CN115283592B - Forging and heat treatment process of a 7050 aluminum alloy large ring - Google Patents
Forging and heat treatment process of a 7050 aluminum alloy large ring Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 38
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 37
- 238000005242 forging Methods 0.000 title claims abstract description 34
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 230000032683 aging Effects 0.000 claims abstract description 20
- 238000003754 machining Methods 0.000 claims abstract description 18
- 238000004080 punching Methods 0.000 claims abstract description 9
- 238000010274 multidirectional forging Methods 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 238000010273 cold forging Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 4
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000035882 stress Effects 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 3
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000006104 solid solution Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/02—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough
- B21J1/025—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough affecting grain orientation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B5/00—Extending closed shapes of metal bands by rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/053—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
一种7050铝合金大型环件的锻造及热处理工艺，其步骤为：S1.铸锭尺寸设计；S2.铸锭加热；S3.工模具预热；S4.铸锭改锻；S5.回炉保温；S6.冲孔；S7.再次回炉保温；S8.马架扩孔；S9.再次回炉保温；S10.环轧；S11.机加工；S12.固溶处理；S13.冷变形；S14时效处理；S15再次机加工。本发明针对7050铝合金大型环件，提供了全流程的成形及热处理工艺方案，通过多向锻工艺对铸锭充分改锻，破碎铸态组织中的残余结晶相，通过多级强化固溶，逐步提高固溶温度、延长固溶时间减少未溶结晶相、提高固溶程度。通过双级时效调控晶内和晶界析出相的形态和分布，使产品兼具高强度和高抗应力腐蚀性能。
A forging and heat treatment process for a large 7050 aluminum alloy ring, the steps of which are: S1. ingot size design; S2. ingot heating; S3. tool and die preheating; S4. ingot reforging; S5. re-furnace insulation; S6. punching; S7. re-furnace insulation; S8. rack hole expansion; S9. re-furnace insulation; S10. ring rolling; S11. machining; S12. solution treatment; S13. cold deformation; S14 aging treatment; S15 re-machining. The present invention provides a full-process forming and heat treatment process scheme for large 7050 aluminum alloy rings, fully re-forges the ingot through a multi-directional forging process, breaks up the residual crystalline phase in the cast structure, and gradually increases the solution temperature and prolongs the solution time to reduce the undissolved crystalline phase and improve the degree of solution through multi-stage intensive solution. The morphology and distribution of the intracrystalline and grain boundary precipitation phases are regulated by double-stage aging, so that the product has both high strength and high stress corrosion resistance.
Description
Technical Field
The invention relates to the technical field of aluminum alloy plastic forming and heat treatment, in particular to a forging and heat treatment process of a 7050 aluminum alloy large ring.
Background
The large ring is widely applied to the fields of heavy machinery, aerospace, energy sources and the like. In the aerospace field, the large ring is mainly made of 2A14 and 2219 aluminum alloy, but the strength of the 2XXX aluminum alloy is lower than that of the 7XXX aluminum alloy, and the service requirements of special products cannot be met, so that the 7XXX aluminum alloy is an important research object of the current aerospace model. The 7XXX aluminum alloy has the advantages of high specific strength, high yield ratio, good stress corrosion resistance and the like as super hard aluminum, wherein the 7050 aluminum alloy has higher comprehensive performance and is mainly used for manufacturing members bearing high loads.
The large ring is a main bearing component in the storage box structure of the space carrier, multiple acting forces such as radial compression, axial compression, bending moment and the like are applied in the service process, the stress state is complex, the comprehensive performance requirement is very high, the manufacture of the 7050 aluminum alloy large ring is a key technology for the development of the storage box of the space carrier, but the research and the manufacture of the 7050 aluminum alloy large ring are less in China at present, and no mature and stable deformation and heat treatment process can be referred.
Disclosure of Invention
The invention provides a forging and heat treatment process for 7050 aluminum alloy large-sized ring pieces, which aims to solve the problems, and the product manufactured by the process is uniform in structure and high in comprehensive performance.
