CN109622839B - Method for obtaining uniform structure of TC11 titanium alloy round cake blank - Google Patents
Method for obtaining uniform structure of TC11 titanium alloy round cake blank Download PDFInfo
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- CN109622839B CN109622839B CN201811511240.2A CN201811511240A CN109622839B CN 109622839 B CN109622839 B CN 109622839B CN 201811511240 A CN201811511240 A CN 201811511240A CN 109622839 B CN109622839 B CN 109622839B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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Abstract
The invention discloses a method for obtaining uniform tissue of a TC11 titanium alloy round cake blank, which is carried out according to the following steps in sequence: blanking, material section forging change, heat treatment, mechanical addition, corrosion, mechanical addition, flaw detection and physical and chemical detection. The disc forging piece produced by the method for obtaining the uniform structure of the TC11 titanium alloy disc blank has uniform structure, high flaw detection qualification rate and stable disc blank performance, and the disc blank for the titanium alloy disc forging piece of the engine can be produced by the method.
Description
Technical Field
The invention belongs to the technical field of forging, and relates to a method for obtaining a uniform structure of a TC11 titanium alloy cake blank.
Background
With the progress of the aviation industry, the high-thrust aircraft engine and the like are rapidly developed, the external dimensions of disk parts such as a compressor disk, a fan wheel disk and the like required by the engine are further enlarged, and the technical standard of the acceptance part still adopts the technical standard of the medium-thrust and low-thrust engine. The TC11 titanium alloy large-size bar produced at present in China can meet the requirements of organization, performance, flaw detection edge level and parts, and has a considerable distance.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the TC11 titanium alloy round cake blank obtains a uniform structure, and the flaw detection level of the round cake blank is improved from the required level of the bar to the required level of the part (bar flaw detection standard, clutter: flat-bottom hole: phi 2.0-12dB round cake blank flaw detection standard, and clutter: flat-bottom hole: phi 0.8-12 dB).
The technical scheme of the invention is as follows: a method for obtaining a uniform structure of a TC11 titanium alloy cake blank sequentially comprises the following steps: blanking, material section forging change, heat treatment, mechanical addition, corrosion, mechanical addition, flaw detection and physical and chemical detection. The method specifically comprises the following steps:
step 1: cutting a TC11 titanium alloy bar material section according to the forging requirement;
step 2: heating the TC11 titanium alloy bar material section in the step 1 at the temperature of 40-45 ℃ below the phase transformation point, and preserving heat;
and step 3: forging the TC11 titanium alloy rod material section obtained in the step 2 into an initial state blank;
and 4, step 4: heating the blank in the initial state in the step 3 at the temperature of 50-60 ℃ below the phase change point, and preserving heat;
and 5: upsetting the blank in the step 4, and then drawing out the blank to the length of the blank in the initial state in the step 3;
step 6: air cooling the blank in the step 5;
and 7: heating the blank in the step 6 at the temperature of 10-25 ℃ below the phase change point, and preserving heat;
and 8: upsetting the blank in the step 7, drawing out the blank to the length of the blank in the initial state in the step 3, upsetting the blank again, and drawing out the blank to the length of the blank in the initial state in the step 3;
and step 9: quickly putting the blank in the step 8 into water at flowing room temperature, and cooling to room temperature;
step 10: heating the blank in the step 9 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
step 11: upsetting the blank in the step 10, drawing to the length of the blank in the initial state in the step 3, and upsetting;
step 12: air cooling the blank in the step 11;
step 13: heating the blank in the step 12 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
step 14: drawing out the blank in the step 13 to the length of the blank in the initial state in the step 3, then upsetting, and then drawing out to the length of the blank in the initial state in the step 3;
step 15: air cooling the blank in the step 14;
step 16: heating the blank in the step 15 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
and step 17: upsetting the blank in the step 16, and then drawing out the blank to the length of the blank in the initial state in the step 3;
step 18: heating the blank in the step 17 at the phase change point of 10-25 ℃, and preserving heat according to corresponding coefficients;
step 19: upsetting the blank in the step 18, drawing out the blank to the length of the blank in the initial state in the step 3, upsetting the blank, and drawing out the blank to the length of the blank in the initial state in the step 3;
step 20: quickly putting the blank in the step 19 into water at flowing room temperature, and cooling to room temperature;
step 21: heating the blank in the step 20 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
step 22: upsetting the blank in the step 21, drawing out the blank to the length of the blank in the initial state in the step 3, and upsetting the blank;
step 23: air cooling the blank in the step 22;
step 24: heating the blank in the step 23 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
step 25: drawing the blank in the step 24 to the length of the blank in the initial state in the step 3, upsetting the blank, and drawing to the length of the blank in the initial state in the step 3;
step 26: air cooling the blank in the step 25;
step 27: heating the blank in the step 26 at the temperature of 40-45 ℃ below the phase change point, and preserving heat according to corresponding coefficients;
step 28: upsetting the blank in the step 27, and then drawing out the blank to the length of the blank in the initial state in the step 3;
step 29: air cooling the blank in the step 28;
step 30: repeating the step 21-26 once, and then executing the next step;
step 31: heating the blank in the step 30 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
step 32: forging the blank of step 31 into a round cake;
step 33: and (4) carrying out heat treatment, machining, corrosion, machining, flaw detection and physical and chemical detection on the round cake blank in the step 32, and finally finishing the production of the round cake forged piece with uniform texture.
