is less than or equal to 0.3%; o is less than or equal to 0.15 percent; the balance being Ti and other unavoidable impurity elements.
Further, the mechanical properties of the TA5 alloy forging ring include:
the tensile strength is more than or equal to 710MPa; the yield strength is more than or equal to 636MPa; the elongation after break is more than or equal to 12.5%; the area reduction rate is more than or equal to 37.0 percent: the impact energy is more than or equal to 51.2J.
Example 1:
adopts TA5 alloy cast ingots with the specification of phi 750mm, and comprises the following chemical components in percentage by mass: [ Al ] =4.3%, [ B ] =0.005%, [ Fe ]. Ltoreq.0.19%, [ O ]. Ltoreq.0.12%, with the remainder being Ti and other unavoidable impurity elements, the calculated beta phase transition point being 1001.5 ℃.
Step S1, cogging and forging of an ingot: heating the TA5 alloy cast ingot to 1150 ℃, preserving heat for 7.5 hours, discharging to finish 2 times of upsetting, drawing and forging deformation of 1 time, wherein the deformation rate is about 0.007s -1 The upsetting pressing amount is about 40% each time, and the temperature of the obtained first forging blank is more than or equal to 1000 ℃. Then the first forging stock is heated to 950 ℃, the temperature is kept for 7.5 hours, the 2 times of upsetting, drawing and forging deformation of 1 fire time are completed, the target forging stock with the specification phi of 500mm is deformed, and the deformation rate is 0.01s -1 The upsetting pressing amount is about 40% each time, and the temperature of the target forging blank is more than or equal to 850 ℃.
Step S2, forging stock preparation: heating the forging stock material with the specification of phi 500mm obtained in the step S1 to 950 ℃ for 5 hours, and drawing out the furnace to deform to the specification of phi 300mm after discharging, thus completing the preparation of the forging stock; wherein the deformation rate is 0.02s -1 Reducing the diameter by 40%, wherein the temperature of the forging stock is more than or equal to 850 ℃; the forging stock was sawed to give small-sized forging stock of Φ300mm×470 mm.
Step S3, forging a ring blank: heating the small-size forging stock in the step S2 to 950 ℃ for 3 hours, upsetting to 300mm high after tapping, punching, reaming to the outer diameter phi 400mm and the inner diameter phi 240mm by adopting a horse frame, and hot-pressing the flat end for shaping to obtain a ring blank; wherein the upsetting deformation rate is 0.024s -1 The upsetting hold-down amount was 36%; the diameter of the punching head of the punching hole is phi 150mm.
Step S4, heat treatment: and (3) carrying out air cooling to room temperature after the ring blank is kept at 950 ℃ for 1 hour, and then carrying out air cooling to room temperature after the ring blank is kept at 700 ℃ for 1 hour, so as to obtain the TA5 alloy forged ring.
FIG. 2 is a photograph of the end-to-end of the as-forged ring saw prepared in example 1 of the present invention, as shown in FIG. 2, wherein the inside and outside surfaces of the ring are free of macroscopic cracking defects.
FIG. 3 is a photograph showing the microstructure of a forging ring of a TA5 alloy in a heat-treated state prepared in example 1 of the present invention, as shown in FIG. 3, the microstructure of the forging ring is composed of 10 to 50 μm of equiaxed alpha-phase grains.
The TA5 alloy forging ring prepared in the example 1 is subjected to mechanical property test at room temperature, and the measured results are shown in the following table 1, wherein the tensile strength of the forging ring is more than or equal to 710MPa, the yield strength is more than or equal to 644MPa, the elongation after fracture is more than or equal to 12.5%, the area shrinkage is more than or equal to 37%, and the impact energy is 64.5-71.3J; the swage ring of example 1 described above has high impact energy while having high strength.
Table 1 mechanical property test of TA5 alloy forging ring prepared in example 1 under room temperature condition
Example 2:
the same TA5 alloy ingot charge as in example 1 was used.
Step S1, cogging and forging of an ingot: heating the TA5 alloy cast ingot to 1180 ℃, preserving heat for 7.5 hours, discharging to finish 2 times of upsetting, drawing and forging deformation with 1 time, wherein the deformation rate is 0.007s -1 The upsetting pressing amount is 40% each time, and the temperature of the first forging blank is more than or equal to 1000 ℃. Then the first forging stock is heated to 950 ℃ and kept for 7.5 hours, and then discharged to finish 2 times of upsetting, drawing and forging deformation of 1 fire time, and the forging stock is deformed into the target forging stock with the specification of phi 500mm, and the deformation rate is 0.01s -1 The upsetting pressing amount is 40% each time, and the temperature of the target forging blank is more than or equal to 850 ℃.
Step S2, forging stock preparation: the forging stock material with the specification of phi 500mm obtained in the step S1 is heated to 960 ℃ and is kept for 5 hours, and after being discharged from the furnace, the forging stock material is drawn out and deformed to the specification of phi 300mm, thus completing the preparation of the forging stock, wherein the deformation rate is 0.02S -1 The reducing amount is 40 percent, and the temperature of the forging stock is more than or equal to 850 ℃. The forging stock was sawed to give small-sized forging stock of Φ300mm×380 mm.