The invention adopts the technical scheme that:
A forging and heat treatment process for 7050 aluminum alloy large-sized ring parts comprises the following steps:
S1, designing the size of an ingot, namely adopting 7050 aluminum alloy semicontinuous ingot as a raw material, and designing the size of the ingot according to the size of a part, wherein the required height-diameter ratio L/D=2-2.5;
S2, heating the cast ingot, namely heating the 7050 aluminum alloy cast ingot by adopting an electric furnace, charging the cast ingot at room temperature, and heating to 430+/-5 ℃ along with the furnace, wherein the heat preservation coefficient is 2.2-3 min/mm;
s3, preheating a tool and a die, namely heating an upper hammer anvil and a lower hammer anvil in a heating furnace, preserving heat for 6-10 hours at the temperature of 250 ℃, discharging and mounting, and then coating lubricant;
s4, forging the ingot, namely forging the ingot in a three-upsetting three-drawing multi-directional forging mode, namely upsetting and drawing deformation is carried out for one time along three directions perpendicular to each other along the ingot, and then final upsetting deformation is carried out along the axial direction of the ingot, wherein a cake blank is obtained after upsetting, and the blank height is 120-500 mm;
S5, returning to the furnace for heat preservation, namely preserving the heat of the cake blank for 4-6 hours at 430+/-5 ℃;
s6, punching, namely preheating and lubricating a punch, placing the punch in the center of a cake blank, slowly pressing the punch for a plurality of times, smearing lubricant after each punch is pulled out and before the punch is pressed down, and finally carrying out final punching, wherein the thickness of the continuous sheet is 100-150 mm;
S7, returning to the furnace again for heat preservation, namely preserving the heat of the cake blank for 4-6 hours at 430+/-5 ℃;
S8, performing horse reaming, namely performing horse reaming and flattening end surfaces on the punched blank to prepare a ring blank;
S9, returning to the furnace again for heat preservation, namely preserving heat of the cake-shaped blank for 4-6 hours at 430+/-5 ℃;
S10, ring rolling, namely preheating a roller before rolling, preserving heat for 3-5 hours at the temperature of 250 ℃, enabling the rotation speed of a main roller of the ring rolling machine to be 0.5-0.6 m/s, enabling the diameter growth rate to be 2-3 mm/s, and monitoring the material temperature in the ring rolling process to ensure that the final forging temperature is not lower than 380 ℃;
s11, machining, namely machining the surface of the ring piece after ring rolling, particularly machining the upper end face and the lower end face, and ensuring that the end faces and the inner round face and the outer round face are not folded.
S12, solution treatment, namely carrying out solution treatment on the ring piece by adopting graded solution until the ring piece is warm to enter a furnace, starting timing when the furnace temperature reaches 465 ℃, keeping the temperature for an effective size X (1.6-1.8) min, then raising the furnace temperature to 475 ℃ and keeping the temperature for 0.6-0.7 min, and finally raising the furnace temperature to 480 ℃ and keeping the temperature for 0.6-0.7 min, wherein the cooling time of the part in water after the part is out of the furnace and quenched is not less than 20min.
S13, cold deformation, namely taking out the part from the quenching tank, and then immediately cold forging, wherein the cold deformation is performed in the height direction of the ring, and the deformation is controlled to be 2-3%;
S14, aging treatment, namely aging the part in time after cold forging, aging the ring part by adopting two-stage aging, heating along with a furnace, preserving heat of the ring part for 4-6 hours at 121 ℃, preserving heat of the ring part for 4-6 hours at 176 ℃, and discharging the ring part for air cooling;
s15, machining again, and machining the aged ring piece to the target delivery size.
In the step S4, the length direction of the last drawn ingot is ensured to be the height direction of the original cast ingot after three piers and three drawing processes, the upsetting deformation in the process is ensured to be 55-65%, and the drawing deformation is ensured to be 40-50%.
And (4) monitoring the material temperature in real time in the ingot casting and forging process in the step S4, and ensuring that the final forging temperature is not lower than 380 ℃.
And the temperature of the blank after the step S6 is not lower than 380 ℃.
And S8, monitoring the material temperature in real time in the reaming process of the horse frame, and ensuring that the final forging temperature is not lower than 380 ℃.
And when the temperature in the ring rolling process of the step S10 is close to 400 ℃, the diameter growth rate is increased, and when the temperature in the ring rolling process is close to 440 ℃, the diameter growth rate is reduced.