Preferably, the radius of the fillet of the TC11 titanium alloy rod material section in the step 1 is r, and the r is 10-15 mm according to the diameter size of the TC11 titanium alloy rod material section.
Preferably, the deformation of the upsetting step in all the steps is 30% to 50% each time, and the deformation of the elongation step in all the steps is 30% to 50% each time.
The invention has the beneficial effects that:
the TC11 titanium alloy disc part has uniform structure, so that the performance of each part of the disc part meets the standard requirement, and the service life of an engine is prolonged.
Drawings
FIG. 1 is a schematic high magnification organization of a bar.
FIG. 2 is a schematic diagram of a high power structure of a disc forging.
FIG. 3 is a forging heating profile.
Detailed Description
1. Preliminary basic research
On the basis of computer simulation, the practical production test result under the coordination of the geometric parameters of the shape of upsetting and drawing of the blank and the parameters of the hot working process is researched.
2. Upsetting and drawing out
The size and shape of the upset, draw can be designed and adjusted by computer simulation techniques based on the determination of the basic forging parameters.
3. Formulation of heat treatment process of round cake blank
For the heat treatment protocol of the wafer blank, the heat treatment process specifications specified by the standards are also adopted here in view of comparison with previous production methods.
Examples
The specific forging steps are as follows:
1, blanking:
1.1 equipment: sawing according to 4 GS-65.
1.2 marking: smelting furnace (generation) number and ingot section number.
And (4) checking: a detection tool: a tape measure. Caliper rule
And (5) detecting the content, namely monitoring the whole process of the working procedure 1, and checking the blanking specification phi 230 × 780, the marking content and the like.
2, blank machining:
2.1 equipment: turning a lathe;
2.2 machining: and chamfering the two ends of the bar stock to R10, wherein the chamfering does not allow the top pinhole to be punched.
And (4) checking: a detection tool: and (4) an R gauge.
Detecting the content: the whole process of the process 2 is monitored, and the bar chamfer R10 is checked.
3, forging:
3.1 heating:
3.1.1 heating apparatus: the electric furnace is used for heating and meets the requirements of GJB904A III and above furnaces;
3.1.2 heating Specification: the heating curve is shown in figure 3
3.1.3 heating technical requirements:
1) the heating and heat preservation time of the cold materials is calculated according to 0.8min/mm, and the heat preservation time of the hot materials after returning to the furnace is calculated according to 0.5 min/mm;
2) the heating and heat preservation time of the subsequent fire-time cold material in the production is calculated according to 0.8min/mm, and the heat preservation time of the hot material returning is calculated according to 0.5min/mm
3) When normal production cannot be carried out due to equipment failure and the like, the heat preservation time is allowed to be prolonged to be less than or equal to 1h, if the heat preservation time is more than 1h, the power is cut off for cooling, the temperature is raised again after the failure is eliminated, and the heat preservation time is halved (when the temperature is raised again, if the furnace temperature is more than or equal to 900 ℃, the production can be directly carried out after the temperature is raised to the temperature); when the estimated troubleshooting time is more than or equal to 2 hours, discharging the blank out of the furnace and cooling the blank in air.
