CN113000756A - Isothermal forging method of titanium alloy case forging - Google Patents
Isothermal forging method of titanium alloy case forging Download PDFInfo
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- CN113000756A CN113000756A CN201911314286.XA CN201911314286A CN113000756A CN 113000756 A CN113000756 A CN 113000756A CN 201911314286 A CN201911314286 A CN 201911314286A CN 113000756 A CN113000756 A CN 113000756A
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- forging
- isothermal
- titanium alloy
- blanking
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- 238000005242 forging Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000010275 isothermal forging Methods 0.000 title claims abstract description 35
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 5
- 238000003754 machining Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K3/00—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like
Abstract
The invention discloses an isothermal forging method of a titanium alloy casing forging, which comprises the following steps: 1) preparing raw materials: selecting a cylindrical titanium alloy bar for blanking to obtain a blanking round bar; 2) pre-forging: placing the blanking round bar into a pre-forging die by adopting an isothermal forging method, and forging the blanking round bar into a long plate intermediate blank; 3) forming and forging: continuously adopting an isothermal forging method, putting the long plate intermediate blank into a forming forging die, and forging into a case forging finished product; 4) and (3) heat treatment: and carrying out standard heat treatment on the finished product of the casing forging. The isothermal forging method is used for producing the isothermal forging of the casing with uniform structure and stable performance, reduces the machining allowance, reduces the manufacturing cost and improves the utilization rate of materials.
Description
Technical Field
The invention relates to the field of isothermal forging of titanium alloy, in particular to an isothermal forging method of a titanium alloy casing forging.
Background
With the continuous emergence of high-performance engines, casings are developed in large size, complex and thin-walled directions. The titanium alloy case has high forging process difficulty, is mainly produced by a rolling ring and a common die forging process in China, and has the defects of large allowance, low metal utilization rate, uneven structure performance and the like.
At present, some researches are carried out in the field of titanium alloy casing forging, for example, patent CN101658895A discloses a method for designing a local loading forming process to obtain a final casing forging, the process cost is low, and the efficiency is high; for example, patent CN207723402U discloses a die for forging large titanium alloy casing type die forgings, which comprises an upper pre-forging die, an upper finish-forging die and a lower die. However, the existing casing forging process still has the problems of large machining allowance, difficulty in ensuring the structure uniformity of a forged piece, high manufacturing cost, low material utilization rate and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the isothermal forging method of the titanium alloy case forged piece, which is used for producing the case isothermal forged piece with uniform structure and stable performance, reduces the machining allowance, reduces the manufacturing cost and improves the utilization rate of materials.
In order to achieve the purpose, the invention adopts the following technical scheme:
an isothermal forging method of a titanium alloy casing forging comprises the following steps:
1) preparing raw materials: selecting a cylindrical titanium alloy bar for blanking to obtain a blanking round bar;
2) pre-forging: placing the blanking round bar into a pre-forging die by adopting an isothermal forging method, and forging the blanking round bar into a long plate intermediate blank;
3) forming and forging: continuously adopting an isothermal forging method, putting the long plate intermediate blank into a forming forging die, and forging into a case forging finished product;
4) and (3) heat treatment: and carrying out standard heat treatment on the finished product of the casing forging.
In the step 1), the specification of the cylindrical titanium alloy bar is phi 150mm +/-50 mm.
In the step 1), the length of the blanking round rod is 1000mm +/-10 mm, and the length-diameter ratio is 6-8.
In the step 2), the forging temperature of isothermal forging is 30-80 ℃ below the phase transition point, the forging pressure is 800-2400T, the forging initial speed is less than or equal to 10mm/s, and the pressure maintaining time is less than or equal to 10 mlin.
In the step 3), the forging temperature of isothermal forging is 30-80 ℃ below the transformation point, the primary forging pressure is 800-2400T, the forging initial speed is less than or equal to 3mm/s, the primary pressure maintaining time is less than or equal to 10min, the secondary forging pressure is 800-2400T, and the secondary pressure maintaining time is less than or equal to 5 min.
The heat treatment is solution treatment: keeping the temperature at 960 ℃ for 1h and cooling in air; aging treatment: keeping the temperature at 590 ℃ for 8h and cooling in air.