Step S3, forging a ring blank: heating the small-sized forging stock in the step S2 to 960 ℃, preserving heat for 3 hours, and discharging the forging stockUpsetting to 245mm in height, punching, reaming to the outer diameter phi 400mm and the inner diameter phi 270mm by adopting a horse frame, and hot-pressing the flat end head for shaping to obtain a ring blank. Upsetting deformation speed of 0.024s -1 The upsetting hold-down amount was 35.5%; the diameter of the punching head of the punching hole is phi 150mm.
Step S4, heat treatment: and (3) carrying out air cooling to room temperature after the ring blank is kept at 950 ℃ for 1 hour, and then carrying out air cooling to room temperature after the ring blank is kept at 800 ℃ for 1 hour, so as to obtain the TA5 alloy forged ring.
FIG. 4 is a photograph of the end-to-end of the as-forged ring saw prepared in example 2 of the present invention, as shown in FIG. 4, wherein the inside and outside surfaces of the ring are free of macroscopic cracking defects.
FIG. 5 is a photograph showing the microstructure of a forging ring of a TA5 alloy in a heat-treated state prepared in example 2 of the present invention, as shown in FIG. 5, the microstructure of the forging ring being composed of 10 to 50 μm of equiaxed alpha-phase grains.
The TA5 alloy forging ring prepared in the example 2 is subjected to mechanical property test at room temperature, and the measured results are shown in the following table 2, wherein the tensile strength of the forging ring is more than or equal to 722MPa, the yield strength is more than or equal to 636MPa, the elongation after fracture is more than or equal to 14.0%, the area shrinkage is more than or equal to 38%, and the impact energy is 51.2-59.9J. The swage ring of example 2 also had high impact energy while having high strength.
Table 2 mechanical property test of TA5 alloy forging ring prepared in example 2 under room temperature condition
Comparative example:
the same TA5 alloy ingot charge as in example 1 was used.
Step S1, cogging and forging of an ingot: heating the TA5 alloy cast ingot to 1150 ℃ and preserving heat for 7.5 hours, discharging to finish 2 times of upsetting, drawing and forging deformation of 1 time, wherein the deformation rate is about 0.007s -1 The upsetting pressing amount is about 40% each time, and the temperature of the obtained first forging blank is more than or equal to 1000 ℃. Then the first forging stock is heated to 950 ℃ and is kept for 7.5 hours, and the furnace is discharged to finish 2 upsetting steps of 1 fire timeAfter drawing, forging and deforming, the target forging stock with the specification phi of 500mm is deformed, and the deformation rate is about 0.01s -1 The upsetting pressing amount is about 40% each time, and the temperature of the target forging blank is more than or equal to 850 ℃.
Step S2, forging stock preparation: the forging stock material with the specification of phi 500mm obtained in the step S1 is heated to 960 ℃ and is kept for 5 hours, and after being discharged from the furnace, the forging stock material is drawn out and deformed to the specification of phi 300mm, thus completing the preparation of the forging stock, and the deformation rate is about 0.02S -1 The reducing amount is about 40 percent, and the temperature of the forging stock is more than or equal to 850 ℃. The forging stock was sawed to give small-sized forging stock of Φ300mm×610 mm.
Step S3, forging a ring blank: and (2) heating the small-size forging stock in the step (S2) to 960 ℃, preserving heat for 3 hours, upsetting to 400mm high after tapping, punching, then drawing to 580mm high, reaming to the outer diameter phi 400mm and the inner diameter phi 240mm by adopting a horse frame, and then hot-pressing the flat end for shaping to obtain the ring blank. Upsetting deformation speed is about 0.011s -1 The amount of depression was about 35% and the punch diameter of the punched hole was 150mm.
Step S4, heat treatment: and (3) carrying out air cooling to room temperature after the ring blank is kept at 700 ℃ for 1 hour, so as to obtain the TA5 alloy forging ring. The outer surface of the forging ring has no cracking defect visible to naked eyes, and the inner surface has obvious surface cracks.
Fig. 6 is a picture of the forged ring saw prepared in the comparative example of the present invention after the head and tail are flattened, as shown in fig. 6, the inner surface of the forged ring in the comparative example is cracked, resulting in an increase in the machine addition amount of the forged ring and a decrease in the yield.
FIG. 7 is a photograph of microstructure of a forging ring of a TA5 alloy in a heat-treated state prepared in comparative example of the present invention, as shown in FIG. 7, the microstructure of the forging ring is composed of equiaxed alpha-phase grains of 20 to 50 μm, in which twin crystals are present.
The TA5 alloy forging ring prepared in the comparative example is subjected to mechanical property test at room temperature, and the test results are shown in the following table 3, wherein the tensile strength of the forging ring is larger than or equal to 737MPa, the yield strength is larger than or equal to 685MPa, the elongation after fracture is larger than or equal to 11.0%, the area shrinkage is larger than or equal to 34%, and the impact energy is 33.0-34.8J. The strength of the swage ring in the comparative example was higher than those in examples 1 and 2, but the impact power of the swage ring in the comparative example was significantly lower than those in examples 1 and 2.