3.2, forging:
3.2.1 forging equipment: 1600T hydraulic press or 2500T quick forging machine
3.2.2 forging step:
the harvest from phi 230 × 786 to □ 255 + -5 × -500 (require 1-2 fire to complete)
The first step is that □ 255 +/-5 × -500 is upset until H is 300 +/-5 reversing hexagonal chamfer and is drawn out to □ 255 +/-5 × -500 (air cooling)
The first step is that □ 255 +/-5 × -500 is upset until H is 300 +/-5 reversing hexagonal chamfer and is drawn out to □ 255 +/-5 × -500 upset until H is 300 +/-5 hexagonal chamfer and is drawn out to □ 255 +/-5 × -500 (water cooling)
The second step is as follows:
first fire, □ 255 +/-5 × -500 upsetting to H300 +/-5 reversing hexagonal chamfer drawing length to □ 255 +/-5 × -500 upsetting to H300 +/-5
The second fire is that the H is 300 plus or minus 5 hexagonal chamfer is drawn to □ 255 plus or minus 5 × -500 upset, and the H is 300 plus or minus 5 reversing hexagonal chamfer is drawn to □ 255 plus or minus 5 × -500
Third fire, □ 255 +/-5 × -500 upsetting to H300 +/-5 reversing hexagonal chamfer drawing to □ 255 +/-5 × -500
The third step is that □ 255 +/-5 × -500 is upset until H is 300 +/-5 reversing hexagonal chamfer elongation is □ 255 +/-5 × -500 upset until H is 300 +/-5 hexagonal chamfer elongation is □ 255 +/-5 × -500
The fourth step:
first fire, □ 255 +/-5 × -500 upsetting to H300 +/-5 reversing hexagonal chamfer drawing length to □ 255 +/-5 × -500 upsetting to H300 +/-5
The second fire is that the H is 300 plus or minus 5 hexagonal chamfer is drawn to □ 255 plus or minus 5 × -500 upset, and the H is 300 plus or minus 5 reversing hexagonal chamfer is drawn to □ 255 plus or minus 5 × -500
Third fire, □ 255 +/-5 × -500 is upset until H is 300 +/-5, and the hexagonal reverse chamfer is drawn to □ 255 +/-5 × -50
And (4) fourth fire: repeating the first fire once
And (5) fifth fire: repeating the second fire once
The sixth fire, upsetting and rounding to phi 525 × 150/S +3^ -3;
3.2.3 forging technical requirements:
1) upsetting is carried out uniformly by three hammers, and the pressing speed is controlled to be 10-15 mm/s;
2) if the blank has large cracks in the forging process, immediately stopping forging, polishing and removing damages, and then producing;
3) the final forging temperature is more than or equal to 800 ℃;
3.2.4 marking: smelting furnace number (or code number), ingot section number (marked on the side drum).
3.2.5 cooling mode, air cooling.
And (4) checking: a detection tool: caliper, caliper, steel plate ruler and infrared thermometer
Detecting the content: heating temperature, finish forging temperature, height dimension and marking content
4, heat treatment:
the heat treatment system comprises heat preservation for 1-4 h and air cooling for 6h at 530 +/-10 ℃ under the condition that the temperature is allowed to be within 30-50 ℃ below the phase transformation point of β (the temperature is allowed to be properly adjusted).
5, machining: the upper end surface and the lower end surface are machined uniformly, the addition of a single-side machine is less than or equal to 3.0mm, and the machining surface roughness is Ra1.6.
5.1 marking: melting furnace number (or code), ingot section number (marked on the side).
And (4) checking: a detection tool: caliper and roughness detector
Checking the content: machining size, marking content and surface roughness.
6, flaw detection: performed as HB5265, HB5266, flaw detection position: and (4) an upper plane and a lower plane.
6, corrosion: performed as HB 5264.
And 7, physical and chemical detection.
8 Final inspection
The invention particularly provides a method for obtaining a uniform structure of a TC11 titanium alloy cake blank, which can greatly improve the structure (shown in figure 1), the performance and the flaw detection level of a bar, so that the structure (shown in figure 2), the performance and the flaw detection water of the cake blank for producing disc parts can meet the requirements of the parts. The invention greatly improves the production quality of the batch disc parts for the high-thrust aero-engine to a certain extent.
Claims (3)
1. A method for obtaining a uniform structure of a TC11 titanium alloy round cake blank is characterized by comprising the following steps in sequence: blanking, material section forging change, heat treatment, mechanical addition, corrosion, mechanical addition, flaw detection and physical and chemical detection; the method comprises the following steps:
step 1: cutting a TC11 titanium alloy bar material section according to the forging requirement;
step 2: heating the TC11 titanium alloy bar material section in the step 1 at the temperature of 40-45 ℃ below the phase transformation point, and preserving heat;
and step 3: forging the TC11 titanium alloy rod material section obtained in the step 2 into an initial state blank;
and 4, step 4: heating the blank in the initial state in the step 3 at the temperature of 50-60 ℃ below the phase change point, and preserving heat;
and 5: upsetting the blank in the step 4, and then drawing out the blank to the length of the blank in the initial state in the step 3;
step 6: air cooling the blank in the step 5;
and 7: heating the blank in the step 6 at the temperature of 10-25 ℃ below the phase change point, and preserving heat;
and 8: upsetting the blank in the step 7, drawing out the blank to the length of the blank in the initial state in the step 3, upsetting the blank again, and drawing out the blank to the length of the blank in the initial state in the step 3;