The isothermal forging method of the titanium alloy casing forging provided by the invention also has the following beneficial effects:
1) the forging piece of the isothermal forging method has stable performance, uniform structure and controllable whole process;
2) the size control precision of the finished product forge piece of the isothermal forging method can reach 4mm, the size precision of the original conventional forging process is not less than 8mm, the size precision of the ring rolling process is not less than 15mm, the material utilization rate is greatly improved, and the processing difficulty is reduced;
3) according to the isothermal forging method, according to the statistical result, the performance index of the forged piece is uniform and stable, the technical requirement is met, the quality stability index Cpk of strength and hardness is larger than 1.33 (the quality stability indexes of a common die forging process and a ring rolling process are both smaller than 1), and the process of the forged piece is advanced.
Drawings
FIG. 1 is a schematic view of a blanked round bar obtained in the isothermal forging method of the present invention;
FIG. 2 is a schematic view of an intermediate slab of a long plate obtained in the isothermal forging method of the present invention;
FIG. 3 is a schematic representation of the resulting forged part in the isothermal forging method of the present invention;
FIG. 4 is a flow chart of the isothermal forging method of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
The forging full flow of the TA19 casing forging is described in detail with reference to FIG. 4:
1) preparing raw materials: selecting a TA19 cylindrical bar material with the specification of phi 155mm +/-5 mm for blanking to obtain a blanking round bar with the length of 1000mm +/-10 mm, wherein the length-to-diameter ratio (h/phi d) is 6-8, as shown in figure 1;
2) pre-forging: placing the blanking round bar into a pre-forging die by using an isothermal forging method, forging a long plate intermediate blank, wherein the forging temperature is controlled to be 30-80 ℃ below a phase change point, the forging pressure is controlled to be 800-2400T, the forging initial speed is less than or equal to 10mm/s, and the pressure maintaining time is less than or equal to 10 minutes as shown in figure 2;
3) forming and forging: placing the long plate intermediate blank into a forming forging die by using an isothermal forging method, forging a finished product of a cartridge receiver forging piece, wherein the forging temperature is controlled to be 30-80 ℃ below a phase transition point, the forging pressure is controlled to be 800-2400T, the pressure holding time is less than or equal to 10 minutes, the forging pressure is controlled to be 800-2400T, the forging initial speed is less than or equal to 3mm/s, and the pressure holding time is less than or equal to 5 minutes as shown in figure 3;
4) and (3) heat treatment: adopting a standard heat treatment system, and carrying out solution treatment: keeping the temperature at 960 ℃ for 1h and cooling in air; aging treatment: keeping the temperature at 590 ℃ for 8h and cooling in air.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (6)
1. An isothermal forging method of a titanium alloy casing forging is characterized by comprising the following steps:
1) preparing raw materials: selecting a cylindrical titanium alloy bar for blanking to obtain a blanking round bar;
2) pre-forging: placing the blanking round bar into a pre-forging die by adopting an isothermal forging method, and forging the blanking round bar into a long plate intermediate blank;
3) forming and forging: continuously adopting an isothermal forging method, putting the long plate intermediate blank into a forming forging die, and forging into a case forging finished product;
4) and (3) heat treatment: and carrying out standard heat treatment on the finished product of the casing forging.
2. The isothermal forging method of a titanium alloy casing forging according to claim 1, wherein: in the step 1), the specification of the cylindrical titanium alloy bar is phi 150mm +/-50 mm.
3. The isothermal forging method of a titanium alloy casing forging according to claim 1, wherein: in the step 1), the length of the blanking round rod is 1000mm +/-10 mm, and the length-diameter ratio is 6-8.
4. The isothermal forging method of a titanium alloy casing forging according to claim 1, wherein: in the step 2), the forging temperature of isothermal forging is 30-80 ℃ below the phase transition point, the forging pressure is 800-2400T, the forging initial speed is less than or equal to 10mm/s, and the pressure maintaining time is less than or equal to 10 min.