And (S13) aging in time after the cold deformation process, wherein the interval between the cold deformation process and the aging process is within 30 min.
Aiming at 7050 aluminum alloy large-sized ring pieces with the diameter of 5m, the invention provides a full-flow forming and heat treatment process scheme, wherein the multi-directional forging process is used for fully forging the cast ingot, breaking residual crystalline phases in an as-cast structure, and gradually increasing the solid solution temperature, prolonging the solid solution time, reducing undissolved crystalline phases and improving the solid solution degree through multi-stage strengthening solid solution. The morphology and the distribution of the intragranular and grain boundary precipitated phases are regulated and controlled through double-stage aging, so that the product has high strength and high stress corrosion resistance.
Drawings
FIG. 1 is a metallographic photograph of a 7050 aluminum alloy large ring of the present invention at 100 times magnification.
Fig. 2 is a metallographic photograph of a 7050 aluminum alloy large ring of the present invention at 500 x magnification.
Detailed Description
The invention relates to a forging and heat treatment process of a 7050 aluminum alloy large ring, which is used for manufacturing a 5-meter-class 7050 aluminum alloy large ring with uniform structure and high comprehensive performance by means of multidirectional forging, multistage solid solution, double-stage aging and the like.
Example 1
Aiming at a 7050 aluminum alloy 5-meter ring in a certain space carrier, the part size phi 5030 multiplied by phi 4984 multiplied by 80mm, and the forging size phi 5070 multiplied by phi 4885 multiplied by 105mm is designed in consideration of factors such as process consumption, machining allowance, sampling ring and the like;
S1, designing the size of an ingot, namely adopting 7050 aluminum alloy semicontinuous ingot as a raw material, and designing the size of the ingot to be phi 580 multiplied by 1230 according to the size of a part;
S2, heating the cast ingot, namely heating the 7050 aluminum alloy cast ingot by adopting an electric furnace, charging the cast ingot at room temperature, and heating to 430+/-5 ℃ along with the furnace, wherein the heat preservation time is 580 multiplied by 2.5 min/mm=1450 min;
s3, preheating a tool and a die, namely heating an upper hammer anvil and a lower hammer anvil in a heating furnace, preserving heat for 8 hours at the temperature of 250 ℃, discharging from the furnace, and smearing lubricant after installation;
S4, forging the ingot in a three-upsetting three-drawing multi-directional forging mode, namely upsetting the ingot in the Z direction until the H=500 mm, drawing the ingot in the X direction until the H=500 mm, upsetting the ingot in the X direction until the H=500 mm, drawing the ingot in the Y direction until the H=540×1115mm, upsetting the ingot in the Y direction until the H=500 mm, drawing the ingot in the Z direction until the H=540×1115mm, axially returning the three-upsetting three-drawing billet to the Z direction of the original ingot, upsetting the ingot in the Z direction until the H=200 mm, and monitoring the material temperature in real time in the forging process to ensure that the final forging temperature is not lower than 380 ℃;
s5, returning to the furnace for heat preservation, namely preserving heat of the cake-shaped blank for 5 hours at 430+/-5 ℃;
S6, punching, namely preheating and lubricating the punch, placing the punch in the center of a cake blank, slowly pressing the punch for a plurality of times, smearing lubricant after each punch is pulled out and before the punch is pressed down, finally forming a skin with the thickness of 120mm, and finally punching to ensure that the temperature of the blank after punching is not lower than 380 ℃;
s7, returning to the furnace for heat preservation, namely preserving heat of the cake-shaped blank for 5 hours at 430+/-5 ℃;
S8, performing horse reaming, namely performing horse reaming and flattening end surfaces on the punched blank to prepare a ring blank, wherein the size of the ring blank is phi 2200 multiplied by phi 1740 multiplied by 205mm, and monitoring the material temperature in real time in the horse reaming process to ensure that the final forging temperature is not lower than 380 ℃;
S9, returning to the furnace again for heat preservation, namely preserving the heat of the cake-shaped blank for 5 hours at 430+/-5 ℃;
S10, ring rolling, namely preheating a roller before rolling, and preserving heat for 5 hours at the temperature of 250 ℃. The rotation speed of a main roller of a ring rolling machine is 0.6m/s, the diameter growth rate is 2.5mm/s, the diameter growth rate is reduced to phi 5090 x phi 4840 x 150mm, the temperature of a material is monitored in the ring rolling process to ensure that the final forging temperature is not lower than 380 ℃, the diameter growth rate is increased to 3mm/s when the temperature in the rolling process is close to 400 ℃, and the diameter growth rate is reduced to 2mm/s when the temperature in the rolling process is close to 440 ℃.