and step 9: quickly putting the blank in the step 8 into water at flowing room temperature, and cooling to room temperature;
step 10: heating the blank in the step 9 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
step 11: upsetting the blank in the step 10, drawing to the length of the blank in the initial state in the step 3, and upsetting;
step 12: air cooling the blank in the step 11;
step 13: heating the blank in the step 12 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
step 14: drawing out the blank in the step 13 to the length of the blank in the initial state in the step 3, then upsetting, and then drawing out to the length of the blank in the initial state in the step 3;
step 15: air cooling the blank in the step 14;
step 16: heating the blank in the step 15 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
and step 17: upsetting the blank in the step 16, and then drawing out the blank to the length of the blank in the initial state in the step 3;
step 18: heating the blank in the step 17 at the phase change point of 10-25 ℃, and preserving heat according to corresponding coefficients;
step 19: upsetting the blank in the step 18, drawing out the blank to the length of the blank in the initial state in the step 3, upsetting the blank, and drawing out the blank to the length of the blank in the initial state in the step 3;
step 20: quickly putting the blank in the step 19 into water at flowing room temperature, and cooling to room temperature;
step 21: heating the blank in the step 20 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
step 22: upsetting the blank in the step 21, drawing out the blank to the length of the blank in the initial state in the step 3, and upsetting the blank;
step 23: air cooling the blank in the step 22;
step 24: heating the blank in the step 23 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
step 25: drawing the blank in the step 24 to the length of the blank in the initial state in the step 3, upsetting the blank, and drawing to the length of the blank in the initial state in the step 3;
step 26: air cooling the blank in the step 25;
step 27: heating the blank in the step 26 at the temperature of 40-45 ℃ below the phase change point, and preserving heat according to corresponding coefficients;
step 28: upsetting the blank in the step 27, and then drawing out the blank to the length of the blank in the initial state in the step 3;
step 29: air cooling the blank in the step 28;
step 30: repeating the step 21-26 once, and then executing the next step;
step 31: heating the blank in the step 30 at the temperature of 40-45 ℃ below the phase change point, and preserving heat;
step 32: forging the blank of step 31 into a round cake;
step 33: and (4) carrying out heat treatment, machining, corrosion, machining, flaw detection and physical and chemical detection on the round cake blank in the step 32, and finally finishing the production of the round cake forged piece with uniform texture.
2. The method of claim 1, wherein step 1: the radius of the corner fillet of the TC11 titanium alloy rod material section is r, and according to the diameter size of the TC11 titanium alloy rod material section, the r is 10-15 mm.
3. The method of claim 1, wherein the upsetting step is performed at 30% to 50% per deformation and the elongation step is performed at 30% to 50% per deformation.
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| CN111390079A (en) * | 2020-03-13 | 2020-07-10 | 中铝沈阳有色金属加工有限公司 | Preparation method of ultra-large TC4 alloy cake |
| CN111940654A (en) * | 2020-08-12 | 2020-11-17 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Method for improving and stabilizing flaw detection level of TC6 titanium alloy cake blank |
| CN112139413A (en) * | 2020-09-04 | 2020-12-29 | 中国航发北京航空材料研究院 | Forging method for improving texture and texture uniformity of TC18 titanium alloy large-size bar |
| CN113020914B (en) * | 2021-03-17 | 2022-05-10 | 宁波江丰电子材料股份有限公司 | Machining method of Ti ring part |
| CN113182476B (en) * | 2021-04-28 | 2023-10-13 | 西部钛业有限责任公司 | Preparation method of high-strength TC11 titanium alloy forging |
| CN114309388A (en) * | 2021-12-31 | 2022-04-12 | 无锡派克新材料科技股份有限公司 | Forging process of steel ring forging with ultrahigh-strength structure |
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| JP5576832B2 (en) * | 2011-06-21 | 2014-08-20 | 株式会社神戸製鋼所 | Manufacturing method of ferrite-pearlite type non-tempered forged parts |
| RU2503733C1 (en) * | 2012-11-14 | 2014-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Уфимский государственный авиационный технический университет" | Nanostructured titanium-nickel alloy with shape memory effect and method of making bar thereof |
| CN103938137B (en) * | 2014-04-08 | 2016-01-06 | 中国航空工业集团公司北京航空材料研究院 | A kind of method changing titanium alloy large size bar homogeneity of structure |
| CN106607540B (en) * | 2015-10-27 | 2018-08-24 | 陕西宏远航空锻造有限责任公司 | The forging method of TC17 titanium alloy blade isothermals β forgings |
| CN106591754A (en) * | 2016-12-12 | 2017-04-26 | 陕西宏远航空锻造有限责任公司 | Forging method using flat-die hammer to improve structure property of TC21 titanium alloy |
| CN106903249B (en) * | 2017-03-06 | 2018-10-02 | 湖南金天钛业科技有限公司 | A kind of forging method of high even tissue titanium alloy cake material |
| CN107486524A (en) * | 2017-10-16 | 2017-12-19 | 陕西海恩得工贸有限公司 | A kind of preparation method of titanium alloy cake material |
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