5. The isothermal forging method of a titanium alloy casing forging according to claim 1, wherein: in the step 3), the forging temperature of isothermal forging is 30-80 ℃ below the phase transition point, the primary forging pressure is 800-2400T, the forging initial speed is less than or equal to 3mm/s, the primary pressure maintaining time is less than or equal to 10min, the secondary forging pressure is 800-2400T, and the secondary pressure maintaining time is less than or equal to 5 min.
6. The isothermal forging method of a titanium alloy casing forging according to claim 1, wherein: in the step 4), the heat treatment is solution treatment: keeping the temperature at 960 ℃ for 1h and cooling in air; aging treatment: keeping the temperature at 590 ℃ for 8h and cooling in air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911314286.XA CN113000756A (en) | 2019-12-19 | 2019-12-19 | Isothermal forging method of titanium alloy case forging |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911314286.XA CN113000756A (en) | 2019-12-19 | 2019-12-19 | Isothermal forging method of titanium alloy case forging |
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| CN113000756A true CN113000756A (en) | 2021-06-22 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962487A (en) * | 2014-04-08 | 2014-08-06 | 中国航空工业集团公司北京航空材料研究院 | Large-scale solid-forging metal framework with lugs and manufacturing method thereof |
| CN105397001A (en) * | 2015-12-02 | 2016-03-16 | 贵州安大航空锻造有限责任公司 | Isothermal forging forming method of titanium alloy complex sheet forged piece |
| CN106555076A (en) * | 2017-01-09 | 2017-04-05 | 北京工业大学 | A kind of resistance to 650 DEG C of high-temperature titanium alloy materials and preparation method thereof |
| CN106607540A (en) * | 2015-10-27 | 2017-05-03 | 陕西宏远航空锻造有限责任公司 | Isothermal beta forging method for TC17 titanium alloy blade |
| CN207723402U (en) * | 2017-12-13 | 2018-08-14 | 陕西宏远航空锻造有限责任公司 | A kind of forging mold of large titanium alloy casing class forging part |
| CN109093048A (en) * | 2018-08-01 | 2018-12-28 | 西安三角防务股份有限公司 | A kind of mainframe lock forging mold and forging method |
| CN109317590A (en) * | 2018-10-16 | 2019-02-12 | 中国航发南方工业有限公司 | The forming method of Complex Aluminum Alloy casing forging |
| CN109622840A (en) * | 2018-12-11 | 2019-04-16 | 陕西宏远航空锻造有限责任公司 | A kind of complicated 7075 aluminum alloy casing isothermy die forging methods of the more muscle classes of large size |
-
2019
- 2019-12-19 CN CN201911314286.XA patent/CN113000756A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962487A (en) * | 2014-04-08 | 2014-08-06 | 中国航空工业集团公司北京航空材料研究院 | Large-scale solid-forging metal framework with lugs and manufacturing method thereof |
| CN106607540A (en) * | 2015-10-27 | 2017-05-03 | 陕西宏远航空锻造有限责任公司 | Isothermal beta forging method for TC17 titanium alloy blade |
| CN105397001A (en) * | 2015-12-02 | 2016-03-16 | 贵州安大航空锻造有限责任公司 | Isothermal forging forming method of titanium alloy complex sheet forged piece |
| CN106555076A (en) * | 2017-01-09 | 2017-04-05 | 北京工业大学 | A kind of resistance to 650 DEG C of high-temperature titanium alloy materials and preparation method thereof |
| CN207723402U (en) * | 2017-12-13 | 2018-08-14 | 陕西宏远航空锻造有限责任公司 | A kind of forging mold of large titanium alloy casing class forging part |
| CN109093048A (en) * | 2018-08-01 | 2018-12-28 | 西安三角防务股份有限公司 | A kind of mainframe lock forging mold and forging method |
| CN109317590A (en) * | 2018-10-16 | 2019-02-12 | 中国航发南方工业有限公司 | The forming method of Complex Aluminum Alloy casing forging |
| CN109622840A (en) * | 2018-12-11 | 2019-04-16 | 陕西宏远航空锻造有限责任公司 | A kind of complicated 7075 aluminum alloy casing isothermy die forging methods of the more muscle classes of large size |
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