S11, machining, namely carrying out surface machining on the ring piece after ring rolling, in particular to the upper end face and the lower end face, ensuring that the end faces and the inner and outer round faces are not damaged by folding and the like, and machining to phi 5090 multiplied by phi 4840 multiplied by 130mm.
S12, solid solution treatment, namely solid solution treatment is carried out on the ring piece by adopting graded solid solution until the temperature reaches 465 ℃, timing is started, the temperature is kept for 220min, the temperature of the furnace is increased to 475 ℃ and kept for 80min, and finally the temperature of the furnace is increased to 480 ℃ and kept for 80min. And cooling the parts in water for not less than 20min after the parts are discharged from the furnace and quenched.
S13, cold deformation, namely taking out the part from the quenching tank, then immediately cold forging (the process interval is controlled within 30 min), and cold-pressing and deforming in the height direction of the ring piece, wherein the deformation is controlled to be 3-4.5 mm.
S14, aging treatment, namely aging the parts in time after cold forging, controlling the process interval within 30min, aging the ring by adopting two-stage aging, and heating along with a furnace. The ring was incubated at 121 ℃ for 6h and at 176 ℃ for 4h. And discharging the ring piece from the furnace for air cooling.
S15, machining, namely machining the ring piece to the target delivery size phi 5070 multiplied by phi 4885 multiplied by 105mm.
The 5m ring microstructure manufactured by the forging and heat treatment process of the 7050 aluminum alloy large ring piece is shown in figure 1. The mechanical properties are shown in table 1,
TABLE 1
As can be seen from FIGS. 1 and 2, the 7050 aluminum alloy large ring treated by the process has uniform structure, fine crystal grains and the grain size is about 10-20 μm. As can be seen from Table 1, the mechanical property level of the part is higher, the tangential strength is 600MPa, the elongation is 13%, the tangential strength is 546MPa, the elongation is 7.8%, the tangential strength is 580MPa, the elongation is 6%, and no performance low value point exists in each direction.
The foregoing describes the embodiments of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (7)
1. A forging and heat treatment process of a 7050 aluminum alloy large ring is characterized by comprising the following steps:
S1, designing the size of an ingot, namely adopting 7050 aluminum alloy semicontinuous ingot as a raw material, and designing the size of the ingot according to the size of a part, wherein the required height-diameter ratio L/D=2-2.5;
S2, heating the cast ingot, namely heating the 7050 aluminum alloy cast ingot by adopting an electric furnace, charging the cast ingot at room temperature, and heating to 430+/-5 ℃ along with the furnace, wherein the heat preservation coefficient is 2.2-3 min/mm;
s3, preheating a tool and a die, namely heating an upper hammer anvil and a lower hammer anvil in a heating furnace, preserving heat for 6-10 hours at the temperature of 250 ℃, discharging and mounting, and then coating lubricant;
s4, forging the ingot, namely forging the ingot in a three-upsetting three-drawing multi-directional forging mode, namely upsetting and drawing deformation is carried out for one time along three directions perpendicular to each other along the ingot, and then final upsetting deformation is carried out along the axial direction of the ingot, wherein a cake blank is obtained after upsetting, and the blank height is 120-500 mm;
S5, returning to the furnace for heat preservation, namely preserving the heat of the cake blank for 4-6 hours at 430+/-5 ℃;
s6, punching, namely preheating and lubricating a punch, placing the punch in the center of a cake blank, slowly pressing the punch for a plurality of times, smearing lubricant after each punch is pulled out and before the punch is pressed down, and finally carrying out final punching, wherein the thickness of the continuous sheet is 100-150 mm;
S7, returning to the furnace again for heat preservation, namely preserving the heat of the cake blank for 4-6 hours at 430+/-5 ℃;
S8, performing horse reaming, namely performing horse reaming and flattening end surfaces on the punched blank to prepare a ring blank;
S9, returning to the furnace again for heat preservation, namely preserving heat of the cake-shaped blank for 4-6 hours at 430+/-5 ℃;