Table 3 mechanical property test of TA5 alloy forging ring prepared in comparative example under room temperature condition
The forging ring preparation method provided by the invention improves the yield of the TA5 ring piece preparation, reduces the machining allowance, and simultaneously obviously improves the impact power of the TA5 ring piece. According to the application prospect of TA5 alloy in the field of ocean engineering and the user polling situation in recent years, 24 TA5 ring pieces with single weight of 100kg are conservatively predicted and produced in one year, and the unit price of the products is calculated according to 200 yuan/kg, so that the sales of TA5 forging rings can reach 48 ten thousand per year after implementation. Moreover, as the field requirements of ocean engineering increase, the market demand of TA5 ring members also increases.
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 (9)
1. The preparation method of the TA5 alloy forging ring with high impact energy is characterized by comprising the following steps of:
double cogging and forging are carried out on the TA5 alloy cast ingot to obtain a target forging stock;
heating the target forging stock to obtain a forging stock;
forging the forging stock to obtain a ring blank;
and (3) carrying out double annealing treatment on the ring blank to obtain the TA5 alloy forged ring.
2. The method for preparing a high impact power TA5 alloy forging ring according to claim 1, wherein the double cogging and forging of the TA5 alloy ingot to obtain the target forging stock comprises the following steps:
performing first cogging and forging on the TA5 alloy cast ingot to obtain a first forging-changed blank;
and performing second cogging and forging on the first forging stock to obtain the target forging stock.
3. The method for manufacturing a high impact power TA5 alloy forging ring according to claim 2, wherein the first cogging and forging conditions comprise:
heating the TA5 alloy cast ingot to 1000-1200 ℃, preserving heat for a first set time, discharging to finish 1-2 times of forging deformation, and finishing 2-3 times of upsetting and drawing forging at each time to obtain a first forging blank; wherein,,
the rate of deformation is 0.005-0.04 s -1 ；
The upsetting pressing amount is more than or equal to 40%;
the temperature of the first forging blank is more than or equal to 1000 ℃.
4. The method for manufacturing a high impact power TA5 alloy forging ring according to claim 2, wherein the second cogging and forging conditions comprise:
heating the first forging stock to 920-970 ℃, preserving heat for a second set time, discharging to finish 1-2 times of forging deformation, and finishing 2-3 times of upsetting and drawing forging each time to obtain a target forging stock; wherein,,
the rate of deformation is 0.005-0.04 s -1 ；
The upsetting pressing amount is more than or equal to 35%;
the temperature of the target forging blank is more than or equal to 850 ℃.
5. The method for preparing a high impact power TA5 alloy forging ring according to claim 1, wherein the step of heating the target forging stock to obtain a forging stock comprises the steps of:
heating the target forging stock to 920-970 ℃, preserving heat for a third set time, and deforming to a target size after discharging to obtain a forging stock; wherein,,
the rate of deformation is 0.005-0.04 s -1 The deformation pressing-down amount or reducing amount is more than or equal to 33%;
the temperature of the forging stock is more than or equal to 850 ℃.
6. The method for manufacturing a high impact power TA5 alloy forging ring according to claim 1, wherein the forging of the forging stock to obtain a ring blank comprises:
heating the forging stock to the temperature of 30-70 ℃ below the beta phase transition point, preserving heat for a fourth set time, upsetting to the height dimension tolerance requirement range of the target forging ring after tapping, punching, reaming to the inside and outside diameter dimension tolerance requirement range of the target forging ring by adopting a horse frame, and shaping to obtain a ring blank; wherein,,
the upsetting deformation rate is 0.005-0.04 s -1 The upsetting pressing amount is 35% -45%;
the diameter of the punching head of the punching hole is not less than 1/3 of the diameter of the forging stock.
7. The method for preparing the high impact power TA5 alloy forged ring according to claim 1, wherein the step of performing double annealing treatment on the ring blank to obtain the TA5 alloy forged ring comprises the following steps:
and (3) carrying out double annealing treatment on the ring blank at the temperature of 30-200 ℃ below the beta transformation point, wherein the heat preservation temperature of the first annealing is 30-50 ℃ below the transformation point, the heat preservation temperature of the second annealing is 100-200 ℃ below the transformation point, the heat preservation is carried out for a fifth set time, and cooling to the room temperature by adopting a discharging air cooling mode to obtain the TA5 alloy forging ring.
8. The TA5 alloy forging ring with high impact energy is prepared by the method of any one of claims 1 to 7, and is characterized in that the TA5 alloy forging ring comprises the following components in percentage by mass:
al:3.8 to 4.7 percent; b:0.001 to 0.005 percent; fe is less than or equal to 0.3%; o is less than or equal to 0.15 percent; the balance being Ti and other unavoidable impurity elements.
9. The high impact power TA5 alloy swage ring of claim 8, wherein said TA5 alloy swage ring has mechanical properties comprising:
the tensile strength is more than or equal to 710MPa; the yield strength is more than or equal to 636MPa; the elongation after break is more than or equal to 12.5%; the area reduction rate is more than or equal to 37.0 percent: the impact energy is more than or equal to 51.2J.
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