S10, ring rolling, namely preheating a roller before rolling, preserving heat for 3-5 hours at the temperature of 250 ℃, enabling the rotation speed of a main roller of the ring rolling machine to be 0.5-0.6 m/s, enabling the diameter growth rate to be 2-3 mm/s, and monitoring the material temperature in the ring rolling process to ensure that the final forging temperature is not lower than 380 ℃;
S11, machining, namely machining the surface of the ring piece after ring rolling, particularly machining the upper end face and the lower end face, and ensuring that the end faces and the inner round face and the outer round face are not folded;
S12, solution treatment, namely carrying out solution treatment on the ring piece by adopting graded solution until the ring piece is warm to enter a furnace, starting timing when the furnace temperature reaches 465 ℃, keeping the temperature for an effective size X (1.6-1.8) min, then raising the furnace temperature to 475 ℃ and keeping the temperature for 0.6-0.7 min, and finally raising the furnace temperature to 480 ℃ and keeping the temperature for 0.6-0.7 min, wherein the cooling time of the part in water after the part is out of the furnace and quenched is not less than 20min;
s13, cold deformation, namely taking out the part from the quenching tank, and then immediately cold forging, wherein the cold deformation is performed in the height direction of the ring, and the deformation is controlled to be 2-3%;
S14, aging treatment, namely aging the part in time after cold forging, aging the ring part by adopting two-stage aging, heating along with a furnace, preserving heat of the ring part for 4-6 hours at 121 ℃, preserving heat of the ring part for 4-6 hours at 176 ℃, and discharging the ring part for air cooling;
s15, machining again, and machining the aged ring piece to the target delivery size.
2. The 7050 aluminum alloy large ring forging and heat treatment process according to claim 1, wherein in the step S4, the length direction after the last drawing is ensured to be the height direction of the original ingot after three piers and three drawing, the upsetting deformation amount in the process is ensured to be 55-65%, and the drawing deformation amount is ensured to be 40-50%.
3. The 7050 aluminum alloy large ring forging and heat treatment process according to claim 2, wherein the step S4 is characterized in that the temperature of the material is monitored in real time in the ingot forging process, and the final forging temperature is ensured to be not lower than 380 ℃.
4. The forging and heat treatment process of 7050 aluminum alloy large ring according to claim 1, wherein the blank temperature after the step S6 of punching is not lower than 380 ℃.
5. The 7050 aluminum alloy large ring forging and heat treatment process according to claim 1, wherein the step S8 is characterized in that the material temperature is monitored in real time in the horse block reaming process, and the final forging temperature is ensured to be not lower than 380 ℃.
6. The 7050 aluminum alloy large ring forging and heat treatment process according to claim 1, wherein the diameter growth rate is increased when the temperature in the ring rolling process in the step S10 is close to 400 ℃, and the diameter growth rate is decreased when the temperature in the ring rolling process is close to 440 ℃.
7. The forging and heat treatment process of 7050 aluminum alloy large ring according to claim 1, wherein the step S13 is followed by aging in time, and the interval between the cold deformation and aging is within 30 min.
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| CN115740313A (en) * | 2022-11-21 | 2023-03-07 | 湖南中创空天新材料股份有限公司 | Machining process of conical forge piece |
| CN115961223A (en) * | 2022-12-19 | 2023-04-14 | 湖南中创空天新材料股份有限公司 | Method for removing residual stress |
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| CN109759783A (en) * | 2018-12-27 | 2019-05-17 | 天津航天长征技术装备有限公司 | A kind of nearly same sex high-performance aluminium alloy cylindrical forged piece manufacturing process of three-dimensional |
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| CN106244959A (en) * | 2016-08-31 | 2016-12-21 | 无锡派克新材料科技股份有限公司 | The forging of a kind of 7085 aluminium alloys and Technology for Heating Processing |
| CN108746447A (en) * | 2018-05-16 | 2018-11-06 | 江苏理工学院 | A kind of anticorodal forge piece manufacturing process |
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